JPH0531436Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a cross-flow type cooling tower, and particularly relates to a cooling tower in which a beam also serves as a water supply channel for an upper water tank.

(Prior art) Conventionally, in general, in this type of cooling tower, an upper water tank is placed above the filler loading chamber, and this upper water tank is used to supply heated circulating water sent from a refrigerator or the like. Some types are equipped with a riser pipe and a water supply header for distributing water to each upper water tank, and are also equipped with a stand for the upper water tank and a flow rate adjustment valve.

On the other hand, in order to simplify the upper structure of this cooling tower, the applicant had previously developed and filed a patent application filed in 1983.
-122355, Utility Model Application Publication No. 122355, Publication No. 30766, there is a device, but this device has beams made of square pipes installed along the tops of both sides of the filler loading chamber that also serve as water supply channels. A large number of water supply holes are provided on the side, and circulating water is sprayed directly into the filler loading chamber at the bottom.

(Problems to be Solved) In the former known type as described above, the upper surface of the cooling tower has a water supply header and valves, making the structure complicated, increasing the weight of the cooling tower itself and pushing up the construction cost. Additionally, the scaffolding environment during maintenance work is poor.

In addition, the latter invention of the earlier application has a considerably improved superstructure of the cooling tower, and although it is somewhat effective, it still requires a water supply header and sprays the filler material directly into the loading chamber from a beam that also serves as a sprinkler pipe. Because of this, when the amount of water supplied is insufficient, it is not possible to spread the water evenly and it is difficult to adjust the distribution, so it feels like a step forward.

Therefore, the purpose of this invention is to further simplify the upper part of the cooling tower and to provide the market with a device that can easily adjust the amount of water supplied to each upper water tank.

(Means for solving the problem) In order to achieve the above-mentioned problem, in this invention, a cooling tower beam is provided on at least one side wall of the upper water tank, and the inside of this beam also serves as a circulating water supply path. The beam that also serves as the circulating water supply channel has a square pipe-like cross section, and a water discharge slit is formed in the axial direction at the upper part of the side wall facing the upper water tank, and the lower edge of the water discharge slit is formed in the upper part of the side wall facing the upper water tank. is a water gutter double-purpose beam forming a weir, and the upstream end of each of the water discharge gutter double-purpose beams is connected and communicated with the side wall of the water supply header double-purpose beam in the horizontal direction in a direction perpendicular to these beams. It will be an AC cooling tower.

In order to achieve the above-mentioned problem, this related invention is a cross-flow type cooling tower characterized in that a flow rate control valve is independently provided at the upstream end portion of each beam that also serves as a water gutter in a cross-flow type cooling tower. Make it a tower.

In addition, in order to achieve the above-mentioned problem, this invention
In some cases, each of the water discharge gutter beams is provided in parallel with a pair of opposite side walls of each upper water tank.

In addition, in order to achieve the above-mentioned problem, this invention is based on the fact that the upper edge of each weir of each gutter-cum-beam is formed to be lower from the upstream side to the downstream side in accordance with the flow gradient. Sometimes it is a feature.

(Function) In this particular device configured as described above, when the circulating water supply pipe is connected to one end of the beam that also serves as the water supply header and circulating water is supplied, the circulating water flowing from the supply pipe is used as the water supply header as well. When the water level is higher than the weir of each gutter beam, it branches from the beam to each gutter beam and flows in the direction of the axis.
The circulating water all passes over this weir and flows into each upper water tank.

In the cross-flow type cooling tower according to claim 2, which is the related device, when the amount of water flowing into the upper water tank is different for each beam serving as a water gutter, the amount of water flowing into the upper water tank is in the vicinity of the upstream end of each beam serving as a water gutter. The flow rate control valves are each independently controlled to adjust the flow rates to be mutually equal and appropriate.

The circulating water that has flowed into the upper water tank is sprayed from the upper water tank onto the group of fillers in the filler loading chamber in the same way as in known devices, and flows down using the surface of each filler in the group of fillers as a wet wall. The sewage water comes in contact with the outside air flowing in horizontally in the timber cluster, and is cooled by heat exchange through direct contact with the outside air and the latent heat of vaporization that accompanies partial evaporation of the sewage water, and flows into the lower water tank of the cooling tower. It is collected, sent to the load by a water pump, heated again and circulated to the water supply pipes.

