JP2022190697A - cooling tower - Google Patents

Abstract

To provide a cooling tower which can enhance the reliability of water spraying while securing the homogeneity of water spraying to a filling material, and can enhance the efficiency of work such as maintenance by having a water spray part for spraying water to a filling material as a fixed-type simple water spray mechanism.SOLUTION: A plurality of fixed-type water spray pipes 41 are arrayed in an upper part of a tower body 10 as a water spray part 40 for a filling material 20. A water distribution tank 30 having an atmospheric air release structure is arranged on an inlet side of the water spray pipe 41, and circulation water which has been once introduced into the water distribution tank 30 is made to flow into the water spray pipes 41 and water spraying to the filling material 20 is performed as a natural flow. Thus, supply of circulation water to the water spray pipes 41 from the water distribution tank 30 and water spraying from the water spray pipes 41 are nof affected by variations in a flow of circulation water which is made to flow back to a cooling tower. Even with the water spray pipes in a fixed state, circulation water can reach each part of a preset filling material to be water-sprayed.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present invention relates to a cooling tower that cools a circulating liquid-phase heat medium by exchanging heat with air in a heat exchange section, and more particularly to a small counterflow cooling tower.

In general, in a cooling tower installed outdoors for the purpose of cooling liquid-phase heat transfer media such as water that is circulated in factories and air conditioning equipment, the operation of the fan (blower) in the heat exchange section inside the cooling tower The cooling is performed by directly or indirectly exchanging heat between the air taken in from the outside (outside air) and the heat medium.

Among these, the small cooling tower sprinkles circulating water from the water sprinkling part above the packing material of the winding structure housed in the round tower body, and introduces outside air from below to exchange heat. It was often regarded as a countercurrent type device that allows the
An example of such a conventional counterflow type cooling tower is disclosed in Japanese Utility Model Laid-Open No. 6-55079.

Japanese Utility Model Laid-Open No. 6-55079

A conventional counterflow cooling tower has the configuration shown in the above patent document, and the water sprayed from the water sprinkling part and the outside air introduced from the suction port at the bottom of the tower body and directed upward are opposed to each other. Since the heat is exchanged as a flowing flow, the heat exchange efficiency has been relatively high, but in recent years, there is a demand for further improvement in efficiency.

However, conventional round cooling towers are structurally difficult to make further changes, and there is little room for improvement in terms of efficiency. In addition, due to the winding type filler structure, if you try to increase the cooling capacity, the amount of winding of the filler will increase, and the installation area will also increase, so there is a problem that the compact form cannot be maintained. rice field.

In addition, in conventional round cooling towers, the water sprinkling part is movable, so it is relatively easy for problems to occur. There was a problem that the efficiency of heat exchange was remarkably lowered.

Furthermore, the conventional round cooling tower has a structure in which FRP tower body parts in the shape of a round tower body divided vertically into two are connected and integrated with bolts. In order to perform maintenance inside the cooling tower, it was necessary to disconnect and disassemble the tower body, and there was a problem that workability was not good.

The present invention has been made in order to solve the above-mentioned problems, and the sprinkling part for sprinkling water to the filling material is a simple fixed water sprinkling mechanism, and the reliability of water sprinkling is ensured while ensuring the uniformity of water sprinkling to the filling material. It is an object of the present invention to provide a cooling tower capable of increasing the efficiency of work such as maintenance while increasing the efficiency of maintenance work.

In the cooling tower according to the present invention, the circulating water to be cooled is sprayed against the packing material in the cooling tower body, and the outside air is circulated upward from below the packing material by the induced draft by the fan, so that at least the packing material is in contact with the outside air. A counterflow type open cooling tower that exchanges heat with circulating water. A water distribution tank that is disposed on the upper side of the tower body and can temporarily store a predetermined amount of circulating water, and a plurality of watering pipes. are arranged in parallel in a direction orthogonal to the longitudinal direction of the pipe with the longitudinal direction of the pipe horizontal, and a water spraying portion arranged in a non-moving state above the filler, each watering pipe of the water spraying portion is communicatively connected at one end to the water distribution tank, and is provided with a plurality of holes in the lower part for naturally flowing down the circulating water that has flowed into the pipe from the water distribution tank, and the water distribution tank is A ventilation hole is provided to allow the inside of the water distribution tank to communicate with the outside of the water distribution tank, and the inside is exposed to the atmosphere through the ventilation hole.

