JP3693614B2 - Multi-tube heat exchanger and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multitubular heat exchanger used for heat exchange of a fluid and a manufacturing method thereof .
[0002]
[Prior art]
Conventionally, a multi-tube heat exchanger is used for heat exchange of fluid. As shown in FIGS. 11 to 14, the conventional multi-tube heat exchanger includes a plurality of heat exchange pipes 114 through which a fluid for exchanging heat flows, and both ends of the plurality of heat exchange pipes 114. Two tube plates 111 having insertion holes 111a into which a plurality of heat exchanging pipes 114 are inserted, and arranged at equal intervals between the two tube plates 111, and provided with insertion holes 112a. It comprises a baffle 112 that is a holder for holding the heat exchanging pipe 114, and a rod-shaped tie rod 113 for fixing the tube plate 111 and the baffle 112 in succession.
[0003]
In the process of manufacturing the conventional multi-tube heat exchanger, first, as shown in FIG. 11, tie rods 113 are respectively inserted into the insertion holes 111b for the tie rods 113 of the tube plate 111 and the insertion holes 112a of the tie rods 113 of the baffle 112. After the passage for inserting the heat exchanging pipe 114 is formed in advance, the heat exchanging pipes 114 are inserted into the insertion holes 111a and 112a one by one as shown in FIG.
[0004]
Next, as shown in FIG. 13, after the first heat exchanging pipe 114 is inserted into the insertion holes 111a and 112a, the second heat exchanging pipe 114 is inserted into the other insertion holes 111a and 112a, respectively. Inserted.
[0005]
After that, as shown in FIG. 14, all the heat exchanging pipes 114 are inserted into the respective insertion holes 111a and 112a to complete the multitubular heat exchanger.
[0006]
[Problems to be solved by the invention]
However, in the conventional multi-tube heat exchanger, it is necessary to pass one long heat exchanging pipe 114 through each of the insertion holes 111a and 112a, which takes a lot of time for insertion. There was a problem. Further, when the insertion holes 111a and 112a of the tube plate 111 and the baffle 112 are displaced from each other, there is a problem that the heat exchanging pipe 114 cannot be inserted.
[0007]
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a multitubular heat exchanger in which the manufacturing time can be shortened and inconveniences associated with construction are eliminated, and a method for manufacturing the same. That is.
[0008]
[Means for Solving the Problems]
The multi-tube heat exchanger according to the present invention includes a plurality of heat exchange pipes in which pipes through which heat exchanged fluids are stacked are stacked in a plurality of stages, and a plurality of heat exchange pipes are spaced apart from each other. Are arranged separately corresponding to each stage, and a plurality of holders for holding a plurality of heat exchanging pipes for each stage and two halved members are combined to form a plurality of And a restraining member to which a plurality of holding members are fixed.
[0009]
According to said structure, after arrange | positioning the heat exchange piping mutually spaced apart using the some holding | maintenance tool on one side of the half part for every step, the other half part is made into one half member. Since it is possible to use a manufacturing method in which a plurality of heat exchange pipes are bundled by joining, the manufacturing time can be shortened compared to a conventional multi-tube heat exchanger, and a multi-tube heat exchanger can be used. Inconveniences associated with construction work are eliminated.
[0010]
The multi-tube heat exchanger according to the present invention is a member for bundling a plurality of heat exchange pipes, provided near both ends of the plurality of heat exchange pipes, and each of the plurality of heat exchange pipes. A second restraining member having a plurality of insertion holes into which is inserted.
[0011]
According to the above configuration, the heat exchanging pipe is surely restrained, and the holder is installed while the heat exchanging pipe is temporarily restrained step by step using the insertion hole of the second restraining member. This makes it easy to manufacture a multi-tube heat exchanger.
[0012]
In the multitubular heat exchanger according to the present invention, it is desirable that the holder is in point contact with the heat exchange pipe.
[0013]
If it does in this way, since the heat carrier for heat exchange will flow easily along the direction where the pipe for heat exchange extends, heat exchange efficiency will improve.
[0014]
In the multitubular heat exchanger of the present invention, the holder is formed by bending an elongated plate-like member or wire member, and has a plurality of crests and a plurality of troughs, and a plurality of heat exchange pipes However, they may be arranged at intervals from each other by being installed in each of the plurality of valleys.
[0015]
According to the above configuration, since it is only necessary to bend an elongated plate-like member or wire member, the formation of the holder is simplified.
[0016]
In the multitubular heat exchanger of the present invention, each of the plurality of holders may be fixed to the restraining member by welding.
