JP2004012034A - Heat exchanger for cooling tower and cooling tower equipped with the heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce assembly time, labor and manufacture cost by minimizing the number of parts of an enclosed heat exchanger for a cooling tower and by eliminating, in the assembly thereof, a work for spot welding tube spacer receptors onto side plates and a work for bolting the side plate on a frame of the cooling tower. <P>SOLUTION: In a heat exchanger A, curved portions 12 of an enclosed heat exchange unit 16 are assembled on respective tube spacers 40, an engaging jaw 32 on each side plate 30 is supported by a supporting jaw 22 protruding from a circumference of a pipe of a post 20, and a flange 46, that is formed on an opening end of each tube spacer 40 stretching vertically, slides and engages from longitudinal direction into a supporting groove 34 that is formed inner surface of each side plate 30. The heat exchanger A is loaded into a cooling tower B to be used. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat exchanger for a cooling tower and a cooling tower provided with the heat exchanger.
[0002]
[Prior art]
Many types of heat exchangers for cooling towers of this type have been developed and manufactured, and the applicant manufactures a closed heat exchanger having the following structure.
As shown in FIG. 11, the heat exchanger for a cooling tower connects a straight pipe 2 with a U-shaped pipe 3 having a U-shaped curved portion, and manufactures a cooling coil forming a circulating cooling water channel meandering in a plane direction. Prior to brazing the ends of the straight pipes 2 adjacent to each other with the U-shaped pipe 3, pipe spacers 4 having a U-shaped cross section are temporarily passed through the pipes 2 as spacers. Is brought to the center of the group of pipes 2 and the ends of the adjacent pipes 2 are brazed 5 with the U-shaped pipe 3 to avoid thermal deformation of the pipe spacer 4 during brazing work. I have.
The tube spacer 4 brazed in this manner is received on the inner surface of each side plate (not shown) 5 by a receiving portion 6 comprising a substantially U-shaped channel (mold) for accommodating and holding the tube spacer 4. Are spot-welded with their openings 8 facing inward, and the tube spacers 4 of the hermetically sealed heat exchanger face each other in each receiving portion 6 and slide in the longitudinal direction along the flow direction of the outside air. After being movably inserted, a pair of side plates are bolted to a frame (not shown) of the cooling tower, and the heat exchanger is attached to the cooling tower.
[0003]
[Problems to be solved by the invention]
The cooling tower closed type heat exchanger has a large number of parts, and in the assembly thereof, the receiving portion is side-spot-welded to the side plate and the side plate is bolted to the frame of the cooling tower. It tends to be expensive.
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by improving a simple structure, and to provide a heat exchanger for a cooling tower in which a heat exchanger can be easily assembled to a cooling tower.
Another object of the present invention is to solve the above-mentioned problem by improving a simple structure, and to provide a heat exchanger for a cooling tower in which heat exchangers can be easily connected in the vertical direction to the market.
Another object of the present invention is to solve the above-mentioned problem by improving a simple structure, and to provide a cooling tower to which a heat exchanger can be easily assembled and which can exhibit a desired heat exchange ability on the market.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, pipes are connected at curved portions between a pair of vertical side plates which can be arranged to face both sides of the outside air intake of the cooling tower via electrically insulating pipe spacers, respectively, in a plane direction. In a cooling tower heat exchanger, a plurality of hermetically sealed heat exchangers for cooling towers comprising cooling coils forming a circulating cooling water passage meandering are arranged at intervals vertically.
The pipe spacer has a length corresponding to the depth dimension of the heat exchanger, and long holes into which the respective curved portions in the heat exchanger can be inserted are formed at intervals, and the pipe spacers are formed from the long holes. A ring-like stopper for stopping the curved portion protruding toward the side plate from coming off from the elongated hole is engaged with and fixed to the outer periphery of the apex portion of at least two curved portions for each pipe spacer for each of the meandering cooling coils. A plurality of the heat exchangers are supported and piped between a pair of pipe spacers that can be arranged at intervals in the width direction of the outside air intake of the cooling tower,
Each of the tube spacers is slidable with respect to each of the side plates along the longitudinal direction thereof and is detachably provided, and the side plates are capable of engaging with the columns of the cooling tower. There is.
[0005]
In order to achieve the above object, it is preferable that the tube spacer in the heat exchanger for a cooling tower of the present invention is made of a synthetic resin, and each of the curved portions is made of metal.
[0006]
In order to achieve the above object, at least three heat exchangers are detachably connected to the one-to-one pair of side plates in the heat exchanger for a cooling tower of the present invention via the pipe spacer. It is desirable.
