FR2583143A1 - BURNER DEVICE FOR LIQUID FUEL AND BOILER PROVIDED WITH SUCH A DEVICE - Google Patents

Abstract

1. A sprayer device for liquid fuel comprising a hollow head (1, 1a) intended to be fixed by one end on a boiler wall (2) or the like in the region of an orifice in this wall and comprising, in the interior, at least one jet which opens towards the boiler and which also comprises an assembly (6, 6a) for the supply of air for combustion and of liquid fuel, the head (1, 1a) comprising, in its peripheral wall, a longitudinal opening (13, 13a) on whose sides there is removably fixed a plate (14, 14a), the jet or jets (4, 5 : 4a, 5a) being mounted on said plate by fixing means (F) allowing adjustment of the jet or jets substantially in the direction of the axis (A) of the head, characterized in that the fixing means (F) for fixing the jet or jets on the plate (14, 14a) comprise an opposing plate (29, 29a) on which the jets (4, 5 ; 4a, 5a) are fixed, said opposing plate (29, 29a) itself being fixed adjustably in a direction parallel to the axis (A) of the head, relative to the plate (14, 14a), and in that the jet or jets (4, 5) are positioned radially by a centering star (39, 39a) and that a deflector (46, 46a) is fixed on the centering star (39, 39a), this deflector defining an annular space (50) for the passage of the air, the adjustment of the longitudinal position of the jets (4, 5) along the axis (A) causing a modification in the passage section of the annular space (50) and an adjustment in the flow of air for combustion.

Description

BURNER DEVICE FOR LIQUID FUEL AND BOILER

EQUIPPED WITH SUCH A DEVICE.

  The invention relates to a burner device for liquid fuel, of the type which includes a hollow head intended to be fixed at one end, to a boiler wall or the like, at an orifice of this wall, and comprising, inside, at least one nozzle which opens out towards the boiler and which, moreover, comprises an assembly for supplying combustion air and liquid fuel, articulated on the end of the head remote from the boiler, so that by rotating this set, we can release

the back of the head.

  It is known that such burner devices require, relatively frequently, maintenance and cleaning operations leading to disassembly of the nozzles. It is desirable to make the disassembly and

  assembly of these sprinklers faster than until now.

  We also know that adjusting the position

  tion of the nozzles to obtain satisfactory combustion, for a given power, is relatively delicate. It is desirable to make this adjustment simpler. It is also desirable to be able to easily find the

  initial adjustment after maintenance disassembly of the nozzles.

  The object of the invention is, above all, to provide a burner device which responds better than hitherto to the various requirements of practice and which, in particular, no longer has or to a lesser degree, the disadvantages

recalled above.

  The object of the invention is therefore to provide a device

  tif of burner allowing a simple disassembly of the sprinkler (s) and an easy and quick adjustment of these sprinklers. This burner device must also make it possible to find

  easily the initial adjustment after disassembly of the nozzles.

  According to the invention, a burner device, for liquid fuel, of the kind defined above, is characterized in that the head has, in its peripheral wall, a longitudinal opening on the edges of which a plate is detachably fixed, and the sprinkler (s) are mounted on said plate, using fixing means allowing adjustment of the sprinkler (s)

  substantially in the direction of the axis of the head.

  Preferably the means for fixing the sprinkler (s) on the plate comprise a counterplate on which the sprinklers are fixed, said counterplate being itself fixed, in an adjustable manner in a direction

  parallel to the axis of the head, relative to the plate.

  Means for marking the relative position of the plate and the counterplate are advantageously provided, these marking means being in particular formed by a graduated scale fixed on the plate (or the counterplate), and an index, or equivalent, provided on the backplate (or on the plate). Preferably, the counterplate comprises at least one oblong opening in which a locking means can slide, in particular constituted by a screw, integral with the plate. The oblong lumen, closed at its ends, is oriented parallel to the axis of the head. Generally, two parallel oblong lights are provided in the

plywood.

