Anti-deflection noise reduction device of cooling tower

Abstract

The anti-deflection noise reduction device comprises an energy dissipation and noise reduction air inlet layer arranged at the bottom of the cooling tower, the center of the energy dissipation and noise reduction air inlet layer is provided with a central vertical shaft communicated with an exhaust port of the cooling tower, a plurality of stand columns are evenly distributed in the energy dissipation and noise reduction air inlet layer, and a plurality of herringbone columns used for supporting the energy dissipation and noise reduction air inlet layer are evenly distributed on the periphery of the energy dissipation and noise reduction air inlet layer. A spraying module is arranged at the top, an energy dissipation and noise reduction net is laid below the spraying module, first supporting beams located above the water surface are erected between the stand columns to form a plurality of supporting frames, and supporting pipes are laid on the supporting frames at equal intervals to form a supporting plane. The energy dissipation and noise reduction net is laid on the supporting plane, structural optimization is conducted aiming at the defect that a stretching supporting structure is prone to generating deflection, the flexibility resistance of the noise reduction device is improved, and normal operation of the noise reduction device is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of cooling towers, and in particular to an anti-deflection type noise reduction device for a cooling tower. Background Art

[0002] Due to the rapid development of urban construction and the enhancement of environmental protection awareness, the incidents of cooling tower noise harming residential areas around power plants and office areas in power plants have received more and more attention and attention from all parties. The noise of natural ventilation cooling towers is mainly the splashing noise generated by the falling water flow hitting the surface of the water collection tank, and the noise is transmitted through the air inlet at the bottom of the cooling tower. The whole process is that the cooling water at a high altitude (below the bottom of the splashing filler) converts potential energy into kinetic energy under the action of gravity. When it falls and collides with the water on the surface of the water collection tank, part of the kinetic energy is converted into sound energy for transmission.

[0003] At present, the common noise reduction measures for controlling natural ventilation cooling towers at home and abroad include: silencer guide vanes, sound barriers and water drop energy dissipators. Common cooling tower noise reduction methods have their own advantages and disadvantages. The water drop energy dissipator is the most widely used because it basically does not affect the ventilation volume of the cooling tower and does not occupy the site application other than the cooling tower. By laying a water drop energy dissipator on the surface of the cooling tower pool, the noise generated by the collision between the water and the pool surface is reduced, thereby achieving the purpose of reducing the noise of the cooling tower. However, this noise reduction device currently has the problem of unstable supporting structure. Most existing structures use steel frame ropes as the supporting structure of the noise reduction net. For example, the Chinese utility model patent with the authorization announcement number of CN 213543274 U, this structure is affected by water temperature and climate during operation, resulting in thermal expansion, thereby generating deflection, which destroys the normal operation of the noise reduction device and greatly affects the noise reduction effect. Summary of the invention

[0004] The purpose of the present invention is to propose a cooling tower anti-deflection noise reduction device in view of the shortcomings of the prior art, to optimize the structure of the tensile support structure that is prone to deflection, to improve the anti-flexibility of the noise reduction device, and to ensure the normal operation of the noise reduction device.

[0005] The technical solution to achieve the purpose of the present invention is:

[0006] A cooling tower anti-bending noise reduction device comprises an energy dissipation and noise reduction air inlet layer arranged at the bottom of the cooling tower, a central vertical shaft connected to the exhaust port of the cooling tower is arranged at the center of the energy dissipation and noise reduction air inlet layer, a plurality of columns are evenly distributed inside, a plurality of herringbone columns for supporting the energy dissipation and noise reduction air inlet layer are evenly distributed around, a spray module is arranged on the top, an energy dissipation and noise reduction net is laid under the spray module, a first support beam located above the water surface is erected between the columns to form a plurality of support frames, support pipes are laid on the support frames at equal intervals to form a support plane, and the energy dissipation and noise reduction net is laid on the support plane.

[0007] Further, a second support beam located between the two first support beams is provided on the support plane along a direction perpendicular to the support pipe.

[0008] Further, a support column for supporting the support plane is provided at the intersection point of the second support beam and the support pipe.