[0017]
According to said structure, the heat exchange piping can be bundled firmly.
In the multitubular heat exchanger of the present invention, a plurality of holders may be alternately fixed to each of both end faces of the half member for each step.
[0018]
According to said structure, the several piping for heat exchange can be hold | maintained more firmly.
[0019]
In the multitubular heat exchanger of the present invention, two halves may be fixed to each other by welding.
[0020]
According to said structure, fixation of half parts becomes firm and the reliability at the time of using as a heat exchanger improves.
[0021]
The multi-tube heat exchanger manufacturing method of the present invention includes a plurality of heat exchange pipes in which pipes through which heat exchanged fluid is guided are stacked in a plurality of stages, and all of the plurality of heat exchange pipes. Are provided separately for each stage so as to be spaced apart from each other, a plurality of holders for holding a plurality of heat exchange pipes for each stage, a first half member and a first Two of the two halved members are combined to be a member for bundling a plurality of heat exchange pipes, and the first restraint member to which the plurality of holding members are fixed and the plurality of heat exchange pipes are bundled together. And a second restraining member provided in the vicinity of both ends of the plurality of heat exchange pipes and having a plurality of insertion holes into which the plurality of heat exchange pipes are respectively inserted. It is a manufacturing method of a heat exchanger.
[0022]
Then, the heat exchange pipe for the lowermost stage is inserted into the insertion hole for the lowermost stage of the second restraining member, and the heat for the lowermost stage is inserted into the holder for the lowermost stage fixed to the first half member. The first step of installing the replacement pipe, and the second step of inserting the heat exchange pipe into the insertion hole corresponding to each stage and arranging the heat exchange pipes at intervals from each other using the holder A third step of placing the second half member on the uppermost heat exchange pipe arranged in the second step and fixing the first half member and the second half member; The fourth step of fixing a holder other than the lower holder to the first half member and the second half member and the other insertion hole of the second restraining means were bundled at a distance from each other. And a fifth step of inserting each of a plurality of heat exchange pipes.
[0023]
According to the manufacturing method as described above, the manufacturing time of the multitubular heat exchanger can be shortened in comparison with the conventional manufacturing method of the multitubular heat exchanger, and the multitubular heat exchanger can be shortened. Inconveniences associated with the construction of heat exchangers are eliminated.
[0024]
In the manufacturing method of the multi-tube heat exchanger according to the present invention, in the above-described fourth step, among the holders other than the lowermost stage holder, the holder fixed to the first half member is Immediately after installing the holder, the holder fixed to the first half member and fixed to the second half member is second after the second half member and the first half member are fixed. It is fixed to the half member.
[0025]
According to said structure, since a 1st holder is sequentially fixed to a 1st half member and piping for heat exchange is installed, there is no shift | offset | difference of a holder and workability | operativity improves.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a multi-tube heat exchanger according to an embodiment of the present invention will be described with reference to FIGS.
[0029]
FIG. 1 is a schematic diagram showing an overall configuration of a multitubular heat exchanger 100 of the present embodiment. As shown in FIG. 1, the multi-tube heat exchanger 100 of the present embodiment includes a bundle 1 of heat exchange pipes, a case 10 configured to surround the bundle 1 of heat exchange pipes, An inflow fluid pipe 2 constituting a heat exchange fluid path for guiding from the outside of the case 10 to the inside of the case 10 through the inside of the case 10, and a fluid guided to the inside of the case 10 to exchange heat And an outflow fluid pipe 3 that guides the outside to the outside of the case 10. In addition, the multitubular heat exchanger 100 of the present embodiment is provided with an inflow steam pipe 4 that guides the inflow steam into the case 10 and an outflow steam pipe 5 that allows the steam to flow out of the case 10.
[0030]
Then, in the process of flowing the fluid for heat exchange according to the arrow R2, steam is introduced from the inlet of the inflow steam pipe 4 as shown by the arrow R1, and the bundle 1 of pipes for heat exchange in the case 10 is shown. And flows out from the outlet of the outflow steam pipe 5. As a result, in the heat exchange pipe, the fluid passing through the heat exchange pipe is heated by the steam temperature, and the high-temperature outflow fluid flows out from the outflow fluid pipe 5.
[0031]
In the multi-tube heat exchanger of the present embodiment, water passes through the heat exchange pipe as the fluid to be heat exchanged, but other than water, such as milk, coffee or chemicals It may be. In addition, although steam is used as a fluid for heat exchange that gives heat to water, a hot fluid other than steam may be used.