  Advantageously, the opening provided in the peripheral wall of the head opens, in a direction parallel to the axis of the head, on the side opposite the end.

  of the head intended to be fixed on the boiler.

  Each nozzle is rigidly connected to the fixing means, in particular to the counterplate, by a rigid pipe generally bent at a right angle. Each nozzle is positioned, radially, by a centering star which can slide, in the direction of the axis of the head, in the latter. A mouthpiece can be fixed in the head so as to surround the nozzles and project towards

  inside the boiler, flaring.

  Generally, the plate has, in its central region, a longitudinal slot, which can open at the end of the plate facing the wall of the boiler, this slot being intended to be crossed by the fittings of the sprinkler pipes, so that sliding is possible between the counterplate and

the plaque.

  The opening in the peripheral wall of the head can have a rectangular shape. The plate then also has a rectangular shape and ends, on the side remote from the part intended to be fixed to the boiler, at right angles to the outside, the plate being placed and fixed, in particular by screws, on the contour of

the opening.

  According to another possibility, the opening may have the shape of a trapezoid and be provided, on its two non-parallel edges, with grooves. The plate has the same trapezoid shape, in particular isosceles, and the two non-parallel sides of this plate are suitable for being engaged in the grooves provided on the edges of the opening. The transverse edge of the plate, distant from the neighboring end of the boiler, is pushed into the closed position by the assembly articulated on the head. This transverse edge can be formed by an angled return towards the inside of the head. The invention also relates to a boiler equipped with a burner device as defined above.

  The invention consists, apart from the arrangements

  tions outlined above, in a number of others

  provisions which will be more explicitly discussed below

  after about particular embodiments described in detail with reference to the accompanying drawings, but which do

are in no way limiting.

  Figure 1 of these drawings is a partial vertical section, at the head, of a device

  burner according to the invention.

  Figure 2 is a top view, with respect to

Figure 1.

  FIG. 3 is a view along III-III, FIG. 1,

with parts torn off.

  Figure 4 is an exploded perspective view of

  the head, the plate and the counter plate.

  Figure 5 is a partial section along V-V Figure 6, of an alternative embodiment of the device

head burner.

  Figure 6, finally, is a view along VI-VI

figure 5.

  Referring to Figures 1 to 4 of the drawings, one can see a burner device for liquid fuel comprising a hollow head 1 intended to be fixed, at one end, to a wall 2 of the boiler, or the like, at a level orifice 3 of this wall. The head 1 comprises, inside, according to the embodiment of FIGS. 1 to 4, two nozzles 4, 5 corresponding to different heating stages and which can be supplied separately. These nozzles 4 and 5 open out towards the boiler. The axis A of the head 1 is generally orthogonal to the wall 2. The axes of the nozzles 4 and 5 are parallel to the axis A. The burner device further comprises an assembly 6 for air supply and in liquid fuel,

  constituting the burner body. This set 6 is arti-

  butted on the end 7 of the head 1 remote from the wall 2 of the boiler so that, by rotation of

  the assembly 6, it is possible to release the rear of the head 1.

  More precisely, this head 1, as better visi-

  ble in Figure 4, has, overall, a cylindrical shape.

  The end of this head 1, intended to be applied con-

  be the wall 2, is integral with a flange 8 bearing against

  the wall 2 having substantially a square or other shape.

  This flange 8 has a flange 9 forming a peripheral belt substantially orthogonal to the wall 2 and bearing against this wall. A seal is clamped between this edge 9 and the wall 2. Oblong slots 11 (Figure 4), oriented in the direction of the diagonals of the flange 8, are provided in the latter to allow its attachment to the wall 2 to the using screws or the like.

  As clearly visible in FIG. 4, the head 1 comprises

  door, in its peripheral wall 12, (cylindrical according to the embodiment of FIGS. 1 to 4,) a longitudinal opening 13 on which a plate 14 is fixed so

removable.

