JPH0622782U - Heat transfer tube support structure for multi-tube heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the heat exchange performance of a multi-tube heat exchanger,
To reduce the manufacturing cost of the support structure and to improve the ease of assembly and disassembly. [Structure] A plurality of plane-shaped meandering heat transfer tubes 5
Are arranged at appropriate intervals in a plane orthogonal direction, and a plurality of meandering heat transfer tubes 5 are provided with a meandering support member 6 formed in a plane orthogonal to the plane at a plurality of locations in the length direction to support the heat transfer tubes 5. The flat heat transfer tube 5 corresponding to the straight portion 6s of the member 6 was fixed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat transfer tube support structure for a multi-tube heat exchanger, and more particularly, to a structure configured to be supported by a meandering support member that is substantially the same as the heat transfer tube.

[0002]

[Prior art]

 Conventionally, a multi-tube heat exchanger has a structure in which both ends of a large number of straight straight tubes are supported by can plates, and a plurality of meandering heat transfer tubes formed in a plurality of planes at multiple locations. A structure supported by a supporting member has been put into practical use. Recently, heat exchangers that effectively use late-night power to store cold heat and warm heat are often installed in the dead space in the basement of a building, but there is much demand for this heat exchanger and Usually, the latter multitubular heat exchanger is used. Regarding this multi-tube heat exchanger, conventionally, a meandering heat transfer tube has been manufactured by sequentially connecting the ends of a plurality of straight tubes with a U-shaped vent. However, recently, at a steel maker's factory, a technique has been established to manufacture a flat, meandering heat transfer tube at a relatively low cost by bending one long pipe material into a meandering shape using a special bending device. ing.

Conventionally, in the above-mentioned multitubular heat exchanger, a plurality of flat and meandering heat transfer tubes are arranged at appropriate intervals in a plane orthogonal direction, and support members are provided at a plurality of positions in the length direction thereof. This heat transfer tube is fixedly supported by a support member. The support member is usually composed of a rectangular frame body made of an angle member or the like, and a plurality of support members made of a flat bar or the like for fixing and supporting a flat heat transfer tube. However, there is also a structure in which a pair of upper and lower frame members are provided, a plurality of support members are mounted on these frame members, and a flat and meandering heat transfer tube is fixedly supported on each support member. In addition to this, support members having various structures are used by various companies. On the other hand, Japanese Utility Model Laid-Open No. 62-34682 simplifies the assembly of a multi-tube heat exchanger by forming a heat transfer tube in a meandering shape in advance and sequentially mounting a space holding plate between the heat transfer tubes. The technique to do is described.

[0004]

[Problems to be solved by the device]

 In the heat transfer tube support structure of the multi-tube heat exchanger, a structure in which angle members and flat bars are appropriately combined and connected by welding or bolts is adopted as the support member. When the multi-tube heat exchanger is used as, for example, an ice making device for cold heat storage, the multi-tube heat exchanger is placed in a water tank, and a refrigerant is circulated in the heat transfer tube at midnight to surround the heat transfer tube. A lot of ice is made, and the ice is melted in the daytime to make cold water. In the conventional support structure, the heat exchange rate is reduced due to the water flow at the time of making the cold water being hindered by the support member composed of the angle member and the flat bar, and the weight of the steel material of the support structure is large and the heat capacity is large, so that the ice making is performed. There are problems such as reduced ability.

Further, with respect to the supporting members of the supporting structure, since the number of the members is large, the manufacturing cost of processing and assembling the members is high, the supporting member is heavy as a whole, and the material cost is also high. There is also a problem that a large number of man-hours are required for assembling and disassembling the heat transfer tube when the assembly is once disassembled at the factory and then installed at the installation site. The object of the present invention is to improve the heat exchange performance of a multi-tube heat exchanger, reduce the manufacturing cost of the support structure, and improve the assembling / disassembling property.

