RU2239033C1 - Device for water-cooling tower reinforcement - Google Patents

Abstract

FIELD: building, particularly for constructing and reconstructing buildings and structures having round cross-sections, namely water cooling towers.

SUBSTANCE: device has cantilevers secured to bearing members of water-cooling tower structure and pads. Cantilevers extend in radial directions of tower contraction at an angle to horizontal line and fixedly secured to bearing members of contraction by upper ends thereof in one or several points of cantilever central areas. Lower cantilever ends are free and rest upon beveled edge of ring support through pad.

EFFECT: increased strength of bearing members, prevention of structure damage, possibility of efficient load transmission, increased service life and seismic stability, improved ecological safety.

2 cl, 7 dwg

Description

The invention relates to the field of construction and reconstruction of buildings and structures having in plan mainly circular section, in particular cooling towers.

Known devices for reinforcing span structures, including struts attached lower ends to the base, and the upper to the reinforced structure located on the supports. In this case, the device is equipped with a trough-like element and a traction with a tension sleeve. A trough-like element is fixed under the reinforced structure with the possibility of movement along it and pivotally attached to the upper end of the strut. A rod with a tension sleeve is attached on one side to the trough-like element, and on the other hand, to the support of the reinforced structure. The lower end of the strut is pivotally attached to the base [1] (analog).

In the known devices, struts occupy the internal useful space and interfere with maneuvering indoors, and in the presence of an aggressive environment inside the struts, the struts undergo intensive aging and destruction. In superstructures with large heights, struts should have significant bending stiffness so as not to lose the stability of struts.

A device is known for reinforcing building structures, including load-bearing elements with supports and clamps, consoles, a tensioning device and gaskets. It is equipped with reinforcing beams fixed at the ends of the consoles made of variable T-section, and the consoles are rigidly attached to the clamps mounted on the supports of the supporting elements [2] (prototype).

The disadvantages of this device are:

a) the device is not applicable in cooling towers, since the amplification system occupies the internal usable space;

b) in the presence of an aggressive environment inside buildings, the elements of the device undergo intensive aging and destruction, which, in addition to all that, worsens the environmental characteristics of structures;

c) in the zone of the walls of structures (in particular, at the extreme racks of multi-span buildings), the proposed scheme creates an additional bending moment acting on the truss as a result of the action of the load from the floor slabs;

d) for single-span structures, in particular for structures having a circular shape in plan (for example, cooling towers), this device does not allow to solve the problem of ensuring the rational transfer of loads to the supports;

e) the device does not provide a significant increase in the earthquake resistance of buildings or structures.

The objectives (goal) of the present invention are to strengthen the load-bearing elements and prevent the destruction of structures, ensuring a rational transfer of forces in the structure, increasing durability and earthquake resistance, improving environmental performance.

These tasks are achieved by the fact that in the device for strengthening the design of the tower, including consoles attached to the supporting structural elements, and linings, consoles are located in the radial directions of the confuser of the tower, with each console mounted obliquely to the horizontal and rigidly attached to the supporting elements of the confuser with the upper end and in one or more places in the middle part of the console, and the lower end of the console is left free and leans through the lining on the inclined edge of the ring support. In another embodiment, the free ends of adjacent consoles are sequentially connected to each other by means of connecting strips that form a closed polygon in plan. To provide additional rigidity, the free end of the console can be connected via an additional rod to the supporting element of the confuser with the formation of a triangle of rigidity.

Figure 1 schematically shows a cooling tower with a device for strengthening its structure, General view; figure 2 is the same with the connecting strips; figure 3 is a section aa in figure 1; figure 4 is a section bB in figure 2; figure 5 shows a diagram of a device in zone B of figure 1 (enlarged); figure 6 presents a diagram of the device in zone D of figure 2 (enlarged); Fig.7 shows a diagram of one of the options for connecting the console to the confuser (type D).

The cooling tower housing consists of a cylindrical part 1, a confuser 2, a neck 3 and a diffuser 4. The cylindrical part 1 of a cooling tower rests on a rack system 5. The confuser 2, a neck 3 and a diffuser 4, for example, in fan cooling towers are usually made of separate panels 6. Panels 6 represent a thin-walled shell 7, reinforced on the outside of the cooling tower with longitudinal 8 and transverse 9 load-bearing elements. Bearing elements 8 and 9 are reinforcements (for example, channels, corners, other profiles or overlays). The confuser panels are mutually joined to each other along the longitudinal and transverse load-bearing elements, rest on the cylindrical part 1 (usually on the inner upper edge of the upper ring of the cylindrical part) and are fixed by anchors 10.

