FR2502282A1 - SPRING VALVE - Google Patents

Abstract

THE INVENTION RELATES TO A SPRING VALVE. THIS VALVE INCLUDES A BODY 11 IN WHICH A PASSAGE 13 EXTENDS, A HELICOIDAL SPRING 29 EXTENDING LONGITUDINALLY FROM THE BODY 11, A VALVE member 33 IS PROVIDED INSIDE THE SPRING 29 AND DESIGNED TO CLOSE THE END OF OUTPUT OF THE PASSAGE 13, AS WELL AS AN ELEMENT 31 PROVIDED AT THE OUTER END OF THE SPRING 29 TO COME TO ENGAGE ON THE VALVE ORGAN 33 AND CONFIN IT INSIDE THE SPRING 29, THE VALVE BEING DESIGNED TO S ' OPEN AGAINST THE PUSH OF THIS LATEST. THE INVENTION IS USED, FOR EXAMPLE, BETWEEN AN AIR COMPRESSOR AND A TANK TO CONTROL THE DISCHARGE OF AIR FROM THE SECOND TO THE FIRST.

Description

The present invention relates to valves

  and, more particularly, action air valves

born by a spring.

  In one aspect, the invention relates to a

  pope of restraint which, when put into service, is

  connected between an air compressor and a tank

  designed to store compressed air from the compressor to control the discharge of air from the tank to the compressor. Usually, the outlet end of the check valve is screwed into the tank inlet, an air line being connected between the air compressor and the inlet of the valve. A

  valve according to the present invention is particularly suitable

  this type of use, that is to say it lends itself to an application in which its

  outlet end is screwed into the inlet of a

  tank. In another aspect, the invention relates to a

  safety valve for discharging the air of an element

  containing air under pressure when this

  dr) pressure rises above a predetermined level.

  Among the different objects of the present

  tion, there may be mentioned those of providing an improved spring seat, for example, a

  retaining valve or safety valve, of a con-

  economic and simplified stuff; provide a valve with a minimum of parts and easy assembly; firing a check valve including the valve member

  can be easily inspected without demonstrating

  valve floor; providing a check valve with movable tines mounted without being enclosed at the outlet end of the valve to provide a milk cost; provide a check valve that can be installed so that its unenclosed moving parts exit into a protected enclosed space such as the inlet of a compressed air storage tank or

  amumlogues; and provide a safety valve that initiates

  can be easily adjusted, for example, to the opening pressure, then protected against

a setting change.

  1, a valve according to the present invention

  The invention includes a body through which a passage extends to an exit end. A helical spring is attached to the outside of the valve body at the outlet end thereof and extends longitudinally therefrom. A valve member is disposed within the spring and is adapted to close the outlet end of the passage, a member being provided at the downstream end of the spring for engagement with the valve member and confine him

  inside the spring. The spring is bandaged and the

  mentioned above, intended to engage and confine

  the latter normally presses the valve member.

  valve body to close the outlet end of the passage, the valve member being adapted to

  open against the thrust of the spring.

  2.0 Other objects and features will be in

  obvious part and underlined in the description of the

below.

  In the accompanying drawings: FIG. 1 is a longitudinal section of a

  a check valve according to the present invention,

  in a tapped hole such as the entrance to a tank

  compressed air, the valve being shown in

closing position;

  FIG. 2 is a section similar to FIG.

  re 1, but illustrating the valve in the open position

  re; Figure 3 is an end view of the outlet end of the valve of Figure 1; FIG. 4 is a longitudinal section of a

  safety valve according to the present invention, illus-

  in the closed position; and Figure S is a cross-section taken

  along line 5-5 of Figure 4.

  The same reference numerals designate

  corresponding parts in the different figures.

  Referring first to Figures 1-3 of the accompanying drawings, a check valve in accordance with the present invention, generally designated by reference numeral 1, is illustrated in its position.

  mounting in a threaded hole such as the input file-

  3 in the wall 5 of a storage tank

  for example, a tank for storing compressed air supplied by a compressor via the valve

  The inner surface of the wall of the

  storage tank is designated by the number 7 and

  its outer surface, by the number 9.