[0007]
In order to achieve the above object, in the heat exchanger for a cooling tower according to the present invention, each of the tube spacers is formed as a trapezoidal or rectangular channel-type extruded product having a cross-section side, and is engaged with a pair of edges of each of the tube spacers. In some cases, flanges are provided, and these engaging flanges can be slidably engaged with the support grooves provided on the inner surface of the side plate in the longitudinal direction and are detachably provided.
[0008]
In order to achieve the above object, in the heat exchanger for a cooling tower of the present invention, each of the side plates is a shaped extruded product made of synthetic resin, and an outer surface of each of the side plates has a dovetail groove for engaging with the support. A dovetail-shaped or a pair of upper and lower hook-shaped engaging jaws extend in the horizontal direction and are integrally formed hierarchically, and each side plate is slidably engaged with a supporting jaw provided on a column by these engaging jaws. It is preferable that it is possible and that it is detachably provided.
[0009]
In order to achieve the above object, in the heat exchanger for a cooling tower of the present invention, the side plate is formed integrally with upper and lower ends thereof with a connector connecting the side plates vertically adjacent to each other, and the side plate is provided with the connector. It is preferable that a plurality of the heat exchangers are sequentially connected to each other in the upper and lower directions, and the heat exchangers are arranged in multiple stages, and are disposed on these side plates via the tube spacer.
[0010]
In order to achieve the above object, in the heat exchanger for a cooling tower according to the present invention, the stopper comprises a ring-like band made of an elastic synthetic resin, and surrounds at least 周 or more of the curved pipe. Is preferably fixed.
[0011]
In order to achieve the above object, the elastic synthetic resin band in the cooling tower heat exchanger of the present invention may be used as a binding band.
[0012]
In order to achieve the above object, the stopper in the heat exchanger for a cooling tower according to the present invention may be made of a synthetic resin string which is easily deformed by torsion and plastic deformation.
[0013]
In order to achieve the above object, in the cooling tower heat exchanger of the present invention, in a state where the stopper is attached to the curved portion, the outer diameter of the stopper is preferably slightly larger than the minor diameter of the long hole. .
[0014]
In order to achieve the above object, a related invention relates to a heat exchanger according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, which is attached to and detached from a column of a cooling tower via the side plate. The cooling tower is assembled as possible, and the heat exchanger is mounted below the watering device of the cooling tower.
[0015]
In order to achieve the above object, the column of the cooling tower is made of a square pipe or a square C-shaped member, and upward and downward supporting jaws are formed by projecting from the peripheral surface of the pipe, and each supporting jaw is formed. It is preferable that a hooking jaw formed on the side plate is slidably attached and detached from a longitudinal direction thereof.
In order to achieve the above object, the column of the cooling tower is formed of a U-shaped pipe, and is attached to an opening of the U-shaped pipe. It is preferable that a hooking jaw formed on the side plate is mounted on each supporting jaw so as to be freely slid and hooked from the longitudinal direction thereof.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1
In this embodiment, a typical embodiment of the heat exchanger according to the first to seventh and tenth aspects will be described together with a typical embodiment of the cooling tower according to the eleventh, twelfth and thirteenth aspects. .
1, 2, 3, 4, 5, and 6, A is a cooling coil that connects a straight pipe 10 with a curved portion 12 formed of a U-shaped tube to form a circulating cooling water passage meandering in a plane direction. 14 is formed, while an electrically insulating tube is provided between a pair of vertical side plates 30 which can be arranged opposite to both sides of the outside air intake of the cooling tower B. A heat exchanger for a cooling tower in which the heat exchangers 16 are horizontally spaced from each other via a spacer 40 is shown.
The tube spacer 40 is formed of an extruded product made of a synthetic resin, and has a cross-sectional shape formed of a square C shape or a sideways trapezoidal C shape. The length thereof is the depth when the heat exchanger 16 is mounted on the cooling tower. Elongated holes 42 corresponding to the dimension L (see FIG. 2) into which the curved portions 12 of the heat exchangers 16 can be inserted are formed in the tube spacer 40 at intervals so as to correspond to the pitch of the curved portions 12. In order to prevent the curved portion 12 protruding from the long hole 42 toward the side plate 30 from coming off from the long hole 42, a ring-like stopper 50 is provided for each of the meandering cooling coils 14 by each pipe spacer 40. A pair of pipe spacers which are hung around the apexes of at least two curved portions 12 and are fixed so that a plurality of the heat exchangers 16 can be arranged on both side walls of the outside air intake of the cooling tower A. Support between 40 To have been a pipe.