[0009] Further, between the first support beam and the column, between the support pipe and the first support beam, between the second support beam and the support pipe, and between the support column and the support pipe are detachably and fixedly connected by clip-type quick connectors.

[0010] Further, the first support beam, the support pipe, and the second support beam are all made of fiberglass, and the support column and the quick connector are both made of stainless steel.

[0011] Further, the energy dissipation and noise reduction net is made of modified PE and includes a plurality of standard energy dissipation and noise reduction areas located on the corresponding support planes. The standard energy dissipation and noise reduction area includes a main energy dissipation and noise reduction area and secondary energy dissipation and noise reduction areas provided on both sides of the main energy dissipation and noise reduction area; the length of the main energy dissipation and noise reduction area is equal to the distance between the central axes of adjacent columns, the width is equal to the spacing between adjacent columns, the length of the secondary energy dissipation and noise reduction area is equal to the spacing between adjacent columns, and the width is equal to the width of the column.

[0012] Further, the energy dissipation and noise reduction net includes multiple layers of noise reduction unit nets.

[0013] Further, the noise reduction unit net is a honeycomb-shaped three-dimensional net woven from wire meshes.

[0014] Further, inclined corrugations composed of rhombic meshes in multiple directions are arranged on the plane of the three-dimensional net, and a double-layer mesh cross structure is formed on the vertical surface.

[0015] Further, male and female buttons that cooperate with each other are evenly distributed on the upper and lower surfaces of the three-dimensional net. The male and female buttons are arranged at the intersections of the wire meshes and are spaced apart. Multiple layers of the noise reduction unit nets are connected by inserting the male buttons into the female buttons.

[0016] Furthermore, the cross-section of the net wire is in the shape of a tower-shaped slope, including a horizontally arranged bottom edge, and a first inclined edge and a second inclined edge that are symmetrically arranged on both sides of the bottom edge and are connected in sequence. The tops of the two second inclined edges converge at a point, and the distance between the bottoms is less than 1 / 2 of the side length of the bottom edge. The height ratio of the first inclined edge to the second inclined edge is 3:1. The net wire with a tower-shaped slope end face is adopted to reduce the contact area between water droplets and the net wire plane and play a role in breaking water droplets. When the water droplets fall into the water collecting pool, they contact the water surface with extremely small mass, overcoming the defect that the traditional noise reduction net cannot change the particle size of water droplets, so that the water droplets are decomposed into nearly fog-like fine water droplets by the inclined cross-section fine net wire for many times, and the energy is greatly reduced, thus greatly improving the noise reduction effect.

[0017] Adopting the above technical solutions, the present invention has the following beneficial effects:

[0018] (1) The present invention optimizes the traditional support structure using guy ropes into a rigid support plane composed of a first support beam and a support pipe, thereby improving the flexural resistance of the entire noise reduction device and ensuring the normal operation of the noise reduction device.

[0019] (2) The present invention improves the structural stiffness of the support surface by adding a second support beam.

[0020] (3) The present invention further improves the structural stiffness of the support surface by adding support columns.

[0021] (4) Quick connectors are used for detachable fixed connection at the beam-column joints of the present invention, which not only ensures the structural rigidity, but also facilitates disassembly and assembly, reduces the construction difficulty, and improves the construction efficiency.

[0022] (5) The present invention uses stainless steel materials to make the structures that need to bear large support forces and connection forces, and uses fiberglass to make the structures that need to play a supporting role but will generate support loads themselves, achieving the best effect of the overall support structure, with high overall strength, stable structure, corrosion resistance, good temperature resistance, and a service life of more than 20 years.

[0023] (6) Through the combined laying of the main and secondary energy dissipation and noise reduction areas, the present invention can completely cover the area above the entire water surface, achieving a better noise reduction effect, being convenient for installation, and facilitating later maintenance and replacement. When damaged, only the damaged single-piece energy dissipation and noise reduction area needs to be replaced, with low maintenance costs.