  As shown in the drawings, the check valve 1 comprises an elongated body 11 of a metal such as brass, through which an axial passage 13 extends from its inlet end 15 to its outlet end 17. inlet end of this body has external threads 19 for connection of a

  pipeline, for example from a compressor, this

  end comprising a hexagonal head 21 located downstream of the threads 19 and for receiving a key. l Downstream of the hexagonal head, the body carries a rod

  or a cylindrical portion threaded externally 23 des-

  ready to screw into the inlet 3 of the storage tank. At its outlet end and downstream of the cylindrical threaded portion 23, the valve body

  comlrporte a cylindrical extension narrowed 25 of a dia-

  lower than that of input 3. This extension has a relatively coarse external thread

  (lef! inserting a circumferential groove.

  A helical spring 29 of cylindrical shape

  is located on the outside surface of the di-

  reduced meter 25 of the valve body from which it

  extends in the longitudinal direction (downstream), coaxially

  compared to this body. The spring has a diameter

  lower than that of the inlet 3 of the storage tank

  swimming, but large enough to allow him to

  n fit fit with a tight fit over the extension 25 by coming engage in the thread 27 of the latter. The diameter of the wire of which the spring is constituted, is relatively small, so that the turns of this spring are engaged

  deep enough in net 27, thus subjecting

  if firmly the spring to the valve body. As shown in FIG. 3, at its downstream end, the spring comprises a spiral convolution directed inwardly 31 generally in a transverse plane

  defining a portion of the spring which extends radially

  inwards and partially closes its

outside (downstream).

  A valve member 33 preferably

  but not necessarily of an appropriate plastic material

  for example reinforced polytetrafluoroethylene

  fiberglass, is arranged concentrically

  the end of the spring between, on the one hand, the end 17 of the extension 25 of the valve body which constitutes the seat of the check valve, and, on the other hand, the spiral convolution 31 of the spring inside.

  this valve member is confined by the circumference

  evolution. In the embodiment illustrated in

  the drawings, the valve member consists of a

  that relatively thick, but we can use organs

  m: i having other configurations, for example, a sphere.

  The spring has a calculated length so that,

  when assembled to the valve body and that the

  Valve range is confined between the seat 17 and the end convolution 31, it is energized by the presence of the valve member. The convolution

  31 is engaged on the outside (downstream side) of the

  valve and, as shown in Figure 1,

  normally presses the latter against the end of

  or seat 17 of the valve body, thereby closing the outlet end of the passage 13. Commoe the watch

  In FIG. 2, the valve member 33 opens to the

  of the spring thrust when the pressure

  upstream of this valve member (inside the

  sage 13) exceeds the pressure prevailing downstream of the organ

  of a valve overcoming the spring tension.

  As described above, the check valve of the present invention is of an assembly

  easy and inexpensive, considering that it includes

  a minimum number of pieces (in this case, three),

  see the body, the spring and the valve organ proper-

  it is said. Since the moving parts of the

  valve (that is, the spring 29 and the spring member

  Pope 33) are not enclosed by the valve body,

  they can be easily inspected without having to

  fit the valve. The valve is particularly suitable

  well to a use in which its end

  outlet is screwed into the inlet of an

  warehousing or other enclosed space, moving parts

  being protected against fouling and deterioration

  because they are located within the area of

  tank. It also appears that the valve of the in-

  The invention is characterized by lower pressure losses compared to prior art valves.

  equipped with a spring retainer.

  Referring to Figures 4 and 5 of the drawings

  ), a safety valve in accordance with this

  The invention, generally designated 35, comprises an elongate tubular body 37 made of a metal such as brass, in which an axial passage 39 extends from its inlet end 41 to its outlet end 43. The body has, between its ends, a hexagonal head 45 adapted to receive a key for rotating the valve. EIn upstream of this head, the body comprises a first portion or rod 47 threaded externally. Downstream of the head, the body comprises a second cylindrical portion 49 comprising an outer annular flange 51 located in the immediate vicinity of the head, as well as external threads 53 situated downstream of this flange. At its outer end, the cylindrical portion 49 has a circular inner cavity 55 in which a valve seat 57 extends downstream. The downstream end of this seat 57 is located upstream of the downstream end of the part

cylindrical 49.

  A helical spring 59 of cylindrical shape is adapted to the thread 53 formed on the outer surface of the cylindrical portion 49 of which it

  extends in the longitudinal (downstream) direction coaxially

  compared to the body. The diameter of the metal wire

  the spring is made up of, is relatively small, so that the turns of this spring

  come deeply into the net 53.

  As shown in FIG. 5, the spring comprises an inwardly directed spiral convolution 61 defining, at the downstream end of this spring, a

  part which extends radially inwards gener-

  in a transverse plane of the latter, constituting

  thereby killing an element intended to engage a valve member (generally designated by the

  number b3) and confine it inside the spring.