As described above, according to the present invention, a plurality of fixed watering pipes are arranged at the upper part of the tower body as a watering part for the filling material, and a water distribution tank with an open-air structure is provided on the inlet side of the watering pipe, and once By letting the circulating water introduced into the water distribution tank flow into each watering pipe and watering the filler by gravity flow, the circulating water flows from the water distribution tank to each watering pipe and from the watering pipe. In sprinkling, it is not affected by fluctuations in the flow of circulating water returned to the cooling tower, and the distribution state of circulating water from the water distribution tank to each watering pipe can be maintained constant without fluctuation, and in a fixed state Even with the water-spraying pipe, the circulating water can stably reach each part of the filler to be watered which is set in advance, and the efficiency of heat exchange can be improved. In addition, by allowing circulating water to naturally flow down from the watering pipe that does not move, troubles related to watering are less likely to occur, and stable watering can be continued without difficulty, and maintenance of the watering part is also excellent.

Further, in the cooling tower according to the present invention, the one end of the water sprinkling pipe is detachably screwed to the water distribution tank to be connected as needed.

As described above, according to the present invention, one end of the watering pipe can be detachably screwed to the water distribution tank, and the watering pipe can be connected to the water distribution tank only by screwing the end of the pipe. As a result, by screwing the sprinkling pipe to the water distribution tank, it is possible to easily secure the communication state in which the circulating water flows, and to remove the sprinkling pipe from the water distribution tank without difficulty. Maintenance work such as pipe replacement can be performed smoothly, and workability is excellent.

Further, in the cooling tower according to the present invention, if necessary, the water sprinkling pipe is provided with a plurality of holes in the lower part arranged at predetermined intervals in the pipe longitudinal direction, and the size of the hole is adjusted from the water distribution tank. It is made smaller the further away it is.

Thus, according to the present invention, the plurality of holes in the lower part of the watering pipe are arranged at predetermined intervals in the longitudinal direction of the pipe, and the farther away from the water distribution tank, the smaller the size of the holes, thereby distributing water. By making the hole closer to the tank more likely to cause water to flow down, the momentum of the water when it flows from the water distribution tank to the water distribution pipe usually causes the water to flow away from the water distribution tank of the water distribution pipe. In contrast to the situation where water tends to flow down, it is possible to set the susceptibility of water to flow down depending on the size of the hole inversely to equalize the water flow down at each hole position of the water sprinkling pipe. As for the direction, the circulating water can be uniformly sprinkled over the filling material.

In addition, the cooling tower according to the present invention is detachably installed in the vicinity of the water pipe inside the tower body as necessary, and each water pipe is provided with a recess of a predetermined shape facing the water pipe. Each of the watering pipes has a projecting member integrally attached to a predetermined location in the middle of the pipe longitudinal direction where there is no hole, and the projecting member is engaged with the recess of the restricting member. , is in a non-rotatable state.

As described above, according to the present invention, the projecting member is integrated in the middle of the watering pipe in the longitudinal direction of the pipe, and water is sprayed to the concave portion of each watering pipe in the restraining member provided near the watering pipe in the tower. By engaging the projecting members of the water pipes and restraining the rotation of each watering pipe with a restraining member, the watering pipes are reliably held in a non-rotating state, thereby reducing the force from the air flowing through the tower body. The water pipe does not move unintentionally even if it is received, and the water pipe can be fixed and the circulating water can be sprayed. As a result, stable heat exchange can be continued without fluctuation. In addition, even if vibrations are applied during transportation for installation of the cooling tower before use, the watering pipe will not rotate due to vibration, and the connection between the watering pipe and the water distribution tank will not loosen or come off. This prevents the trouble of readjusting the watering pipe.

Further, in the cooling tower according to the present invention, if necessary, the sprinkler pipe is connected to a lower portion of the water distribution tank, and the water distribution tank connects the inlet portion of the circulating water to the connection position of the sprinkler pipe. It is provided as an arrangement that maximizes the distance from the

As described above, according to the present invention, the sprinkler pipe is connected to the lower part of the water distribution tank, and the inlet of the circulating water in the water distribution tank is separated from the connection position of the sprinkler pipe as far as possible. By preventing the flow of circulating water into the water distribution tank from affecting the inflow of water from the water distribution tank to the water pipes, A state in which water flows in evenly can be maintained, and circulating water can be evenly sprinkled from each watering pipe to the filling material.

Further, in the cooling tower according to the present invention, the water distribution tank is provided at a predetermined location where the vent hole is separated from the inlet of the circulating water, and the surplus water exceeding the hole position of the circulating water inside is provided in the cooling tower according to the need. It is also used as a hole for overflowing water.

