JP3045799U - Water distribution device for cooling tower - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a water distribution device for a cooling tower, which can reduce the collision force between the circulating water to be spouted and a water distribution box or a regulating valve and greatly reduce the generated noise. SOLUTION: The inner surface of a water distribution box 3 to which the circulating water spouted from a discharge port of a pipe 2 hits is formed with a curved surface, and a porous body having a predetermined thickness and a water permeability is disposed inside the water distribution box 3 to provide a circulating water. By reducing the force of the collision with the inner surface of the water distribution box 3 in each direction and weakening the noise, the noise generated by the collision between the circulating water and the water distribution box 3 can be reduced, and the cooling tower can be further quietened.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a cooling tower water distribution device for distributing circulating water to a heat exchange part in a cooling tower, and particularly to a cooling tower water distribution device capable of distributing water with low noise.

[0002]

[Prior art]

 Generally, cooling towers installed outdoors for the purpose of cooling water used in factories and air-conditioning equipment, etc., come into direct contact with air and heat at the heat exchange section inside the cooling tower, and the temperature difference between the water and air An open-type cooling tower that combines heat transfer using sensible heat, that is, cooling by sensible heat, and cooling by water itself, ie, latent heat (evaporative heat), and air and water that do not come into direct contact with a heat exchanger There is a closed cooling tower.

[0003] Among these, in the open-type cooling tower, in order to sufficiently cool the circulating water to a predetermined temperature through the heat exchange part, conventionally, the circulating water is pressure-fed above the heat exchange part, and the heat exchange part is provided by a water distribution device. In general, a method of dropping at a predetermined flow rate has been used. Conventionally, as such a water distribution device, there is one shown in FIGS. FIG. 4 is a schematic explanatory view of a cooling tower arrangement of a conventional cooling tower water distribution apparatus, and FIG. 5 is a longitudinal sectional view of a cooling tower using the conventional cooling tower water distribution apparatus.

In each of the drawings, the conventional cooling tower water distribution device 100 is disposed so as to guide the circulating water sent to the cooling tower 10 to the upper side of the heat exchange section 11, and the upper end of the heat exchange section 11 A pipe 101 having a discharge port 101a for discharging circulating water upwards, and a lower side disposed above the discharge port 101a of the pipe 101 for weakening the force of the circulating water discharged from the discharge port 101a and flowing downward. A water distribution box 102 having an open and substantially rectangular box shape, and a shallow box-shaped body having a large number of small holes at a bottom portion, which is disposed immediately below the water distribution box 102 and receives circulating water flowing down from the water distribution box 102. An upper water tank 103 for dropping on the heat exchange part 11; and a flat regulating valve disposed inside the water distribution box 102 for adjusting the flow rate of the circulating water from the discharge port 101a by changing the distance from the discharge port 101a. 104 and It is a structure provided with.

The above-mentioned conventional cooling tower water distribution device 100 is capable of dropping a predetermined amount of circulating water to the heat exchange portion by the control valve 104 so that the flow rate can be freely adjusted, and has a simple structure and is advantageous in cost. Has features.

[0006]

[Problems to be solved by the invention]

 Since the conventional cooling tower water distribution device is configured as described above, the circulating water spouting from the discharge port 101a of the pipe 101 vigorously collides with the flat control valve 104 and each surface of the water distribution box 102 from the front. However, there is a problem that noise is continuously generated due to the collision and the splashes generated by the collision scattered around, and the quietness of the entire cooling tower 10 is reduced.

[0007] The present invention has been made to solve the above-described problems, and a water distribution device for a cooling tower capable of weakening a collision force between circulating water and a water distribution box or a regulating valve to greatly reduce noise generated. The purpose is to provide.

[0008]

[Means for Solving the Problems]

 The water distribution device for a cooling tower according to the present invention guides the circulating water sent to the cooling tower to the upper side of the heat exchange part, and covers the pipe having a discharge port for discharging the circulating water, and around the discharge port of the pipe. A water-distribution box having a substantially box-like shape with an open lower side for receiving and flowing down the circulating water spouted from the discharge port, and a box-shaped body having a large number of holes at the bottom to allow water to pass through, An upper water tank disposed above the heat exchange part of the tower and below the water distribution box, for collecting circulating water flowing down from the water distribution box and dropping the circulating water with a predetermined amount of water into the heat exchange part, and facing an outlet of the pipe. The water distribution device for a cooling tower, which is provided so as to be capable of adjusting the distance between the discharge port and the discharge port, and has an adjusting means for adjusting the flow rate of the circulating water, the water distribution box having a curved inner surface. A porous body having a predetermined thickness and having water permeability is provided inside the water distribution box. It is intended to set. As described above, according to the present invention, the inside surface of the water distribution box to which the circulating water spouted from the discharge port of the pipe hits is formed with a curved surface, and a porous body having a predetermined thickness of water permeability is provided inside the water distribution box, By reducing the impact of the circulating water on the inner surface of the distribution box in each direction to reduce the noise generated by the collision between the circulating water and the distribution box, the cooling tower can be further quietened.