  The valve member 63 consists of a disk

  tS5 having, on its upstream side, a cylindrical portion

  hundredth diameter of reduced diameter 67 that can come

  wager in the cavity 55 of the exit end of the body

  valve. This cylindrical portion 67 includes a

  circular core 69 in which a resilient disk-shaped seal 71 (made of a suitable elastomeric material) which is

  engage the valve seat 57. The

  pope has a rod 73 extending downstream to

  firing valve disc b5 through the convolution end o1 spring. This rod 73 comprises, at its downstream end, a transverse hole 75 in which

  is introduced a pull ring 77.

  For the downstream end of the valve 35, is

  provided a cover 79 in the form of a cylindrical cap

  that spaced from and surrounding the cylindrical portion 49 of

  valve body 37, the spring 59 and the drive disc

  65. At its upstream end, this cover is fixed to the valve body by crimping its flange 81 below the flange 51 between the latter and the head.

  45. The lid has several openings

  tures or fluid outlet ports (air) 83 (for example, four) in its side wall, and a central opening 85 in its downstream end

  and through which the rod 73 extends.

  When it is put into service, the safety valve

  35 is screwed into a threaded hole communicating with a pressurized space and operates to limit the pressure of the fluid contained in this gap. As shown in Figure 4, the spring 59 normally pushes the

  valve disc 65 against the valve seat 57.

  The valve member b3 opens against the push

  spring 59 when the pressure upstream of the valve disc exceeds the atmospheric pressure (that is to say the pressure prevailing downstream of the disc)

  of a value that overestimates the strength of the spring. The flui-

  (Under pressure then escapes beyond the soul disc) ape through the orifices 83. During the manufacture of the valve, the spring 59 is initially adapted to the thread 53, before the application of the lid or hat 79, until the thrust he exerts on

  the valve member 63 corresponds to the exhaust pressure

  desired. The spring automatically retains

  its adjusted position, thus maintaining the pressure of

  predetermined pemenit. Then apply the lid

  or cap that serves to prevent any manipulation of the

  fate. The valve can be manually opened at any time by pulling on the ring 77.

  In view of the description above, it is understood

  that we realize the different objects of the invention

  tion and that other advantageous results are obtained.

  Since various modifications

  could be made to the embodiments described above without departing from the frame of the invention, it is

  It is understood that all the details mentioned in the

  above or illustrated in the accompanying drawings are for illustrative purposes only and not

in a limiting sense.

RLVIENI) I CAT I () NS

  1. Valve comprising a body through the-

  a passage extends to an outlet end, a coil spring attached to the outside of the valve body at the aforesaid outlet end and extending longitudinally therefrom, a valve member disposed at the interior of the spring and adapted to close the outlet end of the passage, and a member mounted at the outer end of the spring for engaging and confining the valve member therein. spring, the latter being bandaged, while the aforementioned element acts to press the valve member against the valve body to close the outlet end of the passage, the valve member being adapted to open to the valve member; against the thrust of the

spring.

  Valve according to Claim 1, characterized

  in that the helical spring is fitted into a substantially circumferential groove in

  the outer surface of the valve body.

  Valve according to Claim 2, characterized

  riseable in that this virtually circumferential groove

the is defined by a thread.

  4. Valve according to claim 1, characterized

  in that the valve member has a circular profile

  and is arranged concentrically inside the

coil spring.

  Valve according to Claim 1, characterized

  ridiculous in that the element intended to engage on

  and confine the valve member consists of a part

  ) of the spring extending radially inwards

he's his outer end.

  b. Valve according to claim 1, characterized

  risie in that the element intended to engage on

  and confining the valve member consists of a cir-

  M5 convolution of the spring that spirals towards the in-

  at the outer end of the latter,

  partially mantle this end.

  7. Valve according to claim 1, characterized

  in that the valve body has a part.

  cylindrical having a reduced diameter extension at its outer end, the coil spring being

  subject to the outer surface of this extension.

  Valve according to Claim 7, characterized

  in that this cylindrical portion of the valve body is threaded externally, so that

  this valve body can be screwed into a

  rage in which are housed the spring hélicol-

dal and the valve member.

