JP2526459Y2 - Waterproof structure of cooling tower cold water tank - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a cooling water tank of a cooling tower.

[0002]

2. Description of the Related Art A cooling tower used for cooling and circulating hot water discharged from an air conditioner of a factory facility, a building, or the like includes a cooling tower in terms of a hot water cooling system. There is a so-called "counter flow method" in which the flow directions of the hot water and the cooling air flow are opposite, and a so-called "cross flow method" in which the flow directions of the hot water and the cooling air flow are at right angles. However, they are common in that they have a cold water tank at the bottom. Therefore, in order to facilitate understanding of the present invention, the role of the cooling water tank in the cooling tower facility will be described with reference to FIG. 2 taking a cross-flow type cooling tower as an example. In FIG. 1, fillers 12, 12 are installed on both sides of a ventilation space 11, a cooling fan 13 is mounted above the ventilation space 11, and a hot water tank 14 is provided above each filler 12, and a hot water tank is provided. 14 is a hot water supply pipe 1
Warm water is supplied from 5 through a watering box 16. Each hot water tank 14 is provided with a watering nozzle 17, and hot water is supplied to the filler 12 by the watering nozzle 17, and the supplied hot water flows down in the filler 12. on the other hand,
The louver 18 on the side of the filler 12 by the cooling fan 13
Then, a flow F of the outside air flowing toward the inside of the ventilation space 11 through the filler 12 is generated, and the hot water flowing down in the filler 12 is cooled by the airflow F. Then, the air after the heat exchange with the hot water is released to the outside after the water drops are separated by the eliminator 19. Thus, the hot water that has passed through the filler 12 becomes cold water and is stored in the cold water tank 20. As described above, in the cross-flow type cooling tower, the flowing hot water is cooled by the airflow supplied from the lateral direction, whereas in the counterflow type cooling tower, the flowing hot water is cooled by the upwardly flowing airflow. However, the other major components of the two cooling towers are substantially the same.

Conventionally, as a waterproofing treatment of the cooling tower chilled water tank, as shown in FIG. 3, the inner surface of the chilled water tank is partially subjected to belt polishing, buffing, etc. to form a rough surface portion 21 in a scattered manner. Then, a method of applying a primer to this portion and spraying a urethane elastomer thereon to form a urethane layer is generally performed. By the way, this chilled water tank is often made of FRP in consideration of rust resistance, and its actual size is 3.5 m (length) × 6 m even if it is small.
The dimensions are (width) x 0.9m (height).
Some reach 15 m (length) x 10 m (width) x 0.9 m (height). Therefore, it is difficult to integrally form the cold water tank, and as shown in FIG. 4, a plurality of portions 20a, 20b, 20
c, 20d and the like. However, the spraying of the urethane elastomer often involves so-called pinhole defects. Conventionally, a water filling test in which a water tank was filled with water was used to check whether there was any water leakage due to the pinhole defects. However, when the occurrence of water leakage from the joint portion 22 of the cold water tank is confirmed by this method, even if the urethane tank surface is inspected after draining, it is possible to find the location of the pinhole which is a very small defect. It is difficult.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a cooling tower which effectively prevents water leakage and makes it easy to find the location of the cause of the water leakage. An object of the present invention is to provide a waterproof structure for a cold water tank.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to spray urethane elastomer over the entire inner surface of a cold water tank via a primer applied to a lattice-like rough surface of the inner surface of the cold water tank. And a waterproof structure of a cooling tower cooling water tank.

[0006]

[Function] Even if there is a pinhole in the innermost urethane layer,
Water that has passed through this pinhole is prevented from leaking to the outside at the grid-like primer coating portion. In other words, even if water penetrated into the pinhole penetrates between the urethane layer surrounded by the lattice-shaped primer coating portion and the inner surface of the cold water tank, it is blocked by the primer coating portion and leaks to the outside. Not
Even if a water leak is found, it is possible to easily specify a pinhole generation site that causes the water leak.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a view showing a state in which a primer is applied to the roughened surface of a cooling tower chilled water tank which has been subjected to belt polishing in a grid pattern. Defects 2, 3 and 4 are indicated. And when this cold water tank is filled with water,
As shown in FIG. 1B, the water 6 that has entered the pinhole defects 2 and 3 in the urethane layer 5 is blocked by the primer coating portions 1a and 1b, respectively, and is prevented from flowing out.

On the other hand, since the pinhole defect 4 is located at the joint 7 of the cold water tank, the water 6 that has entered the pinhole defect 4 flows out through the joint 7 of the cold water tank. However, in this case, since the pinhole occurrence site can be estimated to be present in the urethane layer 5 immediately above the water leaking portion, the pinhole site is relatively easy to find, and can be easily repaired by a known method. it can.

[0009]

According to the present invention, since a grid-like primer coating portion is formed on the inner surface of the cold water tank, even if there is water that has entered the pinhole defect of the urethane elastomer in the innermost layer, this water is generated. The outflow to the outside is prevented by being blocked by the lattice-shaped primer application portion. Even if a water leak is recognized, the pinhole can be easily found, and the pinhole can be easily repaired according to a common method.

[Brief description of the drawings]

FIG. 1 (a) is a plan view showing a waterproof structure of a cooling tower cooling water tank of the present invention, and FIG. 1 (b) is a cross-sectional view taken along a line II of FIG. 1 (a).

FIG. 2 is a sectional view of a cross-flow cooling tower.

FIG. 3 is a plan view showing the state of formation of a primer coating section on the inner surface of a conventional cooling tower cooling water tank.

FIG. 4 is a cross-sectional view showing a state in which water leaks from a cooling tower cooling water tank.

[Explanation of symbols]

 1, 1a, 1b: Primer coated part 5: Urethane layer

Claims (1)

(57) [Scope of request for utility model registration] 1. A waterproof structure for a cooling tower cooling water tank, wherein urethane elastomer is sprayed over the entire inner surface of the cooling water tank via a primer applied to a lattice-shaped rough surface portion of the inner surface of the cooling water tank.