REMOVABLE FIXING DEVICE

Abstract

The present invention relates to a removable fixing device 1 for fixing equipment A on a support B, with: a compressible planar piece 5, an operating lever comprising a cam lever 2, and an assembly rod 3 having a first end and a second end;

with: said second end of the assembly rod 3 being provided with a tightening means (4); said compressible planar piece 5, said operating lever comprising a cam lever 2 and said tightening means 4 arranged in tightened position being disposed around said assembly rod 3 in an assemblage; said operating lever comprising a cam lever 2 being arranged so that a rotation of the cam lever 2 about an axis y at right angles to the axis z of the assembly rod 3 induces a displacement of the cam lever 2 between a tightened position and a loosened position.

Claims

1. Removable fixing device (1) for fixing equipment (A) on a support (B), the assembly comprising said equipment and said support being able to be disposed in an enclosure, such that said support (B) comprises a planar part which extends in a plane (P) and which is at the interface with a complementary planar part belonging to said equipment (A), such that said device comprises: a compressible planar piece (5); an operating lever comprising a cam lever (2); and an assembly rod (3) along an axis (z) having a first end linked mechanically to said planar part of the support (B) and a second end; and such that the device is characterized in that: said second end of the assembly rod (3) is provided with a tightening means (4) capable of being arranged in tightened position; said compressible planar piece (5), said operating lever comprising a cam lever (2) and said tightening means (4) arranged in tightened position are successively disposed parallel to the plane (P) around said assembly rod (3) in an assemblage; said operating lever comprising a cam lever (2) is arranged so that a rotation of the cam lever (2) about an axis (y) at right angles to the axis (z) of the assembly rod (3) induces a displacement of the cam lever (2) between a tightened position in which the compressible planar piece (5) is compressed and the assemblage is fixed, and a loosened position in which each element of said assemblage is removable.

2. Device according to claim 1, characterized in that said cam lever (2) of the operating lever comprises two parallel identical cams, mounted with rotary link about the axis (y) on a two-branch fork (8), each of the cams being situated on either side of said fork (8) and each of the cams comprising, on its outer surface, a point of contact (M) with an element of the assemblage, said point (M) being displaced on said element and on the outer surface of said cam, during the displacement of the cam lever (2) from the tightened position to the loosened position.

3. Device according to claim 2, characterized in that said two-branch fork (8) has a U or C or omega form or the form of a fork with two teeth.

4. Device according to claim 2, characterized in that the outer surface of each of the cams comprises a first part (10) and a second part (11) such that: when the cam lever (2) is in tightened position, said first part of the outer surface of the cam (10) is in contact with an element of the assemblage at a distance (d) relative to the axis (y) and said first part of the outer surface of the cam compresses the compressible planar piece (5); during the displacement of the cam lever (2) from the tightened position to the loosened position, said second part of the outer surface of the cam (11) is in contact with an element of the assemblage at least one point M which changes in approaching the axis (y); when the cam lever is in the loosened position, the distance (e) between said point (M) and the axis of rotation (y) is chosen so that each element of the assemblage is removable.

5. Device according to claim 4, characterized in that the first part of the outer surface of each of the two parallel cams of said cam lever (2) is rectilinear and the outer planar surface of said cams on the first part is in contact with an element of the assemblage when the cam lever (2) is in tightened position.

6. Device according to claim 4, characterized in that the second part of the outer surface of each of the two parallel cams of said cam lever (2) is curved, preferably of elliptical or polynomial or off-centre circular form.

7. Device according to claim 4, characterized in that the second part of the outer surface of each of the cams is elliptical according to an ellipse of centre O, such that said centre O is advantageously off-centre by a distance (b) relative to the axis (y) of rotation of the cam.

8. Device according to claim 2, characterized in that each of said cams of the cam lever (2) is symmetrical according to a symmetry on a plane (F) at right angles to said cams and comprising the axis of rotation of the cam lever (y).

9. Device according to claim 1, characterized in that the cam lever (2) comprises a manual gripping means or a motorized lever manoeuvring means.

10. Device according to claim 1, characterized in that said tightening means (4) in tightened position is adjustable to adjust the tightening torque on the assembly rod (3) when the operating lever comprising a cam lever (2) is in tightened position.

11. Device according to claim 1, characterized in that the tightening means (4) consists of a nut mounted on a threaded part of the assembly rod (3) in the second end of said rod.