[0006]

[Means for Solving the Problems]

 The heat transfer tube supporting structure for a multi-tube heat exchanger according to claim 1, wherein a plurality of meandering heat transfer tubes formed in a plane are arranged at appropriate intervals in a plane orthogonal direction. In the plurality of meandering heat transfer tubes, a plurality of meandering support members formed in a plane orthogonal to the plane are provided in a cross shape at a plurality of locations in the lengthwise direction of the plurality of meandering heat transfer tubes. In addition, a flat heat transfer tube corresponding to it is fixed.

A heat transfer tube supporting structure for a multi-tube heat exchanger according to a second aspect is the structure according to the first aspect, wherein the meandering supporting member is made of a pipe material having a small diameter. The heat transfer tube support structure for a multi-tube heat exchanger according to claim 3 is the structure according to claim 2, wherein the small-diameter pipe material forming the support member is the same kind and the same diameter as the heat transfer tube. It is a thing. A heat transfer tube support structure for a multi-tube heat exchanger according to a fourth aspect is the structure according to the first aspect, wherein the meandering support member is made of a steel rod having a small diameter.

[0008]

[Action]

 In the present invention, the meandering support members formed in a plane orthogonal to the plane of the heat transfer tubes are provided in a cross shape at a plurality of locations in the lengthwise direction of the plurality of meandering heat transfer tubes. Since the corresponding flat heat transfer tubes are fixed to each straight part, the number of supporting members is small and they are an integrated product and lightweight. Therefore, the manufacturing cost of the supporting members is low and the material cost of the supporting members is also low. It will be cheaper. Moreover, since the supporting member is thin and light, the flow of water is smooth when cold water or hot water is generated, the heat exchange rate is improved, and the heat capacity of the supporting member is small, resulting in excellent heat exchange performance. Furthermore, since each support member made of an integrated product is arranged in a cross shape in a plurality of heat transfer tubes, and the corresponding flat heat transfer tubes may be fixed to each straight portion of the support member, Easy to assemble and disassemble.

In the second aspect, since the meandering support member of the first aspect is made of a pipe material having a small diameter, the weight of the support member can be reduced, the manufacturing cost and the material cost can be reduced, and the heat exchange performance can be improved. Can be improved. In claim 3, since the small-diameter pipe material forming the support member of claim 2 is made of a pipe material of the same type and the same diameter as the heat transfer tube, the support member is collectively ordered when the heat transfer tube is ordered. Therefore, the manufacturing cost and material cost of the supporting member can be further reduced. According to a fourth aspect, in the first aspect, the meandering support member is made of a small-diameter steel rod, so that the support member can be reduced in weight, the manufacturing cost and the material cost can be reduced, and the heat exchange performance can be improved. Can be improved.

[0010]

[Effect of device]

 According to the present invention, the following effects can be obtained as described in the section of the operation. According to claim 1, since the number of the supporting members is small and the supporting members are integrated and lightweight, the manufacturing cost of the supporting members is low and the material cost of the supporting members is also low. Moreover, since the support member is thin and light, the flow of water is smooth when cold water or hot water is generated, the heat exchange rate is improved, and the heat capacity of the support member is small, resulting in excellent heat exchange performance. Furthermore, since each support member made of an integrated product is arranged in a cross shape in a plurality of heat transfer tubes, and the corresponding flat heat transfer tubes may be fixed to each straight portion of the support member, Easy to assemble and disassemble.

According to the second aspect, since the meandering support member is made of a pipe material having a small diameter, it is possible to reduce the weight of the support member, reduce the manufacturing cost and the material cost, and improve the heat exchange performance. According to claim 3, since the small-diameter pipe material forming the support member is made of the same kind and the same diameter as the heat transfer tube, the support member can be collectively ordered when the heat transfer tube is ordered, The manufacturing cost and material cost of the support member can be further reduced. According to the fourth aspect, since the meandering support member is made of a steel rod having a small diameter, it is possible to reduce the weight of the support member, reduce the manufacturing cost and the material cost, and improve the heat exchange performance.