[0024] (7) The present invention uses multiple layers of three-dimensional nets to jointly dissipate the energy of the falling water droplets. The water droplets undergo multiple rubbing and sticking energy dissipation during the falling process and finally fall into the pool, which can greatly improve the noise reduction effect.

[0025] (8) The multiple layers of three-dimensional nets of the present invention are connected by male and female buttons to form an integral body, which is convenient for paving and ensures that each layer of the net surface is effectively spread out, so as to better dissipate energy and reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the content of the present invention easier to be clearly understood, the following further describes the present invention in detail according to specific embodiments in conjunction with the drawings, where:

[0027] Figure 1 is a structural schematic diagram of the present invention;

[0028] Figure 2 is a structural schematic diagram of the support plane of the present invention;

[0029] Figure 3 is a structural schematic diagram of the standard energy dissipation and noise reduction area of the present invention;

[0030] Figure 4 is a schematic diagram of the multi-layer superposition of the noise reduction unit network of the present invention;

[0031] Figure 5 is a physical diagram of the multi-layer superposition of the noise reduction unit network of the present invention;

[0032] Figure 6 is an elevation schematic diagram of the noise reduction unit network of the present invention;

[0033] Figure 7 is a plan schematic diagram of the noise reduction unit network of the present invention;

[0034] Figure 8 is a physical plan diagram of the noise reduction unit network of the present invention;

[0035] Figure 9 is a schematic diagram of the end face of the wire mesh of the present invention.

[0036] The reference numerals in the drawings are:

[0037] Column 1, herringbone column 2, spray module 3, energy dissipation and noise reduction net 4, main energy dissipation and noise reduction area 4a, secondary energy dissipation and noise reduction area 4b, noise reduction unit net 4-1, wire mesh 4-1-1, bottom edge 4-1-1a, first hypotenuse 4-1-1b, second hypotenuse 4-1-1c, male buckle 4-1-2, female buckle 4-1-3, first support beam 5, support pipe 6, second support beam 7, support column 8. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to better understand the above technical solutions, the following will describe the above technical solutions in detail in conjunction with the drawings of the specification and specific embodiments.

[0039] (Embodiment 1)

[0040] As Figures 1 to 9The shown anti-flexural noise reduction device for cooling towers includes an energy dissipation and noise reduction air inlet layer arranged at the bottom of the cooling tower. A central shaft communicating with the exhaust outlet of the cooling tower is provided at the center of the energy dissipation and noise reduction air inlet layer. A number of upright columns 1 are evenly distributed inside, and a number of herringbone columns 2 for supporting the energy dissipation and noise reduction air inlet layer are evenly distributed around. A spraying module 3 is provided at the top. An energy dissipation and noise reduction net 4 is laid below the spraying module 3. A first support beam 5 above the water surface is erected between the upright columns 1 to form a number of support frames. Support pipes 6 are evenly laid on the support frames at equal intervals to form a support plane. The energy dissipation and noise reduction net is laid on the support plane. By using a rigid support plane to replace the traditional support structure with guy ropes, the anti-flexural property of the entire noise reduction device is improved, ensuring the normal operation of the noise reduction device.

[0041] Specifically, the center distance between adjacent upright columns in this embodiment is 6m. To achieve better support, in this embodiment, a second support beam 7 located between two first support beams 5 is provided on the support plane along the direction perpendicular to the support pipe 6, forming a beam distance of 3m, and a support column 8 for supporting the entire support plane is provided at the intersection point of the second support beam 7 and the support pipe 6.

[0042] To simplify the construction, the first support beam 5 and the upright column 1, the support pipe 6 and the first support beam 5, the second support beam 7 and the support pipe 6, and the support column 8 and the support pipe 6 are all detachably fixed by clamping type quick connectors. The quick connector is a structure combining a T-shaped connecting plate and a bolt, and a flat type or angle steel type T-shaped connecting plate is selected according to the structure of the specific connection part.

[0043] Among them, for the structures that need to bear large support forces and connection forces, they are made of stainless steel materials, such as the support column 8 and the quick connector, and the structures that need to play a supporting role but will generate support loads themselves, such as the first support beam 5, the support pipe 6 and the second support beam 7, are made of fiberglass, achieving the optimal effect of the overall support structure, with high overall strength, stable structure, corrosion resistance, good temperature resistance, and a service life of more than 20 years.