12. Device according to claim 1, characterized in that a washer (7) is arranged in the assemblage between the operating lever comprising a cam lever (2) and the compressible planar piece (5).

13. Assembly comprising equipment (A), a support (B) and the removable fixing device (1) according to claim 1, characterized in that the complementary planar part of said equipment is arranged around the assembly rod parallel to the plane (P) below said operating lever comprising a cam lever (2) and above the planar part of said support (B), preferentially above the compressible planar piece (5).

14. Assembly comprising an enclosure, equipment (A), a support (B) and the removable fixing device (1) according to claim 1, characterized in that said enclosure is chosen from among a reactor, a balloon tank, a distillation column, an extraction column, an absorber, preferentially implementing chemical or physico-chemical reactions in the field of chemistry, petrochemistry, biochemistry or refining.

15. Method for installing the assembly according to claim 13, said method comprising the following steps: positioning the compressible planar piece (5) parallel to the planar part of the support (B) around the assembly rod (3); positioning the complementary planar part of the equipment (A) parallel to the compressible planar piece (5) around the assembly rod (3); positioning the operating lever parallel to the complementary planar part of the equipment (A) around the assembly rod (3); positioning the tightening means (4) arranged in tightened position parallel to the operating lever comprising a cam lever (2) around the assembly rod (3); optionally positioning a washer (7) between the operating lever comprising a cam lever (2), such that said washer (7) is placed around the assembly rod (3) above the complementary planar part of the equipment (A); rotating the cam lever of the operating lever (2) about the axis (y) at right angles to the axis (z) of the assembly rod (3) in order to displace said cam lever between a loosened position in which each element positioned previously is removable and a tightened position in which the compressible planar piece (5) is compressed and each element is fixed; optionally adjusting the tightening torque by acting on the tightening means (4).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0099] FIG. 1a represents a side view of the assembly comprising a removable fixing device (1) according to a first variant of the invention, of a planar part of a reactor internal (A) and of a beam (B).

[0100] FIG. 1b represents a second side view of the assembly represented in FIG. 1a after rotation of the cam lever (2).

[0101] FIG. 1c represents a front view of the assembly represented in Figure la with the cam lever (2) in loosened position.

[0102] FIG. 2a represents a top view of the operating lever comprising a cam lever (2) and a two-branch fork (8) according to a variant of the invention.

[0103] FIG. 2b represents a top view and a side view of a part 9b of the cam lever represented in FIG. 2a.

[0104] FIG. 3 represents a side view of an exemplary embodiment of a removable fixing device 1 according to another variant of the invention for fixing a tray A onto a beam B.

DESCRIPTION OF THE EMBODIMENTS

[0105] The references represented in the figures are itemized below, in relation to the components to which they refer: [0106] AReactor internal of tray type [0107] BBeam [0108] 1Removable fixing device [0109] 2Cam lever [0110] 3Assembly rod [0111] 4Tightening means [0112] 5Compressible planar piece [0113] 6Lateral axis [0114] 7Optional washer [0115] 8Two-branch fork [0116] 9a and 9bParts of the cam lever [0117] 10First part of the outer surface of a cam [0118] 11Second part of the outer surface of a cam [0119] 12Cutout in the internal of tray type

[0120] FIG. 1a represents a side view of the assembly comprising a removable fixing device 1 according to a first variant of the invention, for a planar part of a reactor internal of tray type A and a beam B, said device being intended to fix the planar part of the reactor internal of tray type A onto said beam B. Said internal is planar in the zone where the device is installed. The device 1 is represented with an operating lever comprising a cam lever 2 mounted on a two-branch fork 8. The removable fixing device 1 comprises an operating lever comprising a cam lever 2, an assembly rod 3, a tightening means composed of a nut mounted on a threaded part of the assembly rod 4 arranged in tightened position, a compressible planar piece 5 and an optional washer 7 in the form of a U. The reactor internal of tray type A is disposed between the compressible planar piece 5 and the cam lever 2, with an optional washer 7 between the latter two elements. The removable fixing device 1 is represented with the cam lever in tightened position: the first part of the outer surface of the cam 10 is rectilinear and is in contact with the washer 7 at a distance d relative to the axis y. In this position, the compressible planar piece 5 is compressed between the tray A and the beam B and the assembly is held fixed. The tray A comprises a cutout 12 through which the assembly rod 3 passes. Said cutout is of a section greater than the section of the bolt of the tightening means 4.