As described above, according to the present invention, the vent hole for opening the inside of the water distribution tank to the atmosphere is provided at a location away from the inlet of the circulating water in the water distribution tank, and is used for overflowing the surplus circulating water. It is also used as an inflow state of circulating water that flows into each watering pipe by increasing the circulating water level in the water distribution tank by suppressing the excessive storage of circulating water in the water distribution tank. changes in water from each hole aligned in the longitudinal direction of the watering pipe, and the water from each watering pipe is properly distributed to the filler in the longitudinal direction of the pipe. be able to remain viable. In addition, the vent hole of the water distribution tank is provided at a location away from the inlet of the circulating water. By providing a By securing the normal water flow condition that directs the water to the sprinkler pipe after the target is stopped, the loss of circulating water can be suppressed and the efficiency of heat exchange can be prevented from decreasing.

In addition, in the cooling tower according to the present invention, if necessary, the side of the upper part of the tower body opposite to the side where the water distribution tank is located is provided with a large enough to allow an operator from outside the tower body to work at least on the water spray part. An opening portion is provided, and a cover portion capable of opening and closing the opening portion is provided.

Thus, according to the present invention, an opening is provided on the side opposite to the water distribution tank in the upper part of the tower body of the cooling tower. By performing work such as replacing the watering pipe for the watering part inside the body, the workability of the inside of the tower body such as maintenance of the watering part is improved, and maintenance of the watering part is performed appropriately. The state in which circulating water is normally sprinkled from the sprinkler can be maintained without any problem.

Further, in the cooling tower according to the present invention, if necessary, the cover part can be engaged with a part of each of the water spray pipes at the inner part facing the space in the tower body, and the opening part In the closed state, each watering pipe is engaged with a part of each watering pipe to hold each watering pipe in an unrotatable state, while in the open state, the watering pipe is separated from the watering pipe to release the engagement. is.

Thus, according to the present invention, when the cover covers and closes the opening on the side of the tower body, the inner portion of the cover engages with a part of each watering pipe to rotate each watering pipe. On the other hand, when the opening is opened by the cover, the engagement with each watering pipe is released so that the watering pipe can be moved. Each watering pipe can be held in a non-rotating state, and there is no particular need to perform work related to restraining each watering pipe. Workers can quickly carry out the work of handling the watering pipe through the opening of the watering pipe, improving work efficiency such as maintenance of the watering pipe, and each watering pipe properly fills the circulating water. You can easily ensure the condition of sprinkling water.

1 is a schematic perspective view of a cooling tower according to an embodiment of the invention; FIG. 1 is a front view of a cooling tower according to an embodiment of the invention; FIG. It is a top view of a cooling tower concerning one embodiment of the present invention. 1 is a side view of a cooling tower according to an embodiment of the invention; FIG. FIG. 4 is an explanatory diagram of a state of disposing a water sprinkler inside the tower body of the cooling tower according to the embodiment of the present invention; FIG. 4 is an explanatory view of a connection process by screwing a watering pipe to a water distribution tank in the cooling tower according to the embodiment of the present invention; FIG. 4 is a plan view of the essential parts of the water sprinkling pipe and the restraining member in the cooling tower according to the embodiment of the present invention; FIG. 8 is a cross-sectional view taken along the line AA of FIG. 7; FIG. 4 is an explanatory diagram of a watering state from a watering unit in the cooling tower according to one embodiment of the present invention; FIG. 10 is an explanatory diagram of a state of disposing a water sprinkler inside a tower body in a cooling tower according to another embodiment of the present invention; FIG. 11 is an exploded explanatory view of a connecting portion of a sprinkler pipe to a water distribution tank in a cooling tower according to another embodiment of the present invention; FIG. 10 is an explanatory diagram of a process of connecting a watering pipe to a water distribution tank in a cooling tower according to another embodiment of the present invention; FIG. 10 is an explanatory diagram of an arrangement state of water sprinkler pipes and restraint bars in a cooling tower according to another embodiment of the present invention; FIG. 10 is an explanatory view of the inner surface side structure of the outer skin of the tower body in the cooling tower according to another embodiment of the present invention;

A cooling tower according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 9. FIG. In this embodiment, as a counterflow type (counterflow type), a small cooling tower is provided with a water sprinkler on the upper side and an air suction port on the lower side with a filler provided below the blower for induced draft. An example of

As shown in the above figures, the cooling tower 1 according to the present embodiment includes a tower body 10 for passing circulating water as a heat medium and external air inside, and a contact for heat exchange between the circulating water and air. a water distribution tank 30 disposed on the upper side surface of the tower body 10 and capable of temporarily storing the circulating water; is supplied, and the water sprinkler 40 for distributing and dripping this circulating water to each part of the filling material 20, the lower water tank 50 disposed below the filling material 20 and collecting the circulating water that has passed through the filling material 20, and the tower body 10 and an air blower 70 which is disposed on the upper portion of the filler 20 and allows outside air to flow between the filler sheets 21 of the filler 20 by induced draft.