[0044] To achieve a better noise reduction effect, the energy dissipation and noise reduction net 4 in this embodiment is made of modified PE, including a number of standard energy dissipation and noise reduction areas located on the corresponding support planes. The standard energy dissipation and noise reduction area includes a main energy dissipation and noise reduction area 4a and auxiliary energy dissipation and noise reduction areas 4b arranged on both sides of the main energy dissipation and noise reduction area 4a; the length of the main energy dissipation and noise reduction area 4a is equal to the distance between the central axes of adjacent upright columns 1, the width is equal to the distance between adjacent upright columns 1, the length of the auxiliary energy dissipation and noise reduction area 4b is equal to the distance between adjacent upright columns, and the width is equal to the width of the upright column 1. Through the combined laying of the main and auxiliary energy dissipation and noise reduction areas, the entire area above the water surface can be completely covered, achieving a better noise reduction effect, and it is convenient for installation and later maintenance and replacement. When damaged, only the damaged single-piece energy dissipation and noise reduction area needs to be replaced, with low maintenance costs.

[0045] The energy dissipation and noise reduction net includes multiple layers of noise reduction unit nets 4-1. Each layer of the noise reduction unit net is a honeycomb-shaped three-dimensional net woven by wire meshes 4-1-1. Oblique corrugations composed of diamond-shaped meshes in multiple directions are arranged on the plane of the three-dimensional net, and a double-layer mesh cross structure is formed on the vertical surface. Moreover, mating male buttons 4-1-3 and female buttons 4-1-2 are evenly distributed on the upper and lower surfaces of the three-dimensional net. The male buttons 4-1-2 and the female buttons 4-1-3 are arranged at the intersections of the wire meshes and are spaced apart. The multiple layers of noise reduction unit nets 4-1 are connected by inserting the male buttons into the female buttons to form an integral body, which is convenient for paving and ensures that each layer of the net surface can be effectively unfolded, so as to better perform energy dissipation and noise reduction. The thickness of the connected energy dissipation and noise reduction net in this embodiment reaches 120 mm. Each unit block can be directly placed on the supporting plane. The falling water droplets are energy-dissipated by the multiple layers of three-dimensional nets together. The water droplets are subjected to multiple rubbing and sticking energy dissipation during the falling process and finally fall into the pool, which can greatly improve the noise reduction effect.

[0046] In order to further improve the noise reduction effect, the cross-section of the wire mesh 4-1-1 in this embodiment is in a tower-shaped slope shape, including a horizontally arranged bottom edge 4-1-1a and first inclined edges 4-1-1b and second inclined edges 4-1-1c symmetrically arranged on both sides of the bottom edge 4-1-1a and connected in sequence. The tops of the two second inclined edges converge to a point, and the distance between the bottoms is less than 1 / 2 of the side length of the bottom edge. The height ratio of the first inclined edge 4-1-1b to the second inclined edge 4-1-1c is 3:1. Specifically, the total height of the wire mesh is 3 mm, the distance between the bottoms of the two second inclined edges is 1.2 mm, the height is 0.75 mm, and the size of the bottom edge is 2.5 mm. The use of wire meshes with a tower-shaped slope end face reduces the contact area between the water droplets and the wire mesh plane and plays a role in breaking the water droplets. When the water droplets fall into the catchment pool, they contact the water surface with extremely small mass, overcoming the defect that the traditional noise reduction net cannot change the particle size of the water droplets, so that the water droplets are decomposed into nearly mist-like fine water droplets by the thin wire meshes of the inclined section multiple times, and the energy is greatly reduced, thus greatly improving the noise reduction effect, and the noise reduction amplitude is 5-8 BA.