The tube spacers 40 are slidable in the longitudinal direction with respect to the side plates 30 and are detachably provided. The side plates 30 are detachable from the columns 20 of the cooling tower B.
[0017]
The tube spacer 40 is made of vinyl chloride, which is a kind of synthetic resin having electrical insulation, and the curved portions 12 are made of copper, which is a kind of metal. The tube spacer 40 is not limited to the vinyl chloride, but may be a polyolefin-based synthetic resin such as polyethylene or polypropylene.
[0018]
At least three hermetic heat exchangers 16 are detachably connected to the side plate 30 via the tube spacer 40.
[0019]
Each of the tube spacers 40 is an extruded product of a square C-shaped channel with a trapezoidal cross section, and the opening 44 of each of the tube spacers 40 corresponding to the base of the trapezoid is disposed outward. A flange 46 is formed in the opening 44, and the flange 46 is provided on the side plate 30 so as to be slidable with respect to each side plate 30 in its longitudinal direction and detachably.
[0020]
In the present embodiment, each side plate 30 is a synthetic resin molded extruded product. On the outer surface of each side plate 30, a pair of engaging jaws 32 to the support column 20 is provided, and a pair of the jaws 32 is spaced vertically. And is formed so as to be hierarchical and integral with each other. The inner surface of each of the side plates 30 corresponds to the engaging jaws 32 of each of the sets, and projects vertically from the open end of each of the tube spacers 40. The flanges 46 formed as described above are slidable and engageable with each other, and the support grooves 34 are integrally formed at intervals in the vertical direction of the side plates 30. The position of the support groove 34 on the inner surface of the side plate 30 and the position of the engaging jaw 32 on the outer surface do not necessarily have to correspond one-to-one. That is, as long as the number of the hooking jaws 32 is supported by the columns, there are no differences between the upper and lower two or three in the present invention.
[0021]
Male and female connectors 36 and 38 are integrally formed at the upper and lower ends of the side plate 30. A plurality of the side plates 30 are sequentially connected vertically, and the three heat exchangers 16 are vertically spaced. These side plates 30 are arranged via the tube spacer 40. The water sprayed to the heat exchanger 16 by the connectors 36 and 38 leaks outside the seam of the upper and lower side plates 30 so that the steel material such as the support 20 is not corroded.
[0022]
The stopper 50 is made of an elastic synthetic resin ring-like band, and is fixed so as to surround at least ／ of the pipe of the curved portion 12.
[0023]
It should be noted that even if the number of attachment points of the ring-like stopper 50 is increased in consideration of the assemblability and the attachment strength, it is within the scope of the present invention. For example, even if the stopper 50 is engaged with the curved portion 12 located at the intermediate portion of the tube spacer 40 and the number of the curved portions 12 to which the stopper 50 is attached is a majority, the present invention The scope of the implementation.
[0024]
The heat exchanger 16 is a closed type heat exchanger with fins 7. If necessary, a closed heat exchanger without fins 7 may be used (see FIG. 9).
[0025]
The heat exchanger A is detachably attached to the column 20 of the cooling tower B via the side plate 30. The heat exchanger A is mounted below an upper water tank, which is a type of a water sprinkler of the cooling tower B. (See FIG. 10).
[0026]
The support column 20 of the cooling tower B is formed of a square pipe, and several pairs of upper and lower opposing support jaws 22 are formed by projecting from the peripheral surface of the pipe and formed on the side plate 30 on each pair of support jaws 22. The pair of engaging jaws 32 are slidable from the longitudinal direction and are mounted so as to be freely engaged with each other. The support jaws 22 do not need to be all vertically opposed to each other, and it is sufficient that at least one set of the support jaws 22 is formed vertically. Preferably, the support column 20 is formed of a U-shaped pipe, and is attached to an opening of the U-shaped pipe. In addition, a hooking jaw 32 formed on the side plate is attached to each support jaw 22 so as to be freely slidable from the longitudinal direction.
[0027]
The operation of this embodiment configured as described above is as follows.
Since the outside of the bending portion 12 is inserted into each of the long holes 42 from the inside of the long hole 42, and then the stopper 50 is engaged with the outer periphery of the bending portion of the bending portion 12 and is fixed, Since the outer peripheral dimension of the stopper 50 is larger than the width of the elongated hole 42, the stopper 50 engages with the elongated hole 42, and as a result, each curved portion 12 does not shift inward from the elongated hole 42, and the closed heat exchanger is used. The curved portion 12 at 16 does not come off from each tube spacer 40.