The tower body 10 has a hollow cylindrical shape with a square or rectangular cross section, and is provided with an intake port 11 for outside air at the bottom and an exhaust port 12 for discharging the outside air after heat exchange in the tower body at the top. It is a configuration that can be used.
The tower body 10 is formed, for example, by combining metal frame materials (columns and beams) and FRP outer plates.

An opening 13 for working with the water sprinkler 40 is provided on the side opposite to the side on which the water distribution tank 30 is located in the upper part of the tower body 10 . The opening 13 has a size that allows an operator to perform maintenance work on the sprinkler section 40 from the outside of the tower body 10 .
Further, a lid-like cover portion 15 that enables opening and closing of the opening portion 13 is detachably disposed on the tower body 10 .

In addition, the cover part may be formed in a door shape connected to the side surface of the tower body 10 so that the opening part 13 can be opened and closed without being removed from the tower body 10 . In this case, it goes without saying that the cover portion is positioned at a location where at least the operator can work on the water spraying portion 40 without hindrance while the opening portion 13 is open.
In addition, a restraining member 17 for restraining a plurality of watering pipes 41 forming the watering section 40 is detachably disposed above the watering section 40 inside the tower body 10 .

The filling material 20 is formed by integrating a large number of substantially rectangular plate-shaped filling material sheets 21 in a laminated state. It is a configuration in which a single stage or a plurality of stages are stacked vertically.

This filling material 20 is arranged below the blower 70 and the sprinkler unit 40 and above the outside air suction port 11 at the bottom of the tower body, and circulating water is dripped from above and outside air passes from below to above. The heat exchange between the circulating water and the air is mainly performed between the filler sheets 21 .

The water distribution tank 30 is formed of a thin box-shaped body and is disposed on the upper side of the tower body 10 above the position where the packing material 20 is located. Circulating water is supplied through a circulation line 90 leading to a machine, an air conditioner, etc., and a predetermined amount of the circulating water can be temporarily stored.

The water distribution tank 30 is connected to one end of each watering pipe 41 forming a watering part 40 at its lower part, and communicates with these watering pipes 41 to distribute the stored circulating water to each watering pipe 41. It is configured to flow in.

In addition, the water distribution tank 30 is arranged such that the inlet portion 31 of the circulating water is separated from the connection position of the water spray pipe 41 as much as possible. Specifically, the circulating water inlet 31 in the water distribution tank 30 is provided above the center of the tank so as to be as far away as possible from the connecting position of the sprinkler pipe 41 in the lower portion. In addition, the inlet portion 31 is provided with a diameter as large as possible.

Furthermore, the water distribution tank 30 is provided with a vent hole 32 that communicates the inside of the tank with the outside of the tank (the space inside the tower), and the inside is opened to the atmosphere through the vent hole 32 . Ventilation holes 32 for communicating the inside of the tank with the outside are provided at predetermined locations separated from the circulating water inlet 31 at the center of the tank, specifically, at both ends in the longitudinal direction of the tank (sprinkling pipes). 41 parallel direction end). This vent hole 32 is also used for the purpose of overflowing the surplus amount of the internal circulating water that exceeds this hole position.

The water sprinkling part 40 is formed by arranging a plurality of water sprinkling pipes 41 in parallel in a direction perpendicular to the longitudinal direction of the pipes so that the longitudinal direction of the pipes is horizontal, and is arranged above the filling material 20 in a stationary state. It is a configuration that is
Each watering pipe 41 of the watering part 40 is connected to the water distribution tank 30 by detachably screwing one end thereof.

Each water sprinkling pipe 41 is provided with a plurality of holes 42 in its lower part, receives the supply of circulating water in the water distribution tank from one end communicating with the water distribution tank 30, and circulates the water flowing into the pipe. It will flow down naturally from the hole 42 of the lower part.
A plurality of holes 42 in the lower part of the sprinkler pipe 41 are arranged at predetermined intervals in the longitudinal direction of the pipe, and the size of the holes is made smaller as the distance from the water distribution tank 30 increases.

Further, the watering pipe 41 is integrally attached with a projecting member 43 projecting upwards at a predetermined position on the upper portion where there is no hole 42 in the middle of the pipe in the longitudinal direction. The projecting member 43 is, for example, a member having a predetermined length and a substantially L-shaped cross section, which is attached to the upper portion of the outer peripheral surface of the sprinkler pipe 41 by adhesion or welding and fixed integrally.

