FR2838806A1 - Filling tap for pressurized gas bottle comprises body having valve controlled by handle for releasing gas passage and gas outlet drilling downstream of valve, chamber in outlet drilling forming valve seat - Google Patents

Abstract

The filling tap comprises a body (1) having a valve (5) controlled by a handle (9) for releasing or closing the gas passage (3). It has a gas outlet drilling (13) emerging downstream of the valve. The tap comprises a chamber (14) formed by the widening (19) of the outlet drilling. The chamber upstream end forms a valve seat (15) and a stop (18) integrated in its wall is retractable under a force greater than a threshold value. A hollow cylindrical valve (30) closed by a bottom at its upstream end is edged by a valve seat surface and housed in the chamber. A guide boss is continued upstream and downstream by a ramp. Independent claims are included for a tap tool and equipment for the filling of a gas bottle.

Description

The present invention relates to a controlled filling valve for

  pressurized gas cylinder comprising a body which

  mounted on the bottle, comprising a valve controlled by a poi

  gnee and cooperating with a seat to free the passage of gas or iron-

  s sea, as well as a gas outlet formed by a hole leading to the

  level of the valve, downstream of it.

  Some industrial gas cylinders should not be able to

  be filled only in approved facilities, as these bottles require

  are subject to verification and should be used under very poor conditions

o precise.

  However, the usual taps for industrial gas bottles simply include a valve which turns to release more or less a flow rate, this tap being possibly followed by a regulator etc. s But such a gas cylinder can be filled in

  conditions not allowed from the tap outlet.

  The present invention aims to remedy this situation and proposes to create a controlled filling valve for a cylinder of pressurized gas, not allowing the filling not to

torises through the tap outlet.

  To this end the invention relates to a tap as described

  defined above characterized in that it comprises - a chamber formed by an enlargement of the outlet bore, this chamber having an upstream end forming a valve seat and a downstream end as well as downstream end, a stop integrated in the wall of the chamber and retractable under the effect of a force greater than a threshold, - a hollow cylindrical valve, open at the downstream end, closed by a bottom at its upstream end, this bottom being bordered by a surface for mant valve seat , having - at least one orifice connecting the interior of the cylinder through the wall, at a point downstream of the sealing surface, and a guide boss continuing upstream and downstream by a ramp, - The downstream end of the valve is guided in sliding in the outlet perage while the boss is. guide in the room between the seat of

flap and retractable stop.

  Any thrust exerted from downstream applies the valve against its seat and closes the passage to the bottle while the pressure of the gas, after opening the valve, pushes the valve against the stop is camotable and opens the passage. This valve can be placed in the filling position of the bottle by passing its boss beyond the retractable stop, by exerting on the valve a tensile force greater than the threshold, to retain the valve away from the surface forming the seat. valve, and allow authorized filling of the bottle through its

distribution outlet.

  According to another characteristic, the valve according to the invention and such that the body comprises, above the surface forming the seat of the valve, a chamber receiving a valve mounted floating, and a spring which separates the valve from the seat, a diaphragm covering the valve, this diaphragm being blocked by a screw plug in the body and receiving the screw piston provided with a handle for screwing the piston and

close or open the valve.

  According to another characteristic, the valve comprises a circular recess for the attachment of a tool intended to pass the valve from one position to the other relative to the retractable stop. This valve can be gripped by a tool of which [ orientation is arbitrary

  since the recess is peripheral.

  This solution is particularly advantageous for fixed equipment which cannot be rotated to adapt to the position taken by the valve around its axis: e. Indeed, the valve being of circular symmetry and not being held blocked in a certain orientation, this orientation around its axis changes according to the movements of the valve. In the case of a simple hand tool, it is easy to turn the tool to find the hole in the valve and insert the ends of branches into it and hang on to it. In the case of more complex equipment, this orientation is not always possible, also the peripheral recess allows the attachment in any tail orientation re

  lative of the valve and the corresponding end of the tool.

  According to another advantageous characteristic, a tool for such a filling tap consists of branches belonging to a tubular piece and provided, at one end with a boss, as well as a rod intended to spread the branches by sliding between them , the branches being carried by a handle and the rod by a handle, these two handles being separated from one another by a spring so as to re-push the rod naturally from the area of the bosses of the branches so that they these can approach in the position of introduction of the tool into the valve, the approximation of the handles producing the displacement of the rod and the separation of the bosses then coming into engagement in the valve to allow it to be pulled or pushed towards the neutralized position

or to the active position.