[0009] The water distribution device for a cooling tower according to the present invention is provided with an air injection port on the upstream side of the discharge port of the pipe, if necessary, so that circulating water spouted from the pipe contains bubbles. In this way, according to the present invention, the air injection port is provided in the middle of the pipe, and the air bubbles are mixed into the circulating water and blown out as foam water, so that the impingement of the circulating water on the wall of the water distribution box is reduced. In addition to absorbing water, the splash becomes less likely to be scattered after the collision, and the generated noise can be further reduced.

In the water distribution device for a cooling tower according to the present invention, if necessary, the upper water tank has a bottom portion formed of a porous plate having a predetermined thickness and water permeability, and circulates water from the bottom surface. It is exuded and dripped. As described above, according to the present invention, the bottom portion of the upper water tank is formed of a flexible porous plate having a predetermined thickness and is permeable to circulating water, and seeps out from the entire bottom portion. By dropping the circulating water onto the heat exchange part, the position of the circulating water drop is not biased and heat can be exchanged efficiently, and the momentum of the splash of the circulating water from the inner surface of the distribution box to the upper surface of the upper water tank is reduced. As a result, the noise generated in the upper aquarium can be reduced.

In the water distribution device for a cooling tower according to the present invention, if necessary, the adjustment means may be a curved adjustment valve which is disposed inside the water distribution box so as to be vertically movable in opposition to a discharge port. There are. As described above, according to the present invention, the circulating water is provided by having the adjusting valve formed in a curved surface as the adjusting means, and being smoothly deflected along the curved surface while the circulating water hits the adjusting valve. As a result, the momentum of the collision with the control valve is deviated in each direction, and the noise can be reduced.

[0012] In the water distribution device for a cooling tower according to the present invention, the water distribution box is disposed so as to be movable up and down with respect to the discharge port of the pipe as required, and also serves as an adjusting means. The gap is changed to adjust the flow rate of the circulating water. As described above, according to the present invention, the water distribution box is vertically movable, and the gap between the water distribution box and the discharge port can be adjusted to adjust the flow rate of the circulating water. The amount of water can be adjusted correctly, the production cost can be reduced, and the flow of the inside of the distribution box can be made smoother and the generation of noise can be suppressed because there is no obstacle in the distribution box.

[0013]

[Embodiment of the invention]

 Hereinafter, a water distribution device for a cooling tower according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a schematic explanatory view of a cooling tower installation state of the cooling tower water distribution apparatus according to the present embodiment, FIG. 2 is a longitudinal sectional view of the cooling tower water distribution apparatus according to the present embodiment, and FIG. 1 shows a schematic configuration diagram of a main part of a cooling tower water distribution device according to an embodiment.

As shown in the drawings, the cooling tower water distribution device 1 according to the present embodiment is arranged so that the circulating water sent into the cooling tower 10 is guided above the heat exchange portion 11. A pipe 2 formed at an end with a discharge port 2a for discharging circulating water upward, and a water distribution box formed above the discharge port 2a of the pipe 2 and formed of a substantially box-like body formed by combining curved surfaces. 3, an upper water tank 4 disposed above the heat exchange portion 11 of the cooling tower 10 and below the water distribution box 3, and facing the upward discharge port 2 a of the pipe 2 inside the water distribution box 3. And an adjusting valve 5 that adjusts the flow rate of the circulating water and is supported so as to be able to adjust the distance from the discharge port 2a.

The water distribution box 3 is formed of a smooth, substantially box-like body having a combination of curved surfaces, and has a configuration in which the water distribution box 3 expands toward an open lower side. On the inner surface of the water distribution box 3, a nonwoven sheet 3a made of a thick synthetic resin fiber is adhered as a porous material having water permeability, and the impingement of the circulating water spouting from below is weakened to flow downward. It is a mechanism to make it. Note that a sponge material, a mesh material, or the like can be used as the porous body provided inside the water distribution box 3.

