JP2014076471A - Jig for welding header and air cooling heat exchanger manufacturing method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for welding a header which enables an operator to easily and promptly weld the header to a heat exchanger core.SOLUTION: A jig 1 for welding a header is used for connecting a header 60 to a heat exchanger core 50 including multiple tubes by welding and includes: multiple rotary members 10 which are respectively formed into annular shapes; connection members 20 which connect the multiple rotary members 10 so that the multiple rotary members are spaced away from each other in an axial direction; and holding members 30 which hold the heat exchanger core 50 along the connection members 20.

Description

  The present invention relates to a header welding jig for connecting a header to a heat exchanger core by welding, and an air-cooled heat exchanger manufacturing method using the same.

  As a conventional air-cooled heat exchanger, a heat exchanger core having a plurality of tubes is provided, and by providing headers at both ends of the heat exchanger core, a flow path for fluid passing through the tubes is formed, and a cooling fan A configuration is known in which heat is exchanged between cooling air supplied to the outside of the tube by operation and a high-temperature fluid passing through the tube (for example, Patent Document 1). In such an air-cooled heat exchanger, attachment of the header to the heat exchanger core is generally performed by fixing the header body to the header plate to which the tube is connected by brazing or welding. (For example, patent document 2).

No. 1-41030 JP 2005-114192 A

  Air-cooled heat exchangers are not only small ones for vehicles and homes, but also large ones used for cooling steam in municipal waste incineration plants and generating cooling water in oil refineries and petrochemical plants. There is also a thing, and the need for enlargement is increasing in recent years. However, when the header is welded to the core of such a large air-cooled heat exchanger, the operator climbs on the heat exchanger core while lifting the heat exchanger core with a crane or the like and sequentially changing the direction. In some cases, it was necessary to work, and the work was complicated.

  Accordingly, an object of the present invention is to provide a header welding jig that can quickly and easily weld a header to a heat exchanger core. Moreover, this invention makes it the further objective to provide the manufacturing method of the air cooling type heat exchanger which can manufacture an air cooling type heat exchanger efficiently using said jig | tool for header welding.

  The object of the present invention is a header welding jig for welding a header to a heat exchanger core having a plurality of tubes by welding, and a plurality of rotating members formed in an annular shape, This is achieved by a header welding jig including a connecting member that connects the rotating members with an interval in the axial direction, and a holding member that holds the heat exchanger core along the connecting member.

  In this header welding jig, the rotating member is preferably configured by annularly joining a plurality of curved divided members, and the holding member is mounted on which the heat exchanger core is mounted It is preferable to include a member and a locking member that locks both side edges of the heat exchanger core mounted on the mounting member.

  Moreover, the object of the present invention is a method of manufacturing an air-cooled heat exchanger using the header welding jig, wherein a header is temporarily attached to an end of a heat exchanger core having a plurality of tubes. This is achieved by a method of manufacturing an air-cooled heat exchanger comprising: holding the heat exchanger core on the holding member in a state; and performing main welding of the header while rotating the rotating member.

  ADVANTAGE OF THE INVENTION According to this invention, the jig | tool for header welding which can perform the welding of the header with respect to a heat exchanger core quickly and easily can be provided, and also using this jig | tool for header welding, an air cooling type heat exchanger The manufacturing method of the air-cooling type heat exchanger which can be manufactured efficiently can be provided.

It is a side view of the jig for header welding concerning one embodiment of the present invention. It is a top view of the jig for header welding shown in FIG. It is a front view of the jig for header welding shown in FIG. It is a principal part perspective view which shows an example of the heat exchanger core attached to the jig | tool for header welding shown in FIG. It is process sectional drawing for demonstrating the manufacturing method of the air-cooling type heat exchanger which concerns on one Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of a header welding jig according to an embodiment of the present invention, and FIGS. 2 and 3 are a plan view and a front view of the header welding jig shown in FIG. 1, respectively. As shown in FIGS. 1 to 3, the header welding jig 1 includes a rotating member 10, a connecting member 20, and a holding member 30. As shown by a two-dot chain line in FIG. 1, the heat exchanger core 50. Can be held such that the longitudinal direction is along the connecting member 20.

