FR2607569A1 - CLOSURE DEVICE FOR A COVER - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A CLOSING DEVICE FOR A SWIVEL LID 3 OF A CONTAINER 1, 2, INCLUDING A LEVER 5 WHICH IS ARTICULATED ON THE CONTAINER TO LOCK ON A LOCKING PIN 9 MOUNTED ON THE COVER 3 AND WHICH INCLUDES A CONTROL CAM 25 IN WHICH COMES IN TAKEN, IN THE CLOSED POSITION OF THE COVER, A SNAP 37 PROVIDED ON THE LATTER. ACCORDING TO THE INVENTION, THIS CLOSING DEVICE IS EQUIPPED WITH A SAFETY SYSTEM INCLUDING A RATCHET 6, WITH TWO ARMS, ROTATED ON THE TILTING PART OF THE LEVER 5 AND OF WHICH ONE END CONTAINS A SUPPORT CLUT 30; THE SECOND END OF RATCHET 6 CARRIES AN ANGLED HEAD 31 WHICH, IN THE CLOSED POSITION OF THE COVER, APPLIES AGAINST A STOP SURFACE 32 OF THE CONTAINER, UNDER THE ACTION OF A SPRING 18, AND WHICH, IN THE OPEN POSITION OF THE COVER, HURTS A STOP NOZZLE 36 SHAPED AT THE END OF THE SURFACE 32. THIS SAFETY SYSTEM PREVENTS, WHEN THE COVER 3 IS OPENED, A SUDDEN INTEMPESTIVE RISE OF THE LATTER, IN THE EVENT OF THE PRESENCE OF A RESIDUAL PRESSURE IN THE CONTAINER 1, 2.

Description

Closing device for a lid The invention relates to a

closing device

  foldable for a lid, which is mounted so as to

  see rotating on a part of a container, and in which, on the free tilting end of the lid, is fixed a control pin which, when the lid is in its closed position, engages in a control cam and is locked therein, and wherein the control cam is mounted on the pivoting portion of a lever which is mounted

  to be able to tilt over the container and is equipped, at

  calf of its lower face, a recess which, in the posi-

  closed, engages over a bolt bolt

  placed on the cover, this locking pin can

  be cleared of the recess of the lever, under the effect of a

axial displacement.

  Such lids are known as disks

  positive closure for non-pressurized containers

  and for pressure vessels. The characteristic of this known folding closure device lies in the fact that the lid can be opened and closed without

using tools.

  However, a disadvantage of the iron

  folding arrangement known hitherto lies in the fact that, in the case of a container containing a residual pressure,

  the lid can be opened using the closing device

  known folding head and then the lid is raised

  abruptly under the effect of residual pressure still pre-

  in the container and may cause injury to the user.

tor.

  This is why the invention aims to develop

  lopper a foldable closing device for a cover

  key, of the type indicated above, so that we can use

  such a closing device also for

pressure vessels.

  This problem is solved according to the invention

  thanks to the fact that it is intended

  abrupt accidental rise of the cover in

  the case of the presence of residual pressure in the container

  a safety device with the characteristics of

  following: a) a pawl is rotatably mounted on the tilting portion of the lever; b) the pawl is in the form of a lever with two arms;

  (b.1) one end of the pawl has a

  (b.2) the other end of the pawl has a slotted head;

  (b.2.1) the ratchet head applies, in the position

  closed, on a solid abutment surface

re of the container,

  (b.2.2) the head of the ratchet strikes, in the position

  open position, an abutment beak

  the stop surface and is in solidarity with the

cipient,

  (b.2.3) the ratchet head is applied against the

  thrust face, under the action of the load of a

spring (mainspring).

  The heart of the present invention resides

  therefore the fact that the safety device

  It is imperative that the lid be open

  pletely. The safety device according to the invention allows only an opening of the lid releasing a

  slot so that any residual pressure

  in the container can escape through this slot, and that one can fully open the lid only

  after overcoming a blocking force. This invention

  tion therefore brings together the advantages of the

  known collapse, namely the possibility of opening it

  ture and closure of a lid without any tools, and the features of the safety device described, which consists essentially of a pawl which is loaded by a spring, is arranged in the tilting zone of the lever and prevents the latter can switch completely

in its open position.