A restraining member 17 disposed inside the tower body 10 engages with the projecting member 43 of each watering pipe 41 from above.
Specifically, the restraining member 17 is configured such that a recess 17 a having a predetermined shape facing the watering pipe 41 is provided for each watering pipe 41 .
Each watering pipe 41 has a structure in which the integrated projecting member 43 is engaged with the recessed portion 17a of the restraining member 17 so as to be in a non-rotatably restrained state.

The lower water tank 50 is disposed on a support frame 51 connected to the lower part of the tower body 10, and receives the circulating water that has flowed down and temporarily stores and recovers the water.
In the lower water tank 50, the delivery side end of the circulation pipe 90 leading to the refrigerator, the air conditioner, etc., and the water supply part (not shown) of supplementary water supplied when the circulating water decreases are connected respectively. The configuration and the configuration in which a strainer (not shown) that captures foreign matter such as scale and allows only water to pass through is provided at the outlet of the circulating water proceeding to the circulation pipe 90 is the same as the known lower water tank of the cooling tower. and detailed description thereof is omitted.

In addition, in the lower water tank 50, a sheet body (not shown) made of a porous material is disposed near the surface of the temporarily stored circulating water. The water passing through the filling material 20 and flowing down to the lower water tank 50 once comes into contact with the sheet body, thereby suppressing noise generated when the water directly falls on the water surface of the lower water tank 50.例文帳に追加

The blower 70 is arranged at the top of the tower body 10, and the outside air introduced from the suction port 11 by induced draft is passed from below to the filling material 20 located below, and the filling material 30 is directed upward. The passing air is blown upward and discharged out of the cooling tower.

This blower 70, like those used in known small cooling towers, directly transmits the driving force of an electric motor 75 to an impeller 71 connected thereto, thereby rotating the impeller 71 and blowing the air in the tower body. It is a mechanism that can discharge outside the tower body and perform induced draft.

Next, the operating state of the cooling tower based on the above configuration will be described.
Circulating water as a heat medium flowing through the circulation pipeline 90 including the cooling tower 1 is, like a known cooling tower, under normal operating conditions of the cooling tower, refrigerators and air conditioners in the path of the circulation pipeline 90. etc., heat is received, the temperature is raised, and it reaches the cooling tower 1. The circulating water returned to the cooling tower 1 is first introduced into the water distribution tank 30 on the side of the tower body 10 of the cooling tower 1 through the inlet 31 and temporarily stored in the water distribution tank 30. .

The water distribution tank 30 is provided with a vent hole 32 through which surplus circulating water overflows. case can occur. However, these vents 32 are provided at this longitudinal end of the water distribution tank 30, which is long in the parallel direction of the watering pipes 41, and are distant from the inlet 31 at the center of the tank. Even if the circulating water that has flowed into the tank 31 goes toward the top of the tank with the momentum of the inflow, the circulating water does not reach the top of the end of the tank where the vent hole 32 is located, and the circulating water that has flowed into the tank flows into the sprinkler part 40. It is possible to prevent the situation where the water flows out from the vent hole 32 of the water distribution tank 30 without going.

The circulating water introduced into the water distribution tank 30 stays in the water distribution tank 30 for a predetermined time as the inside of the water distribution tank 30 is opened to the atmosphere through the vent hole 32, and then is connected to the lower part of the tank. It flows into one end of each watering pipe 41 of the watering part 40 . Then, the circulating water reaches the holes 42 at the bottom while heading toward the other end of the watering pipe 41, and naturally flows down through these holes 42, thereby filling the filling material 20 below the watering part 40. Water will be sprayed on each part.

While each water sprinkling pipe 41 directing the circulating water toward the filling material 20 is connected to the lower part of the water distribution tank 30, the inlet part 31 of the circulating water in the water distribution tank 30 is separated from the tank lower part as much as possible and the tank upper part By providing the water spray pipes 41 closer to each other, the water spray pipes 41 are less likely to be affected by the flow of the circulating water when it flows into the inlet portion 31 . For example, due to the momentum of the flow of circulating water when it flows into the inlet 31, the circulating water entrains air into some of the watering pipes 41, and the circulating water is distributed to the watering pipes 41. It is possible to prevent unevenness from occurring, stabilize the flow of circulating water into each watering pipe 41 , and evenly distribute the circulating water to each watering pipe 41 .

