JP2010284684A - Method and apparatus for inserting heat transfer tube for heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress scratches generated on the lower surface in end parts of a heat transfer tube when manufacturing a heat exchanger sideways. <P>SOLUTION: By inserting a bar-like guide 9 in a skewered fashion into coaxial tube holes 4, 5 formed respectively on a tube plate 2 and a baffle plate 3, and connecting one end of the heat transfer tube 6 to the top end of the guide 9 and moving the heat transfer tube 6 and the guide 9 to the side of the rear end of the guide 9, the guide 9 is pulled out from the respective tube holes 4, 5 and also the heat transfer tube 6 is inserted into the respective tube holes 4, 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a heat transfer tube insertion method for a heat exchanger and a heat transfer tube insertion device for a heat exchanger that insert a heat transfer tube into the tube holes of a tube plate and a baffle plate.

  As shown in FIGS. 7 and 8, the shell and tube type heat exchangers 40 and 41 are composed of heat transfer tubes 6 and 32, a tube plate 2, a baffle plate 3, a body plate 42 and 43, and the heat transfer tubes 6 and 32. Is supported by the tube plate 2 and the baffle plate 3. In addition, the heat transfer tubes 6 and 32 include those formed in a straight line (see FIG. 7) and those formed in a U-shape (see FIG. 8).

  Since it is the heat exchange performance between the fluids inside and outside the heat transfer tubes 6 and 32 that determines the performance of the heat exchangers 40 and 41, the most important thing to manufacture in the production of the heat exchangers 40 and 41 is the heat transfer tubes 6 and 32. It is a process to handle. As shown in FIG. 9, in the process of handling the heat transfer tubes 6 and 32, the baffle plate 3 and the tube plate 2 are arranged in a line so that the respective tube holes 4 and 5 of the baffle plate 3 and the tube plate 2 are coaxial. There is a step of arranging and inserting the heat transfer tubes 6 and 32 into the tube holes 4 and 5 of the baffle plate 3 and the tube plate 2.

  In this process, the baffle plate 3 and the tube plate 2 are arranged in the horizontal direction and the heat exchangers 40 and 41 are manufactured in the horizontal direction, and the baffle plate 3 and the tube plate 2 are arranged in the vertical direction and the heat exchangers 40 and 41 are arranged. There is a method of making it vertically. However, since the method of manufacturing the heat exchangers 40 and 41 in the vertical direction requires an extremely large factory with a high ceiling, a method of manufacturing in the horizontal direction is generally employed.

JP-A-8-224629

  By the way, when manufacturing the heat exchangers 40 and 41 sideways, when the heat transfer tubes 6 and 32 are inserted into the tube plate 2 and the baffle plate 3, the heat transfer tubes 6 and 32 are bent by their own weight and installed at predetermined positions. It was sometimes difficult. For this reason, as shown in FIG. 10, even if the conical insertion jig 44 is installed at the end of the heat transfer tubes 6 and 32 on the insertion side and the heat transfer tubes 6 and 32 are bent by their own weight, 5 was easy to enter.

  However, there is a problem that friction occurs between the heat transfer tubes 6 and 32 and the tube holes 4 and 5 particularly on the lower surface of the end portion on the insertion side of the heat transfer tubes 6 and 32, thereby causing scratches.

  Accordingly, an object of the present invention is to solve the above-described problems and to suppress a scratch generated on the lower surface of the end portion of the heat transfer tube when the heat exchanger is manufactured in a horizontal direction, and a heat transfer tube insertion method for a heat exchanger and a heat transfer tube for a heat exchanger To provide an insertion device.

  In order to solve the above problems, the present invention arranges a tube plate for a heat exchanger having a plurality of tube holes through which a heat transfer tube is inserted and a plurality of baffle plates, and then arranges the tube holes of the tube plate and the tubes of the baffle plate. In the heat exchanger tube insertion method for a heat exchanger in which the heat transfer tube is inserted into the hole, a rod-shaped guide is inserted in a skewered manner into the coaxial tube hole of the tube plate and the baffle plate, and the end of the heat transfer tube is inserted into the tip of the guide. One end is connected, and the heat transfer tube and the guide are moved to the rear end side of the guide, thereby pulling out the guide from each tube hole and inserting the heat transfer tube into each tube hole.

  In order to insert the heat transfer tube into the tube hole of the tube plate and the tube hole of the baffle plate after arranging a tube plate for a heat exchanger having a plurality of tube holes through which the heat transfer tube is inserted and a plurality of baffle plates. In the heat exchanger tube insertion device for a heat exchanger, a vertically movable base, a guide bearing provided on the base so as to be slidable in the horizontal direction, and the guide bearing moved in a horizontal direction perpendicular to the sliding direction of the guide bearing It is provided with a rod-shaped guide that can be inserted through the tube hole and a connecting jig that is provided at the tip of the guide and is detachably connected to the end of the heat transfer tube.