  The wall 12 has an extra thickness 15, forming a bulge around the opening 13. The face 16, located upwards according to the representation of FIGS. 1 and 4, of the extra thickness 15 is plane, parallel to the axis of the head 1 , and has the general shape of a U, i.e. a rectangle

  a small side of which has been removed, opposite the flange 8.

  The opening 13, of rectangular shape, opens, in the longitudinal direction, at the end 7 of the head 1. The face 16, of the extra thickness 15, constitutes the edge turned radially towards the outside of the opening 13. The plate 14 is placed and fixed on this face 16. The outline of the plate 14 is

  rectangular and conforms to the exterior contour of the face 16.

  The fixing of the plate 14 is ensured, advantageously, using screws 17 passing through holes 18 (FIG. 4) provided in the plate 14. The screws 17 cooperate with holes

  threaded 19 (Figure 4), provided on both sides longitudi-

opening 13.

  A transverse rib 20 is provided along the short side of the face 16, in the vicinity of the flange 8, to

serve as a stop for the plate 14.

  The end 7 of the head 1, remote from the wall 2, is formed by a sort of flange of substantially square shape, provided, on its two parallel sides orthogonal to the plane of the face 16, with notches such as 21 included

  between transverse projections 22 provided with bores 23.

  The axes of the bores 23 of the projections 22 located on the same side of the end 7 are aligned. These bores 23 are

  intended to receive pins 24, 25, used for fixing

  tion and at the joint of the burner body 6 on the head 1. The pins 24, 25 are located on either side of

  the axis of the head 1 and the assembly 6 or burner body

  carries extensions (not visible in the drawings) suitable for being engaged between two projections 22 situated on the same side of the end 7 (FIG. 4), each extension having a bore intended to be crossed by the associated pin 24 or 25 The transverse edge 26, of the end 7, located on the side of the opening 13, has in its region

  middle, a notch 27 for the passage of the plate 14.

  The internal volume 28, of the head 1, constitutes a chamber of generally cylindrical shape, open at its two longitudinal ends. The two nozzles 4, 5 are mounted on the plate 14 using fixing means F allowing adjustment of the nozzles substantially in the direction of the axis A of

head 1.

  These fixing means F comprise a counter

  plate 29 fixed in an adjustable manner in a direction

  parallel to axis A with respect to plate 14. The counter

  plate 29 has a rectangular shape, clearly visible in Figure 4; it comprises, along its two long sides, substantially at mid-length, two oblong openings 30 parallel suitable for cooperating, each with a screw 31 engaged in a tapped hole 32 provided on each side of the

plate 14.

  The counterplate 29 has, in its central region

  trale, two holes 33, 34, the centers of which are aligned on the longitudinal axis of the plywood 29. These holes 33, 34 are intended for the passage of fittings 35, 36, of the bulkhead type; supply pipes outside the head 1, such as 37, are detachably connected to the fittings 35, 36, which are fixed

on plate 29.

  Each nozzle 4 and 5 is rigidly connected to a fitting 35, 36 and therefore to the counter plate 29, by a rigid pipe 38 bent substantially at 90 '.

  The nozzles 4, 5 which have a cylindrical body

  drique provided at its end facing the boiler with a spray nozzle, are positioned radially by a centering star 39 (see in particular Figure 3) which, in the example considered, has three branches 40 angularly offset by 120 *. This star 39 has a core 41 provided with two bores arranged symmetrically with respect to the axis A, in which the bodies of the nozzles 4 and 5 are engaged. Pressure screws, such as 42, are

  provided for blocking the nozzles in the body 41.

  A nozzle 43 is fixed in the head 1, for example using screws v, at the end of this head situated against the wall 2. This nozzle 43 is suitable for projecting inside the boiler , flaring in a frustoconical area 44, the small section of which is connected to a cylindrical area 45 of smaller diameter of the end piece. The branches 40 of the star 39 bear against the surface

  inside of zone 45 over which they can flow

  emit longitudinally. A deflector 46 formed by a kind of disc comprising a central hole 47 and radial slots 48 is fixed on bosses 49, integral with the star 39, slightly projecting in the direction of the

  boiler. The deflector 46 is located, axially, sensitive-

  lying at the level of the small base of the frustoconical zone 44

  so as to determine an annular space 50 for the passage

air wise.