[0032]
Further, in the present embodiment, the low-temperature fluid flowing in the heat exchange pipe is passed through the high-temperature fluid in the case 10 and outside the heat exchange pipe. Heat exchange was performed to raise the temperature. By passing a low-temperature heat fluid through the case 10, heat is taken away from the high-temperature fluid flowing in the heat exchange pipe so that a low-temperature fluid can be obtained. A multitubular heat exchanger may be used.
[0033]
In addition, the material of the heat exchange pipe in the multi-tube heat exchanger 100 may be plastic or stainless steel, but may be any material as long as it is suitable for heat exchange. In the multitubular heat exchanger 100 of the present embodiment, the temperature difference between the fluid before heat exchange and the fluid after heat exchange is 180 ° C.
[0034]
Next, the manufacturing process of the multi-tube heat exchanger 100 according to the present embodiment will be sequentially described with reference to FIGS. First, as shown in FIG. 2, a tube plate 11 (the tube plate 11 has an insertion hole 11a), a half ring 12a, and a bending rod-shaped holder 13 are prepared. The tube plate 11 and the half ring 12a are arranged with the tube plate 11 at both ends, and the half ring 12a is arranged at equal intervals between the tube plates 11 at both ends. The work to assemble the piping for use is started.
[0035]
Next, in each half ring 12a, the lowermost bent bar-shaped holder 13 is fixed to the side end face of the half ring 12a by welding. This welding process may be performed in advance.
[0036]
In FIG. 2, the lower side of the bent bar-shaped holder 13 at the lowermost stage is cut, but this is because the portion protruding from the outer periphery of the half ring 12 a is deleted. In addition, you may perform the process of deleting the part which protruded from the outer periphery of the half ring 12a, after all the heat exchanger assembly is completed.
[0037]
Next, as shown in FIG. 3, the heat exchanging pipe 14 is passed through the insertion hole 11 a of the tube plate 11, and the heat exchanging pipes are respectively placed in the valley portions of the bent bar-shaped holder 13. The piping for heat exchange is positioned. In addition, the shape of the peak part and trough part of this bending rod-shaped holder 13 is suitably determined according to the diameter of the heat exchanging pipe 14.
[0038]
Next, when the arrangement of the heat exchanging pipe 14 located at the lowermost stage is completed, as shown in FIG. 4, a bent bar-shaped holder 13 is further placed on the heat exchanging pipe 14 located at the lowermost stage. . As a result, the lowermost heat exchange pipe 14 and the second heat exchange pipe 14 are arranged at a predetermined interval. Further, the bent bar-shaped holder 13 at the second stage may be simply placed. However, the bent bar-shaped holder 13 is firmly fixed to the half ring 12a by being fixed to the side end surface of the half ring 12a by welding. Can be fixed.
[0039]
Further, the lowermost bent bar-shaped holder 13 and the second bent bar-shaped holder 13 are arranged on different side end face sides of the half ring 12a. As described above, the bending rod-shaped holders 13 are alternately arranged on the different side end face sides of the half ring 12a for each step, so that the thermal fluid flowing along the direction in which the plurality of heat exchange pipes 14 extend is one. By passing through a portion that has narrowed sharply at a location, the flow of the thermal fluid is prevented from deteriorating.
[0040]
Next, as shown in FIG. 5, after arranging the second-stage heat exchange pipes 14, the third-stage bent rod-shaped holders 13 are placed on the second-stage pipes in a crest and trough, respectively. The portion is placed so as to match the crest and trough formed by the second-stage heat exchanging pipe 14, and is welded and fixed to the half ring 12a. As a result, the second-stage heat exchange pipe 14 is firmly fixed to the half ring 12a.
[0041]
Next, as shown in FIG. 6, the third-stage pipe 14 and the fourth-stage bent bar-shaped holder 13 are sequentially placed. Subsequently, as shown in FIG. 7, a fourth-stage pipe and a fifth-stage bent bar-shaped holder are placed.
[0042]
Next, as shown in FIG. 8, when no more heat exchange pipes 14 can be placed on the inner peripheral side of the half ring 12a (located below), the half ring 12a is held. Since the tool 13 cannot be welded, the fifth-stage bent bar-shaped holder 13 is placed on the fourth-stage pipe. Then, the half ring 12b is placed on the heat exchange pipe 14 on the fourth stage from above. Then, the surface where the half ring 12a and the half ring 12b are joined is fixed by welding to form a circular ring of the half ring 12a and the half ring 12b. The 3rd to 5th stage bent bar-shaped holders 13 are welded and fixed alternately. Thereby, the multitubular heat exchanger 100 as shown in FIG. 9 is completed.