  The ratchet described can be realized either under

  the shape of a lever with one arm, either in the form of a le-

  two arms, and the ratchet head applies, when the lever is opened, against an associated abutment surface,

  attached to the container, so that the lever can not

  only on a specific tilt path, which has the effect that the lid can be opened only to release a determined slot which is just sufficient

  wide enough for residual pressure, possibly

  present inside the container, may be evacuated

  outside through this slot.

  The abutment surface secured to the container and provided for locking the lever beyond the crossing of a certain opening stroke, is disposed in the vicinity of the peripheral flange of the lid. The lid itself can have different configurations and can be made in the form of a circular cylindrical disc provided with either an idle flange or a welded tubing, or

  well it can also take the form of a torospheric background-

  welded in a peripheral ring of the lid,

  which case of the retaining lugs and the control pins can

  can be welded directly to this ring of the cover.

  Configuration, type and sizing

  cover are not essential for the present invention.

  tion. The only essential point is that the farm

  folding head according to the present invention can be

  maneuvered without tools and that it has a safety device

  which only allows an opening of the lid on a certain opening angle, but does not allow an opening

  immediate complete of this lid.

  According to another characteristic of the invention the abutment surface has a tapered partial surface,

  on which the head of the ratchet is applied, when the

  vier is in the closed position, and this partial surface is

  extended by a horizontal partial surface, on the

  of which the thrust nose is located. According to another characteristic of the invention, the pawl loaded by a spring is made in the form of a lever to unbras, on the free swinging part of which is

located the support cleat.

  According to another characteristic of the invention,

  the pawl is disposed in a recess of the lever.

  According to another characteristic of the invention,

  the abutment surface has its thrust nose located on the

  this upper of a support plate which forms, in connection with a support plate located at a distance from the first

  and with an axis, the pivot bearing of the lid.

  According to another characteristic of the invention, the support plates serve for mounting a device for

  safety of the lid closure device, which

  2-0 to the following features: c) in each support plate is provided a bore which is aligned with the bore in the other support plate; d) on the front side of the outer face of a support plate, is fixed a guide tube, whose inner surface is located in the axial extension of the holes; e) in the guide tube and in the bores a axially displaceable locking pin engages,

  e.1) the locking bolt bears, on its outer circumference,

  interior, a cylindrical radial stem;

  e.2) the cylindrical rod engages in a control cam

  in the guide tube housing and is slidable therein e.3) the control cam has an element extending in the axial direction of the locking pin

  and an element that extends perpendicular to the element

previously;

  (e.4) the lock bolt has a branch

  made in the form of a handle; (f) under the effect of the rotation of the locking bolt, the

  cylindrical rod can be disengaged from the perpendicular element

eyepiece of the control cam;

  (g) under the effect of an axial displacement of the bolt bolt

  lage, the latter can be disengaged from the two holes located reciprocally vis-a-vis and formed in the plates

of support.

  According to another characteristic of the invention, the connection, on the container side, between the folding closure device and the container is carried out via

  a loose flange, which is attached to the container by the

  intermediate connecting members screwed on its periphery. According to another characteristic of the invention, the connection, on the container side, between the folding closure device and the container is carried out by means of a pipe fixed by welding and extending radially.

in the container.

  All indications and characteristics

  in the present application, and in particular the spatial arrangement shown in the drawings, are considered as

  being essential for the invention, insofar as

  its individually or in combination, they are new

  compared to the state of the art.