  This tool can catch on the orifices of the valve and, in this case, it has tongues with bosses oriented in a homologous manner around the a; e of symmetry or rotation. In the case of a valve with a peripheral or circular recess, the tool may be simpler. I1 can be a tool like the one defined above or o a tool comprising bulging bosses carried by two lans

lookouts only.

  The invention also relates to equipment for filling a gas cylinder provided with controlled filling, this equipment comprising a tool for entering the valve and allowing the valve to pass from one side or from the other. other of the esca motable stop of the tap, to put the valve in neutralized position allowing filling through the tap or in the active position inter

saying the filling.

  Drawings The present invention will be described below in more detail with the aid of an exemplary embodiment shown schematically in the accompanying drawings in which: - Figure 1 is an axial section of a tap for a gas cylinder in. position of use, - Figure 2 is an axial section of the valve, - Figure 3 is a perspective view of the valve, - Figure 4 is a schematic axial section of the valve of Figure 1 in the filling position, - the Figure 5 is a view of the tool to neutralize the valve or put it back

be in position.

  - Figure 6 is an axial section of the valve of Figure 1 with the stine tool to neutralize the valve and the valve, - Figure 7 is a sectional view similar to that of Figure 2 of another embodiment of a valve according to the invention, - Figure 8 shows in section a valve provided with a valve according to Figure 7 with a tool for moving the valve, - Figure 9 shows the valve with the valve according Figure 7 in the neutralized position, - Figure 10 is a sectional view of a quick-release manual caliper for the filling of a gas cylinder filled with age control, in installation position of the bottle only the tap is shown, - Figure 11 is a sectional view similar to that of Figure 10, showing the tool engaged in the valve.

Description of embodiments

  According to Figure 1, the invention relates to a valve for a pressurized gas cylinder. This valve says a controlled filling does not

  not allow the bottle to be filled from the gas outlet.

  o Throughout the description, the expressions << downstream, and

  <upstream>, refer to the normal direction of gas flow from the cylinder

towards the exit.

  The valve consists of a body 1 provided with a conical tee 2 part intended to be screwed onto a gas cylinder not represented on side A. This body 1 is crossed by the gas channel 3 ending in the upper part with a raised annular surface 4 forming a seat for a free valve 5 lifted by a spring 6 pressed against the body 1 around the seat surface 4 and coming to push against the edge of the valve 5. The valve 5 and the spring 6 vent housed in a chamber into which the channel 3 opens. The upper part of the body 1 is closed by a plug 7 provided with a screw piston 8 secured in rotation

  tion of a control wheel 9. The plug 7 is screwed into the body 1.

  The piston 8 has a domed head 10 which bears against the domed surface 11 of the valve 5. In this embodiment of the

  2s valve 5 is enclosed by a flexible veil 12, for example metallic.

  This veil 12 can be elastically deformed by the head 10 of the screw 8 to push the valve 5 against the seat 4 close the passage or vice versa

the liberator.

  The chamber in which the gas leaving the channel 3 arrives, when the valve 5 is lifted from its seat 4, is connected to an outlet hole 13. This hole comprises a chamber 14 formed by an enlargement of the diameter of the outlet hole 13. This chamber 14 has an end downstream 15 and an e: upstream end 16. The upstream end forms a step between the part of enlarged diameter and the normal section of the hole 13 for the gas outlet. At this detachment there is a seal 17. The chamber 14 is also provided with an integrated tee 18, retractable in its peripheral housing when it is pushed back there by a force greater than a threshold defined by the elasticity of

  stop. This stop 18 integrated into a peripheral groove of the chamber

  bre 14 is a split ring which normally protrudes from

  at his throat. The downstream part of the chamber 14, the enlarged or extended part

  gement 19 of this chamber 14 and the gas outlet hole 13 wind re arises in the part 20 screwed on the body 1. This realization is

  necessary for the installation of the parts as will be seen below.