[0043]
FIG. 10 shows a state where the bent bar-shaped holder 13 is placed on the lowermost pipe 14 after the lowermost pipe 14 is placed in the trough of the bent bar-shaped holder. In addition, it can be seen that the gap X is formed between the bent bar-shaped holder 13 and the lowermost pipe 14. This gap X creates a passage in the direction of the flow of heat exchange steam around the heat exchange pipe 14 in the heat exchanger 100 shown in FIG. 1. Therefore, a baffle as shown in the prior art is used. Therefore, compared with the case where the heat exchange pipes are bundled, the steam pressure loss is reduced, that is, the flow of steam is improved, so that the heat exchange efficiency of the multi-tube heat exchanger 100 can be improved.
[0044]
Moreover, when using a baffle plate-like baffle in the prior art, it is necessary to center the insertion holes 112a and 112b, but according to the manufacturing method of the multi-tube heat exchanger 100 of the present embodiment, Since the bent rod-shaped holder 13 is used, it is not necessary to perform centering. Moreover, compared with the prior art, the time for inserting the heat exchanging pipe 14 is eliminated, so that the manufacturing time of the multitubular heat exchanger can be shortened.
[0045]
Further, according to the manufacturing method of the multi-tube heat exchanger 100 of the present embodiment, the outer peripheral surface of the heat exchanging pipe 14 as compared with the case where the heat exchanging pipe 14 is inserted into a small insertion hole. It is possible to suppress the formation of scratches on the surface.
[0046]
In the case of a conventional multi-tube heat exchanger, a tensile force is generated on the inner peripheral surface of the insertion hole during processing to remove the insertion hole of the baffle, and a work is required to remove the burr. However, according to the manufacturing method of the multitubular heat exchanger 100 of the present embodiment, since the baffle is not used, deburring performed after drilling the baffle becomes unnecessary.
[0047]
Further, according to the manufacturing method of multi-tube heat exchanger 100 of the present embodiment, the entire assembly is performed by sequentially placing a bundle of pipes for heat exchange from the top, so that an operator can insert the pipes. Therefore, it is not necessary to move for the work, so the work load is reduced.
[0048]
Moreover, according to the manufacturing method of the multi-tube heat exchanger 100 of the present embodiment, a plurality of long and light heat exchanging pipes 14 can be assembled at a time, so that the work efficiency is improved.
[0049]
Moreover, according to the manufacturing method of the multi-tubular heat exchanger 100 of this Embodiment, since the bending rod-shaped holder 13 can be added to arbitrary positions in the middle of an assembly, it is flexible for construction. Can be given. In addition, when the bending angle and pitch of the bent portion of the bending rod holder 13 are changed, the heat exchanging pipe 14 can be arranged obliquely with respect to the holder 13.
[0050]
Further, according to the multitubular heat exchanger 100 of the present embodiment, the holder 13 and the heat exchanging pipe (heat transfer pipe) 14 are in point contact so that foreign matter such as dust enters the gap X. Since it is difficult, it is prevented that the heat exchange efficiency of a heat exchanger falls.
[0051]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
[0052]
【The invention's effect】
According to the multi-tube heat exchanger, the multi-tube heat exchanger manufacturing method, and the multi-tube heat exchanger holder of the present invention, a plurality of holders are used on one of the halves for each stage. Thus, after arranging the heat exchange pipes at a distance from each other, a plurality of heat exchange pipes can be bundled by joining the other half part to one half member. Compared to the exchanger, the manufacturing time can be shortened, and inconveniences associated with the construction of the multi-tube heat exchanger are eliminated.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an overall configuration of a multitubular heat exchanger according to an embodiment.
FIG. 2 is a diagram for explaining a manufacturing process of the multi-tube heat exchanger according to the embodiment.
FIG. 3 is a diagram for explaining a manufacturing process of the multi-tube heat exchanger according to the embodiment.
FIG. 4 is a diagram for explaining a manufacturing process of the multi-tube heat exchanger according to the embodiment.
FIG. 5 is a diagram for explaining a manufacturing process of the multi-tube heat exchanger according to the embodiment.
FIG. 6 is a diagram for explaining a manufacturing process of the multi-tube heat exchanger according to the embodiment.
FIG. 7 is a diagram for explaining a manufacturing process of the multi-tube heat exchanger according to the embodiment.
