JP2017166781A - Heat exchanger, manufacturing method heat exchanger, and repair method of heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger which can repair a connecting part of a tube plate and a header from the outside, is easy in maintenance, and can inspect the connection reliability of the tube plate and the header from the outside while promoting size reduction and improving the connection reliability of the tube plate and the header, a manufacturing method of the heat exchanger, and a repair method of the heat exchanger.SOLUTION: A heat exchanger comprises a tube plate for fixing a heat transfer tube, and a header joined to the tube plate at a recess being the header having a protrusion and the recess. A penetration hole is formed at the recess.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat exchanger for exchanging heat between a first fluid flowing through a heat transfer tube and a second fluid flowing outside the heat transfer tube at a temperature different from that of the first fluid, and the heat exchange The present invention relates to a method for manufacturing a heat exchanger and a repair method for the heat exchanger.

  A heat exchanger that performs heat exchange between the first fluid and the second fluid is used in various fields, and various heat exchangers are used. Among these, a multi-tube heat exchanger may be used because a large heat transfer area can be obtained while having a compact size.

  The multi-tube heat exchanger may be operated by increasing the pressure of the first fluid flowing through the heat transfer tube. When the multi-tube heat exchanger is continuously operated for a long period of time, the tube plate for fixing the heat transfer tube and the first There is a problem that the connection reliability with the header that introduces the first fluid into the heat transfer tube and the header that receives the first fluid discharged from the heat transfer tube may not be sufficient.

  Therefore, among the plurality of heat transfer tubes, some of the heat transfer tubes are heat transfer tubes whose upper ends do not protrude from the upper tube plate, and other heat transfer tubes are heat transfer tubes whose upper ends protrude from the upper tube plate. A multi-tube heat exchanger has been proposed that sufficiently secures the strength of the joint between the heat transfer tube and the upper tube sheet, and reduces the retention of the first fluid on the surface of the upper tube sheet (Patent Literature). 1).

  However, in Patent Document 1, since only the peripheral edge of the tube sheet and the peripheral edge of the header are connected, there is still a case where further improvement in connection reliability between the tube sheet and the header is required.

  On the other hand, the multi-tube heat exchanger is required not only to improve the connection reliability between the tube plate and the header but also to be smaller. Therefore, a plurality of concave and convex portions are provided in the header, the header and the tube plate are joined by a plurality of concave portions, and the plurality of convex portions are used as flow paths for the first fluid in the header. It has been proposed not only to improve the connection reliability between the header and the header, but also to further reduce the size of the multi-tube heat exchanger.

  However, in the above multi-tube heat exchanger, there is a problem in the connection portion between the tube plate and the header as a result of continuous operation for a long time with the pressure of the first fluid flowing through the heat transfer tube being increased. When this occurs, there is a problem that repair cannot be performed from the outside of the multi-tube heat exchanger, and maintenance is complicated. Further, in the above multi-tube heat exchanger, the connection state between the tube plate and the header cannot be confirmed from the outside of the multi-tube heat exchanger, so the connection reliability between the tube plate and the header can be checked. There was a problem that I could not.

JP 2003-240482 A

  In view of the above circumstances, the present invention facilitates maintenance by reducing the size and improving the connection reliability between the tube plate and the header, and can repair the connection portion between the tube plate and the header from the outside. It is an object of the present invention to provide a heat exchanger capable of checking the connection reliability between a tube sheet and a header, a method for manufacturing the heat exchanger, and a repair method for the heat exchanger.

  An aspect of the present invention includes a header having a tube plate for fixing a heat transfer tube, a convex portion and a concave portion, and a header joined to the tube plate at the concave portion, and the through hole is formed in the concave portion. It is a heat exchanger provided.

  An aspect of the present invention is a heat exchanger in which a peripheral edge portion of the through hole is joined to the tube plate.

  According to an aspect of the present invention, a header having a convex portion and a concave portion provided with a through-hole is joined to the tube plate at the concave portion, and the inside of the heat transfer tube. And a method of manufacturing a heat exchanger that allows the convex portions to communicate with each other.

  The aspect of this invention is a manufacturing method of the heat exchanger which joins the peripheral part of the said through-hole with the said tube sheet.

  The aspect of the present invention is the above-described through-hole of the header having a concave portion joined to a tube plate to which the heat-transfer tube is fixed and provided with a through-hole, and a convex portion communicating with the inside of the heat-transfer tube. It is the repair method of the heat exchanger which joins a header and the said tube sheet again.