  The rotating member 10 is formed in an annular shape, and two rotating members 10 are arranged at intervals in the axial direction. Each rotating member 10, 10 is supported by turning roller devices 100, 100 that are individually installed on the floor surface F so that the axis is horizontal. The turning roller device 100 includes a plurality of rotating rollers 102 and 102 that support the rotating member 10, and can rotate the rotating member 10 along the outer circumferential direction. In one of the turning roller devices 100, a rotating roller 102 is connected to an electric motor 104 via a speed reducer (not shown) and the like. It can be stopped at the rotational position. The shape of the rotating member 10 is preferably an annular shape as in the present embodiment, but the shape is not particularly limited as long as it can be rotated by an external force. For example, the rotating member 10 is rotationally driven by the turning roller device 100. In such a case, the shape may be any shape having an outer peripheral surface curved in a necessary rotation range. Three or more rotating members 10 can be provided along the axial direction, which is particularly effective when the heat exchanger core 50 is long.

  The rotating member 10 includes two divided members 12 and 14 formed in an arc shape. The dividing members 12 and 14 include ribs 121 and 141 provided along the inner peripheral surface, and coupling portions 122 and 122; 142 and 142 provided so as to protrude inward from both ends in the bending direction. The coupling parts 122 and 122; 142 and 142 are coupled to each other with a coupling tool such as a bolt so that the whole is formed into an annular shape. T-shaped reinforcing members 123 and 143 are respectively fixed to the inner peripheral surfaces of the divided members 12 and 14 in order to increase rigidity, and a heat exchanger core 50 described later is interposed between the reinforcing members 123 and 143. A space that can be accommodated is formed. One split member 14 is provided with an attachment portion 144 to which the connecting member 20 is attached. The rotating member 10 can also be configured by combining three or more curved divided members. Alternatively, when the heat exchanger core 50 is inserted into the rotating member 10 in the axial direction, the heat exchanger core 50 does not necessarily have to be divided.

  The connecting member 20 is made of, for example, H-shaped steel, and connects the two rotating members 10 and 10 so that their axes coincide with each other. In the present embodiment, the two rotating members 10 are connected by two connecting members 20 that extend parallel to each other along a horizontal plane. However, the number and arrangement of the connecting members 20 are not particularly limited as long as the two rotating members 10 and 10 rotating can be prevented from being twisted and rotated together. The connecting member 20 is preferably detachably or slidably attached to the attachment portion 144 so that the interval between the two rotating members 10 and 10 can be adjusted according to the length of the heat exchanger core 50.

  The holding member 30 includes a mounting member 32 suspended between the two connecting members 20 and 20 and a pair of locking members 34 and 34 provided to face both sides of the mounting member 32. A plurality of connecting members 20 and 20 are provided at appropriate intervals along the longitudinal direction of the two connecting members 20 and 20. The mounting member 32 has a mounting surface on which the heat exchanger core 50 is mounted on the upper surface side. The locking member 34 includes an upright block 35 provided so as to rise from the mounting surface of the mounting member 32, and a claw plate 36 detachably provided at the tip of the upright block 35. Each holding member 30 locks both side edges of the heat exchanger core 50 mounted on the mounting member 32 along the two connecting members 20 and 20 with a pair of locking members 34 and 34, respectively. Can be held. At least one of the locking members 34 can be attached to and detached from or moved from the mounting member 32 so that the distance between the pair of locking members 34 and 34 can be adjusted according to a plurality of types of heat exchanger cores 50 having different widths. It is preferable to be able to attach.

  The heat exchanger core 50 held by the header welding jig 1 having the above-described configuration may be formed by bundling a plurality of tubes through which a fluid passes. In particular, header plates are connected to both ends of the plurality of tubes. The configuration is preferred. For example, the heat exchanger core 50 shown in the perspective view of the main part in FIG. 4 has a plurality of fin tubes for each hole 54a of the rectangular header plate 54 having a large number of holes 54a arranged in a matrix. The ends of 52 are connected by welding, and the fin tubes 52 are integrated by a tube keeper (not shown). When connecting the header 60 to such a heat exchanger core 50, for example, a pair of long plates 62, 62 and a pair of short plates 64, 64 are connected to the periphery of the header plate 54 by temporary welding, A partition plate (not shown) is provided in advance inside the frame formed by the pair of long plates 62 and 62 and the pair of short plates 64 and 64, and then an end plate 66 is provided at the opening of the frame. It is preferable that the header 60 is temporarily attached to the end of the heat exchanger core 50 by connecting the two by temporary welding.

