FR2556243A1 - NOZZLE FOR AGRICULTURAL SPRAY APPARATUS - Google Patents

Abstract

A. NOZZLE HOLDER FOR AGRICULTURAL SPRAYER. B. THE NOZZLE HOLDER 1 INCLUDING, IN A BOX 5, A SUPPLY CONNECTION 6 WITH THE PRODUCT TO BE SPRAYED AND A NOZZLE CONNECTION 8, IS CHARACTERIZED AS A DIAPHRAGM VALVE 9, ARRANGED ON THE SIDE OF THE FITTING 6 AND FROM THE FITTING 8, AN ANNULAR CHAMBER 11 CONNECTED TO THE NOZZLE FITTING 8 VIS-A-VIS A CHANNEL 10 CONNECTED TO THE SUPPLY CHANNEL 6 AND OPENING AT THE SIDE IN THIS FITTING 6. C. THE INVENTION FINDS ITS APPLICATION IN AGRICULTURE, ESPECIALLY FOR CROPS.

Description

"Spray nozzle for agricultural spraying apparatus"

a nozzle holder for

  agricultural spraying equipment in particular, sprayed

  crop feeders, having a housing in which a feed connection of spray material is arranged

  and a nozzle connection as well as possibly another

  cord for connecting other nozzle holders, while in the housing is between the supply fitting and the nozzle fitting a diaphragm valve sealing an annular chamber with respect to a channel; A nozzle holder of this kind is already known from the German utility model 82 03 649. The diaphragm valve is arranged in this nozzle holder on the upper face of the nozzle.

  nozzle holder. When the nozzle holder is on the spray arm

  the field valve, the diaphragm valve is not accessible.

  If you need to clean or change this diaphragm valve,

  we have to dismantle the whole nozzle holder.

  On the other hand, in this nozzle holder, the device

  tion of a channel in the supply connection of the spraying member is very disadvantageous. The flow in the feed connection of spray products is

  adversely influenced by the housing of this channel.

  On the other hand, we know from the model of

  German standard 83 06 319, another nozzle holder. In the latter, the diaphragm valve is placed on the face of the nozzle holder

  which is opposite the fixing side. As a result, the

  pe membrane is accessible even when the nozzle holder is

  mounted on the spray arm of the field sprayer.

  The disadvantage of this nozzle holder is the length of its construction. This nozzle holder protrudes from the lower edge of the dispenser arm far downward. As a result, damage or contamination of the nozzle holder may occur.

  and the nozzle mounted on the nozzle holder.

  The object of the invention is to improve the carrier

  nozzle described at the beginning from the point of view of the layout of the

diaphragm valve.

  For this purpose the invention provides that the channel

  is connected with the powder supply connection

  verify, that the annular chamber is connected with the nozzle fitting, that the channel opens laterally into the fitting, and that the diaphragm valve is on the side of the supply fitting and the nozzle fitting. With this arrangement we obtain that the construction is very short and compact and at the same time, the diaphragm valve is well accessible. On the other hand, we get, thanks to these

  provisions of good flow conditions in the

  supply cord of product to be sprayed. In addition, the behavior of the diaphragm valve from the point of view of

the seal is good.

  We obtain a very short construction of the door

  nozzle because the annular chamber opens, by the part

  bottom of its front face in the nozzle connection.

  In addition, another contribution to the weakness of the

  However, the central line of the channel is below the center line of the product supply connection to be sprayed. To ensure the safety of the attachment of the membrane, it is provided according to the invention that the outer wall of the annular chamber on the side which is turned towards the valve diaphragm widens into a smooth cylindrical section with formation of an annular step, this section receiving an annular seal which is tight against

  the annular step with interposition of the edge of the membra-

  born. To ensure a good seal of the diaphragm also towards the outside, the annular seal presents on the

  face turned towards the membrane a circular bead.

  So that the annular seal is well maintained on the nozzle holder, it is provided according to the invention that the annular seal is tightened by a locking element

  cooperating with the housing, against the annular step.

  Advantageously, it is provided that, on the side of the casing on which the membrane valve is placed, slot-shaped guides are arranged next to the annular step of the annular chamber of the membrane valve, and that in these guides can sink the locking element made in the form of a bar. In this way it is realized a locking member that takes little

  space and facilitates liberation.

  In order for the annular seal to be well held on the nozzle holder by the bar, it is provided that on the outer wall of the annular seal are formed slots

  and that in these slots engage pins of the bar.

  It is also possible that sleepers are arranged on the outer wall of the seal, and that the bar carries slots that cooperate with the pins

seal.

  To compensate for manufacturing tolerances,

  and so that we can tighten the solid-

  against the diaphragm, it is expected that the pins and slots extend slightly obliquely with respect to

  straight lines extending parallel to the guides of the bar.

  Other particularities will emerge from the description below.

  after an exemplary embodiment and the accompanying drawings, in which: Figure 1 shows a nozzle holder according to the invention seen from before, - Figure 2 shows the nozzle holder in section

  along the line II-II of Figure 1.