  The part 20 is screwed by its thread 21 on a corresponding thread of the body 1 and at its end it carries a thread 22 for connecting

  the outlet equipment, in particular the regulator not shown.

  o The chamber 14 and the extension 19 house a valve 30 shown separately in FIGS. 2 and 3. The valve 30 has a hollow cylindrical part 31, of which the downstream end 32 is open while the upstream end 33 is closed by a domed bottom 34, bordered by a shoulder 35. The domed shape 34 is intended to cooperate with the seal 17 when the valve 30 is pushed to the left (Figure 1). The valve is provided with orifices 36 for example trots orifices 36, distributed regularly, peripherally, in the wall to allow the fluid to pass through.

  the outside of the valve towards the inside of the cylindrical part 31 of the latter.

  Finally, on its external surface, the valve 30 includes a mistletoe boss 37 having a circular peripheral surface 38 bordered on either side with ramp-shaped surfaces 39, 40. The ramp surface 40 also forms a shoulder. 41 intended to serve as a support for a compression spring 42 for pushing the valve 30 upstream, bearing against the seal 17 forming a sealing seat, at the inlet of the gas outlet bore. The valve 30 is guided by its cylindrical surface 31 in the bore 19 continuing the chamber 14 having a diameter sufficient to receive the spring at least partially surrounding the cylindrical surface 31. In the normal position of use (FIG. 1) the valve 30 is placed in the chamber 14 so that its boss 37 is located between the seal 17 and the retractable stop 18. By the pressure of the gas arriving from the bottle, the valve 30 will be pushed back against the retractable stop 17 by compression of the spring 42. The gas coming from the bottle then passes from the periphery of the valve 30 through the holes 36 and into the valve 30 to

escape through exit 32, 13.

  The gas outlet is represented by the arrow at the end B.

  The tap with its valve 30 occupying the repre-

  shown in Figure 1, if you want to refill the bottle through the outlet 13 and the valve 5 open, the valve 30 will already be applied against its seal 17 by the spring 42 and the differential pressure exerted by the gas introduced into outlet 13, the valve 30 is pressed against its

  seat, closing the passage. The gas cannot refill the bottle.

  To load the bottle, the valve 30 must be put in the position represented in FIG. 4. In this position, the boss 37 of the valve is passed beyond the retractable stop 18. The valve 30 is retained or naked in this position with a sufficient force so that the gas jet that is applied to the outlet 13 to charge the bottle (in the opposite direction to the usual path! of gas distribution) is not sufficient to cause the valve to pass beyond the stop retractable 18. As the valve 5 is released from its seat, the filling gas can pass through the interior of the valve 30, exit through the orifices 36 then pass under the

  pope 5, lifted (screw 8 being in the high position) and reach the bou-

  At the end of the filling, the valve 5 is closed with the handwheel 9 and after having disconnected the gas supply from the outlet 13, the valve 30 can be passed beyond the retractable stop 17 in the position

shown in Figure 1.

  Figure 5 shows a tool 50 to neutralize or replace the valve 30 and Figure 6 shows the establishment of

  the tool 50 to neutralize the valve 30.

  This tool 50 consists of a first handle 51 carry: 5 a sleeve 52 terminated by trots branches 53 distributed in an equangular manner and each provided with an e: tremite 54 curved towards the axis and with a boss 55. The tool also includes a second handle 56

  movable in sliding with respect to the first handle 51. This se-

  handle 56 carries a rod 57 passing through the first handle 51 and the

  sleeve 52 and serving as a spacer. This rod 57 is normally in re-

  line in the tube 52. To neutralize the valve 30 for filling the bottle, the tube 52 with its branches 53 is introduced through the orifice 13

tap.

  By pressing the handle 56 the rod 57 is advanced

  3s to spread the tabs 53 by wedge effect and properly hang the bos-

  wise 55 in the holes 36. We can at this time fire on the valve 30

  to the right according to figure 6 to use the effect of the ramp 40 to es-

  camouflage the stopper 18 and pass the boss 37 downstream of the stopper 18.

  Then the handle 56 is released. The spring 58 which separates the wrists 51 and 56 retracts the spindle 57 and the ends 54/53 of the tool return to the normal position. We can then extract the tool 50 from the

valve 30 thus moved.