As described above, in a state where the curved portion 12 in the closed type heat exchanger 16 is attached to the pipe spacers 40, the support jaws 32 of the side plates 30 project from the peripheral surface of the pipe of the support column 20. Flanges 46, which are supported by the jaws 22 and are formed in the support grooves 34 formed on the inner surface of each of the side plates 30 so as to protrude in the vertical direction at the opening edge of each of the tube spacers 40, slide in the longitudinal direction, The heat exchanger A is charged into the cooling tower B and used.
[0028]
Further, since the pipe spacer 40 is made of an electrically insulating synthetic resin, and the pipes 10 and the curved portions 12 are made of metal, the pipe spacer 40 and the pipes 110 to the curved portion 12 are provided in the same manner as in the related art. Electric corrosion does not occur, and a phenomenon that small holes are formed in the pipes 11 to the curved portions 12 and the circulating cooling water leaks does not occur. Further, since each curved portion 12 is supported in a detached state by the stopper 50 attached from the outside of the tube spacer 40, the brazed portion between the curved portion 12 and the pipe 10 is inside the tube spacer 50. The spray water is also sprayed on a part of the U-shaped pipe near the brazed portion, and the circulating cooling water flowing in the closed heat exchanger B is indirectly cooled.
[0029]
Since the extreme tip of the curved portion 12 of the cooling coil in the heat exchanger 16 is supported by the pair of pipe spacers 40, the support span is slightly longer than that of the conventional one by a part of the U-shaped pipe. As a result, the contact area between the spray water sprinkled from the upper water tank and the heat exchanger 16 is somewhat increased, and the cooling capacity is somewhat increased.
[0030]
Embodiment 2
This embodiment is a typical embodiment of the invention described in claim 8, and the configuration different from the first embodiment is as follows.
The stopper 50 is a band made of an elastic synthetic resin, which is a band for binding used for binding an electric cord or the like (not shown).
In addition, the same reference numerals as those in the first embodiment denote the same components, and perform the same operations.
[0031]
Embodiment 3
This embodiment is a modification of the second embodiment, and the configuration different from the third embodiment is as follows.
The stopper 50 is a molded product of a slightly elastic synthetic resin such as elastic vinyl chloride, polyethylene, or polycarbonate having a C-shaped or Ω-shaped side surface, and has an inner diameter slightly smaller than the outer diameter of the curved portion 12 of the pipe. The outer diameter is formed larger than the width of the long hole 42. The stopper 50 has an opening 52, which expands the opening 18 against elasticity, and is further elastically fitted to the outer periphery of the pushing curved portion 12 to be elastically fixed to the curved portion 12 (FIG. 7).
In addition, the same reference numerals as those in the first embodiment denote the same components, and perform the same operations.
[0032]
Embodiment 4
This embodiment is a modification of the first embodiment, and the configuration different from the first embodiment is as follows.
The stopper 50 is formed by cutting a soft synthetic resin hose whose inner diameter is slightly smaller than the diameter of the pipe in the curved portion 12 and cutting a part thereof in the radial direction (not shown).
In addition, the same reference numerals as those in the first embodiment denote the same components, and perform the same operations.
[0033]
Embodiment 5
This embodiment is a typical embodiment of the invention described in claim 9, and the configuration different from the first embodiment is as follows.
The stopper 50 is made of a soft synthetic resin string that is easily deformed by torsion (see FIG. 8). In addition, the same reference numerals as those in the first embodiment denote the same configuration, and perform the same operation.
[0034]
【The invention's effect】
In the invention described in claims 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the number of parts of the closed type heat exchanger for the cooling tower is made smaller than that of the conventional one, and the assembly is performed. In this case, the work of spot welding the tube spacer receiving portion to the side plate and the work of bolting the side plate to the frame of the cooling tower are unnecessary, so that the time and labor required for assembly can be reduced, and the manufacturing cost can be reduced.
Furthermore, it is possible to easily assemble the heat exchanger into the cooling tower, and furthermore, each of the closed heat exchangers in the cooling tower heat exchanger together with the tube spacer can be easily laterally arranged with respect to the side plate, that is, It can be assembled and removed from its longitudinal direction, and its maintenance can be facilitated.