  Other features and benefits of the

  present invention will emerge from the description given above.

  after, taken in reference to the accompanying drawings, in which:

  FIG. 1 is a sectional view taken

  1-I of FIG. 2, a cover on the equel shows two devices with different flanges; - Figure 2 shows a plan view of the embodiment of Figure 1, in the direction of the arrow II in this figure; - Figure 3 shows a side elevational view of the foldable closure device of Figure 1, when the lid is closed;

  FIG. 4 represents a plan view of

  the device of FIG. 3; - Figure 5 shows an elevational view

  side of the folding closure device when the cou-

  v is partially open (safety position);

  - Figure 6 shows a plan view par-

  the device of FIG. 5; - Figure 7 shows a side elevational view of the foldable closure device, when the safety device is unlocked and the lid is being opened; FIG. 8 represents an elevation view

  side of the folding closure device when the cou-

vircle is open;

  FIG. 9 represents a variant of embodiment

  of the device of Figure 1, comprising a coupling

  a torospheric bottom flange placed against a peripheral sealing ring in accordance with section line IX-IX of FIG. 10; and FIG. 10 is a plan view of the

cover of Figure 9.

  The lid is fixed by screwing, at the level of the flange 1, with bolts not shown in detail extending in the bores 23, to a container not shown in detail, this container having a corresponding opening which, in the embodiment shown in the upper part of FIGS. 1 and 2 is

  covered by the cover 3 and the peripheral flange.

  Two support plates 7, which are dis-

  placed opposite one another at a distance from

  and have identical shapes, are fixed

  via welding beads 24 on the flange

Rectangle 1 of the lid 3.

  In the two support plates 7, are formed aligned holes and located vis-à-vis, through which an axis 10 which is blocked, against any axial displacement, by a

  washer 16 and a cotter pin 17. The same system of

  xation, formed of a washer 16 and a cotter pin 17, is also installed on the outer face of the plate

opposite support.

  The lid itself is fixed permanently by welding to a support 4, which is welded on the upper face

  of the cover and which forms the support member for covering the

  key. An axle 10, which is connected to the support plates 8 by a cotter pin safety device 16.17

  so as to form a pivot bearing for covering

  cle 3, engages in a face of said support member. The

  support plates 8 are welded to the flange 1 which is

  linked to the container by means of fixing means

  not shown in detail.

  In the representation of FIG.

  this bottom of the flange 1 is fixed by welding a pipe 2 which is itself fixed by welding in the container. In addition, an O-ring seal, which, depending on the purpose of use, consists of different

  materials, such as the material known as

  The "Viton" or the FPM / Perbunan material is inserted into a groove machined in turn in the lid 3.

  The seal is connected to the cover

  cle 3 and forms a sealing seat, either with the inte-

  flange 1 in accordance with the upper part of

  the representation of FIG. 1, with the interior face

  of the weldable tubing 2 in accordance with

  lower part of the representation of Figure 1.

  The closing mechanism of the lid 3 is constituted in the following manner: a lever 5 is mounted so that it can be tilted by means of the axis 10, in the support plates 7 arranged in front of the other. The lever has, in the middle of the axis

  a control cam 25 which constitutes

  killed by a centered element 25a and a con-

  notched cellar 25b, the inner part of which is closer

  radially from the axis 10 that the centered parts of the

25a.

  The lever 5 further comprises a bore 27 which passes through a locking pin 9 which is located above the support 4. The locking pin 9 has a bent shape and has a branch 9a directed upwards. In FIGS. 1 and 2, the compressive force acting on the cover 3 via the support 4 is distributed over

  the lower axis 10 and the locking pin 9.

  Furthermore, the locking pin 9 carries a cylindrical rod 15 which, in accordance with FIG.

  2, protrudes upwards and engages in a cam

  28, which is formed in a guide tube 12, fixed by welding, at one end, to the plate of

left support 7.

  In the lever 5, is formed a recess

  29, in the vicinity of which a pawl 6 is mounted so as to

  see switch. The pawl 6 is in the form of a lever with two arms, and a support cleat 30 is arranged

on the tilting rear part.

  The journalling of the pawl 6 is made at a calibrated screw 14 with hexagon socket, which is fixed

on the lever 5.

  The pawl 6 is loaded, in the direction of the arrow 26, by a branch spring 18, which preloads the pawl in the direction shown by the arrow, so that the head 31 of the pawl is applied by its lower front edge against a surface associated abutment 32 of the plate

of support 7.

  In the upper part of Figure 2, it is also shown that a handle 11, for tilting the lid 3 up, is mounted on

the support 4.

  To open the lid, it is necessary

  to perform the following operations, with reference to the

gures 3 to 8.