The upper water tank 4 is a shallow box-shaped body formed of a dense, thick nonwoven board 4 a made of a synthetic resin fiber, which is a porous plate having a water-permeable bottom, and flows down from the water distribution box 3. The received circulating water is temporarily stored in a water tank, and the circulating water that has uniformly leaked from the bottom is dropped on the heat exchange portion 11.

The adjusting valve 5 includes a valve body 5 a formed of a smooth plate-like body having a combination of curved surfaces, a screw shaft 5 b screwed into the upper part of the water distribution box 3, and a valve body formed by screwing the screw shaft 5 b. And a handle 5c for raising and lowering 5a. The outer peripheral portion of the valve element 5a is smoothly inclined downward, that is, toward the upper water tank 4, so that the circulating water is deflected downward from the discharge port 2a of the pipe 2 along the valve element 5a and sent out. 3 will be smooth.

Next, the water distribution state in the cooling tower water distribution device based on the above configuration will be described. When the circulating water is sent into the cooling tower 10, the circulating water gushes out from the discharge port 2a at the tip of the pipe 2. The circulating water spouted from the discharge port 2a first strikes the valve element 5a of the regulating valve 5, and proceeds along the valve element 5 directly to the upper water tank 4 on the lower side, or is sprayed by the impact on the water distribution box. 3 Turn to the inside. The splash of the circulating water that has reached the inner surface of the water distribution box 3 is weakened by the nonwoven sheet 3a of fibers on the inner surface of the water distribution box 3, flows along the water distribution box 3, and is sent out to the upper water tank 4. Since the shape of the water distribution box 3 and the regulating valve 5 is a curved surface, the flow of circulating water is smooth and the generation of splashes is small, and the nonwoven sheet 3a of fibers inside the water distribution box 3 is flexible and porous. The efficiency of damping the circulating water is high, and the noise is low. The circulating water flowing down to the upper water tank 4 collects in the water tank while absorbing the impact again with the dense nonwoven board 4a of the fiber at the bottom, passes through the nonwoven board 4a at the bottom for a predetermined time, and exchanges heat from the bottom. 11 is dropped.

As described above, in the water distribution device for a cooling tower according to the present embodiment, it is possible to reduce the force with which the circulating water collides in the water distribution box 3 and reduce the scattering of droplets, thereby achieving a significant reduction in noise. In addition, the circulating water can be dripped onto the heat exchange portion 11 from the entire bottom surface of the nonwoven board 4a at the bottom of the upper water tank 4, and the heat exchange efficiency is improved as compared with the conventional case of dripping from a large number of small holes.

In the water distribution device for a cooling tower according to the embodiment, the circulating water is directly blown out from the discharge port 2 a of the pipe 2, but an air injection port is provided in the pipe 2. It is also possible to adopt a configuration in which air is sent from this air inlet to mix air bubbles into the circulating water and blow out as foam water from the outlet 2a, and the momentum at which the circulating water collides with the inner surface of the water distribution box 3 is generated by the air bubbles. In addition to being able to absorb, the scatter of the splash is reduced even after the collision, and the noise generated in the water distribution box 3 is further reduced.

In the water distribution device for a cooling tower according to the embodiment, a regulating valve 5 is provided inside the water distribution box 3, and a gap between the discharge port 2 a of the pipe 2 and the regulating valve 5 is changed. Although the configuration is such that the flow rate of the circulating water to be blown out is adjusted, the regulating valve 5 is omitted, and only the water distribution box 3 is used. The water distribution box 3 can be freely moved up and down with respect to the discharge port 2a. It is also possible to adjust the flow rate of the circulating water to be blown out by changing the gap size between the water supply box and the water distribution box 3. The distribution box 3 serves as a regulating valve for regulating the flow rate of the circulating water. Since the obstacles are eliminated, the flow in the water distribution box 3 can be made smoother and noise generation can be suppressed, and the amount of circulating water can be adjusted correctly with a simple configuration, and the number of parts can be reduced to reduce costs.