  It is immediately understood that the adjustment of the longitudinal position of the nozzles 4, 5, along the axis A, and therefore of the star 39, results in a modification of the cross section of the annular space 50. This therefore results in an adjustment of the combustion air flow, coming from a blower (not shown), which passes through the head 1

towards the boiler.

  The adjustment of the position of the nozzles in the direction of the axis A is obtained directly by adjusting the position of the counter-plate 29 relative to the plate 14. The latter; to allow the sliding of said counter-plate 29 on which the rigid pipes 38 are fixed, comprises, in its middle part, a longitudinal slot 51 which can open at the end of the plate 14 facing the wall 2. The other end of the plate 14 may have a wing 52, at right angles, towards the outside, forming a square and suitable for bearing

  against the adjacent end of the burner body 6. A garnish

  seal 53 (figure 1) is provided between the head 1

and the burner body 6.

  Marker means R are provided between the plate 14 and the counter plate 29. These mark means comprise a graduated scale 54 provided on the plate 14 and an index provided on the counter plate 29. In the example considered, l index 55 consists of a hook, clearly visible on

  Figure 2, the outline of the counter plate 29. Two electro

  trodes, 56, 57 are provided to ensure, by the formation of an electric arc, the ignition of the liquid fuel in a conventional manner. These electrodes, formed by rods parallel to the axis A and bent at right angles to their ends, are located in a plane passing through said axis A

  and orthogonal to the plane of the axes of the nozzles 4 and 5.

  The high voltage supply, from a transformer

  lifting electrode T (FIG. 2) of the electrodes 56, 57 is provided by cables 58 electrically connected by connectors

  59 to said electrodes and to the transformer.

  A safety link is provided between the head 1 and the burner assembly or body 6 to prevent the opening of the rear of the head 1, by rotation of the body 6, without the use of a tool. This security attachment is obtained using a screw 60 which passes through a hole provided in a flange 61 of the body 6 and which is engaged in a tapped hole 62 (FIG. 4) provided in the middle of the wing 52 of the

plate 14.

  However, the adjustment and maintenance operations of the burner device of FIGS. 1 to 4 are

the following.

  When putting such a device into service, an initial adjustment of the position of the nozzles 4, 5 is carried out as a function of the power of the boiler. It is necessary to adjust the position in the direction of the axis A, of the deflector 46, as explained above, so that

  the combustion air flow is adapted to the combustion flow

  tible. If the air flow is insufficient, there is production of coke; if the combustion air is in excess, the efficiency

of the boiler decreases.

  The adjustment is obtained by loosening the screws 31 (see in particular Figure 2) and by sliding, parallel to the axis A, the counter-plate 29, and therefore the

  nozzles 4, 5 and the deflector 46, fixed on this counter

  plate. When the appropriate position of the counter plate 29 is obtained, the screws 31 are tightened, which ensures the blocking

  of the counter plate 29 on the plate 14.

  When it comes to carrying out a

  maintenance operation, for example a cleaning operation

  age of the nozzles 4, 5 and the deflector 46, the operation is

next way.

  First of all, the pipes 37 of the fittings 35, 36 are dismantled. The screw 60 is then dismantled, using

  of a tool, for example a wrench.

  One then removes one of the pins 24, 25, generally the one whose access is the easiest. The other pin 25 or 24, which remains in place, serves as the pivot axis of the assembly or body 6 relative to the head 1. It should be noted that the pins 24, 25 are located behind, with respect to the boiler, of the entire head 1, and

  in particular behind the connections 35, 36.

  By rotating the body 6 around the spindle or 24 which has remained in place, the rear end 7 is released.

head 1.