  The aspect of this invention is a repair method of the heat exchanger which joins the peripheral part of the said through-hole again with the said tube sheet.

  According to the aspect of the present invention, since the through hole is provided in the concave portion of the header joined to the tube plate, the tube plate and the header are reliably connected from the outside of the heat exchanger at the site of the through hole. Can do. In addition, even if there is a problem in the connection between the tube plate and the header as a result of continuous operation for a long time with the pressure of the first fluid flowing through the heat transfer tube increased, the penetration Maintenance can be easily performed from the outside of the heat exchanger at the hole. In addition, since the connection state between the tube plate and the header can be confirmed and inspected from the through hole portion, that is, from the outside of the heat exchanger, the connection reliability between the tube plate and the header from the outside of the heat exchanger Can be checked.

  Moreover, according to the aspect of the present invention, the concave portion and the convex portion are provided in the header, the header and the tube plate are joined in the concave portion, and the convex portion serves as the first fluid flow path in the header. The connection reliability between the tube sheet and the header is improved, and the heat exchanger is also downsized.

  According to the aspect of the present invention, since the peripheral edge portion of the through hole is joined to the tube plate, the joining strength between the header and the tube plate is improved.

  According to the aspect of the present invention, since the recess and the tube sheet can be joined through the through hole, the process of joining the header to the tube sheet, that is, the assembly process of the header and the tube sheet is simple, and thus heat exchange. The device is easy to manufacture.

  According to the aspect of the present invention, since the peripheral portion of the through hole is joined to the tube plate, a heat exchanger excellent in joining strength between the header and the tube plate can be easily manufactured.

  According to the aspect of the present invention, when a problem occurs in the connection portion between the tube plate and the header, a through hole is provided in the concave portion of the header joined to the tube plate, and the header and the tube plate are formed in the through hole. Are repaired by joining them again, so that the connection between the tube sheet and the header can be repaired from the outside of the heat exchanger, and as a result, the repair can be facilitated.

  According to the aspect of the present invention, since the peripheral portion of the through hole is joined again to the tube sheet, it is possible to perform repair that is simple and excellent in the joining strength between the header and the tube sheet.

It is side surface sectional drawing explaining the outline | summary of the edge part of the heat exchanger which concerns on the example of 1st Embodiment of this invention. It is a top plan view explaining the outline of the heat exchanger according to the first embodiment of the present invention. It is a top plan view explaining the outline of the heat exchanger according to the second embodiment of the present invention.

  Next, embodiments of the heat exchanger of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the heat exchanger 1 according to the first embodiment of the present invention includes a cylinder-side inlet (not shown) for a second fluid and a cylinder-side outlet (not shown) for a second fluid. A heat transfer pipe 16 through which the first fluid flows, a tube plate 15 for fixing the heat transfer pipe 16 at or near the end, and an end of the fuselage 17. And a header 11 provided in the above. The header 11 is provided with a first fluid inlet / outlet (not shown). The heat exchanger 1 is a multi-tube heat exchanger provided with a plurality of heat transfer tubes 16.

  The header 11 is a corrugated plate material in which a plate-like body is processed to be concavo-convex to form convex portions 12 and concave portions 13. The internal space of the convex portion 12 communicates with the heat transfer tube 16, and the first fluid can flow between the internal space of the convex portion 12 and the heat transfer tube 16. In the heat exchanger 1, the header 11 has a plurality of convex portions 12 (three in the drawing) and a plurality of concave portions 13 (two in the drawing). In the header 11, each concave portion 13 is joined to the tube plate 15 by a predetermined joining means 100, and each concave portion 13 is joined to the tube plate 15, so that the header 11 is the tube plate 15, and eventually the fuselage. 17 is fixed. Therefore, the header 11 is joined to the tube sheet 15 at a plurality of locations. The peripheral portion of the header 11 is separately joined to the peripheral portion of the tube plate 15 by a predetermined joining means 101.

  As shown in FIG. 2, each convex part 12 is linearly provided in the surface direction of the header 11, and the recessed part 13 provided between the adjacent convex parts 12 also respond | corresponds to the said aspect of the convex part 12. In addition, the header 11 is provided linearly in the surface direction. That is, in the heat exchanger 1, both the convex portion 12 and the concave portion 13 between the convex portions 12 are rectangular in plan view.

  In addition, a plurality (10 in the figure) of circular through holes 14 in plan view are arranged in each of the recesses 13, and the entire periphery of each through hole 14 is joined to the tube plate 15. Thus, the recess 13 is joined to the tube plate 15. By joining the whole peripheral part of the through-hole 14 with the tube sheet 15, the joining strength of the header 11 and the tube sheet 15 further improves. Accordingly, a portion of the tube plate 15 corresponding to the through hole 14 is in a form in which the tube plate 15 is exposed.