FIG. 8 is a diagram for explaining a manufacturing process of the multi-tube heat exchanger according to the embodiment.
FIG. 9 is a completed perspective view of the multi-tube heat exchanger according to the embodiment.
FIG. 10 is a view for explaining a gap formed between the holder and the half ring of the multi-tube heat exchanger according to the embodiment and a gap formed between the holder and the heat exchange pipe. FIG.
FIG. 11 is a diagram for explaining a manufacturing process of a conventional multi-tube heat exchanger.
FIG. 12 is a diagram for explaining a manufacturing process of a conventional multi-tube heat exchanger.
FIG. 13 is a diagram for explaining a manufacturing process of a conventional multi-tube heat exchanger.
FIG. 14 is a diagram for explaining a manufacturing process of a conventional multi-tube heat exchanger.
[Explanation of symbols]
1 heat exchanging pipe bundle, 2 inflow fluid piping, 3 outflow fluid piping, 4 inflow steam piping, 5 outflow steam piping, 6 piping fixing member, 10 case, R1 arrow indicating steam flow, R2 for heat exchange Arrow indicating fluid flow, 11 tube plate, 11a, 11b insertion hole, 12a, 12b half ring, 13 bent rod-shaped holder, 14 heat exchange pipe, X gap.

Claims (9)

A plurality of pipes for heat exchange in which pipes through which the fluid to be heat exchanged are stacked in a plurality of stages;
A plurality of heat exchange pipes are provided separately for each of the stages so that all of the plurality of heat exchange pipes are spaced apart from each other, and the plurality of heat exchange pipes are held for each of the stages. A holding tool,
A multi-tube heat exchanger comprising: a member for bundling the plurality of heat exchange pipes by combining two halved members, and a restraining member to which the plurality of holding members are fixed.   A member for bundling the whole of the plurality of heat exchange pipes, provided near both ends of the plurality of heat exchange pipes, and a plurality of insertion holes into which the plurality of heat exchange pipes are respectively inserted. The multitubular heat exchanger according to claim 1, further comprising a second restraining member including   The multi-tube heat exchanger according to claim 1 or 2, wherein the holder is in point contact with the heat exchange pipe. The holder is formed by bending an elongated plate-like member or a wire member, and has a plurality of peak portions and a plurality of valley portions,
The multi-pipe heat exchanger according to any one of claims 1 to 3, wherein the plurality of heat exchange pipes are arranged at intervals from each other by being installed in each of the plurality of valleys.   5. The multitubular heat exchanger according to claim 1, wherein each of the plurality of holders is fixed to the restraining member by welding.   The multi-tube heat exchanger according to any one of claims 1 to 5, wherein the plurality of holders are alternately fixed to each of both end faces of the half member for each step.   The multi-tubular heat exchanger according to any one of claims 1 to 6, wherein the two halves are fixed to each other by welding. A plurality of heat exchange pipes in which pipes through which heat exchanged fluid is guided are stacked in a plurality of stages, and the plurality of heat exchange pipes are arranged at intervals from each other. A plurality of holders for holding the plurality of heat exchange pipes for each of the stages, and the first half member and the second half member are combined, A member for bundling the plurality of heat exchange pipes, the first restraining member to which the plurality of holding members are fixed, and a member for bundling the whole of the plurality of heat exchange pipes, A method of manufacturing a multi-tube heat exchanger comprising: a second restraining member provided in the vicinity of both ends of a plurality of heat exchange pipes and having a plurality of insertion holes into which the plurality of heat exchange pipes are inserted. Because
A heat exchange pipe for the lowermost stage is inserted into the insertion hole for the lowermost stage of one of the second restraining members, and the lowermost stage is fixed to the holder for the lowermost stage fixed to the first half member. A first step of installing a heat exchange pipe for use;
A second step of inserting the heat exchange pipe into the insertion hole corresponding to each stage and disposing the heat exchange pipe at intervals from each other using the holder;
A third step of fixing the first half member and the second half member by placing the second half member on the uppermost heat exchange pipe disposed in the second step; ,
A fourth step of fixing a holder other than the lowermost holder to the first half member and the second half member;
And a fifth step of inserting each of the plurality of heat exchange pipes bundled at a distance from each other into the other insertion hole of the second restraining means. Method.   In the fourth step, among the holders other than the lowermost stage holder, the first half member is fixed immediately after the holder is fixed to the first half member. And a holder that is fixed to the second half member is fixed to the second half member after the second half member and the first half member are fixed. The manufacturing method of the multitubular heat exchanger of Claim 8.

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