FR2702271A1 - Improved distributor heat exchanger comprising anticorrosion lining - Google Patents

Abstract

In this distributor fitted with an anticorrosion lining for a heat exchanger, the tube plate (5) is provided with a projection (11) fixed to this tube plate and formed by a deposit of welding material acting in the manner of an edge for a butt weld of the said tube plate to the cylinder (1) of the distributor, the anticorrosion linings (3) and (6) being joined to the tube plate and the cylinder using a ring of anticorrosion material substantially having the profile of an L with a rounded corner which adheres to the said joint.

Description

i Advanced distributor for heat exchanger, comprising

anticorrosion lining.

  The present invention relates to a new distributor for a heat exchanger provided with an expensive anticorrosion lining (for example made of titanium). In the present invention, starting from a

  perfectly flat tube plate, the continuity of the lining is obtained

  anticorrosion wise inside the joint between said tube plate and

  the distributor cylinder with a concentration of stresses mid-

  minimum and with the minimum of anti-corrosion material required, together with a considerable increase in the reliability of the seal

  between said tube plate and said cylinder and a considerable decrease

maple of the costs involved.

  We already know in the prior art various types of

  distributors for heat exchangers fitted with an an-

  expensive ticorrosion, for example made of titanium.

  In one of these known types, a cylindrical tubular plate is used having a U-shaped section and in which the flat bottom and the cylindrical wall are connected by a fillet to prevent a concentration of the stresses and, consequently, points However, such a tube plate has the disadvantage that during an explosion plating, which is an essential operation for applying titanium, its side wall reflects the explosion wave with the result of numerous defects which have for consequence that a large peripheral part of said tube plate cannot be used. As a result, it is necessary to use

  larger diameter tubular plates and therefore

  larger and more expensive tributaries.

  This drawback is eliminated in another type of distribution.

  tor for heat exchanger provided with an anticorrosion lining, in which a completely flat tube plate provided

  a circular groove to obtain an appendix intended for welding

  ge to the distributor cylinder and to receive an additional element

made of anticorrosion material.

  The latter solution has the disadvantage of

  to tensify and to concentrate the stresses of the connection between the plate

  tubular and the cylinder due to this circular groove and the re-

  consecutive duction of the cross section of said tubular plate,

  this translating into lower reliability and the need for dimensions

  distributor, of a larger amount of anticorrosive material

  expensive erosion to fill said circular groove with for-

an increase in costs.

  The object of the present invention is to remedy the drawbacks

  aforementioned by providing a distributor for a heat exchanger

  fitted with an expensive anticorrosion lining, for example made of titanium, in which the continuity of the anticorrosion lining between the flat tubular plate and the distributor cylinder is obtained suddenly

  safe with a minimum concentration of stresses and with a mini-

  mum of anti-corrosion material required.

  This objective is mainly achieved by the fact that the plac-

  that tubular no longer has a circular groove, the projection requires

  to make the welded joint between said tubular plate and the cy-

  dispenser liner now being formed on the periphery

  that of the tube plate by a deposit of solder material; in or-

  tre, we obtain the continuity of the anticorrosion lining at the

  joined using an anti-corrosion ring, the cross section of which

  a rounded L-shaped profile which adheres perfectly to the joint

  and to the interior surfaces adjacent to said joint.

  Therefore, the dispenser having an an-

  ticorrosion for a heat exchanger, comprising a tu- plate

  bular and a distributor cylinder both filled with an anticorrosion material applied by explosion plating, said material being eliminated from the peripheral regions in which the tube plate is connected to said cylinder, is characterized according to the present invention in that in the region peripheral of said tubular plate where there is no anticorrosion lining, a projection has been formed, connected by a leave to said tubular plate and formed by a deposit of solder material, to produce the aforementioned welded joint between said tubular plate and said cylinder, a ring made of anticorrosion material

  having a substantially L-shaped profile with a rounded angle that adheres perfectly

  ment to said seal and to the interior surfaces of the dispenser which are

  adjacent to said joint and connecting, like a fillet, the anti-

  corrosion of the tube plate to the anticorrosion lining of said cy-

lindre.

  To facilitate the introduction of such an anti-material ring

  corrosion having a substantially L-shaped profile with rounded angle in the cy-

  distributor liner, said ring has, according to another characteristic of the present invention, a diameter smaller than that of said cylinder,

  a ring forming a shoulder made of anticorrosion material being interpolated

  placed between said ring having a substantially L-shaped profile with a rounded angle

  di and the anticorrosion lining of said distributor cylinder In

  a variant of the present invention, the ring made of anticorrosive material

  Rounded L-shaped profile consists of a plurality of sectors

  welded to each other after insertion into said distribution cylinder

  striker, said welds being protected by metal joint covers

  anticorrosion material welded to the underlying parts Finally according to a

  preferred embodiment of the present invention, said material an-

ticorrosion is made of titanium.