[0012]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. This example applies the present invention to a multi-tube heat exchanger of a cold heat storage plant that is installed in the basement of a building, makes ice with cheap late-night power in summer, and melts the ice in the daytime to produce cold water for cooling. This is an example of the case. As shown in FIGS. 1 and 2, in the water tank 1 of the cold heat storage plant, a multi-tube heat exchanger 2 having a total of 20 rows of 5 rows and 4 columns is installed at appropriate intervals. The refrigerant introduction header 3 of the container 2 is connected to the refrigerant supply pipe to which the refrigerant is supplied from the refrigeration system, and the refrigerant derivation header 4 of these multitubular heat exchangers 2 is a cooling medium return pipe for returning the refrigerant to the refrigeration system. These multi-tube heat exchangers 2 are connected and installed in the water tank 1. At midnight in summer, a refrigerant (eg, ethylene glycol) cooled from a refrigerating device is supplied to these multitubular heat exchangers 2 to make a large amount of ice to store cold heat, and during the day, a large amount of the ice is melted. The latent heat will produce cold water for cooling.

The multi-tube heat exchanger 2 will be described with reference to FIGS. 2 to 7. The multi-tube heat exchanger 2 basically includes eight meandering heat transfer tubes 5 each formed in a vertical plane extending in the left-right direction, a refrigerant introduction header 3, and a refrigerant derivation header 4. Further, two meandering support members 6 are provided at the left portion and the right portion of the heat transfer tubes 5 so as to intersect with each other. The eight meandering heat transfer tubes 5 are arranged in parallel in the front-rear direction at predetermined intervals, and the upper ends of the four refrigerant inlet side heat transfer tubes 5A are connected to the refrigerant introduction header 3, respectively. Further, the upper ends of every other four cooling medium outlet side heat transfer tubes 5B adjacent to these four refrigerant inlet side heat transfer tubes 5A are connected to the refrigerant outlet header 4 and further, at each refrigerant inlet side. The lower end of the heat transfer pipe 5A is connected to the lower end of the refrigerant outlet side heat transfer pipe 5B on the front side thereof by welding via a U-shaped connecting pipe 7. Therefore, the refrigerant introduced from the refrigerant introduction header 3 into each refrigerant inlet side heat transfer tube 5A is led out to the refrigerant outlet header 4 through the refrigerant inlet side heat transfer tube 5A and the refrigerant outlet side heat transfer tube 5B connected thereto. It will be ruko.

Each heat transfer tube 5 is manufactured by bending one continuous pipe material (for example, STPG25 pipe material, outer diameter 34 mmφ) by a special bending device. The heat pipe 5 is formed as a meandering heat transfer pipe having 10 or 11 horizontal straight portions 5s and a U-shaped bent portion 5b extending from the end of the straight portion 5s to the left-right direction as a whole. It is shaped like a vertical plane. Each of the support members 6 is manufactured by bending one continuous steel bar material (for example, an outer diameter of 20 to 30 mmφ) by the bending apparatus, and each of the support members 6 has eight positions. It is formed in a meandering member having a vertical straight portion 6s and a U-shaped bent portion 6b extending from the end to the end of the straight portion 6s, and is formed in a vertical plane shape as a whole in the front-back direction. As shown in FIG. 6, each flat heat transfer tube 5 is disposed in front of each pair of straight portions 6s of the pair of left and right support members 6, and each of the straight portions 5s of each heat transfer tube 5 is supported. A portion of the member 6 that intersects with the straight portion 6s is fixed to the corresponding straight portion 6s via a U bolt 8 and a nut 9, as shown in FIG. It is preferable to use, as the steel bar material of the support portion 6, one having a diameter of about 0.5 to 2.0 times the diameter of the heat transfer tube 5.