In the case where beams serving as a water discharge gutter are provided on two opposing sides of the upper water tank, circulating water is simultaneously supplied to the upper water tank from the beams serving as a water discharge gutter on both sides.

In addition, in the case where each weir of each gutter-cum-beam is inclined in accordance with the flow gradient, the circulating water goes over the weir and overflows into the upper water tank approximately evenly over the entire length of each weir.

(Effects) In this particular device which is constructed and operates as described above, the beam along at least one side of the upper water tank constituting the upper part of the cooling tower and the beam perpendicular to this are connected to the water supply channel, respectively. Since the beam is used as a beam that also serves as a water discharge gutter and a beam that also serves as a water supply header, the water supply pipe piping and water control valve do not protrude from the top of the cooling tower as in the case of conventional systems, which not only simplifies the installation work, but also makes the cooling tower The top surface is flat and the deck can be placed on it as it is, improving workability during maintenance management.

Furthermore, since the upper part of the cooling tower is simplified, materials can be saved, the weight of the cooling tower itself can be reduced, and costs can also be reduced.

Furthermore, since no complicated piping is required, the upper surfaces of the water gutter and water supply header beams can be used as a frame for the speed reducer of the blower installed at the exhaust port.

Furthermore, each gutter double-purpose beam has a long slit in the axial direction, and the lower side wall is used as a weir, so that regardless of the flow rate of the circulating water supplied, all the water is sent to the upper water tank all at once over the entire length of this weir. Circulating water is supplied, and there is almost no difference in the supply amount between the upstream end and the downstream end of each gutter-cum-beam.

In particular, in the related invention, since a flow rate control valve is provided at the upstream end of each gutter/beam, the amount of water discharged from each gutter/beam can be adjusted by adjusting the water level that passes over each weir. Adjustments can be made while visually observing changes, flow rate control is easy, and the amount of water supplied to each upper water tank is easy to equalize and adjust to an appropriate amount.

In the case where beams that also serve as water discharge gutter are installed on both sides of each upper water tank, there is no need for these beams to have a large cross section, the number of areas to be provided with beams is reduced, and water supply spots in each upper water tank are reduced. It becomes less.

If the weir of each beam serving as a water discharge gutter is provided with an inclination angle corresponding to the flow gradient of the supplied water, water can be discharged uniformly over the entire length of the weir.

(Example) A typical example of this invention will now be described.

In the figure, reference numeral 10 denotes a cooling tower, which has a box-like shape as a whole, with two opposing sides forming outside air intake ports 11, and a group of 13 supports forming side walls 12 on the other two sides. Of these, the pillars 13a provided exactly in the center of these two outside air intake ports 11,
A beam 14 that also serves as a water supply header is installed and supported between the water supply headers 13a, and is made of a pipe with a square cross section, one end of which is closed with a blind plate, and the other end of which is connected to the supply pipe 15.
A flange 16 is attached to connect with.

A filling material part 17 is formed inside each of the above-mentioned outside air intake ports 11, and an air chamber 18 is formed between these filling material parts 17. one or more exhaust ports 1
9 is formed.

On both sides of the above-mentioned water supply header beam 14, 20 groups of water discharge gutter beams are installed, which are perpendicular to this axis, that is, parallel to and parallel to the outside air intake 11. They are provided at the upper edge and at the upper part of the boundary line between the filler part 17 and the air chamber 18, and the tip of each beam 20 that also serves as a water discharge gutter is supported by the support column 13, respectively. The cross-sectional shape of each beam 20 serving as a water discharge gutter is a vertically long square pipe shape. Water discharge slits 22 are open, and the lower edges of each of these slits 22 constitute a kind of weir 23, respectively. The weir 23, which is the lower edge of the slit 22, is lower toward the downstream, corresponding to the flow gradient.