  The user of the flap closure device

  table is located above the support plate 7.

  Firstly according to Figures 2 to 4,

  he manually grasps the branch 9a of the bolt bolt

  9 and pulls the latter in the direction of the arrow 34 34, so that the cylindrical rod 15 emerges from the element,

  which is vertical in FIG. 2, of the control cam 28.

  The cylindrical rod 15 is then located in

  the position shown in Figure 2, namely on the

  horizontal direction of the control cam 28; under the influence of

  the further movement of the branch 9a of the bolt stud

  rust 9, the latter moves outwards in the di-

  arrow 33, so that the side, which is at the opposite

  placed on the branch 9a, the locking pin 9 is disengaged

lever 5 (FIG. 6).

  With the right hand, the user then grasps

  lever 5 and tilts it upwards in the direction

  arrow 26 (Figure 5). The tilt angle of the

lever 5 can be equal to 45.

  During the tilting movement of the lever 5 in the direction of the arrow 26, the pawl 6, which is

  loaded by a spring, slides, by its head 31 and by the sur-

  associated abutment face, on the abutment facing surface 32 of the support plate 7 and slides in the direction of

  arrow 35 upward until the head 31 of the

  to hit a stopper 36 of the support plate

port 7 (Figure 5).

  A control pin 37 is rigidly connected to the support 4. In another embodiment, this control pin 37 may be welded, in accordance with FIG. 9, to a peripheral ring 49 of the lid or may be

  formed in one piece with the support. In the closed position

  shown in FIGS. 1 and 3, the control pin

  37 engages the concave element 25b of the control cam

of 25 of the lever 5.

  During the tilting motion in the

  direction of the arrow 36, the centered element 25a slides on the er-

  37 and thus raises the support 4 provided with the lid 3 in the direction of the arrow 38, which releases, in accordance with FIG. 5, a reduced slot between

  the seal ring 13 and the associated recess

  in flange 1 or 2. At the same time, the semi-circular recess

  41 (Figure 8), formed in the tilting portion of the

  5, disengages from the locking pin 9.

  Residual pressure still remaining

  in the container is evacuated by this annular slot.

  and the cover is blocked against any sudden

  that since the head 31 of the pawl 6 is

  Gently, under the action of the spring, against the thrust nose 36. Once the user grasps the handle 11 by his left hand, he can actuate, with this hand, the support cleat 30 of the pawl 6, so that the latter tilts in the direction of the arrow 39 against the force of the spring branches 18 and that the head 31 of the ratchet

  is released from the stopper 36 (Figure 7).

  We can then continue to rotate the

  5 in the direction of the arrow 26, for example to bring it into the 90 position, in which case the pin 37 has already been disengaged from the control cam 25 for a long time, and

  you can tilt the lid completely into its po-

  open, only by lifting the handle 11 (FIG.

re 8).

  In accordance with Figures 2 and 10, he is

  it is intended to optionally mount a closure cap 21, provided with a seal 22, in the surface of the lid 3 and to be able to access the underlying sleeve

  after removal of the closure cap, in order to

  screw off a pressure gauge, a degassing valve or

similar elements.

  Figures 9 and 10 show a form of

  a lid 3 represented as

  with a torospheric background 48. On one side of the

  Figure 1 and on one side of Figure 2, the

  lid 3 with a crazy peripheral flange

  1, while on the other side of Figure 1 and on the

  side of Figure 2, there is shown the flange provided with a pipe 2 fixed by welding. In accordance with FIGS. 9 and 4, the bottom 48, acting as a cover, is welded in a peripheral ring 49, in which case retaining tabs and the control pin 37 are fixed directly.

by welding on this ring.

  The handle 11 serving to open the torosphere bottom

  48 is fixed by welding on the ring 49 of the cover.

  The representation given in the figures shows a cover designated under the symbol VD-1700 and for which the

  nominal pressure is set to PN 16.

  The lid provided with the foldable closing device shown, according to the invention, is realized

  austenitic steel (V2A, V4A, etc.).