  It is preferable to provide a stopper that restricts the movement of the guide when the heat transfer tube is moved to a predetermined position together with the guide.

  The connection jig may be formed of a fitting member that is fitted into the heat transfer tube.

  ADVANTAGE OF THE INVENTION According to this invention, when producing a heat exchanger sideways, the abrasion which arises in the end part lower surface of a heat exchanger tube can be suppressed.

FIG. 1 is a perspective view of a side surface of a heat exchanger tube insertion apparatus for a heat exchanger showing an embodiment of the present invention as viewed obliquely from above. FIG. 2 is an enlarged view of a main part of FIG. FIG. 3 is a front sectional view of the guide bearing. FIG. 4 is an explanatory view showing the insertion procedure of the heat transfer tubes in the order of (a) to (e). FIG. 5A is a cross-sectional view of a heat exchanger in which the ends of the tube plate and the heat transfer tube are flush with each other, and FIG. 5B is a heat exchanger in which the end of the heat transfer tube protrudes from the tube plate. FIG. FIG. 6 is an explanatory side view of a heat exchanger tube insertion device for a heat exchanger showing another embodiment. FIG. 7 is a side sectional view of a heat exchanger having a linear heat transfer tube. FIG. 8 is a side sectional view of a heat exchanger having a U-shaped heat transfer tube. FIG. 9 is an explanatory view for explaining a conventional heat transfer tube insertion method. FIG. 10 is an enlarged view of a main part of FIG.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a heat exchanger tube insertion device for a heat exchanger, FIG. 2 is an enlarged view of a tip portion of a guide, and FIG. 3 is a sectional view of a guide bearing.

  As shown in FIGS. 1 and 4A, the heat exchanger tube insertion device 1 for a heat exchanger has a heat exchanger tube 6 when a straight heat exchanger tube 6 is inserted into the tube holes 4 and 5 of the tube plate 2 and the baffle plate 3. The table 7 can be moved up and down, the guide bearing 8 is provided on the platform 7 so as to be slidable in the horizontal direction (left-right direction), and the guide bearing 8 has a sliding direction of the guide bearing 8. A rod-shaped guide 9 that is provided so as to be movable in a horizontal direction (front-rear direction) perpendicular to each other and inserted into the tube holes 4 and 5, and is detachably connected to the end of the heat transfer tube 6 provided at the tip of the guide 9. The connecting jig 10 and a stopper 11 that restricts the movement of the guide 9 when the heat transfer tube 6 is moved to a predetermined position together with the guide 9 are configured.

  The tube plate 2 is a metal plate for fixing the end of the heat transfer tube 6 and is formed in a disc shape. The tube plate 2 is formed with a plurality of tube holes 4 for inserting the heat transfer tubes 6. After the heat transfer tubes 6 are inserted into the tube holes 4, the tube plate 2 and the heat transfer tubes 6 are welded. The heat tube 6 is fixed. The baffle plate 3 is a plate for supporting an intermediate portion of the heat transfer tube 6 and is formed in a disc shape with a part cut away. The baffle plate 3 is formed with a plurality of tube holes 5 into which the heat transfer tubes 6 are inserted. The tube hole 5 of the baffle plate 3 is formed to have a slightly larger diameter than the tube hole 4 of the tube plate 2 and supports the heat transfer tube 6. The heat transfer tube 6 is made of a metal such as copper having excellent heat transfer properties, and is formed with a small thickness in order to obtain high heat transfer properties.

  The gantry 7 includes a support frame portion 12 formed in a rectangular frame shape in plan view and a leg portion 13 that supports the support frame portion 12 so as to be movable up and down. A pair of leg portions 13 are provided apart from each other in the longitudinal direction of the support frame portion 12 (moving direction of the guide 9). The leg portion 13 is formed in a rod shape and has a pivot leg 14 provided at one end of the support frame portion 12 so as to be pivotable. The leg portion 13 is formed in a rod shape having substantially the same length as the pivot leg 14 and pivots in the center in the longitudinal direction. The leg 14 includes a slide leg 15 that is rotatably provided and has one end slidably engaged with the bottom surface of the support frame portion 12. The rotary leg 14 and the slide leg 15 are provided with a drive device (not shown) for adjusting the angle of the slide leg 15 with respect to the rotary leg 14. The support frame portion 12 is moved up and down by increasing or decreasing the angle.

