JPH0579792A - Straightening plate for cooling tower - Google Patents

Abstract

PURPOSE:To eliminate necessity of coating with paint, to provide a light weight, to improve corrosion resistance and durability and to facilitate handling by setting glass fiber content ratio, a tensile strength, a tensile elastic coefficient, a bending strength, a bending elastic coefficient and a water absorption rate of a straightening plate for a cooling tower to specific values and molding it of an FRP board. CONSTITUTION:A straightening plate 1 of a cooling tower is mounted by clamping bolts and nuts in bolt holes 2. When circulation water is flushed from the top of a heat exchanger 5 to flow down on the exchanger, it is opposed to be mixed with the air straightened by the plate 1 to cool refrigerant in the exchanger 5 while heat exchanging. Glass fiber content ratio is set to 50% or more, a tensile strength is set to 50kg/mm<2> or more, a tensile elastic coefficient is set to 2000kgf/mm<2> or more, a bending strength is set to 50kgf/mm<2> or more, a bending elastic coefficient is set to 1500kgf/mm<2> or more and water absorption rate is set to 0.5wt.% or less in the plate, and the plate is formed of FRP. The plate 1 is not necessarily coated with paint, has a lightweight, excellent corrosion resistance and durability and easy handling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current plate for a cooling tower which has water resistance, corrosion resistance, durability and is easy to install.

[0002]

2. Description of the Related Art A rectifying plate is used to measure the rectification of the air taken in to cool the circulating water of a cooling tower. However, since the circulating water and the air flow are mixed in opposition, the rectifying plate may be dried depending on the wind direction. However, it is in a severe environment where it repeatedly gets wet and wet, and the pressure applied to it is large due to the effects of air vortex. In order to withstand such a severe environment, as a straightening vane, a steel straightening plate has been used as a matter of course. However, steel products are strong enough to withstand tight tightening of bolts and nuts and screws to counteract pressure fluctuations, but on the other hand, because they are repeatedly dried and wet, anticorrosion paints are sufficient. It is necessary to take appropriate rust prevention measures. Moreover, the paint must be repainted every 3 to 6 months. In addition, since a steel plate of 4 to 6 mm is used as the current plate, it is heavy and heavy to handle.

[0003]

[Objective] The object of the present invention is to eliminate the need to apply a paint,
The point is to provide a current plate made of a new material that is lightweight, easy to handle, and can be tightened with bolts and nuts and screws.

[0004]

[Structure] The present invention has a glass fiber content of 50% or more, a tensile strength of 50 kgf / mm ² or more, and a tensile elastic modulus of 2000 k.
gf / mm ² or more, the flexural strength 50 kgf / mm ² or more, flexural modulus 1500 kgf / mm ² or more, water absorption 0.5
The present invention relates to a current plate for a cooling tower, which is less than wt% and is molded by FRP.

The above-mentioned physical properties are necessary for constructing the straightening vane made of FRP, and the desirable conditions are also shown in the following table.

[Table 1]

[0006]

Example The following was used as a cooling tower. Air conditioning capacity 250 tons Cooling capacity 756,000 kcal / hr Fan coil 100 units Water circulation amount 3.25 tons / hr Air motor 5.5KVA Rectifier plate size 500 × 1970mm 4 pieces 500 × 620mm 4 pieces Fig. 1 shows cooling tower Shows a plan view of the A type is a pultrusion type FRP board having a thickness of 2 mm and a width of 50.
0mm, length 1970mm, B type is pultrusion FR
P board is 2mm thick, 500mm wide and 620mm long, and each board has 4 mounting bolt holes.
Each one is provided. The comparative properties of the pultruded FRP board and the steel plate are shown.

[Table 2] FIG. 2 is a sectional view showing the structure of the cooling tower, which is a current plate 1.
Is fastened to the bolt hole 2 with a bolt nut. When the circulating water is flushed from the upper part of the heat exchanger 5 and flows down the heat exchanger, the circulating water is mixed with the air rectified by the rectifying plate 1 so as to exchange heat and cool the refrigerant in the heat exchanger 5. FIG. 3 shows a position where the current plate 1 is attached to the cooling tower.

[0007]

[Effect] The current plate of the present invention does not need to be coated with paint, is lightweight, has excellent corrosion resistance and durability, and is easy to handle.

[Brief description of drawings]

FIG. 1A is a plan view of a straightening vane, where FIG. 1A shows a straightening vane having a long length, and FIG. 1B shows a straightening vane having a short length.

FIG. 2 is a cross-sectional view showing the structure of a cooling tower.

FIG. 3 is a sectional view showing a mounting position of a current plate in the cooling tower.

[Explanation of symbols]

 1 Baffle plate 2 Bolt hole 3 Cooling tower case 4 Exhaust fan 5 Heat exchanger 6 Circulating water pump

Claims (1)

[Claims] 1. A glass fiber content of 50% or more, a tensile strength of 50 kgf / mm ² or more, and a tensile elastic modulus of 2000 kgf.
/ Mm ² or more, the flexural strength 50 kgf / mm ² or more, flexural modulus 1500 kgf / mm ² or more, water absorption 0.5wt
% Or less, and is formed by FRP, a current plate for a cooling tower.