In the structure of this fixing portion, the leg portion 8 a of the U bolt 8 holding the heat transfer tube 5 is inserted into the two bolt holes 10 formed in the straight portion 6 s of the support member 6 in the front-rear direction. The heat transfer tube 5 is fixed to the support member 6 by fastening the nut 9 to the tip of the leg portion 8 a of the U bolt 8. As shown in FIG. 6, each straight portion 5s of the heat transfer tube 5B on the refrigerant outlet side is positioned at an intermediate height level between the straight portions 5s of the heat transfer tube 5A on the refrigerant inlet side so that the heat can be uniformly cooled. They are arranged in a triangular array. Furthermore, since buoyancy acts on the shell-and-tube heat exchanger 2 in the ice-making state, the bottom portions of the left and right support members 6 are fixed to the fixing rail members at the bottom of the water tank 1 with bolts or the like.

The operation of the heat transfer tube support structure of the multi-tube heat exchanger 2 described above will be described. Explaining the manufacturing method of the multi-tube heat exchanger 2, each heat transfer tube 5 and each support member 6 are ordered from an iron-making maker and delivered by a flat and meandering member. At the time of assembly, first, the pair of left and right support members 6 are set in a predetermined jig and held in position, and the rearmost heat transfer tube 5 is inserted from below to the state shown in FIG. And then fix it with U bolts 8 and nuts 9, then insert the heat transfer tubes 5 on the front side from above and fix them with U bolts 8 and nuts 9, and so on. Insert and fix. After that, the U-shaped connecting pipe 7 that connects the lower end of each refrigerant introduction side heat transfer tube 5A and the corresponding lower end of the refrigerant introduction side heat transfer tube 5B is welded, and the refrigerant introduction header 3 and the refrigerant derivation header 4 are welded together. If so, the multitubular heat exchanger 2 is completed. However, the above assembling method is only an example, and various methods can be adopted.

A meandering support member 6 formed in a plane shape orthogonal to the plane of the heat transfer tube 5 is provided in a cross shape, and each straight portion 6 s of the support member 6 has a corresponding flat heat transfer tube 5. Since the supporting members 6 are fixed, the number of the supporting members 6 is small, and the supporting members 6 are integrated and lightweight, so that the manufacturing cost of the supporting members 6 is low and the material cost of the supporting members 6 is low. Moreover, since the support member 6 is thin and light, the flow of water flow is smooth when cold water or hot water is generated, the heat exchange rate is improved, and the heat capacity of the support member 6 is also small, resulting in excellent heat exchange performance. Further, each support member 6 made of an integral product may be arranged in a cross shape on the plurality of heat transfer tubes 5, and the corresponding flat heat transfer tubes 5 may be fixed to each straight portion 6s of the support member 6. Therefore, the heat transfer tube 5 can be easily assembled and disassembled. As the material of the support member 6, in addition to the round bar steel material, a hexagonal bar steel material having a diameter of about 0.5 to 2.0 times the diameter of the heat transfer tube 5 or a width of 0.5 times the diameter of the heat transfer tube 5. It is also possible to use a flat bar of about 2.0 times or more, and it is also possible to use various other bar-shaped steel materials.

Next, a part of the above embodiment may be modified as follows. (1) The support member 6 is formed as a meandering member made of a pipe material. In this case, if the heat transfer tube 5 is made of the same kind (steel material of the same kind) and the same diameter as the pipe material, the support member 6 may be manufactured by the supplier at the time of manufacturing the heat transfer tube 5. Therefore, the manufacturing cost of the supporting member 6 becomes low. However, the support member 6 may be manufactured using various pipe materials (preferably a diameter of 0.5 to 2.0 times the diameter of the heat transfer tube 5) as the raw material. (2) The fixing structure of the heat transfer tube 5 of the support member 6 of the above embodiment is not limited to the U-bolt 8 and may be fixed by welding as shown in FIG. However, it can be adopted when it is not necessary to disassemble the multi-tube heat exchanger 2 after assembling.