  The joining means 100 and 101 are not particularly limited, and examples thereof include welding, soldering, and brazing. As a welding method, laser welding, resistance welding, ultrasonic welding, or the like can be used.

  In the heat exchanger 1, since the through hole 14 is provided in the recess 13 of the header 11 joined to the tube plate 15, the operator can connect the tube plate from the outside of the heat exchanger 1 at the site of the through hole 14. 15 and the header 11 can be connected by the joining means 100 (in FIGS. 1 and 2, the connection is made at the peripheral edge of the through hole 14), so that the connection reliability between the tube sheet 15 and the header 11 is improved. Even if a problem occurs in the connection between the tube plate 15 and the header 11, the operator can connect the connection between the tube plate 15 and the header 11 from the outside of the heat exchanger 1 (FIGS. 1 and 2). Then, the peripheral part of the through-hole 14 can be repaired by the joining means 100, and as a result, maintenance becomes easy. Moreover, since the tube plate 15 is exposed from the site | part of the through-hole 14, and the connection part of the tube plate 15 and the header 11 can be visually recognized from the outer side of the heat exchanger 1, the connection state of the tube plate 15 and the header 11 Can be confirmed and inspected from the outside of the heat exchanger 1. Therefore, the connection reliability between the tube sheet 15 and the header 11 can be checked by performing a leak test or the like on the joint from the outside of the heat exchanger 1.

  Further, in the heat exchanger 1, not only the peripheral edge of the header 11 and the peripheral edge of the tube plate 15 are joined, but also the recess 11 is provided in the header 11, and the header 11 and the tube plate are formed in the recess 13. By connecting 15, connection reliability between the tube sheet 15 and the header 11 is improved. Moreover, in the heat exchanger 1, since the recessed part 13 is provided in the header 11, it is reduced in size.

  Next, a heat exchanger according to a second embodiment of the present invention will be described with reference to the drawings. In addition, about the same component as the heat exchanger which concerns on 1st Embodiment, it demonstrates using the same code | symbol.

  In the heat exchanger 1 according to the first embodiment, the through holes 14 having a round shape in plan view are arranged in the respective recesses 13, but instead of this, as shown in FIG. 3, the second embodiment In the heat exchanger 2 according to the example, a through hole 24 having a rectangular shape in plan view is arranged. Therefore, in the heat exchanger of the present invention, the shape of the through hole is not particularly limited, and can be appropriately selected according to the use situation.

  Further, in the heat exchanger 1 according to the first embodiment, the plurality of through holes 14 are arranged in the respective recesses 13, but instead, as shown in FIG. 3, the second embodiment is used. In the heat exchanger 2 according to the above, one through hole 24 is arranged in each recess 13. Therefore, in the heat exchanger of the present invention, the number of through holes is not particularly limited, and can be appropriately selected depending on the use situation. In the heat exchanger 2, the length in the longitudinal direction of the through hole 24 is the same as or substantially the same as the length in the longitudinal direction of the recess 13, and the entire periphery of the through hole 24 is joined to the tube plate. .

  Even in the heat exchanger 2, as in the heat exchanger 1 according to the first embodiment, the operator can connect the tube plate and the header 11 from the outside of the heat exchanger 2 at the site of the through hole 24. Connection reliability between the tube sheet and the header 11 is improved. When a problem occurs in the connection portion between the tube plate and the header 11, the operator can repair the connection portion between the tube plate and the header 11 from the outside of the heat exchanger 2 at the site of the through hole 24. it can. Further, in the heat exchanger 2 as well, as in the heat exchanger 1 according to the first embodiment, the tube plate is exposed from the portion of the through hole 24, and the connection portion between the tube plate and the header 11 is heat exchange. Since it can be visually recognized from the outside of the vessel 2, the connection state between the tube sheet and the header 11 can be confirmed and inspected from the outside of the heat exchanger 2.

  Next, the example of the manufacturing method of the heat exchanger of this invention is demonstrated. Here, the heat exchanger 1 according to the first embodiment will be described as an example.