  The invention will appear more clearly on reading the description

  description of preferred embodiments, given below purely

  illustrative and nonlimiting and for which reference will be made to the

attached sins on which:

  Figure I is a schematic longitudinal section of a dis-

  heat exchanger tributor formed according to the teachings of the present invention; Figure 2 is a greatly enlarged longitudinal section of a detail in Figure 1; and Figure 3 is a perspective view on a greatly enlarged scale showing an alternative embodiment of the L-profile ring

  with rounded angle according to the present invention.

  Referring to the drawings, it can be seen that the distributor

  heat exchanger consists of a cylinder 1 closed by an end

  dome-shaped mite 2, this cylinder and this end both being covered by respective anticorrosion linings 3 and 4 made of titanium, applied by explosion plating, and a flat tubular plate 5 also provided with anticorrosion lining 6 applied by plating by explosion, and supporting a plurality of tubes 7 This

  tube plate 5 and this cylinder 1 are welded end to end one at a

  be by the welded joint 8 at their peripheral regions res-

  pectives 9 and 10 o said respective linings 6 and 3 have been eliminated

  Born for this purpose, on said peripheral region 9 of the tube plate has been formed, by deposition of a welding material, a projection 11 connected to said tube plate (see specifically FIG. 2), this

  projection therefore acting as an edge with respect to said seal 8.

  A corresponding projection 12 is also formed on said peripheral region 10 of the cylinder 1 by depositing a welding material. The connection between the lining 3 of titanium of the cylinder 1 and the lining 6 of titanium of the tube plate 5 is then formed by a ring 13 in

  titanium which, in section, has the shape of an L with rounded angle and which is dou-

  blocked at its ends with the underlying elements.

  However, since to facilitate the introduction of the ring 13 into the cylinder 1, this ring has a diameter smaller than that of the cylinder, there is interposed a ring 14 forming a shoulder, also made of titanium, between the ring 13 with an L-profile and the lining 3 in titanium of the cylinder 1, in such a way that the plate 13 with an L-profile is welded respectively to the lining 6 in titanium of the tubular plate 5 and in the ring 14 in titanium As it is well known in the field Titanium technique, it is also necessary to insert between the deposit of welding material and the titanium lining an inert material 15, 16, such as for example silver, aluminum, etc. According to a variant shown in FIG. 3, said titanium ring 13 with a substantially L-shaped profile with rounded angle is formed

  of three sectors 17, 18 and 19 which are welded to each other during

  that they are placed inside the cylinder, the respective welds 20

  being protected by corresponding joint covers 21.

  It is understood that the foregoing description has not been given

  born only for illustration and not limitation and that variations and modifications can be made within the framework of the pre-

invention.

Claims (4)

  1 Distributor fitted with an anti-corrosion coating for   heat exchanger, comprising a tube plate (5) and a cylinder   dre (1) dispenser both filled with suitable anti-corrosion material   folded by explosion plating, said material being removed from the   peripheral regions in which said tube plate is assembled to said cylinder, characterized in that in the peripheral region (9) of said tube plate (5), where there is no anticorrosion lining, a projection (11) is formed, connected by a leave to said tubular plate and formed by a deposit of welding material, in order to produce said welded joint between the tubular plate and the cylinder, and a ring (13) of anticorrosion material having substantially in section an L-profile with rounded angle perfectly adhering to said joint and   inner surfaces of the dispenser which are adjacent to said seal and re-   linking the anticorrosion lining of the tube plate to the lining anticorrosion of the cylinder.   2 distributor provided with an anticorrosion lining for a heat exchanger according to claim 1, characterized in that   said ring (13) has a diameter smaller than that of the cylinder, a ba-   gue forming shoulder (14) of anticorrosion material being interpolated   placed between said ring (13) an L-shaped profile with a rounded angle and the lining   anti-corrosion sage (3) of the distributor cylinder.   3 distributor provided with an anticorrosion lining for a heat exchanger according to claim 1, characterized in that said ring made of anticorrosion material and L-profile with rounded angle   consists of a plurality of sectors (17, 18, 19) connected to each other   very by welds (20) after their insertion in the cylinder of the device   tributary, said welds (20) being protected by joint covers   (21) of anticorrosion material welded to the underlying parts.   4 distributor provided with an anticorrosion lining for a heat exchanger according to claim 1, characterized in that   said anticorrosion material is titanium.