(3) As described in (2) above, when the supporting member 6 is made of a pipe material and is fixed to the U-bolt 8, water enters the inside of the supporting member 6 and freezes the water. Since the supporting member 6 may burst, it is desirable to fix the heat transfer tube 5 to the supporting member 6 by using the pipe connecting fitting 20 as shown in FIGS. 9 and 10. The pipe connecting fitting 20 will be briefly described. The pipe connecting fitting 20 includes an L-shaped first holder member 21, a first pressing member 22 hinged to the first holder member 21, and a first holding member 22. The second holder member 25 is fixed to the first holder member 21 and is oriented in different directions by 90 degrees, and the second holder member 25 is hinged to the second holder member 25.

With the support member 6 sandwiched between the first holder member 21 and the first pressing member 22, the bolts 23 extending from the first holder member 21 and inserted into the first pressing member 22 are fastened with the nuts 24. By the above, the heat transfer tube 5 was fixed to the support member 6, and similarly, the heat transfer tube 5 was sandwiched between the second holder member 25 and the second pressing member 26, and extended from the second holder member 25 to be inserted into the second pressing member 26. The bolt 27 is fastened to the heat transfer tube 5 by fastening it with the nut 28, so that the bolt 27 is fixed to the heat transfer tube 5. The pipe connecting fitting 20 can also be used in the case of the supporting member 6 made of the steel bar material of the above-described embodiment. It should be noted that the above embodiment is not limited to an example, and it is possible that various modifications may be made to the structure of the support member 6, the structure of the fixing portion between the heat transfer tube 5 and the support member 6, and the like. Of course, the multitubular heat exchanger 2 may be used as a heat exchanger for producing hot water for heating, or may be used as a heat exchanger for various other purposes.

[Submission date] June 2, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

In the structure of this fixing portion, the leg portion 8 a of the U bolt 8 holding the heat transfer tube 5 is inserted into each of the two bolt holes 10 formed in the straight portion 6 s of the support member 6 in the front-rear direction. The heat transfer tube 5 is fixed to the support member 6 by fastening the nut 9 to the tip of the leg portion 8a of the U bolt 8. As shown in FIG. 6, each straight portion 5s of the refrigerant outlet side heat transfer tube 5B is positioned at an intermediate height level between the straight portions 5s of the refrigerant inlet side heat transfer tube 5A so that the refrigerant can be uniformly cooled. They are arranged in a triangular array. Furthermore, since buoyancy acts on the shell-and-tube heat exchanger 2 in the ice-making state, the bottom portions of the left and right support members 6 are fixed to the fixing rail members at the bottom of the water tank 1 with bolts or the like.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

The operation of the heat transfer tube supporting structure of the multi-tube heat exchanger 2 described above will be described. Explaining the manufacturing method of the multi-tube heat exchanger 2, each heat transfer tube 5 and each support member 6 are ordered from an iron-making maker and delivered by a flat and meandering member. At the time of assembly, first, the pair of left and right support members 6 are set in a predetermined jig and held in position, and the rearmost heat transfer tube 5 is inserted from below to the state shown in FIG. And then fix it with U bolts 8 and nuts 9, then insert the heat transfer tubes 5 on the front side from above and fix them with U bolts 8 and nuts 9, and so on. Insert and fix. After that, the U-shaped connecting pipe 7 that connects the lower end portion of each refrigerant inlet side heat transfer tube 5A and the corresponding lower end portion of the refrigerant outlet side heat transfer tube 5B is welded, and the refrigerant introduction header 3 and the refrigerant derivation header 4 are welded together. If so, the multitubular heat exchanger 2 is completed. However, the above assembling method is only an example, and various methods can be adopted.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

Next, a part of the above embodiment may be modified as follows. (1) The support member 6 is formed as a meandering member made of a pipe material. In this case, if the heat transfer tube 5 is made of the same kind (steel material of the same kind) and the same diameter as the pipe material, the support member 6 may be manufactured by the supplier at the time of manufacturing the heat transfer tube 5. Therefore, the manufacturing cost of the supporting member 6 becomes low. However, the support member 6 may be manufactured using various pipe materials (preferably a diameter of 0.5 to 2.0 times the diameter of the heat transfer tube 5) as the raw material. (2) The fixing structure of the supporting member 6 heat transfer tube 5 of the embodiment is not limited to the U bolt 8, as shown in FIG. 7, it may be fixed by welding. However, it can be adopted when it is not necessary to disassemble the multi-tube heat exchanger 2 after assembling.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