  Next, a method for manufacturing an air-cooled heat exchanger using the header welding jig 1 of the present embodiment will be described with reference to FIG. First, as shown in FIG. 5A, one split member 14 constituting the rotating member 10 is mounted on the turning roller device 100 so that the opening position is upward with the other split member 12 removed. To do. Then, with the nail plate removed from the standing blocks 35, 35 constituting the holding member 30, the heat exchanger core 50 with the header 60 temporarily attached as shown in FIG. Is lowered and placed on the placement surface 32.

  Thereafter, as shown in FIG. 5 (b), the claw plates 36, 36 are attached to the standing blocks 35, 35, and the heat exchanger core 50 is locked by the locking members 34, 34, and one of the divided members. The other split member 12 is attached to 14. Thereby, while the heat exchanger core 50 is hold | maintained by the holding member 30, the rotation member 10 will be in the state which can rotate. In the state shown in FIG. 5B, since the long side portion L of the header 60 is located at the upper part, the operator rides a lifter or the like and performs the main welding of the header 60 along the long side portion L. Can do.

  After the main welding of the long side portion L is completed, the rotating member 10 is rotated 90 degrees in the direction of the arrow as shown in FIG. Thereby, since the short side part S of the header 60 is located in the upper part, the operator can perform the main welding of the header 60 along the short side part S continuously. Thus, the entire header 60 can be welded to the heat exchanger core 50 by performing the main welding of the two long side portions L and the two short side portions S while rotating the rotating member 10 by 90 degrees. it can. An air-cooled heat exchanger can be manufactured by welding the header 60 to the opposite end of the heat exchanger core 50 by the same procedure. Although the shape of the header 60 is a case shape in the present embodiment, it may be another shape such as a cylindrical shape, and the header 60 is welded to the heat exchanger core 50 while rotating the rotating member 10. it can.

  According to the header welding jig 1 of the present invention, the plurality of rotating members 10 are connected by the connecting member 20 with an interval in the axial direction, and the heat exchanger core 50 is connected to the connecting member 20 by the holding member 30. Therefore, even if the heat exchanger core 50 is long, deformation such as torsion accompanying rotation of the rotating member 10 can be suppressed. Therefore, it is easy to make the heat exchanger core 50 have a desired rotational posture, and the header 60 can be welded to the heat exchanger core 50 quickly and reliably, so that the air-cooled heat exchanger is efficiently manufactured. be able to.

  The rotating member 10 is configured to be divided into a plurality of divided members 12 and 14, and the holding member 30 is placed on the placement member 32 on which the heat exchanger core 50 is placed and the placement member 32. The rotation member 10 is divided | segmented by setting it as the structure provided with the latching member 34 which latches the both-sides edge part of the heat exchanger core 50, and the heat exchanger core 50 is mounted in the mounting member 32 from upper direction. be able to. Therefore, the heat exchanger core 50 can be quickly and easily attached to the header welding jig 1, and workability can be improved.

DESCRIPTION OF SYMBOLS 1 Header welding jig 10 Rotating members 12 and 14 Dividing member 20 Connecting member 30 Holding member 32 Mounting member 34 Locking member

Claims (3)

A header welding jig for connecting a header to a heat exchanger core having a plurality of tubes by welding,
A plurality of rotating members formed in an annular shape;
A connecting member that connects the plurality of rotating members at intervals in the axial direction;
A header welding jig comprising: a holding member that holds the heat exchanger core along the connecting member. The rotating member is configured by combining a plurality of curved divided members in an annular shape,
The said holding member is provided with the mounting member in which the said heat exchanger core is mounted, and the latching member which latches the both-sides edge part of the said heat exchanger core mounted in the said mounting member. The header welding jig according to 1. A method for producing an air-cooled heat exchanger using the header welding jig according to claim 1,
With the header temporarily attached to the end of the heat exchanger core having a plurality of tubes, the step of holding the heat exchanger core on the holding member;
And a step of performing the main welding of the header while rotating the rotating member.

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