FR2493497A1 - SPRAYER OR HEAT EXCHANGER - Google Patents

Abstract

A. DEVICE CONSISTING OF 6 VERTICAL PIPES PROVIDED WITH FINS AND CARRIED OUT BY ONE OF THE EXCHANGE FLUIDS. B. APPARATUS CHARACTERIZED BY VERTICAL PIPES ARRANGED IN A STAR AROUND A CENTRAL SUPPORT PIPE 1, CONNECTED IN SERIES BY MEANS OF CONNECTING PIPES 4 UPPER AND LOWER RECURVED RAILS, SOME OF WHICH HAVE A VERTICAL BRANCH ON A LONG JOUANT VERTICAL EXCHANGE PIPES, ON WHICH ARE FIXED TO THE TOP OF THE MOUNTING OF THE PREFABRICATED FINS SEPARATELY. C. APPARATUS INTENDED FOR THE VAPORIZATION OF A FLUID AND OR FOR A HEAT EXCHANGE BETWEEN TWO FLUIDS.

Description

The invention relates to a vaporizer or heat exchanger whose

effective elements for the

  heat transmission consist of sections of pipes

  ribbons or fins, which are arranged in an arrangement

  geometrically regular-around a central support, and which are joined together by means of tubular connectors

smooth, without ribs.

  In known vaporizers or heat exchangers, for example from US Pat. No. 3,672,446, the pipes are provided with axially extending and star-shaped vanes. These fins serve as a support, while smooth, non-ribbed tubular fittings have no support function. The necessary support or support of the fins is a hindrance to the free movement of the

  fluid flowing outwardly around the ribbed pipes.

  This is particularly the case for axially extending wings arranged in the form of a star around the pipe, because the

  external fluid flows here also in the axial direction.

  There are also known heat exchangers equipped with finned tubes supported by themselves. For example, US Pat. No. 2,640,686 shows such a heat exchanger in which the tubes provided with vanes extend, in parallel arrangement, between two collecting pipes.

annular form.

  The object of the present invention is to provide a vaporizer or heat exchanger in which the heat transfer elements are passed in series from the inlet to the outlet by the flowing fluid and arranged absolutely free in-the fluid

  outside flowing around them. In addition, the vapor apparatus

  The heat sink or heat exchanger must be transportable, in the disassembled state with a reduced space requirement to be assembled on

the place of employment.

  For this purpose, the subject of the invention is a vaporizer

  heat exchanger or heat exchanger, characterized in that each connecting pipe comprises a U-shaped or V-shaped curved section, the ends of which are bent perpendicular to the plane in which the U-shaped or V-shaped curvature is located, the curved portions in-U or V connecting pipes being immobilized in-the-holding devices mounted on the

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  central support, so that the curved ends

  perpendicularly blocked connecting pipes in the

  the upper holding means are directed downwards, and that the ends curved perpendicularly of the connecting pipes blocked in the lower holding device, offset by a spacing of pipes, are directed upwards, so that the pipe sections equipped with fins, are connected together in series, from the entrance to the exit

  of the device and form between them a self-supporting pipe cage.

  Advantageously, according to the invention, it is provided that one of the two holding devices is in a fixed position, while the other is slidably mounted on the central support, so that the pipes can freely expand.

and contract.

  In the case where the fins-are constituted as separate elements clamped on the pipes, a number of U-shaped or V-shaped pipe sections may be provided with long enough ends to

  they themselves form the rectilinear hoses to be fitted with fins.

  This saves half of the welds, screwing or other

  sealed tubular connections required.

  The following description refers to a

  embodiment of the invention in the form of a

  steam generating apparatus, described with reference to

  the attached drawings in which:

  - Figure 1 is a representation in

  the lower half of an upper holding device with a part of the apparatus; FIG. 2 is a side elevational view

  partly in section of the same part of the vapor apparatus

  sator, with the retainer uncovered; Figure 3 is a side elevational view of the smaller scale vaporizer;

  FIG. 4 is a view from the top of the

  riser of Figure 3; - Figures 5 to 7 show various pipe sections; - Figure 8 shows a holding device sliding axially on a central support; FIG. 9 is a view of a vaporizer

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  with a different arrangement of finned pipes;

  FIG. 10 is a diagrammatic representation

  tick of the vaporizer broken down into elements for transport.

  In all these figures the identical parts are provided with the same reference numerals. The vaporizer comprises a central support 1 in the form of a pipe provided with a foot II (Figure 3). On this central support are mounted an upper holding device 2 and a lower holding device 3. The upper device 2 is rigidly fixed to the carrier pipe 1, while the lower holding device 3 is slidably mounted on the

pipe 1.

  The holding device 2 consists of two circular plates in the form of hollow plates 21 and 22.

  protruding edge of these plates are milled ten grooves 23 extend

  radially and with a cross-section of half

  circle, the diameter of which corresponds to the diameter of the pipes.

  The lower plate 22 is welded at 24 to the central support 1 which is itself closed at its upper end by a wafer 12. A bearing eyelet 14 integral with a cap-shaped part 13, presses the two plates 21 and 22 and thus maintain in the desired position the pipe portions bent U or V connecting pipes 4

(Figure 2).

  The lower holding device 3 according to FIG. 8 is constituted in the same way. The two cup-shaped plates are here connected together by means of bolts 31 parallel to the pipe 1, so that the whole device can slide on the pipe 1. Between the two half-ends 21 and 22 of the holding device 2 are held by clamping five tubular connecting portions 4 whose end 41 is

directed downwards (Figure 3).