In order to prevent each of the curved portions from coming off from each of the long holes, in the curved portions protruding outward from the long holes, the ring-like stopper is provided at least two locations for each pipe spacer for each of the meandering cooling coils. Since the hermetically sealed heat exchanger is supported and fixed between the pair of pipe spacers by being hung around and fixed to the outer periphery of the apex portion of the curved portion, there is no thermal deformation at the time of brazing the pipe spacers. In addition, a heat exchanger for a cooling tower that can be easily assembled can be obtained.
Such an effect is particularly remarkable in a heat exchanger for a cooling tower including a finned closed heat exchanger.
Furthermore, since the ring-like stoppers are hung around and fixed to the outer circumference of the apex portion of at least two curved portions addressed to each pipe spacer for each of the meandering cooling coils, without increasing the number of ring-like stoppers, The curved portion of the meandering cooling coil can be hooked and fixed to the tube spacer.
Since the extreme end of the curved portion of the cooling coil in the heat exchanger is supported by the pair of pipe spacers, the supporting span is slightly longer than that of the conventional one, and as a result, the water sprayed from the upper water tank is sprayed. The contact area between water and the heat exchanger is somewhat increased, and the cooling capacity is increased accordingly.
In particular, in the invention according to claim 2, since the tube spacer is made of synthetic resin and each of the curved portions is made of metal, the tube spacer and each of the curved portions can be completely isolated as in the related art, The occurrence of electric corrosion between them can be completely eliminated, and even if the supporting side plate is formed of metal, small holes will not be formed in the curved portions or pipes due to electric corrosion.
[0035]
In particular, in the invention according to claim 6, since the side plates are integrally formed with connectors at upper and lower ends thereof, a plurality of the side plates can be easily connected up and down, and the heat exchanger for the cooling tower can be simplified. The side plates can be arranged in multiple stages through the tube spacer.
Further, it has an effect of preventing water sprayed on the heat exchanger from leaking outside from the joint of the side plates.
[0036]
In particular, in the invention according to claim 7, in addition to the above-mentioned effects, the stopper is formed of a ring-like band made of an elastic synthetic resin, and is fixed so as to surround at least ／ of the pipe of the curved portion. Therefore, the ring member can be tightly supported on the outer peripheral surface of each curved portion by using the elastic force of the stopper, and the retaining effect can be sufficiently exhibited.
[0037]
In particular, in the invention according to claim 8, since the elastic synthetic resin band is a band for binding, the ring member can be securely tightened and fixed to the outer peripheral surface of each curved portion.
[0038]
In particular, in the invention according to claim 9, the stopper is made of a soft synthetic resin string that is easily deformed by torsion and plastic deformation. In addition to the above-mentioned effects, the stopper can be easily attached to the curved portion.
[0039]
In particular, in the invention according to claim 10, since the outer diameter of the stopper is slightly larger than the minor diameter of the long hole, the ring member surely engages with the outside of the inner edge of the long hole, thereby securely inserting the stopper. Later, each curved portion of each step can be irremovably supported in the elongated hole by the ring member.
[0040]
In the cooling tower according to the eleventh aspect, the effects of the inventions according to the first to tenth aspects can be sufficiently exhibited to cool the circulating cooling water.
In the cooling tower according to the twelfth aspect of the present invention, the supporting column of the cooling tower is formed of a pipe, and a plurality of pairs of upper and lower facing support jaws are formed by projecting from the peripheral surface of the pipe. The pair of engaging jaws formed on the side plate are slidable from the longitudinal direction of the supporting jaw and are mounted so as to be freely engaged with each other, so that the side plate can be stably supported on the column.
In the invention of the cooling tower according to the thirteenth aspect, the column of the cooling tower is formed of a U-shaped pipe, and is attached to an opening of the U-shaped pipe. Have been formed to protrude several times, and the hooking jaws formed on the side plates on each supporting jaw are slidably attached to each other from the longitudinal direction, so that the strength of the column is not reduced, The support jaw can be formed, and the same effect as the twelfth aspect can be obtained.
[Brief description of the drawings]
FIG. 1 is a plan view of a heat exchange coil according to a first embodiment.
FIG. 2 is a schematic plan view showing a step of inserting a long hole of an electrically insulating support member into a curved portion of the heat exchange coil of FIG.
FIG. 3 is a schematic plan view showing a process of attaching a ring-like stopper to a curved portion in FIG.
FIG. 4 is a perspective view of a main part of FIG. 3;
FIG. 5 is an enlarged partially omitted front view of FIG. 3;
FIG. 6 is a schematic vertical sectional side view of a heat exchanger.
