Cooling tower air duct with lightning arrester and cooling tower

Abstract

The cooling tower air duct with the lightning arrester comprises an air duct body, connecting pieces and the lightning arrester, the upper end of the air duct body extends outwards to form a turned-over edge, the connecting pieces are arranged in the circumferential direction of the air duct body, each connecting piece comprises a fixing plate and a mounting plate, and the fixing plates and the mounting plates are connected with each other. The fixing plate and the flange are attached to each other and fixedly connected, the mounting plate is obliquely arranged outwards in the direction away from the central axis of the air duct body, the lightning arrester comprises a lightning ring and a down lead connected to the lightning ring, and the lightning ring is fixedly connected to the end, away from the fixing plate, of the mounting plate. A fixing piece used for fixing a down lead is arranged on the outer wall of the air duct body. According to the cooling tower air duct, the lightning protection ring is installed on the installation plate which inclines outwards in the direction away from the central axis of the air duct body, the lightning protection ring is prevented from falling into the air duct body and colliding with fan blades, and use is reliable. The utility model further discloses a cooling tower with the air duct.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, and in particular to a cooling tower chimney and a cooling tower with a lightning protection device. Background Art

[0002] Cooling towers are mainly used to cool the cooling water of heat sources to ensure the normal operation of the system. A cooling tower generally includes a tower body, a chimney provided at the top of the tower body, and a water distribution system and packing provided inside the tower body. When the cooling tower is operating, the circulating water is sprayed on the packing under the action of the water distribution system, and after heat exchange with the dry cold air rising inside the tower, the temperature of the circulating water can be reduced. According to the workload of the cooling system and the site conditions, the height of some cooling towers can reach 100 - 200 meters. In order to protect the cooling tower from lightning strikes, the manufacturers of cooling towers usually need to install lightning protection facilities on the chimney. The installation method of traditional lightning protection facilities is generally to first install a vertical fixing frame on the upper surface of the chimney, and then install the lightning protection ring on the fixing frame. After long-term use, more and more problems gradually emerge. For example, since the circular area on the upper surface of the chimney is small and the connection area between the fixing frame and the chimney is small, it is difficult to ensure the stable connection between the fixing frame and the chimney. Another example is that the lightning protection ring installed on the fixing frame is close to the inner wall edge of the chimney. When welding the lightning protection ring to the fixing frame, the welding machine sparks are likely to fall into the inside of the chimney, thus causing a fire. At the same time, when the lightning protection ring breaks due to various external reasons, the broken lightning protection ring is relatively easy to fall into the chimney, thus colliding with the high-speed rotating fan inside the chimney and damaging the fan blades. Therefore, it is necessary to make structural improvements to the cooling tower chimney with a lightning protection device to overcome the above problems. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is that in the prior art, the lightning protection ring is likely to enter the chimney after breaking due to reasons, resulting in damage to the fan blades. Based on this, the utility model provides a reliable cooling tower chimney with a lightning protection device.

[0004] In addition, the utility model also provides a cooling tower with the above chimney.

[0005] The technical solution adopted by the present utility model to solve its technical problems is as follows: A cooling tower chimney with a lightning protection device, including a chimney body, a connecting member, and a lightning protection device. An outward flange is formed by the upper end of the chimney body extending outward. There are multiple connecting members arranged along the circumferential direction of the chimney body. The connecting member includes a fixed plate and a mounting plate connected to each other. The fixed plate and the flange are in mutual contact and fixedly connected. The mounting plate is inclined outward along the direction away from the central axis of the chimney body. The lightning protection device includes a lightning protection ring and a down conductor connected to the lightning protection ring. The lightning protection ring is fixedly connected to one end of the mounting plate away from the fixed plate. A fixing member for fixing the down conductor is provided on the outer wall of the chimney body.

[0006] Further, mounting holes are formed in the mounting plate, and the lightning protection ring passes through the mounting holes and is fixedly connected to the mounting holes.

[0007] Further, the lightning protection ring and the mounting plate are fixedly connected by welding.

[0008] Further, fixing holes are formed in the fixed plate, and fasteners are installed in the fixing holes. The fixed plate and the flange are fixedly connected through the fasteners.

[0009] Further, the fixed plate and the mounting plate are perpendicular to each other, and a fillet is provided at the connecting part of the fixed plate and the mounting plate.

[0010] Further, the deflection angle of the mounting plate relative to the central axis of the chimney body is α, and 30° ≤ α ≤ 45°.

[0011] Further, the connecting member is an integrally formed structure.

[0012] Further, reinforcing rib plates are arranged on the outer wall of the chimney body along the outer contour of the chimney body. The upper ends of the reinforcing rib plates are fixedly connected to the flange. The fixing member is installed on the reinforcing rib plates, and there are multiple fixing members arranged in sequence along the extending direction of the reinforcing rib plates.

[0013] Further, one side of the fixing member is in contact with and fixedly connected to the reinforcing rib plate. A through hole is formed in the fixing member, and one end of the down conductor passes through the through hole and extends into the ground.