  9. Restraint valve for mounting in the threaded inlet of a storage tank or the like, which valve includes a body through

  which a passage extends to an end of

  a cylindrical portion having a reduced diameter extension at the outlet end of the body of

  valve, this cylindrical portion being externally threaded

  to be screwed into the aforementioned entrance in

  which the above-mentioned extension is lodged and

  goes out into the storage tank, a coil spring

  a diameter smaller than that of the pre-

  cited and which is subject to the outer surface of the portion of reduced diameter from which it extends longitudinally, this spring cqmportant, at its

  outer end, a spiral convolution di-

  inward rim that partially surrounds this

  end and a valve member designed to

  - the outlet end of the passage and disposed in the spring between the downstream end of the extension and the

  r, owvolt itn spiral directed inwards, la-

  iac engages it on this valve organ, the res-

  ort is bandaged to push the latter against the

  downstream of the extension in order to close the passage,

  the valve member being adapted to open at the

be the spring thrust.

  10. Restraint valve according to the claim

  9, characterized in that the valve member has a circular profile and is concentrically disposed within the coil spring.

  11. Restraint valve according to the claim

  9, characterized in that the coil spring

  is fitted into a virtually circumferential groove-

  arranged in the outer surface of the extension.

  12. Restraint valve according to the claim

  It is characterized in that this groove

  circumferential circumference is defined by a thread.

  13. Safety valve comprising a body through which a passage extends to an end

  the body having, at its end,

  a cylindrical portion externally threaded, a helical spring adapted to the thread formed on the aforesaid cylindrical portion from which it extends longitudinally, a valve member arranged

  inside the spring and designed to close the

  the output of the passage, an element mounted at the end

  outside the spring and coming to engage

  valve to confine it within this res-

  which is engaged, which element acts to press the valve member against the valve body in order to

  close the exit end of the passage, while the

  valve is designed to open against the thrust of the spring, and a cover provided for the latter and secured to the valve body, this lid

  having at least one outlet opening.

  14. Safety valve according to the claim

  13, characterized in that the valve member has a

  circular profile and is concentrically arranged

inside the coil spring.

  15. Safety valve according to the claim

  13, characterized in that the element intended to

* nir engage on and confine the valve member is

  consisting of a part of the spring which extends radially

  inwardly at its outer end.

  16. Safety valve according to the claim

  15, characterized in that the member for engaging and confining the valve member is a spring convolution which spirals inwardly to the outer end.

  of the latter, by partially closing this

you.

  17. Safety valve according to the claim

  13, characterized in that the cover has the shape

  a hat that is spaced from and surrounds the cymbal portion

  lindrique and the spring, while being attached to the body of

valve by its edge.

  18. Safety valve according to the claim

  17, characterized in that at the output end

  mentioned above, the cylindrical portion has a cavity

  to receive the valve member, and a valve seat emerging in the cavity and on which

  to engage the valve member, the latter comprising

  as a stem extending outward through the

  cover, as well as the element of commitment and confi-

ment.

  19. Safety valve comprising a tubular body

  elongated area having, between its ends, a head

  intended to receive a key, a first part

  externally upstream of this head, and a seconie cylindrical part downstream thereof, cettr cylindrical portion having an annular flange

  near the head, while it is externally threaded

  downstream of this flange, a passage extending

  through the tubular valve body from the end

  outermost part of the first part to the end

  Outside the cylindrical part, a coil spring

  adapted on the thread formed on the cy-

1.3

  lindrique from which it extends longitudinally-

  a valve member disposed within the spring and adapted to close the outlet end of the

  passageway, the spring having at its outer end

  a spiral convolution directed towards the

  which partially closes this end of the

  comes out and engages the valve member to confine it inside the spring, which is bandaged, this convolution acting to support the organ of

  valve against the valve body in order to close the ex-

  leaving the passage, while the organ of

  pope is designed to open against the spring thrust, a hat spaced from and surrounding the party

  cylinder and the spring, while being fixed to the

  IS of annular by its rim, this cap having at least one outlet opening, while the valve member having a rod which extends outwardly

  through the convolution and the hat.

  20. Safety valve according to the claim

  19, characterized in that it also includes

  at the outer end of the stem and downstream of the

  skin, a ring by means of which traction can be exerted manually on the valve member in order to

to open the valve.

  21. Safety valve according to the claim

  19, characterized in that the cylindrical part comlporite, at the aforementioned outlet end, a cavity Jest tne receive the valve member, and a

  valve seat emerging in this cavity and on the

  ) that it can come and engage this valve organ.

  Safety valve according to the claim

  21, characterized in that the valve member

  wears a central elastic seal that can

  engage the valve seat.

  355 23. Safety valve according to the claim

  19, characterized in that the cover is

  ti has the annular flange crimping its rim in

  below this flange between this last and the head.