  To put the valve 30 in its normal, non-neutralized position, it suffices to introduce the tool 50 through the outlet orifice 13 of the valve and press with the end 54 of the tube 52 against the inside of the bottom 33 of the valve 30 and use the other ramp 39 to retract the stop 18 and pass the valve 30 beyond the stop, in the position of the fi

l0 gure 1.

  FIG. 7 shows, in section, an alternative embodiment of the valve allowing the use of a tool different from the tool 50 described above. This 30A valve is. for the most part, in the same form as that lS in FIG. 2 and bears the same references for the same elements of which

  the description will not be repeated. This variant of valve 30A stands out

  gue of the valve 30 above by a recess 43 made in the cylindrical part 31. This recess 43 circular ends in two abutment surfaces 44, 45 for receiving the end of a tool not coming into the orifices 36. In in this case, the tool does not have to be oriented relative to the valve in order to engage in the orifices. The tool can be attached to the tail regardless of the rotation orientation of the valve. This possibility is essential for a machine or equipment which cannot be rotated relative to the tap and therefore relative to the valve. It is carried out: 5 in a manner analogous to the tool 50 already described except that this tool 50A has an end formed by two tongues 53A with rounded external contours substantially in the shape of a ball and between which comes the end of the rod 57 pushed by the 'one of the handles, the other being fixed, so as to separate the two tabs 53A and bring the deug bosses 55A, ar rounded, in the recess 43. We can then pull the valve 30A to the right according to Figure 7 in possibly bearing against the abutment surface 44. The valve 30A can also be pushed to the left by pressing against the abutment 45 .; FIG. 8 shows the installation of a tool 50 like the tool of FIG. 5 in the recess 43 of the valve 30A of a tap whose

  the various elements already described will not be described again here.

  Figure 9 shows the position of the valve 30A, neutralizes

  after using the tool 50 according to FIG. 7 or that of FIG. 8.

  Figures 10O, 11 show the application of the invention to a

quick release clamp 100.

  According to FIG. 10, the tap is represented for a view from above, only appearing its handle 9 and the body 1 placed on a needle s 101 carried by the branch 102 of the stirrup 100. The body 1 comprises, at this location, a housing to receive the needle screw. This housing is in the position diametrically opposite to that of part 20 screwed on the

body 1.

  Against this piece 20, we come to apply the parse of junction o tion 103 of a rotary head 104, provided with a lever 105. This head moves mobile in translation by a ramp effect 106 not detailed, relative to the part freezes of this manual stirrup. This fixed part is represented, for example, by the branch 102 and other elements such as the poi

gnee 107 '.

  s The rotating part rotates around the axis XX by half a turn.

  Due to the ramp effect, the cylindrical part 103 advances and engages on the end of the part 20 to achieve sealing. The head 104 comprises a filling pipe 107 connected to a gas source which is not shown. This pipe 107 opens into the chamber 108 which communicates only with the interior of the room 20 and the tap through the funnel passage.

109 made in room 103.

  The tool of this manual caliper which makes it possible to neutralize or activate the valve 30A is similar to that described above. This tool 50A comprises a part 51A equivalent to the handle 51 and a second handle 56 identical to the second handle of the tool 50. The two parts 50A, 51A are separated by a spring 58 and they slide one relative to the other. Vis-à-vis the independent tool of Figure 5, this tool stands out in that it is mounted in the bracket and, in particular, in the piece 110

which serves as a stop for piece 51A.

  A return spring 111 acts on the assembly in the

conditions described below.

  The tool 50A here consists of two branches 53A located on either side of the plane of Figure 10 (in Figure 7, the tool is rotated

  around its axis XX).

  These two tongues 53A terminate in rounded ar bosses 55A intended to move apart and to come into the recess 43 (see fi

gure 7) to stall there.

  The branches 53 are integral with the piece 51A while the

  rod 57 is integral with the second handle 56.

  At the start, to introduce the tool 50A into the valve 30A, one pushes on the handle 56. The latter pushes the part 51A and the assembly is placed to penetrate into the valve 30A. When the assembly is in place, part 51A is. in fact, in abutment against the piece 110 so that by pressing the handle 56 (pushing it to the left according to Figure 10), we

  moves the rod 57 relative to the tabs 53A which move apart and lock

quent in the recess.

  l0 In this position, the rod 57 can be locked using a retractable latch not shown so as to secure the grip 56 and the part 51A. We can then pull the valve 30A to the right beyond the stop 18 to neutralize it. The filling operation can then be carried out through the pipe 107 and the paths 108, 109 then the tap. At the end of filling, to return the valve 30 to the active position, it suffices to push on the handle 56 to cause the valve A to pass beyond the retractable integrated stop 18. Then, the handle 56 is separated from the part. 51A by releasing the lock not shown. The res 58 then recalls the rod 57 which allows to extract ['together then

  that the tabs can approach and come out of the recess 43.