Claims (10)

  1. Folding closure device for a lid (3), which is pivotally mounted on   a portion (1,2) of a container, and in which, on the   free swinging of the lid (3), is fixed a control pin (37) which, when the lid (3) is in   its closed position engages in a control cam   (25) and is blocked therein, and wherein the control cam   (25) is mounted on the pivoting part of a lever (5) which is pivotably mounted on the container and is provided at its lower face with a recess (41) which closed position, engages over a locking pin (9) mounted on the cover (3),   this locking bolt (9) can be released from the recess   (41) of the lever (5), under the effect of an axial displacement,   characterized in that it is intended, as a security   against a sudden unexpected rise of the cover (3) in the case of the presence of a residual pressure in the   container, a safety device with the characteristics following measures:   a) a pawl (6) is rotatably mounted on the latch portion   lever lever (5); b) the pawl (6) is in the form of a lever with two arms; b.1) one end of the pawl (6) has a support cleat (30), b.2) the other end of the pawl (6) has a bent head (31);   (b.2.1) the ratchet head (31) applies, in the   closed position, on an abutment surface (32) secured to the container, b.2. 2) the head (31) of the pawl strikes, in the open position, a thrust nose (36)   which limits the abutment surface (32) and is   lid of the container, b.2.3) the head (31) of the pawl is applied against the abutment surface (32), under the action of the   load of a spring (spring branches 18).   Folding closure device according to claim 1, characterized in that the stop surface   (32) has a beveled partial surface (46) on which   the head (31) of the pawl is applied, when the lever (5) is in the closed position, and the partial surface (46) is extended by a horizontal partial surface (47),   on the end of which is located the nozzle of bu- (36).   Folding closing device according to claim 1, characterized in that the spring-loaded pawl (6) is in the form of a lever with a lever, on the free tilting part of which is disposed the support cleat (30).   4. Folding closure device according to   any of claims 1 to 3, characterized in that   that the pawl (6) is arranged in a recess (29) of lever (5).   5. Folding closure device according to   any of claims 1 to 4, characterized in that   that the abutment surface (32Y has its abutment nose (36) located on the upper face of a support plate (7) which   form, in connection with a support plate (7) located at   of the first and with an axis (10), the pivot bearing cover (3).   Foldable closing device according to claim 5, characterized in that the support plates   (7) are used to mount a safety device of the   cover, which shows the characteristics of the following questions:   (c) in each support plate (7) there shall be provided   the hole (27) which is aligned with the bore (27) in the other support plate (7) d) on the front side of the outer face of a support plate (7) is guide (12), whose inner surface is located in the axial extension of the holes (27); e) in the guide tube (12) and in the bores (27), engage an axially displaceable locking pin (9),   e.1) the locking bolt bears, on its outer circumference,   interior, a cylindrical radial rod (15); e.2) the cylindrical rod (15) engages in a cam of   control (28) in the casing of the guide tube dage (12) and can slide therein;   e.3) the control cam (28) comprises an element extending   in the axial direction of the bolt bolt   (9) and an element extending perpendicular-   to the previous element; e.4) the locking bolt (9) comprises a bent limb (9a), in the form of a handle; f) under the effect of the rotation of the locking pin (9), the cylindrical rod (15) can be disengaged from the perpendicular element of the control cam (28);   (g) under the effect of an axial displacement of the bolt bolt   lage (9), the latter can be disengaged from the two bores (27) located reciprocally opposite each other and arranged in the support plates (7).   7. Folding closure device according to   any of claims 1 to 6, characterized in that   the connection, on the container side, between the closing device   the container is made by means of   of an idle flange (1), which is fixed to the container by means of distributed screw connection members on its periphery.   8. Folding closure device according to   any of claims 1 to 6, characterized in that   the connection, on the container side, between the closing device   the container is made by means of   of a pipe (2) fixed by welding and extending dialement in the container.   9. Folding closure device according to   one of the claims 7 or 8, characterized in that   vercle (3) is formed as a torospheric bottom (48) fixed by welding in a peripheral ring (49) of the cover. 10. Folding closure device according to   claim 9, characterized in that retaining lugs   (50) and the control pins (37) are   by welding on the peripheral ring (49) of the neck vercle.