  First, the header 11 having the concave portion 13 provided with the through hole 14 and the convex portion 12 is overlapped on the tube plate 15 to which the heat transfer tube 16 is fixed. At this time, the convex portion 12 corresponds to a portion of the tube plate 15 to which the heat transfer tube 16 is attached, and the concave portion 13 is the tube plate 15 so that the inside of the heat transfer tube 16 and the internal space of the convex portion 12 communicate with each other. Among these, the header 11 is overlapped with the tube plate 15 so as to correspond to a portion where the heat transfer tube 16 is not attached. Next, the heat exchanger 1 is manufactured by assembling the header 11 and the tube plate 15 by joining the peripheral edge portion of the through-hole 14 disposed in the recess 13 with the tube plate 15 by the predetermined joining means 100. Can do.

  In the heat exchanger 1, since the header 11 and the tube plate 15 can be joined from the outside of the heat exchanger 1 at the site of the through hole 14, the joining process of the header 11 and the tube plate 15 is simple. Manufacture of the heat exchanger 1 is easy.

  Next, the example of the repair method of the heat exchanger of this invention is demonstrated. Here, the heat exchanger 1 according to the first embodiment will be described as an example.

  For example, if the connection state of the connection part between the tube plate 15 and the header 11 is confirmed and inspected from the outside of the heat exchanger 1 (the part of the through-hole 14), By joining the peripheral part of the through-hole 14 corresponding to a certain part from the outer side of the heat exchanger 1 again with the tube plate 15 with the predetermined joining means 100, the tube plate 15 of the heat exchanger 1 and the header 11 are connected. The connection can be repaired.

  In the heat exchanger 1, the connection state between the tube plate 15 and the header 11 can be confirmed and inspected from the outside of the heat exchanger 1 at the site of the through hole 14. Since the connection portion between the tube plate 15 and the header 11 can be repaired from the outside, the connection portion between the tube plate 15 and the header 11 can be easily repaired.

  Next, another embodiment of the heat exchanger of the present invention will be described. In each of the above embodiments, the entire periphery of the through hole is joined to the tube plate, so that the header and the tube plate are joined. A mode in which a part is joined to the tube sheet may be employed. Further, in the first embodiment, all the through holes are joined to the tube plate. However, some of the plurality of through holes are joined to the tube plate depending on the usage state of the heat exchanger. But you can.

  In each of the above-described embodiments, the convex portion is provided linearly in the surface direction of the header, and the concave portion formed between the convex portions is also provided linearly in the surface direction of the header according to the above aspect of the convex portion. However, the shape of the projection in plan view and the shape of the recess in plan view are not particularly limited, and may be, for example, a shape having a bent portion or a circular shape. Moreover, as another shape of the through hole in plan view, for example, a rounded rectangle can be cited. Further, both the first fluid and the second fluid may be in a liquid phase or a gas phase.

  In addition, the structure of the header of each said embodiment can also be used as a container of a planar heat pipe, for example. That is, it is composed of a first plate-like body that is processed with unevenness and a through-hole is provided in the recess, and a second plate-like body that is opposite to the first plate-like body and is not processed with unevenness. It can also be set as the planar heat pipe which has a container with which the 1st plate-shaped object and the 2nd plate-shaped object were joined in a part.

  In the heat exchanger of the present invention, the connection reliability between the tube plate and the header is improved, and the connection reliability between the tube plate and the header can be inspected from the outside. Further, the connection between the tube plate and the header is possible. Can be repaired, especially in fields where the pressure of the fluid circulating in the heat transfer tube is high, such as in the field of recovering waste heat by mounting in automobiles, in the field of heat pump heating, etc. high.

DESCRIPTION OF SYMBOLS 1, 2 Heat exchanger 11 Header 12 Convex part 13 Concave part 14 Through-hole 15 Tube plate 16 Heat exchanger tube

Claims (6)

  A heat exchange comprising: a tube plate for fixing a heat transfer tube; a header having a convex portion and a concave portion, wherein the header is joined to the tube plate at the concave portion, and the through hole is provided in the concave portion. vessel.   The heat exchanger according to claim 1, wherein a peripheral edge portion of the through hole is joined to the tube plate.   A header having a convex portion and a concave portion provided with a through-hole is joined to the tube plate at the concave portion, and the convex portion is communicated with the inside of the heat transfer tube. Manufacturing method of heat exchanger.   The manufacturing method of the heat exchanger of Claim 3 which joins the peripheral part of the said through-hole with the said tube sheet.   In the through-hole of the header, which is joined to the tube plate to which the heat transfer tube is fixed and has a through hole, and a convex portion communicating with the inside of the heat transfer tube, the header and the tube plate Repair method of heat exchanger to join again.   The repair method of the heat exchanger of Claim 5 which joins the peripheral part of the said through-hole again with the said tube sheet.

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