  The installation of the tool 50A in the recess shows that there is no need to turn the tool around its axis as it would

  necessary to hang with the tool 50 in the holes 36.

  2s It should also be noted that the tool 50 can, in principle, also be used with the recess 43 of the valve 30A. However, it is more efficient to use a tool with two branches like the 50A tool which is more

  simple and allows better hanging in the recess 43.

  Figure 11 shows the position of the tool engaged in the cla

  pet, but the latter is still in the active position.

R E V E N D I C AT I O N S

  1) Controlled filling valve for pressurized gas bottle comprising - a body (1) which is mounted on the bottle, comprising a valve (5) controlled by a handle (9) and cooperating with a seat (4) for binding the gas passage (3) or close it, as well as a gas outlet formed by a hole (13) opening at the level of the valve, downstream of it, characterized in that it comprises o - a chamber ( 14) formed by an enlargement (19) of the outlet hole (13), this chamber having an upstream end forming a valve seat (15) and a downstream end as well as before the downstream end, a stop (18) integrated into the wall of the chamber (14) and retractable under the effect of a force greater than a threshold, - a hollow cylindrical valve (30), open at the downstream end (32), closed by a bottom (33 ) at its upstream end, this bottom being bordered by a surface forming a valve seat (35), having at least one orifice (36) connecting the interior of the cylinder through the oi, at a point downstream of the sealing surface, and a guide boss (37) continues o wind upstream and downstream by a ramp (39, 4O), ex: downstream tremite of the valve is guided in sliding in the outlet hole (19, 13) while the boss (37) is guided in the chamber (14) between the valve seat (16) and the retractable stop (18) from the downstream applying the valve (35) against its seat (15) and close the passage to the bottle while the gas pressure, after opening the valve, pushes the valve (35) against the camotable stop (18) and opens the passage, the valve (35) being able to be placed in the filling position of the bottle by passing its boss (37) beyond the retractable stop (18), by exerting on the valve (35) a tensile force greater than the threshold, to hold the valve (35) away from the surface (15) forming a valve seat, and allow authorized filling of the bottle through its fate ie

of distribution.

  2) A valve according to claim 1, characterized in that the body (1) comprises, above the surface forming the seat (4) of its pope, a chamber receiving a valve (5) mounted floating, and a spring (6 ) which separates the valve (5) from the seat, a diaphragm (12) covering the valve, this diaphragm being blocked by a plug (7) screwed into the body (1) and receiving the screw piston provided with a control wheel (9)

  to screw the piston (8) and close or open the valve.

  3) A valve according to claim 1, characterized in that the valve (30A) has a circular recess (43) for the attachment of a tool intended to pass the valve from one position to another by rap

o port at the retractable stop.

  4) Tool for a controlled filling valve for a gas cylinder

  under pressure according to claims 1 to 3,

characterizes in that

  it consists of branches (53) belonging to a tubular and movable part

  nies, at one end (54) of a boss (55), as well as a rod (57) intended to spread the branches by sliding between them, the branches being carried by a handle (51) and the rod (57) by a handle (56), these two handles being separated from one another by a spring (58) so as to

  naturally push back the rod (57) from the boss area (55)

  ches (53) so that they can approach in the tool insertion position in the valve, the approximation of the handles (56, 51) producing the displacement of the rod (57) and the spacing of the bosses (55) then engaging in the valve to allow leakage or

  push it towards the neutralized position or towards the active position.

   ) Tool according to claim 4, characterized in that it comprises bosses (55A) of convex shape doors by two tabs

your (53A).

  6) Equipment for filling a gas cylinder fitted with a

  faucet with controlled filling, characterized in that it includes a tool

  lon claim 3 to enter the valve and pass it s5 on one side or the other of the retractable stop (18) of the valve, for the