  The guide bearing 8 is for guiding the guide 9 so as to be movable in the axial direction, and a plurality of guide bearings 8 are provided on the support frame portion 12 so as to be separated in the front-rear direction. As shown in FIGS. 1 and 3, the guide bearing 8 includes a casing 16 that is slidably provided on the support frame portion 12, and a guide roller 17 that is rotatably provided in the casing 16 and guides the guide 9. Consists of. Three guide rollers 17 are arranged at equal intervals on a concentric circle with the guide 9 as the center, and support the guide 9 so as to be movable only in the axial direction.

  The guide 9 is formed in a rod shape longer than the heat transfer tube 6 and has substantially the same diameter as the heat transfer tube 6, and is inserted into the tube plate 2 and all the baffle plates 3 in a skewered manner. Further, the guide 9 is formed of a rigid body that is sufficiently harder than the heat transfer tube 6 and can be easily inserted into the coaxial tube holes 4 and 5.

  As shown in FIG. 2, the connection jig 10 includes a fitting member 18 that is fitted into the heat transfer tube 6. The fitting member 18 is made of a soft resin such as rubber and is formed in a conical shape.

  The stopper 11 restricts the backward movement of the guide 9. The stopper 11 is provided on the guide bearing 8 so as to extend rearward. The stopper 11 is provided on the mounting frame 19 so as to be slidable up and down. And a locking portion 20 that restricts the backward movement of the guide 9 when the guide 9 is positioned.

  Next, a method for inserting the heat transfer tube 6 into the tube plate 2 and the baffle plate 3 will be described.

  When the heat transfer tube 6 is inserted into the tube plate 2 and the baffle plate 3, as shown in FIG. 4 (a), the tube plate 2 and the plurality of baffle plates 3 are previously arranged so that the respective tube holes 4, 5 are coaxial. Are arranged so that the tube plate 2 is positioned at the end of the row, and the heat exchanger heat transfer tube inserting device 1 is disposed at a position facing the tube plate 2. At this time, the support rods 21 are inserted through some of the tube holes 4 and 5, and the arrangement of the tube plate 2 and the baffle plate 3 is fixed. Further, the locking portion 20 of the stopper 11 is moved downward so as to be disengaged from the extension line of the guide 9 so as not to interfere with the guide 9.

  Thereafter, the gantry 7 is moved up and down so that the guide 9 of the heat exchanger tube insertion device 1 for the heat exchanger is positioned coaxially with the tube holes 4 and 5 into which the heat exchanger tube 6 is to be inserted, and the guide bearing 8 is slid in the horizontal direction. The guide 9 is moved to the tube plate 2 side, and the guide 9 is inserted into the tube hole 4 of the tube plate 2 and the tube hole 5 of each baffle plate 3.

  As shown in FIG. 4B, when the guide 9 is inserted into the tube holes 4 and 5 of the tube plate 2 and the baffle plate 3 in a skewered manner, the fitting member 18 is moved to the heat transfer tube as shown in FIG. The guide 9 is connected to the heat transfer tube 6 by being inserted into one end of the heat transfer tube 6. Further, the locking portion 20 of the stopper 11 is moved upward so as to be positioned on the extension line of the guide 9.

  Thereafter, the integrated heat transfer tube 6 and guide 9 are moved to the rear end side of the guide 9. As a result, the guide 9 is pulled out from the tube holes 4 and 5, and the heat transfer tubes 6 are inserted into the tube holes 4 and 5. Compared to the heat transfer tube 6, the rigidity of the guide 9, which is stronger, prevents the heat transfer tube 6 from being bent, and the possibility that the outer peripheral surface of the heat transfer tube 6 is damaged is lower than in the conventional case.

  As shown in FIG. 4 (d), when the rear end of the guide 9 comes into contact with the locking portion 20 of the stopper 11, the fitting member 18 is removed from the heat transfer tube 6 to separate the guide 9 and the heat transfer tube 6. 5A, the tube plate 2 and the end of the heat transfer tube 6 are welded, the diameter of the heat transfer tube 6 in the tube plate 2 is increased, and the heat transfer tube 6 is fixed to the tube plate 2. To do.

  In the case of a heat exchanger in which the end portion of the heat transfer tube 6 protrudes from the tube plate 2 as shown in FIG. 5B, the outer peripheral portion of the heat transfer tube 6 and the tube plate 2 are welded, The diameter of the heat transfer tube 6 in the tube plate 2 is expanded.

  Thereafter, as shown in FIG. 4 (e), the gantry 7 is moved up and down, the guide bearing 8 is moved in the left-right direction, and the guide 9 is moved on the axis of the tube holes 4 and 5 into which the heat transfer tubes 6 are to be inserted. The heat transfer tube 6 is inserted into the tube holes 4 and 5 by repeating the above procedure.