The circulating water that is sprayed from each watering pipe 41 of the water spraying part 40 and reaches the filling material 20 advances to each gap between the filling material sheets 21 forming the filling material 20 and flows down along the filling material sheets 21. It comes into contact with the external air that is introduced upward to the filler 20 by the induced draft by the blower 70 . The circulating water is cooled mainly by the cooling effect due to the heat transfer (sensible heat) associated with the temperature difference between the air and the circulating water, and the cooling effect due to the evaporation heat (latent heat) of the circulating water. This will raise the temperature.

In this way, the circulating water is cooled through heat exchange with the air in the filler 20, then leaves the filler 20, reaches the lower water tank 50, and is collected. The circulating water collected and accumulated in the lower water tank 50 passes through the strainer at the outlet of the lower water tank and then re-enters the circulation pipe 90. After returning to the cooling tower 1 and being introduced into the inlet 31 of the water distribution tank 30, the above process is repeated.

On the other hand, the air whose temperature has been raised by exchanging heat with the circulating water passes upward through the gaps between the filler sheets 21 forming the filler 20 by being drawn by the blower 70 . The air that has passed between the filler sheets 21 and exited from the filler 20 is discharged outside the cooling tower by the blower 70, and the discharged air diffuses into the outside air.

While the cooling tower is in operation, each watering pipe 41 of the watering part is connected at one end to the water distribution tank 30, and held at a predetermined point in the middle in the longitudinal direction by the restraining member 17 so as not to move. is maintained, there is no possibility that the movable part will stop, and the state of water spraying from the circulating water sprinkling pipe 41 will not change over a long period of time, and the circulating water will continue to flow through heat exchange with the air. Cooling can be stabilized.

In addition, when maintenance is required due to aged deterioration of the watering pipe 41 of the watering part 40, the cover part 15 on the upper side of the tower body 10 on the side opposite to the water distribution tank 30 is removed from the tower body 10. By removing it, the opening 13 is opened so that the operator can work on each watering pipe 41 from the outside of the cylinder through the opening 13 .

When it is necessary to move the watering pipes 41 for maintenance work or the like, the operator removes the detachable restraining member 17 and engages the convex member 43 of each watering pipe 41 with the concave portion 17a of the restraining member 17. After resolving the conflict, the work will proceed. Even if the sprinkler pipe 41 connected to the water distribution tank 30 needs to be replaced, the connection between the sprinkler pipe 41 and the water distribution tank 30 is achieved by screwing the end of the pipe to the tank. The work related to the replacement of the watering pipe 41 can be done only by screwing the watering pipe 41 to remove it (see FIG. 6), and the work inside the tower body can be carried out easily and efficiently.

As described above, in the cooling tower according to the present embodiment, a plurality of fixed watering pipes 41 are arranged as the watering part 40 for the filler 20 in the upper part of the tower body 10, and the inlet side of the watering pipe 41 is open to the atmosphere. A water distribution tank 30 having a structure is provided, and the circulating water once introduced into the water distribution tank 30 is allowed to flow into each watering pipe 41, and the filling material 20 is watered by gravity. Even if the sprinkler pipe 41 does not move, the circulated water can be evenly distributed and sprinkled to each part of the filler 20, and the efficiency of heat exchange can be improved. In addition, by allowing circulating water to naturally flow down from the watering pipe that does not move, troubles related to watering are less likely to occur, and stable watering can be continued without difficulty, and maintenance of the watering part is also excellent.

In addition, in the cooling tower according to the above embodiment, an opening 13 is provided in a part of the side surface of the tower body 10, and a cover part 15 for opening and closing the opening 13 is detachable from the tower body 10. However, not limited to this, the entire side of the tower body 10 opposite to the side where the water distribution tank 30 is located has a structure that can be removed from other parts of the tower body 10 or a structure that can be opened like a door. may be removed or opened to create an opening leading to the inside of the tower body, through which the operator can handle the sprinkler unit 40 from outside the tower body. In addition, it is necessary to provide an opening that allows access to the inside of the tower body while maintaining the structure of the tower body, for reasons such as disassembling the tower body once before handling the sprinkler part inside the tower body. If not, it is possible to adopt a configuration in which no opening is provided on the side surface of the tower body and no cover is provided to enable the opening to be opened and closed.

In addition, in the cooling tower according to the above-described embodiment, the cover part 15 that is detachable from the tower body 10 is configured to open and close the opening part 13 for work provided in the upper part of the tower body. In addition, the cover portion, which also serves as the restraining member, can be engaged with a projecting member 43 integrated with each watering pipe 41 at the inner portion thereof facing the space in the tower body. When the opening 13 is closed, it engages with the projecting member 43 of each watering pipe 41 to hold each watering pipe in a non-rotating state. It is also possible to disengage the projecting member 43 and move the watering pipe 41 to a movable state.