  The electrode cables 58 are then disconnected by separating the connectors 59 either from the electrodes 56, 57 or from the transformer T, depending on the ease of access to these elements. The screws 17 are then dismantled, which maintain the plate 14 on the head 1. The screws 31, which ensure the locking of the counter-plate 29 on the plate 14, remain tight so that the counter-plate 29 born

  can move relative to plate 14.

  The assembly of the plate 14, of the counter plate 29, of the nozzles 4, 5, of the star 39 and of the deflector 46 is then made to slide, in the direction of the axis A so as to release this sub- assembly of the head 1 on the side opposite to the wall 2 of the boiler. It is then possible to carry out the operations of cleaning or replacing the nozzles of the nozzles 4 and 5 and of the deflector 46, without however modifying the position of the nozzles 4, 5 with respect to the counterplate 29. Then reassembly and fixation,

  using screws 17, plate 14 on head 1.

  The cables 58 are reconnected; the body 6 is closed on the head 1 and then the pipes 37 are connected to the

fittings 35, 36.

  At the end of this reassembly operation, the plate 14 has returned to the position it had before disassembly. The nozzles 4, 5 and the deflector 46 are returned to their position before dismantling, since the counter plate 29 has not been moved relative to the

plate 14.

  As a result, the initial burner setting was not changed by this maintenance operation, which

  finds it considerably simplified.

  Figures 5 and 6 show a variant of

  realization of the device of the invention.

  The identical parts or elements or playing roles similar to elements already described in connection with FIGS. 1 to 4, will be designated by the same reference numerals, possibly followed by the letter A, and do not

  will not be described again or will be described briefly.

  According to this variant, the longitudinal opening 13 &, formed in the wall of the head 1, has the shape of a trapezoid, preferably isosceles, whose parallel bases are orthogonal to the plane of Figure 5. The two non-parallel edges of this opening 13a converges in the direction of the wall 2. On each of these converging edges, a groove

longitudinal 63 is provided.

  The plate 14a has an isosceles trapezoid shape corresponding to that of the opening 13a; the thickness of this plate 14 & is such that the edges of said plate can be engaged in the grooves 63. To facilitate the positioning of the plate 14a, the height h of the grooves 63 can be much greater than the thickness of the plate 14a on the side of the end 7a remote from the wall 2; this height h gradually decreases towards the wall 2

  up to a value equal to the thickness of the plate 14a.

  The blocking of the plate 14a on the head 1a is ensured by the cooperation of these non-parallel edges and of the above grooves 63. The rear transverse edge 52a of the plate is pushed by the assembly 6a, articulated on the head 1a, this edge transverse 52a preferably being at right angles to the inside of head 1a. We find the seal 53â between this assembly 6a and the head la. A

  slight transverval play may remain between the transverse edge

  sal 64 (Figure 5) of the plate 14a and the flange 8a.

  The counter-plate 29a, of rectangular shape, is fixed to the plate 14a under the same conditions as those

previously explained.

  The graduated scale 54a is provided on the counter

  plate 29â while the reference 55a is provided on the plate 14e.

  The variant embodiment of FIGS. 5 and 6 includes

  also carries two nozzles 4a, 5a arranged with their axes symmetrically symmetrically 0 with respect to the axis A of the head 1. The plane of the axes of the nozzles is orthogonal to the plane of FIG. 5. As visible in FIG. 6, the two holes provided in the counterplate 29, for the passage and fixing of the rigid supply pipes for the sprinklers, have their centers aligned on a straight line 65 which is orthogonal to the axis A of the head.1 whereas, according to the previous embodiment, this straight line was parallel to said axis A. It should also be noted that the plane of the opening i3 & and of the counterplate 14a is parallel or substantially parallel to the axes of the articulation pins 24a 25a, depending on the embodiment of the Figures 5 and 6, while according to the embodiment of Figures 1 to 4, this plane was

  orthogonal to the axis of the hinge pins.