The middle to lower parts of the beams 20 that also serve as water discharge gutter are connected by a horizontal bottom plate 24, and the end faces of the pair of beams that also serve as water discharge gutter 20 are connected to an upright plate (which also serves as the outer casing wall plate 12 of the cooling tower, but is separate from the base plate 24). ) 25, and the opposing side walls 21 of the pair of water gutter beams 20 are located across the upper water tank 30.
The upper water tank 30 of the cooling tower 10 is formed by the side wall of the water supply header beam 14 and the upright plate 25 or the side plate 12 and bottom plate 24 of the cooling tower 10.
Reference numeral 31 indicates a plurality of water sprinkling devices provided on the bottom plate 24 of the upper water tank 30, and the water sprinkling device 31 may be simply one with distributed holes.

Furthermore, as an embodiment of the specific invention, a flow rate control valve 32 is installed near the upstream end of each beam 20 that serves as a water gutter, and by adjusting its opening degree, water overflows from the weir 23 of each beam 20 that serves as a water gutter. They are provided so that the flow rates can be controlled individually (see Figure 3).

In the illustrated example, beams 20 serving as water discharge gutter 20 are installed on both sides of each filler loading portion 17 so that the slits 22 face each other, but the invention is the same even if only one side is used.

In the illustrated example, the water supply header beam 14 just crosses the center of the air chamber 18.
This beam 14 also serves as a bearing portion 34 of the blower 33 and a frame for the reducer 35 (see FIG. 4).

(Effects of the Embodiment) The device of the embodiment not only has the effects of this invention, but also the beams 14 and 20 serve not only their original role as beams but also the function of the water supply device and the bearing part of the blower 33. 34 and the reduction gear 35, the number of parts and the amount of steel used are significantly smaller than in the conventional type, making the entire cooling tower lighter, and the frame for the entire cooling tower does not need to be as strong as before. Furthermore, the entire device becomes lightweight.

In addition, no complicated piping or valve handles protrude from the top of the cooling tower, allowing maintenance personnel to perform work easily and safely without the risk of tripping over them.

In addition, there are no small protrusions on the top surface of the cooling tower, which gives it a good appearance, and there is almost no need to further enclose it with a ventilation parapet or the like as in the past.

[Brief explanation of the drawing]

The drawings show things related to this invention, and Fig. 1 is a partially cutaway perspective view of the entire cooling tower of this embodiment, Fig. 2 is a longitudinal cross-sectional side view of the upper water tank, and Fig. 3. 4 is a longitudinal sectional front view of the upper water tank portion thereof, and FIG. 4 is a schematic longitudinal sectional side view of the entire cooling tower shown in FIG. 1. In the figure, 10...cooling tower, 14...beam serving as a water supply header, 20...beam serving as a water discharge gutter, 22...slit, 23...weir, 32...flow control valve.

Claims (1)

[Claims for Utility Model Registration] 1. A beam of a cooling tower is provided on at least one side wall of the upper water tank, and the inside of this beam also serves as a circulating water supply channel, and the cooling tower also serves as the circulating water supply channel. The beam has a square pipe-like cross section, and a water discharge slit is formed in the axial direction at the upper part of the side wall facing the upper water tank, and the lower edge of the water discharge slit is a beam that doubles as a water discharge gutter with a weir formed; A cross-flow type cooling tower characterized in that the upstream end of each of the beams serving as a water discharge gutter is connected and communicated with the side wall of the beam serving as a water supply header in a horizontal direction in a direction perpendicular thereto. 2. A cross-flow cooling tower as set forth in claim 1 of the above-mentioned utility model registration, characterized in that a flow control valve is independently provided at the upstream end portion of each beam serving as a water discharge gutter. . 3. Utility model registration claim 1, characterized in that each of the water discharge gutter-functioning beams is provided in a pair parallel to the opposing side walls of each of the upper water tanks.
The cross-flow cooling tower according to item 1 or 2. 4. The upper edge of each weir of each beam serving as a water gutter is formed to be lower from the upstream side to the downstream side in accordance with the flow gradient. Cross-flow cooling tower according to item 2.