In this case, each watering pipe 41 can be held in an immobile state only by closing the opening 13 with the cover, and there is no particular need to perform work related to supporting each watering pipe 41. 13 is opened, the worker can quickly perform the work of handling the watering pipes 41 through the openings 13 for the watering pipes 41 that have already moved to the movable state, and maintenance of the watering pipes 41 can be performed. The work efficiency can be improved, and the state in which each watering pipe 41 appropriately waters the filling material 20 with the circulating water can be easily ensured.

In addition, in the cooling tower according to the above-described embodiment, one end of each watering pipe 41 of the watering part 40 is connected to the water distribution tank 30 by detachably screwing it. In addition, as shown in FIGS. 10 to 12, one end of each watering pipe 45 of the watering section 40 is attached to a water sending projection 46 provided in the water distribution tank 30. A detachable connection can also be made by engaging the end of the watering pipe 45 so that the watering pipe 46 is relatively inserted into the watering pipe.

More specifically, a tubular body 47 made of an elastic material forming a projecting portion 46 for delivery projects partly outward from the hole provided at the bottom of the water distribution tank 30 as a connection position for the watering pipe 45. It is pre-mounted in such a way that it is positioned so as to allow it to fit and is not easily dislodged from the hole. The watering pipe 45 is pushed so that the projecting portion of the tubular body 47 toward the outside of the tank is relatively inserted into the watering pipe 45 , and the end of the pipe is positioned around the tubular body 47 . When the tubular body 47 is engaged, the sprinkler pipe 45 communicates with the water distribution tank 30 through the delivery projecting portion 46, and a state in which the sprinkler pipe 45 is connected to the water distribution tank 30 is obtained. On the other hand, when the watering pipe 45 is pulled away from the water distribution tank 30 from this connected state, the tubular body 47 is relatively removed from the watering pipe 45, thereby connecting the watering pipe 45 and the water distribution tank 30. state is released.

The outer peripheral portion of the tubular body 47 forming the delivery projecting portion 46 can be inserted into the sprinkler pipe 45 while being elastically deformed. The structure is such that it is difficult to come off from 45. A hard pipe member 48 is inserted inside the tubular body 47, and maintains the shape of the elastic tubular body 47, so that when the tubular body 47 receives an external force such as when the pipe for sprinkling is connected, This prevents excessive deformation and separation from the water distribution tank 30. - 特許庁

Further, in the cooling tower according to the above-described embodiment, the watering pipe 41 is integrally attached with a projecting member 43 projecting upward at a predetermined upper portion in the middle of the pipe in the longitudinal direction. On the other hand, by engaging the constraining member 17 disposed inside the tower body 10 with the projecting member 43 of each watering pipe 41 from above, each watering pipe 41 is constrained by the constraining member 17 so as not to rotate. However, as shown in FIG. 13 , each watering pipe 45 is connected to a restraining bar 18 that continues in the parallel direction of the watering pipe 45 with bolts and nuts, and the restraining bar 18 By attaching both ends of the pipes 45 to the base portion 16 disposed inside the tower body 10, each watering pipe 45 can be constrained.

The water pipe 45 is provided with a through hole for a bolt, and by connecting the water pipe 45 to the restraining bar 18 with a bolt and nut passed through the hole, the water pipe 45 is displaced from the restraining bar 18. A hard and reliable fixed state can be obtained, and drop-off of the water spray pipe 45 during transportation of the cooling tower can be prevented. Even when the watering pipe 45 is connected to the restraint bar 18, air can flow inside and outside the pipe through part of the bolt through-holes provided in the watering pipe 45. It can be used as an air vent from 45. When water enters the water pipe 45 from the water distribution tank 30, the air in the pipe is released to the outside of the pipe through the through hole, so that the water can smoothly flow into the water pipe 45 and water. can proceed without delay.
In the case where the connection of the watering pipes 45 is configured using the above-described delivery protrusions 46, each watering pipe 45 integrated with the restraining bar 18 by connection is attached to each delivery protrusion 46. On the other hand, it is possible to connect and disconnect each watering pipe 45 to the water distribution tank 30 at once by pushing or pulling them all together.