[0047] The present invention uses a supporting surface with a rigid structure to replace the traditional tensile structure supporting surface, improves the anti-flexibility of the noise reduction device, ensures the normal operation of the noise reduction device. At the same time, the noise reduction net adopts a combined mode of drip type and rubbing and sticking type. By arranging oblique corrugations with multiple diamonds and multiple directions on the plane, and the cross-section of the wire mesh is in a tower-shaped slope, it is used to reduce the contact area between the water droplets and the wire mesh plane and play a role in breaking the water droplets. When the falling water droplets contact the wire mesh, they change direction and slide down along the inclined plane by rubbing, or are directly divided into smaller water droplets by the wire mesh. And during the falling process, they contact the same cross-section of the next layer again. After multiple levels of energy dissipation, they finally fall into the pool, so that the water droplets are decomposed into nearly mist-like fine water droplets by the thin wire meshes of the inclined section multiple times, and the energy is greatly reduced. Therefore, the noise reduction effect can be greatly improved.

[0048] The specific embodiments described above further elaborate on the objective, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cooling tower anti-bending noise reduction device, comprising an energy dissipation and noise reduction air inlet layer arranged at the bottom of the cooling tower, wherein the center of the energy dissipation and noise reduction air inlet layer is provided with a central shaft connected to the exhaust port of the cooling tower, a plurality of columns are evenly distributed inside, a plurality of herringbone columns for supporting the energy dissipation and noise reduction air inlet layer are evenly distributed around, a spray module is provided on the top, and an energy dissipation and noise reduction net is laid under the spray module, characterized in that: A first support beam located above the water surface is erected between the columns to form a plurality of support frames, support pipes are laid on the support frames at equal intervals to form a support plane, and the energy dissipation and noise reduction net is laid on the support plane.

2. The cooling tower anti-deflection noise reduction device according to claim 1, characterized in that: A second support beam located between the two first support beams is arranged on the support plane along a direction perpendicular to the support tube.

3. The anti-deflection noise reduction device for a cooling tower according to claim 2, characterized in that: A support column for supporting the support plane is provided at the intersection of the second support beam and the support tube.

4. The anti-deflection noise reduction device for a cooling tower according to claim 3, characterized in that: The first support beam and the column, the support tube and the first support beam, the second support beam and the support tube, and the support column and the support tube are all detachably connected via a splint-type quick connector.

5. The anti-deflection noise reduction device for a cooling tower according to claim 3, characterized in that: The first support beam, the support tube and the second support beam are all made of glass fiber reinforced plastics, and the support column and the quick connector are all made of stainless steel.

6. A cooling tower anti-bending noise reduction device according to any one of claims 1 to 5, characterized in that: The energy dissipation and noise reduction net is made of modified PE, and includes a plurality of standard energy dissipation and noise reduction areas located on corresponding supporting planes, wherein the standard energy dissipation and noise reduction areas include a main energy dissipation and noise reduction area and auxiliary energy dissipation and noise reduction areas arranged on both sides of the main energy dissipation and noise reduction area; the length of the main energy dissipation and noise reduction area is equal to the distance between the central axes of adjacent columns, and the width is equal to the spacing between adjacent columns; the length of the auxiliary energy dissipation and noise reduction area is equal to the spacing between adjacent columns, and the width is equal to the width of the column.

7. A cooling tower anti-bending noise reduction device according to any one of claim 6, characterized in that: The energy dissipation and noise reduction net comprises a multi-layer noise reduction unit net.

8. The anti-deflection noise reduction device for a cooling tower according to any one of claim 7, characterized in that: The noise reduction unit net is a honeycomb three-dimensional net woven from mesh wires.

9. A cooling tower anti-deflection noise reduction device according to any one of claim 8, characterized in that: The plane of the three-dimensional net is arranged with oblique corrugations composed of multi-directional prismatic grids, and the facade presents a double-layer mesh cross structure.

10. The anti-deflection noise reduction device for a cooling tower according to any one of claim 9, characterized in that: The upper surface and the lower surface of the three-dimensional net are evenly distributed with sub-buttons and female buckles that cooperate with each other. The sub-buttons and female buckles are arranged at the intersection of the mesh wires and are distributed at intervals. The multiple layers of the noise reduction unit net are connected by inserting the sub-buttons into the female buckles.

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