[0022]

[Effect of the invention]

 As described above, in the present invention, the inner surface of the distribution box to which the circulating water spouted from the discharge port of the pipe hits is formed with a curved surface, and a porous body having a predetermined thickness of water permeability is disposed inside the distribution box. By reducing the impact of the circulating water on the inner surface of the distribution box in each direction and reducing it, the noise generated by the collision between the circulating water and the distribution box can be reduced, and the cooling tower can be further quieted. To play. In addition, in the present invention, an air inlet is provided in the middle of the pipe, and bubbles are mixed into the circulating water and spouted out as foamed water to absorb the momentum at which the circulating water collides with the distribution box wall surface. At the same time, the droplets are less likely to be scattered after the collision, which has the effect of further reducing the generated noise. Also, in the present invention, the bottom of the upper water tank is formed of a porous porous body having a predetermined thickness and is permeable to circulating water, and the circulating water that exudes from the entire bottom is heated. By dropping the circulating water into the replacement part, the circulating water is not biased and the heat exchange can be performed efficiently, and the momentum of the splashing of the circulating water from the inner surface of the distribution box to the upper surface of the upper water tank can be absorbed. This has the effect that noise generation in the upper aquarium area can be suppressed to a low level. Also, in the present invention, a regulating valve having a curved surface is provided as an adjusting means, and even if the circulating water hits the regulating valve, the circulating water is smoothly deflected along the curved surface and proceeds, so that the circulating water is adjusted. The momentum of the collision with the regulating valve is deviated in each direction, and the noise can be reduced. In addition, in the present invention, the water distribution box is disposed so as to be movable up and down, and the gap between the water distribution box and the discharge port can be adjusted to adjust the flow rate of the circulating water. Adjustment can be performed correctly, manufacturing costs can be reduced, and since there is no obstacle in the distribution box as an adjustment means, the flow in the distribution box can be made smoother and noise can be suppressed.

[Brief description of the drawings]

FIG. 1A is a perspective view of a cooling tower water distribution device according to an embodiment of the present invention in a state where a cooling tower is provided. (B) is a schematic configuration diagram of a water distribution box of the cooling tower water distribution device according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the cooling tower water distribution device according to an embodiment of the present invention.

FIG. 3A is a schematic configuration diagram of a regulating valve of the water distribution device for a cooling tower according to an embodiment of the present invention. (B) is an explanatory view of a use state of the water distribution device for a cooling tower according to an embodiment of the present invention.

FIG. 4A is a perspective view of a conventional cooling tower water distribution device in a state where the cooling tower is provided. (B) is a schematic configuration diagram of a water distribution box of a conventional cooling tower water distribution device.

FIG. 5 is a longitudinal sectional view of a cooling tower using a conventional cooling tower water distribution device.

[Explanation of symbols]

 1, 100 Water distribution device for cooling tower 2, 101 Piping 2a, 101a Discharge port 3, 102 Water distribution box 3a Non-woven sheet 4, 103 Upper water tank 4a Non-woven board 5, 104 Regulator valve 5a Valve element 5b Screw shaft 5c Handle 10 Cooling Tower 11 heat exchange part

Claims (5)

[Utility model registration claims] 1. A pipe having a discharge port for guiding circulating water sent to a cooling tower to an upper side of a heat exchange portion and discharging the circulating water, and disposed around the discharge port of the pipe so as to cover the pipe. A substantially box-shaped water distribution box with an open lower side for receiving and flowing down the circulating water spouted from the outlet, and a box-shaped body having a number of holes at the bottom for allowing water to pass therethrough. And an upper water tank disposed below the water distribution box for storing circulating water flowing down from the water distribution box and dropping a predetermined amount of water to a heat exchange portion, and disposed opposite to a discharge port of the pipe to discharge water. In a cooling tower water distribution device, which is supported so as to be capable of adjusting the distance from the outlet and adjusts the flow rate of circulating water, an inner surface shape of the water distribution box is formed into a curved surface, and a predetermined thickness is formed inside the water distribution box. Characterized by disposing a porous body having water permeability却塔 for the water distribution system. 2. The water distribution device for a cooling tower according to claim 1, wherein an air injection port is provided upstream of a discharge port of the pipe, and circulating water spouted from the pipe contains bubbles. Water distribution device for cooling tower. 3. The water distribution device for a cooling tower according to claim 1, wherein the upper water tank has a bottom portion formed of a porous plate having a predetermined thickness and having water permeability, and a bottom surface for circulating water. A water distribution device for a cooling tower, characterized in that the water distribution device is oozed out and dropped. 4. A water distribution device for a cooling tower according to claim 1, wherein said adjusting means is disposed inside said water distribution box so as to be movable up and down opposite a discharge port. A water distribution device for a cooling tower, characterized in that the water distribution device is a regulating valve. 5. The water distribution device for a cooling tower according to claim 1, wherein the water distribution box is disposed so as to be vertically movable with respect to a discharge port of a pipe, and also serves as an adjusting means. A water distribution device for a cooling tower, wherein a flow rate of circulating water is adjusted by changing a gap between the cooling water and an outlet.