[0014] The beneficial effects of the present utility model are as follows: For the cooling tower chimney or cooling tower with a lightning protection device of the present utility model, the lightning protection ring is installed on the mounting plate that is inclined outward along the direction away from the central axis of the chimney body, increasing the distance between the lightning protection ring and the inner wall of the chimney body, preventing the lightning protection ring from falling into the chimney body and colliding with the fan blades, ensuring reliable use and the normal operation of the cooling tower. Description of the Drawings

[0015] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 is a schematic structural view of a cooling tower chimney with a lightning protection device of the present utility model;

[0017] Figure 2 is Figure 1 a partial enlarged view of part A in the cooling tower chimney with a lightning protection device shown;

[0018] Figure 3 is Figure 2 a sectional view taken along B-B in

[0019] Figure 4 is Figure 2 a front view of the connecting piece in

[0020] Figure 5 is Figure 4 a left view of the connecting piece shown;

[0021] Figure 6 is Figure 4 a top view of the connecting piece shown.

[0022] In the figure: 1. Chimney body, 11. Flange, 12. Reinforcing rib plate, 2. Connecting piece, 21. Fixing plate, 211. Fixing hole, 22. Mounting plate, 221. Mounting hole, 3. Lightning protection device, 31. Lightning protection ring, 32. Down conductor, 4. Fixing piece, 41. Through hole. Specific embodiments

[0023] The present utility model will now be described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present utility model in a schematic manner, so it only shows the components related to the present utility model.

[0024] Please refer to Figures 1-6, the present utility model provides a cooling tower chimney with a lightning protection device, which includes a chimney body 1, a connecting member 2 and a lightning protection device 3. The upper and lower ends of the chimney body 1 are through. An outward extending flange 11 is formed at the upper end of the chimney body 1. There are multiple connecting members 2 and they are evenly arranged along the circumferential direction of the chimney body 1. The connecting member 2 includes a fixed plate 21 and a mounting plate 22 which are connected to each other. The fixed plate 21 and the flange 11 are in mutual contact and fixedly connected. The mounting plate 22 is inclined outward along the direction away from the central axis of the chimney body 1. The lightning protection device 3 includes a lightning protection ring 31 and a down conductor 32 connected to the lightning protection ring 31. The lightning protection ring 31 is fixedly connected to one end of the mounting plate 22 away from the fixed plate 21. A fixing member 4 for fixing the down conductor 32 is provided on the outer wall of the chimney body 1. In this embodiment, the chimney body 1 is made of fiberglass material, the lightning protection device 3 is made of stainless steel material, and the connecting member 2 is made of carbon steel or stainless steel material.

[0025] For the cooling tower chimney with a lightning protection device of the present utility model, since the mounting plate 22 is inclined outward along the direction away from the central axis of the chimney body 1, when the lightning protection ring 31 is fixed to one end of the mounting plate 22 away from the fixed plate 21, the distance between the lightning protection ring 31 and the inner wall of the chimney body 1 is increased. When the lightning protection ring 31 breaks due to some reason, the broken lightning protection ring 31 will not easily fall into the interior of the chimney body 1, thus preventing the lightning protection ring 31 from falling into the chimney body 1 and then colliding with the fan blades, ensuring the normal operation of the cooling tower. In addition, by fitting and fixing the fixed plate 21 with the flange 11 on the chimney body 1, the area of the connection part between the chimney body 1 and the connecting member 2 is increased, improving the installation stability of the connecting member 2.

[0026] As a preferred embodiment, a mounting hole 221 is provided on the mounting plate 22. The lightning protection ring 31 passes through the mounting hole 221 and is fixedly connected to the mounting hole 221. In this embodiment, the lightning protection ring 31 and the mounting plate 22 are fixedly connected by welding. During welding, the welding joint between the lightning protection ring 31 and the mounting plate 22 is full-welded by argon arc welding to prevent the lightning protection ring 31 from loosening. Since the distance between the lightning protection ring 31 and the inner wall of the chimney body 1 is relatively large, the sparks generated during welding are not easily introduced into the interior of the chimney body 1, thus reducing the incidence of fire. During specific installation, the lightning protection ring 31 is composed of multiple lightning protection ring segments. After each lightning protection ring segment is fixed to the corresponding mounting plate 22, the overlapping parts between every two adjacent lightning protection ring segments are connected together by welding, so that multiple lightning protection ring segments jointly form a circular ring structure.

[0027] In addition, a fixing hole 211 is provided on the fixed plate 21. A fastener is installed in the fixing hole 211. The fixed plate 21 and the flange 11 are fixedly connected by the fastener. The fastener includes but is not limited to bolts or screws.

[0028] Please refer to Figures 4-6, As a preferred embodiment, the fixing plate 21 is perpendicular to the mounting plate 22, and a fillet is provided at the connecting portion of the fixing plate 21 and the mounting plate 22. In this embodiment, the radius of the fillet is 5 mm. Additionally, the deflection angle of the mounting plate 22 relative to the central axis of the air duct body 1 is α, where 30° ≤ α ≤ 45°. In this embodiment, α = 30°. Moreover, the connecting member 2 is an integrally formed structure, which is convenient for processing and is beneficial to controlling production costs. Specifically, the connecting member 2 of the present utility model is formed by bending a flat plate structure. Of course, in other embodiments, the fixing plate 21 and the mounting plate 22 can also be independently processed and then welded and fixed, which is not limited herein.