  In the upper holding device 2 are

  five connecting pipes 4 and, in the

  your lower one are provided four of these junction 4 pipes

  with their ends 41 directed upwards. Between the

  respective mounts 41 directed upwardly and downward, are mounted straight pipe sections 42 provided with fins 6 for heat exchange, and which are connected to a seal, for example by a welding bead 51 with the ends of

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  pipe 41 respective. Since the junction pipes 4, at the top and at the bottom, are offset each time by a pipe spacing, a series connection is obtained for the tubes provided with fins 42. An inlet connection 81 and a connection of outlet 82 are provided at the bottom on the heat exchanger (FIG. 3). In the case where the separated fins 6 are intended to be put in place later on the pipe sections already mounted, the number of connecting pipes 51 can be reduced. The ends 41 'can be made long enough to replace themselves the pipe sections 41 to be filled with fins, so that half of the

  joints 51 is removed (Figure 1).

  In the case of the vaporizer according to FIGS. 3 and 4, comprising ten finned tubes 6, it is then provided, for example, five U-shaped or V-shaped tubular connectors 4, with long ends 41 ', directed parallel to the support, and four tubular connectors 4 with short ends (see Figure 5). Instead, one could also use nine tubular connectors 4 each presenting

  a long end 41 "and a short end 41 (Figure 6).

  An additional pipe, straight, with fins, leads

  then to the inlet or outlet fittings 81, 82.

  Figures 3 and 4 show a vaporizer of the type of construction described above with a central support pipe 1 and a fan blowing hot air 7 attached to the foot 11 of the pipe 1. The ten pipes 6 with longitudinal fins which are used for heat exchange are provided in a provision

  concentric circular around the support pipe 1. The vapor

  The riser serves, for example, to bring back to the gaseous state liquid nitrogen or oxygen. The fan blowing hot air 7 blows the pre-heated air into the interior of the

  central support pipe 1 which is provided with holes 15

  pouring its wall, through which the hot air circulates the

  along the entire length of the heat exchange fins 6.

  The connecting pipes 4 and the main pipes 42 (FIG. 7) consist for example of stainless steel, copper, or aluminum, and the axially extending cooling fins 6 are preferably made of aluminum and may be set after the fact on already assembled pipes. In the case where one uses

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  pipes 42 according to Figure 7 with fins 61 fixed rigidly on them, and extending perpendicular to the longitudinal axis of the pipe, it is obviously necessary to connect the straight pipe sections 42, up and down, to means of junction pipes 4 with short ends. FIG. 9 shows a heat exchanger of the type similar to that of FIGS. 3 and 4, but in which the holding devices 2 'have a non-shaped profile.

not round, but square.

  FIG. 10 shows, in a simplified diagram, "the prepared components for shipping, intended for mounting a vaporizer comprising ten heat exchange pipes according to FIGS. 3 and 4. The shipment comprises a pipe of central support (1), 10 straight pipes (according to FIG. 5) 20 half-shells with fins (6), 2 complete holding devices (2 and 3), 1 foot (11), 1 blower (7),

  2 end connections (81, 8Z.

  If the connecting hoses are equipped with tight threads, the entire spray can be assembled without the need for welding cords. As shown in the figure, these are relatively small components that are well suited for shipping to

assembly and employment.

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Claims (7)

  1) Vaporizer or heat exchanger whose elements for heat transmission consist of sections of pipes notammentrectilignes, provided with ribs or fins (6), which are arranged in a regular geometric arrangement around a central support (1), and which are joined together by means of smooth connecting pipes (4), not filled   of fins, characterized in that each connecting pipe   sound (4) comprises a U-shaped or V-shaped curved section whose ends (41) are curved perpendicularly to the plane in which the U-shaped or V-shaped curvature is located.   curved U or V connecting pipes (4) being immo   stabilized in holding devices (2, 3) mounted on the central support (1) so that the ends (41) curved perpendicularly of the connection pipes (4) locked in the upper holding device (2) are directed   downwards, and that the ends (41) curved perpendicularly   the connecting pipes (4) locked in the lower holding device (3), offset by a pipe spacing, are directed upwards so that the pipe sections (42, 42 ', 42 ") having fins, are connected together in series, from the inlet (81) to the outlet (82) of   the device and form between them a self-supporting pipe cage.   2) Vaporizer or heat exchanger according to claim 1, characterized in that the holding devices (2, 3) each comprise two plates or clamping cups (21, 22) whose raised edges are provided with grooves (23) of reception of connecting pipes (4), one of the devices   (2) being rigidly fixed, and the other (3) being mounted to   smooth axially on the central support (1).   3) Vaporizer or heat exchanger according to claim 1, characterized in that a number of connecting pipes (4) corresponds to half the number of pipes provided with fins, have their ends (41 ') curved vertically and have a length corresponding to that of the pipes provided with fins, the fins being fixed later   on these curved ends (41 ').   4) Vaporizer or heat exchanger according to claim 1, characterized in that all the connecting pipes (4) comprise a short end (41) bent 7 2493497   perpendicularly and a longer end curved perpendicularly (41 ") whose length corresponds to that of the pipes provided with fins (42), the fins being fixed   later on these long ends.   5) Vaporizer or heat exchanger according to claim 1, characterized in that all the connecting pipes (4) comprise two short ends   (41) and the pipes (42) provided with fins (61) are straight.   6) Vaporizer or heat exchanger according to claim 1, characterized in that the central support (1) is constituted by a pipe in the wall of which are provided bores (15) through which a stream of cooling fluid or heating can be directed to pipes (42) provided with fins.   7) Vaporizer according to claim 6, characterized in that on the central support pipe (1) is mounted a blower (7) which blows hot air   in the interior of the support pipe (1).