  In this way, the rod-shaped guide 9 is inserted into the tube holes 4 and 5 on the same axis of the tube plate 2 and the baffle plate 3 in a skewered manner, one end of the heat transfer tube 6 is connected to the tip of the guide 9, By moving the guide 9 to the rear end side of the guide 9, the guide 9 is pulled out from the tube holes 4 and 5 and the heat transfer tube 6 is inserted into the tube holes 4 and 5. It can be supported by the guide 9, the bending of the heat transfer tube 6 can be suppressed, and the lower end surface of the heat transfer tube 6 can be prevented from being rubbed and damaged by the baffle plate 3 or the tube plate 2.

  Further, the gantry 7 that can be moved up and down, the guide bearing 8 that is provided on the gantry 7 so as to be slidable in the horizontal direction, and the guide bearing 8 that is provided so as to be movable in the horizontal direction perpendicular to the sliding direction of the guide bearing 8. A heat exchanger tube insertion device for a heat exchanger, comprising a rod-shaped guide 9 for insertion into the holes 4 and 5 and a connecting jig 10 provided at the tip of the guide 9 and detachably connected to the end of the heat transfer tube 6 1 is configured, the guide 9 can be easily moved on the axis of the tube holes 4 and 5 with a simple structure, and the heat transfer tube 6 is easily inserted into the tube holes 4 and 5 of the tube plate 2 and the baffle plate 3. In addition, it is possible to suppress scratches on the lower surface of the end portion of the heat transfer tube 6.

  Since the heat exchanger tube insertion device 1 for a heat exchanger includes the stopper 11 that restricts the movement of the guide 9 when the heat exchanger tube 6 is moved to a predetermined position together with the guide 9, the position of the end of the heat exchanger tube 6 can be easily set. Can be aligned.

  Since the connecting jig 10 includes the fitting member 18 fitted into the heat transfer tube 6, the heat transfer tube 6 and the guide 9 can be easily connected with a simple structure.

  Although the gantry 7 includes the rotating leg 14 and the slide leg 15, the present invention is not limited to this. For example, it is good also as what has a telescopic leg (not shown) which consists of jacks.

  Although the fitting member 18 is made of a soft resin, it is composed of an airbag (not shown) that expands and contracts like a balloon and an air supply device (not shown) that supplies air to the airbag. It may be, or it may be mechanically expanded or contracted.

  As shown in FIG. 8, when the heat transfer tube 32 is formed in a U shape, the heat transfer tube insertion device 30 for heat exchanger has a pair of rod-shaped guides 9 as shown in FIG. At the same time, it is preferable to have a guide bearing 8 for guiding these guides 9 in the axial direction. In addition, the heat exchanger tube insertion device 30 for heat exchanger may have a connection portion 31 for physically connecting these guides 9 and a drive device (not shown) for moving these guides 9 in synchronization. It is good. The drive device may be, for example, a device that causes the guide rollers 17 of the respective guide bearings 8 to rotate forward or backward simultaneously.

DESCRIPTION OF SYMBOLS 1 Heat exchanger tube insertion apparatus 2 for heat exchangers Tube plate 3 Baffle plate 4 Tube hole 5 Tube hole 6 Heat transfer tube 7 Base 8 Guide bearing 9 Guide 10 Connecting jig 11 Stopper 18 Inserting member

Claims (4)

  A heat exchanger for inserting a heat transfer tube into a tube hole of the tube plate and a tube hole of the baffle plate after arranging a tube plate for a heat exchanger having a plurality of tube holes and a plurality of baffle plates through which the heat transfer tube is inserted. In the heat transfer tube insertion method, a rod-shaped guide is inserted in a skewered manner into the coaxial tube hole of the tube plate and the baffle plate, one end of the heat transfer tube is connected to the tip of the guide, and the heat transfer tube and the guide A heat exchanger tube insertion method for a heat exchanger, wherein the guide is removed from each tube hole by moving the guide to the rear end side of the guide, and the heat transfer tube is inserted into each tube hole.   After arranging a tube plate for a heat exchanger having a plurality of tube holes through which the heat transfer tube is inserted and a plurality of baffle plates, heat for inserting the heat transfer tube into the tube hole of the tube plate and the tube hole of the baffle plate In the heat exchanger tube insertion device for an exchanger, a vertically movable base, a guide bearing that is slidable in the horizontal direction on the base, and a guide bearing that is movable in a horizontal direction perpendicular to the sliding direction of the guide bearing A heat exchanger comprising: a rod-shaped guide provided to be inserted through the tube hole; and a connecting jig provided at a tip of the guide and detachably connected to an end of the heat transfer tube. Heat transfer tube insertion device.   The heat exchanger tube insertion device for a heat exchanger according to claim 2, further comprising a stopper for restricting movement of the guide when the heat transfer tube is moved to a predetermined position together with the guide.   The heat transfer tube insertion device for a heat exchanger according to claim 2 or 3, wherein the connection jig is formed by a fitting member fitted into the heat transfer tube.

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