  The adjustment of the burner device of FIGS. 5 and 6 is carried out under the same conditions as those explained above by displacement of the counterplate 29a relative to the plate 14a, after loosening the screws 31. The disassembly of the nozzles for cleaning and the maintenance is carried out, as explained above, by dismantling the plate 14a and the assembly which is fixed thereto, without modifying the position of the counter-plate 29k relative to said plate 14a. The setting of the nozzle position is thus not modified during an operation

maintenance.

  Disassembly is facilitated whatever the

  length of penetration of the head into the boiler.

Claims (10)

  1. Burner device for liquid fuel, comprising a hollow head (1, 1) intended to be fixed, at one end, to a wall (2) of a boiler or the like, at an orifice of this wall, and comprising , inside, at least one nozzle which opens towards the boiler and which, moreover, comprises an assembly (6, 6a) for supplying combustion air and liquid fuel, articulated on the end (7, 7â ) from the head remote from the boiler, so that by rotation of this assembly, the rear of the head can be released, characterized in that the head (1, 1a) has, in its peripheral wall, an opening longitudinal (13, 13a) on the edges of which a plate (14, 14à) is detachably fixed and the sprinkler (s) (4, 5; 4a, 5a)   are mounted on said plate, using fixing means   tion (F) allowing adjustment of the sensitive nozzle (s)   along the direction of the axis (A) of the head.   2. Device according to claim 1, characterized in that the fixing means (F) of the sprinkler (s) on the plate (14, 14a) comprise a counterplate (29, 29k) on which the sprinklers are fixed   (4, 5; 4â, 5a), said counterplate (29, 29a) being itself   even fixed, adjustable in a direction parallel to the axis (A) of the head, relative to the plate (14, 14â).   3. Device according to claim 2, characterized in that reference means (R) of the   relative position of the plate (14, 14a) and the counter   plate (29, 29a) are provided, these reference means being in particular formed by a graduated scale (54, 54a) fixed on the plate (14) or the plywood (14a), and an index (55, &), or equivalent provided on the plywood (29) or on the plate (14k).   4. Device according to claim 2 or 3, characterized in that the counter-plate (29, 29a) comprises at least one oblong lumen (30, 30%) in   which can slide a locking means, in particular   set up by a screw (31, 31a), integral with the plate (14, 14k%), said oblong lumen being oriented parallel to the axis (A) of the head, two parallel oblong lumens   being generally provided in the counterplate (29, 29a).   5. Device according to any one of the claims.   previous cations, characterized in that the opening (13, 13a) provided in the peripheral wall of the head (1, 1 &) opens, in a direction parallel to the axis (A) of the head, on the side opposite to the end (8, 8a) of the head   intended to be fixed on the boiler.   6. Device according to claim 2 or according to all of claim 2 and any one of   Claims 3 to 5, characterized in that each   nozzle (4, 5; 4a, 5a) is rigidly connected, to the fixing means (F) in particular to the counterplate (29, 29a), by a rigid pipe (38).   7. Device according to claim 2 or according to all of claim 2 and any one of   Claims 3 to 6, characterized in that the plate   (14, 14 &) has, in its central region, a slit longi-   tudinal (51, 51a) intended to be crossed by rac-   cords (35, 36; 35a) of the sprinkler pipes, so that sliding is possible between the   counter plate (29, 29a) and the plate (14, 14a).   8. Device according to any one of the claims.   previous cations, characterized in that the opening (13) formed in the peripheral wall of the head has a rectangular shape, while the plate (14) also has a rectangular shape and ends, on the side remote from the part intended to be fixed on the boiler, at an angle (52) outwards, the plate (14) being placed and fixed, in particular by screws (17), on the contour of the opening (13).   9. Device according to any one of   Claims 1 to 7, characterized in that   the opening (13â) has the shape of a trapezoid and is provided, on its two non-parallel edges, with grooves (63), and that the plate (14a) has the same shape of trapezoid, in particular isosceles, and the two non-parallel sides of this plate (14a) are suitable for being engaged in the grooves (63) provided on the edges of the opening.   10. Boiler for liquid fuel equipped with a burner device in accordance with any one of previous claims.