  The nozzle holder 1 is fixed by a piece

  by spacing 2 on a spray arm of a spray-

  campaign riser in a known manner and which, therefore, is not shown.On the other hand they are provided on the upper face of the door 1, two pins 3 fixing

  which also emerge from the support of the spray arm.

  If this piece 2 blocking was to be damaged, it is expected that is pressed by the perforation 4 of each of the fixing studs 3, a safety pin, so that

  the nozzle holder continues to hold on the spray arm.

tion.

  The nozzle holder 1 comprises a casing 5 in which are arranged a spraying agent supply connector 6, another connector 7 for connection with other

  nozzles and a nozzle fitting. 8. On the other hand, the carrier

  nozzle 1 comprises a diaphragm valve 9 which ensures the

  10 of a channel 10, between the spraying feed connection 6 and the nozzle connection 8, with respect to an annular chamber 11. The channel 10 is connected to the spraying feed connection 6 and opens laterally into this connection. The center line 12 of the channel is below the center line 13 of the supply connector 6, while the center line 14 of the connector

  nozzle 8 intersects with the central line 13 of the feed connection

  6. The annular chamber 11 surrounds the wall 15 of the channel 10. On the other hand, the annular chamber 11 is connected to the nozzle fitting 8, the annular chamber opening through the lower part of its end face 16 into the

nozzle fitting 8.

  The diaphragm valve 9 is on the side of the atomizer supply connector 6 and the nozzle connector 8. The outer wall 17 of the chamber 11

  widens on the side turned towards the membrane 18 of the sou-

  pope 9 with formation of the annular step 19, on a smooth cylindrical section 20. This section 20 receives the annular seal 21 which is clamped against the step 19, with interposition of the edge 22 of the diaphragm 18, by the element of 24, in the form of a bar 23. In this way, the casing 5 is closed, so that the liquid to be sprayed can pass lossless leakage from the feed connector 6 to the nozzle fitting 8. to obtain a particularly good seal, the seal 21 has on its front face 25 facing the membrane

18, a circular bead 26.

  Inside the annular seal 21 is

  see a cylindrical clamping ring 27 which is clamped by the spring 28, which rests on the annular ring 21, against the diaphragm 18. As a result, the diaphragm 18 is pushed against the wall 15 of the channel 10, so that the membrane 18, in

  appropriate pressure conditions, can ensure the

  the duct 10 with respect to the annular chamber 11.

  In order that the spring 28 can rest against the seal 21, it has on its face which is

  the opposite of the membrane 38, a stop 31 connected by bars

  rettes 29 with the outer ring 30 of the seal 21.

  The inner zone of the sealing ring 21 widens, if we look from the side facing the membrane,

  with formation of an annular step, into a cylindrical section

  32. In the same way, the clamping ring 27 extends

  on the face which is the opposite of the diaphragm 18, with formation of an annular step, in a circular edge 33, which is inside the cylindrical section 32 of the sealing ring 21. The edge 33 of the clamping ring 27 is interrupted by notches 34, so that the clamping ring 27 can be pushed into the sealing ring

  21 and thus the edge 33 can lock in section 32.

  The clamping ring 27 has, on the face

  which is opposite the diaphragm 18, a cylindrical cavity

  in which the spring 28 is located. This spring 28 is placed in this cavity before the clamping ring 27 and the sealing ring 21 are assembled. On the face 36 of the housing 5, on which is

  fitted with the diaphragm valve 9, are mounted next to the

  1 of the annular chamber 11 of the diaphragm valve 9, the slot-shaped guides 37. These guides 37 extend parallel to the central line 14 of the nozzle connector 8. In these guides 37 is depressed the bar 23 . In

  the outer wall 38 of the sealing ring 21 are

  the two opposite slots 39. On the bar 23 are also

  two opposite bars 40 are placed, which are made so as to be driven into the slots 39 of the sealing ring 31. Thus the slots 39 can cooperate with the bars 40 of the ring 21, and ensure a solid base of the ring 21 in the housing 5 of the doorbuse 1. The bars 40 and the slots 39 extend a little obliquely with respect to straight lines 41 extending parallel to the guides 37 of the bar 23. By using inclined planes or the principle of corner, we always get a plate

solid of the membrane 18.

  If necessary, can be placed between the bar 23 and the housing 5 a security element 42, shown in dot-dots. This security element 42 is in the form of a projection 43 which is arranged on an elastic part of the bar 23 and which cooperates with a

  recess 44 formed in the housing 5.

  At the lower end of the nozzle fitting 8, the nozzle 45 is provided with a coupling nut 46 which fixes it in the housing 5. In addition, the filter 47 and the sealing ring 48 are connected by means of the nut 46 to

the end of the nozzle fitting.