In the cooling tower according to the above-described embodiment, the tower body 10 is formed by combining a frame member and an outer plate, and air and water pass vertically between the filler sheets 21 of the filler 20 provided in the tower body. In order to make this possible, the inside of the tower body is isolated from the outside, but it is structured so that it does not have any special function related to the movement of air or water. By adopting a specific arrangement structure for the filling material, such as stacking multiple layers in the vertical direction and arranging the stacking direction of the filling material sheet differently for each overlapping layer, the tower body A gap is created between the outer plate of 10 and the filler, and as air and water pass through such a gap, the amount of air and water passing through the filler decreases, which may reduce the heat exchange performance. In response to the occurrence of such a gap, it is also possible to fill such a gap by changing the structure of the outer plate so that the air or water is not directed to the gap but directed to the filler.
Specifically, as shown in FIG. 14, the outer plate 19 of the tower body 10 facing the filling material has one or more gaps between the outer plate 19 and the filling material. A rib 19a protruding from the outer plate 19 is formed to fill the gap between the outer plate 19 and the filler. The ribs 19a are formed on the inner surface of the outer plate 19 continuously in a direction parallel to the continuous direction of the filler sheet facing the gap, and also serve to reinforce the outer plate 19 and prevent deformation due to external force. ing.
Thus, even if there is a gap between the outer plate 19 and the filler, the rib 19a projecting from the inner surface of the outer plate fills the gap between the outer plate 19 and the filler, allowing air and water to pass through the gap. By making it impossible to pass through, the heat exchange performance can be secured by the amount that air and water can pass through the filler instead of the gap.

Reference Signs List 1 cooling tower 10 tower body 11 inlet 12 outlet 13 opening 15 cover 16 base 17 restraint member 17a recess 18 restraint bar 19 outer plate 19a rib 20 filler 21 filler sheet 30 water distribution tank 31 inlet 32 Venting hole 40 Sprinkling part 41, 45 Sprinkling pipe 42 Hole 43 Protruding member 46 Sending protrusion 47 Tubular body 48 Pipe member 50 Lower water tank 51 Supporting frame 70 Blower 71 Impeller 75 Electric motor 90 Circulation pipeline

Claims (8)

While the circulating water to be cooled is sprayed against the packing material in the cooling tower body, outside air is circulated upward from below the packing material by induced draft by a fan, and at least the packing material exchanges heat between the outside air and the circulating water. In a counterflow open cooling tower,
a water distribution tank disposed on the upper side surface of the tower body and capable of temporarily storing a predetermined amount of circulating water;
a plurality of sprinkler pipes arranged in parallel in a direction orthogonal to the longitudinal direction of the pipes with the longitudinal direction of the pipes set horizontally, and a sprinkler portion arranged in a non-moving state above the filler;
Each watering pipe of the watering part has one end communicably connected to the water distribution tank, and a plurality of holes are provided at the bottom for naturally flowing circulating water flowing into the pipe from the water distribution tank. be
A cooling tower, wherein the water distribution tank is provided with a ventilation hole that communicates the inside of the water distribution tank with the outside of the water distribution tank, and the inside is opened to the atmosphere through the ventilation hole. In the cooling tower according to claim 1,
The cooling tower, wherein the water spray pipe is connected to the water distribution tank by detachably screwing the one end thereof. In the cooling tower according to claim 1,
A cooling tower, wherein the water sprinkling pipe has a plurality of holes arranged at predetermined intervals in the longitudinal direction of the pipe, and the size of the holes decreases with increasing distance from the water distribution tank. In the cooling tower according to claim 1,
A restraining member is detachably disposed in the vicinity of the watering pipe inside the tower body, and has a concave portion of a predetermined shape facing the watering pipe for each watering pipe,
Each water sprinkling pipe has a projecting member integrally attached to a predetermined position without the hole in the middle of the pipe in the longitudinal direction, and the projecting member is engaged with the recess of the restraining member to be non-rotatably restrained. A cooling tower characterized in that it is in a In the cooling tower according to claim 1,
the watering pipe is connected to a lower portion of the water distribution tank;
The cooling tower, wherein the water distribution tank is arranged such that the inlet of the circulating water is separated as far as possible from the connecting position of the water sprinkling pipe. In the cooling tower according to claim 1,
The water distribution tank is characterized in that the vent hole is provided at a predetermined position separated from the inlet of the circulating water, and is also used as a hole for overflowing the surplus water exceeding the position of the circulating water hole inside. cooling tower. In the cooling tower according to claim 1,
On the side of the upper part of the tower body opposite to the side where the water distribution tank is located, an opening having a size that allows a worker to at least work on the sprinkler part from the outside of the tower body is provided, and the opening is opened. A cooling tower comprising an openable and closable cover. In the cooling tower according to claim 7,
The cover part can be engaged with a part of each watering pipe at an inner part facing the space in the tower body, and can be engaged with a part of each watering pipe when the opening is closed. and holding each watering pipe in a non-rotatable state, while disengaging each watering pipe by separating from each watering pipe when the opening is open.

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