To strengthen the design of the tower, for example, in the junction zone of the confuser 2 to the cylindrical part 1, a device is installed, including consoles 11 attached to the supporting elements. Consoles 11 are located in radial directions (FIGS. 3 and 4) of the cooling tower confuser 2. Each console 11 is mounted obliquely to the horizontal and is rigidly attached, in particular, to the longitudinal supporting elements 8 of the confuser with the upper end directly or using connecting plates 12 and in one or more places in the middle of the console with plates 13. Connection of the elements of the device (including lining) to the reinforced structure is carried out using fasteners or welding. The lower end of the console 11 is left free and rests through the lining 14 on the obliquely made edge of the annular support of the cylindrical part 1. The free ends of the consoles 11 protrude outward outside the outer outline of the cylindrical part. 1.

In another embodiment, the free ends of adjacent consoles 11 are serially connected to each other by means of connecting strips 15, which are usually located horizontally. The system of planks connecting the consoles to each other along the perimeter of the tower, together form a closed polygon in the plan. The connection of the strips 15 with the lower ends of the consoles 11 can be either rigid or articulated. The latter case is provided to facilitate mounting and dismounting of the strips 15.

To provide additional rigidity in the vertical plane, the free end of the console 11 is connected via an additional rod 16 with the longitudinal bearing element 8 of the confuser with the formation of a triangle of rigidity. In this case, the upper end of the rod 16 is connected directly or by means of connecting plates 17, and the lower end directly (or by additional plates) with the lower end of the console 11. To increase the stability of the rod in the middle part, additional connections can be established with the console and the bearing element of the confuser (communication not shown). The console can be attached not only to the longitudinal supporting element 8, but also to the transverse supporting element 9 or simultaneously to both.

In the simplest case, the links of the device (console 11, strips 15, rod 16) can be connected directly to each other and to the bearing elements of the confuser without using the above-mentioned plates 12, 13 and 17. The connection in this case is carried out by welding both butt-to-butt and overlap of the joined elements .

A device for strengthening the design of the tower is as follows.

During operation, due to corrosion and other factors, the design of the cooling tower casing is worn out, especially in the junction zone of the confuser 2 with the cylindrical part 1. The lower transverse bearing element, the casing in this zone and the anchors 10 are worn out. , which can lead, under certain loads (for example, with strong gusts of wind, seismic effects, etc.) to a complete detachment of the upper part of the structure, including confuser 2, neck 3 and diffuser 4, from the cylindrical part 1. All this can cause catastrophic destruction of the tower as a whole. At the same time, there is a violation of technological cycles in the shops serviced by this tower, and there is a threat of environmental disaster.

Since the console 11 of the device, mounted on the supporting elements of the confuser 2, are supported by the free end through the pads 14 on the cylindrical part 1, they transfer part of the loads to the external inclined platform of the cylindrical part 1. Since the consoles 11 extend beyond the outer outline of the cylindrical part 1, then they prevent the upper part of the housing from falling into the tower or tipping over to its side. In addition, the consoles 11 create compressive forces on the upper region of the cylindrical part 1 and thereby relieve this region from bursting forces acting from the upper part of the housing. There is a mutual compensation of compressive and tensile forces acting on the cylindrical part 1. This ensures a rational transfer of loads to the cylindrical part 1.

The strips 15 significantly increase the stiffness characteristics of the device, since they prevent the free ends of adjacent consoles from moving away from each other and reduce the bending of the consoles 11. The stiffness triangle formed when using the rod 16 significantly increases the bending stiffness of the consoles in the vertical plane.

A device for strengthening the design of the tower is a fairly rigid structure. Rigidity is ensured both through the formation of rigid triangular elements, and through the use of slats. This allows you to increase the strength and stiffness characteristics of the device and its bearing capacity. The device does not occupy the internal usable space and in the presence of an aggressive environment inside the tower, the elements of the device do not undergo intensive aging and destruction. Increases the durability and earthquake resistance of the tower. With possible wear of the lower part of the confuser, the consoles can absorb all the loads and thus prevent catastrophic destruction of the cooling tower and environmental disaster.

The expected economic effect is approximately 570-960 thousand rubles per annum per tower, depending on the type of tower.

Sources of information taken into account

1. USSR Author's Certificate No. 850851, M.Kl. E 04 G 23/04, published July 30, 81 (Bulletin No. 28).

2. Copyright certificate of the USSR No. 623942, M.Kl. E 04 G 23/02, published September 15, 78 (Bulletin No. 34).

Claims (3)

1. Device for strengthening the design of the tower, including consoles attached to the supporting structural elements, and linings, characterized in that the consoles are located in the radial directions of the confuser of the tower, with each console mounted obliquely to the horizontal and rigidly attached to the supporting elements of the confuser with the upper end and one or more places in the middle of the console, and the lower end of the console is left free and is supported through the lining on the inclined edge of the ring support. 2. The device for strengthening the design of the tower according to claim 1, characterized in that the free ends of adjacent consoles are connected in series with each other by means of connecting strips that form a closed polygon in plan. 3. The device for strengthening the design of the tower according to claim 1 or 2, characterized in that the free end of the console is connected via an additional rod to the supporting elements of the confuser with the formation of a stiffness triangle.

Images