  Since the diaphragm valve 9 is arranged laterally in the manner provided according to the invention, a compact and reduced nozzle holder is obtained at the same time.

  a protected disposition of the spray arm of a pul-

  field verifier, on a carrier beam 49 which is indicated by dashed lines in FIG. 2. In addition, the diaphragm valve 9 can also, when the nozzle holder 1 is attached to the carrier beam 49, be removed and rested there. The diaphragm valve functions as follows: When there is sufficient pressure in the supply connection 6 of the product to be sprayed, the diaphragm 18 is raised, against the thrust of the spring 28, of the wall 15 of the channel 10. The liquid to be sprayed then passes channel 10 into the annular chamber 11 and from there to the nozzle fitting. Finally it arrives through the filter 47 to the nozzle 45. This nozzle 45 then distributes the liquid of the

known way.

  As soon as the spraying operation has to be interrupted, the supply of liquid to be sprayed is interrupted. As a result, the pressure is lowered in the supply connection 6. As soon as the pressure in this fitting is

  went down enough to no longer suffice to maintain the openness

  The spring 28 pushes the diaphragm 18 against the wall 15 of the channel 10 by means of the clamping ring 27. The diaphragm 18 seals the channel 10 by means of the clamping ring 27.

  compared to the annular chamber 11, and consequently also the

  supply cord 6 with respect to the nozzle fitting 8. The

Nozzle 45 can no longer drip.

Claims (11)

CLAIMS V E N D I C A T I I S   1) Nozzle holder for spraying apparatus   agricultural sprayers, in particular crop sprayers, having a housing in which are disposed a spray supply connection and a nozzle connection and optionally another connection for connecting other nozzle holders, while in the casing, between the supply connection and the nozzle connection, a   diaphragm valve sealing an annular chamber by means of   port to a nozzle channel, characterized in that the channel (10) is connected with the spray supply connection (6), that the annular chamber (11) is connected with   the nozzle connection (8) that the channel (10) opens   in the connection (6), and that the diaphragm valve (9) is on the side of the supply connection (6) and the nozzle connection (8) 2) The door according to claim 1, characterized in that the annular chamber (11) opens through the lower part of its end face (16) in the connection nozzle (8).   Bushing holder according to Claim 1, characterized in that the center line (12) of the channel (10) lies below the center line (13) of the coupling   (6) supplying the product to be sprayed.   4) nozzle holder according to claim 1, characterized in that the central line (14) of the nozzle fitting (8) intersects with the central line (13) of the fitting power supply (6).    Bushing holder according to Claim 1, characterized in that the outer wall (17) of the annular chamber (11) widens into a smooth cylindrical section (20) on the side facing the diaphragm (18) of the valve with diaphragm (9), forming an annular step (19), this section receiving an annular seal (21)   which is pressed against the annular step (19) with interpo-   sition of the edge (22) of the membrane (18).   ) Nozzle holder according to claim 5, characterized in that the seal (21) has, on the end face (25) facing the membrane (18) a circular bead (26). 7) nozzle holder according to claim 5, characterized in that inside the seal (21) is disposed a cylindrical clamping ring (27), and that ring (27) clamps with the aid of a spring (28), the diaphragm (18) against the end face of the wall (15) of the channel (10).   8) nozzle holder according to claim 7,   characterized in that the inner area of the seal of   width (21) widens, if viewed from the side facing the diaphragm (18), with formation of an annular step, into a larger cylindrical section (32) than the clamping ring (27) widens on the opposite side of the diaphragm (18), with formation of an annular step, into a circular border (33), and that edge (33) of the ring   (27) is located inside the cylinder section.   drique (32) of the seal (21).   9) nozzle holder according to claim 8, characterized in that the edge (33) is interrupted by notches (34).   10) nozzle holder according to claim 7, characterized in that the clamping ring (27) has on the opposite side to the membrane (18), a cylindrical cavity   (35) and that in this cavity is the spring (28).   11) nozzle holder according to claim 7, characterized in that the seal (21) has on its face located opposite the diaphragm (18) a stop (31) connected with its outer ring (30). and that on this   stop (31) comes to rest the spring (28).   12) nozzle holder according to claim 5, characterized in that the seal (21) is clamped against the annular step (19) by means of a   locking (24) cooperating with the housing.   13) nozzle holder according to claim 12, characterized in that, on the face (36) of the casing (5) on which the diaphragm valve 9 is mounted, are arranged, next to the annular step (19) of the chamber (11) of the diaphragm valve (9), slotted guides (37) and that in these guides (37) the   lock (24), made in the form of a bar (23).   14) nozzle holder according to claim 13, characterized in that in the outer wall (38) of the seal (21) slits (39) are formed and in these slots   (39), engage bars (40) of the bar (23).    Bushing holder according to Claim 13,   characterized in that on the outer wall of the gasket   are arranged bars, and that the bar presents   slots that cooperate with the strips of the seal.   ) Nozzle holder according to one or other   Claims 14 and 15, characterized in that the bars   (40) and the slots (39) are slightly oblique with respect to the straight lines (41) which extend parallel to the guides (37) of the bar (23).   17) nozzle holder according to claim 13, characterized in that a safety element (42) is arranged   between the bar (23) and the casing (5).   18) nozzle holder according to claim 17, characterized in that the safety element (42) is designed as a protrusion (43), that projection (43) is arranged on an elastic part of the bar (23), and that this projection (43) cooperates with a cavity (44) arranged in the housing (5).