FIG. 7 is a partially omitted side view showing an attached state of a stopper different from that of FIG. 4;
FIG. 8 is a partially omitted side view showing a mounted state of another stopper.
FIG. 9 is a plan view of a heat exchange coil without fins.
FIG. 10 is a schematic vertical sectional view of a cooling tower.
FIG. 11 is a schematic vertical sectional side view of a conventional example.
[Explanation of symbols]
A Closed heat exchanger 10 Pipe 12 Curved section B Cross-flow cooling tower 30 Side plate 40 Tube spacer 42 Slot 50 Stopper

Claims (13)

Pipes are connected by curved sections between a pair of vertical side plates that can be arranged opposite to both sides of the outside air intake of the cooling tower via electrically insulating tube spacers, forming a circulating cooling channel meandering in the plane direction In a cooling tower heat exchanger, a plurality of cooling tower closed-type heat exchangers comprising cooling coils are arranged at intervals vertically.
The pipe spacer has a length corresponding to the depth dimension of the heat exchanger, and long holes into which the respective curved portions in the heat exchanger can be inserted are formed at intervals, and the pipe spacers are formed from the long holes. A ring-like stopper for stopping the curved portion protruding toward the side plate from coming off from the long hole is engaged with and fixed to the outer periphery of the apex portion of at least two curved portions directed to each pipe spacer for each of the meandering cooling coils. A plurality of the heat exchangers are supported and piped between a pair of pipe spacers that can be arranged at intervals in the width direction of the outside air intake of the cooling tower,
Each of the tube spacers is slidable with respect to each of the side plates along the longitudinal direction thereof and is detachably provided, and the side plates are capable of engaging with the columns of the cooling tower. . The heat exchanger according to claim 1, wherein the tube spacer is made of a synthetic resin, and each of the curved portions is made of metal. The heat exchanger for a cooling tower according to claim 1, wherein at least three heat exchangers are detachably connected to the pair of side plates via the pipe spacer. . Each of the tube spacers is a trapezoidal or rectangular channel-shaped extruded product having a cross section, and a pair of edges of each of the tube spacers is provided with engaging flanges. The heat exchanger for a cooling tower according to claim 1, 2 or 3, wherein the heat exchanger is slidably engaged with the groove in the longitudinal direction and is detachably provided. Each of the side plates is a modified extrusion made of synthetic resin, and on the outer surface of each of the side plates, a dovetail groove / a dovetail shape for engaging with the support or a pair of upper and lower hook-shaped engaging jaws in the horizontal direction. The side plates are extended and formed integrally in a hierarchical manner, and each of the side plates is slidably engageable with a supporting jaw provided on a column by these engaging jaws, and is detachably provided. Item 6. A heat exchanger for a cooling tower according to Item 4. The upper and lower ends of the side plate are integrally formed with connectors for connecting the side plates vertically adjacent to each other, the side plates are sequentially connected to each other in a vertical direction by the connectors, and the heat exchanger has a multi-stage structure. The heat exchanger for a cooling tower according to any one of claims 1, 2, 3, 4, and 5, wherein the heat exchanger is disposed on the side plates via the tube spacer. 4. The stopper according to claim 1, wherein the stopper is formed of a ring-like band made of an elastic synthetic resin, and is fixed so as to surround at least ／ of the pipe of the curved portion. 7. The heat exchanger for a cooling tower according to 4, 5 or 6. The heat exchanger for a cooling tower according to claim 7, wherein the elastic synthetic resin band is a binding band. 9. The heat exchanger according to claim 8, wherein the stopper is made of a string made of a synthetic resin that is soft and easily deformed by torsional plastic deformation. The outer diameter of the stopper is slightly larger than the minor diameter of the long hole in a state where the stopper is attached to the curved portion. 10. The heat exchanger for a cooling tower according to 8 or 9. The heat exchanger according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 is detachably assembled to a column of a cooling tower via the side plate, and the heat exchanger is A cooling tower, which is installed below a water sprinkling device of the cooling tower. The supporting column of the cooling tower is formed of a square pipe or a square C-shaped member, and upward and downward supporting jaws are formed by projecting from the peripheral surface of the pipe several times. The cooling tower according to claim 11, wherein the cooling tower is slidably fitted from the longitudinal direction. The column of the cooling tower is formed of a U-shaped pipe, attached to an opening of the U-shaped pipe, and a flat plate closing the opening is formed by projecting the support jaws several times, 13. The cooling tower according to claim 12, wherein a hooking jaw formed on the side plate is attached to each supporting jaw so as to be freely slidable from the longitudinal direction.

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