[0029] The outer wall of the air duct body 1 is a streamlined structure with a smooth transition. Along the outer contour of the air duct body 1, reinforcing rib plates 12 are provided on the outer wall of the air duct body 1. The upper ends of the reinforcing rib plates 12 are fixedly connected to the flanges 11, and the fixing members 4 are installed on the reinforcing rib plates 12. There are multiple fixing members 4 and they are arranged in sequence along the extending direction of the reinforcing rib plates 12. By providing the reinforcing rib plates 12, the structural strength of the air duct body 1 is enhanced, and at the same time, it is also convenient for the installation and fixation of the fixing members 4.

[0030] Specifically, the fixing member 4 is in a block structure. One side of the fixing member 4 is in contact with and fixedly connected to the reinforcing rib plate 12. A through hole 41 is provided on the fixing member 4. One end of the downlead 32 passes through the through hole 41 and extends into the ground. The through hole 41 on the fixing member 4 can limit the position of the downlead 32, effectively preventing the downlead 32 from moving easily and ensuring the normal operation of the downlead 32. In this embodiment, the fixing member 4 and the reinforcing rib plate 12 can be fixed by fastening bolts. Additionally, the downlead 32 and the fixing member 4 are fixedly connected by spot welding.

[0031] The present utility model also discloses a cooling tower, which includes the aforementioned cooling tower air duct with a lightning protection device, and further includes a tower body and a fan. The air duct body 1 is fixedly installed on the top of the tower body, and the fan is installed inside the air duct body 1.

[0032] For the cooling tower air duct with a lightning protection device of the present utility model, the lightning protection ring 31 is installed on the mounting plate 22 that is inclined outward away from the central axis of the air duct body 1, increasing the distance between the lightning protection ring 31 and the inner wall of the air duct body 1, preventing the lightning protection ring 31 from falling into the air duct body 1 and colliding with the fan blades, being reliable in use, and ensuring the normal operation of the cooling tower.

[0033] For the cooling tower of the present utility model, because it has all the technical features of the aforementioned cooling tower air duct with a lightning protection device, it has the same technical effects as the aforementioned cooling tower air duct with a lightning protection device.

[0034] Based on the above-mentioned ideal embodiments of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the scope of the present utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A cooling tower duct with a lightning protection device, comprising a duct body, a connecting piece and a lightning protection device, characterized in that: The upper end of the wind duct body extends outward to form a flange, the connecting parts are multiple and are arranged along the circumference of the wind duct body, the connecting parts include a fixing plate and a mounting plate connected to each other, the fixing plate and the flange are fitted with each other and fixedly connected, the mounting plate is tilted outward in a direction away from the central axis of the wind duct body, the lightning protection device includes a lightning protection ring and a down conductor connected to the lightning protection ring, the lightning protection ring is fixedly connected to one end of the mounting plate away from the fixing plate, and a fixing part for fixing the down conductor is provided on the outer wall of the wind duct body.

2. The cooling tower wind duct with a lightning protection device as claimed in claim 1, characterized in that: The mounting plate is provided with a mounting hole, and the lightning protection ring passes through the mounting hole and is fixedly connected to the mounting hole.

3. The cooling tower wind duct with a lightning protection device as claimed in claim 2, characterized in that: The lightning protection ring is fixed to the mounting plate by welding.

4. The cooling tower wind duct with a lightning protection device as claimed in claim 1, characterized in that: The fixing plate is provided with a fixing hole, a fastener is installed in the fixing hole, and the fixing plate and the flange are fixedly connected by the fastener.

5. The cooling tower wind duct with a lightning protection device as claimed in claim 1, characterized in that: The fixing plate and the mounting plate are perpendicular to each other, and a connecting portion between the fixing plate and the mounting plate is provided with a rounded corner.

6. The cooling tower wind duct with a lightning protection device as claimed in claim 5, characterized in that: The deflection angle of the mounting plate relative to the central axis of the wind tube body is α, 30°≤α≤45°.

7. The cooling tower wind duct with a lightning protection device as claimed in claim 1, characterized in that: The connecting piece is an integrally formed structure.

8. The cooling tower wind duct with a lightning protection device as claimed in claim 1, characterized in that: A reinforcing rib plate is arranged on the outer wall of the air duct body along the outer contour of the air duct body, the upper end of the reinforcing rib plate is fixedly connected to the flange, the fixing part is installed on the reinforcing rib plate, and there are multiple fixing parts which are arranged in sequence along the extension direction of the reinforcing rib plate.

9. The cooling tower wind duct with a lightning protection device as claimed in claim 8, characterized in that: One side of the fixing member is attached to and fixedly connected with the reinforcing rib plate, and a through hole is provided on the fixing member, and one end of the down conductor passes through the through hole and extends into the ground.

Images