(3) As described in (2) above, when the supporting member 6 is made of a pipe material and is fixed by the U bolts 8, water enters the inside of the supporting member 6 and freezes the water. Since the supporting member 6 may burst, it is desirable to fix the heat transfer tube 5 to the supporting member 6 by using the pipe connecting fitting 20 as shown in FIGS. 9 and 10. The pipe connecting fitting 20 will be briefly described. The pipe connecting fitting 20 includes an L-shaped first holder member 21, a first pressing member 22 hinged to the first holder member 21, and a first holding member 22. 1 second holder member 25 having different fixed 90 degree orientation to the holder member 21, and a second pressing member 26 and the like which is hinged to the second holder member 25 of this.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

With the support member 6 sandwiched between the first holder member 21 and the first pressing member 22, the bolts 23 extending from the first holder member 21 and inserted into the first pressing member 22 are fastened with the nuts 24. The support member 6 is fixed to the second holder member 25 and the second holding member 26 with the heat transfer tube 5 being sandwiched between the second holder member 25 and the second holding member 26. the bolt 27 by concluding a nut 28, and are configured to be fixed to the heat transfer tube 5. In the case of the support member 6 made of the steel bar material of the above-mentioned embodiment, the pipe connecting fitting 20 can be adopted. It should be noted that the above embodiment is not limited to an example, and it is possible that various modifications may be made to the structure of the support member 6, the structure of the fixing portion between the heat transfer tube 5 and the support member 6, and the like. of course, the multi-tube heat exchanger 2, both to likely be utilized, likely child both utilized as a heat exchanger for other various applications as a heat exchanger to make hot water for heating.

[Brief description of drawings]

FIG. 1 is a plan view of a water tank of a cold heat storage plant according to an embodiment.

2 is a perspective view of the multitubular heat exchanger of FIG. 1. FIG.

3 is a plan view of the multi-tube heat exchanger of FIG. 2. FIG.

4 is a front view of the multitubular heat exchanger of FIG. 2. FIG.

5 is a right side view of the multitubular heat exchanger of FIG. 2. FIG.

6 is a sectional view taken along line 6-6 of FIG.

FIG. 7 is a plan view of a main part of a fixing portion between a heat transfer tube and a support member.

FIG. 8 is a main part plan view of a modified example of the fixing portion between the heat transfer tube and the support member.

FIG. 9 is a side view of a fixing portion in which a heat transfer tube and a supporting member are fixed by a pipe connecting fitting.

FIG. 10 is a plan view of the fixing portion of FIG.

[Explanation of symbols]

 2 Multi-tube heat exchanger 5 Meandering heat transfer tube 6 Meandering support member 6s Straight part of support member

Claims (4)

[Scope of utility model registration request] 1. A multi-tube heat exchanger in which a plurality of meandering heat transfer tubes formed in a plane are arranged at appropriate intervals in a plane orthogonal direction, wherein the plurality of meandering heat transfer tubes are long. In a plurality of positions in the vertical direction, a meandering support member formed in a plane orthogonal to the plane is provided in an intersecting shape, and a flat heat transfer tube corresponding thereto is fixed to each straight portion of the support member. Characteristic multi-tube heat exchanger heat transfer tube support structure. 2. The heat transfer tube support structure for a multi-tube heat exchanger according to claim 1, wherein the meandering support member is made of a pipe material having a small diameter. 3. The heat transfer tube for a multi-tube heat exchanger according to claim 2, wherein the small-diameter pipe material forming the support member is made of a pipe material of the same type and diameter as the heat transfer tube. Support structure. 4. The heat transfer tube support structure for a multi-tube heat exchanger according to claim 1, wherein the meandering support member is made of a steel rod having a small diameter.