[0121] FIG. 1b represents a second side view of the assembly represented in FIG. 1a after rotation of the cam lever 2 about the axis y from the tightened position to an intermediate position in which the cam lever 2 forms an angle a less than 90 degrees with the axis z of the assembly rod 3, all the other elements of the device being immobile. The manoeuvre of the lever is effected without loosening the tightening means 4. In the intermediate position of the lever, the second part of the outer surface of each of the two cams 11 is in contact with the washer 7 at a point M which moves on the surface of the washer 7 and on the surface of each of the cams in approaching the axis y as the cam lever 2 approaches the loosened position which corresponds to the position in which the cam lever 2 is parallel to the axis z.

[0122] FIG. 1c represents a front view of the assembly represented in FIGS. 1a and 1b after rotation of the cam lever 2 about the axis y from the intermediate position represented in FIG. 1b to a loosened position in which the cam lever 2 is parallel to the axis z of the assembly rod 3. When the cam lever is in the loosened position, each of the two cams of the cam lever 2 is in contact with the removable washer 7 at a point M. The distance e between said point M and the axis of rotation y is less than the distance d of FIG. 1a. The distance e is advantageously chosen to form a sufficient gap 6 between the top part of the two-branch fork 8 and the bottom part of the tightening means 4 in order for each element of the assembly to be removable. In this position of the cam lever 2, the compressible planar piece 5 is not compressed, the operating lever is removable, as are the tray A, the washer 7 and the compressible planar piece 5.

[0123] FIG. 2a represents a top view of the operating lever comprising a cam lever 2 and a two-branch fork 8 according to a variant of the invention. Said two-branch fork 8 is in the form of a U, provided with an axis 6 on each of the lateral faces. Said axes allow the cam lever 2 to be mounted on the two-branch fork 8 with rotary link about the axis y. Said cam lever 2 is manufactured by joining two symmetrical parts to one another 9a and 9b and by welding them at one of their ends so as to form a handle. The other end of each part is composed of a cam. The two cams are spaced apart by a distance L.

[0124] FIG. 2b represents a top view and a side view of the part 9b of the cam lever 2 represented in FIG. 2a. In this variant, the part 9b of the cam lever is symmetrical relative to the plane P. P is the plane at right angles to the part 9b which comprises the axis of rotation of the cam lever y. The outer surface of the cam comprises a first rectilinear part 10 and a second elliptical part 11, according to an ellipse of centre O. The distance a is chosen for a sufficient gap between the top of the cam lever and the bottom part of the tightening means to be created when the cam lever is in loosened position. The centre O of the ellipse is off-centre by a distance b relative to the point C through which the axis of rotation of the lever y passes.

[0125] FIG. 3 represents a side view of an exemplary embodiment of a device for fixing a tray A onto a beam B in another variant of the invention. The removable fixing device 1 is manufactured in stainless steel SS321 like the tray A and the beam B. The device is used for a tray A with a thickness typically of between 6 and 20 mm. An assembly rod 3 with a diameter of 16 mm is welded onto the beam B at the location intended to receive the fixing device 1. The removable fixing device 1 comprises: [0126] a threaded rod 3 with a diameter of 16 mm, [0127] a nut 4 with a diameter corresponding to that of the threaded rod 3, [0128] a glass fibre seal 5 with a thickness of 3 mm, capable of being compressed, [0129] a removable washer 7 made of stainless steel with a thickness of 5 mm and in the form of a U, [0130] and an operating lever composed of a cam lever 2 comprising two identical and parallel cams mounted laterally on the two sides of a two-branch fork 8. The two-branch fork 8 has a height h of 20 mm, a width of 50 mm and a length of 50 mm. Each cam of the cam lever has a width W of 50 mm.

[0131] To install the device 1 of FIG. 3 and the tray A in the enclosure provided with the beam B onto which the end of the threaded rod 3 is welded, the operator typically proceeds as follows: [0132] he or she places the glass fibre seal 5 on the support B such that the threaded rod 3 passes through it, [0133] then, he or she positions the tray A such that the threaded rod 3 passes through the planar part of the tray A intended to be at the interface with the beam B, [0134] then, he or she places the two-branch fork 8 around the threaded rod 3, the cam lever 2 being in loosened position, that is to say along the axis z at right angles to the plane P, [0135] next, the operator moves the cam lever 2 to tightened position, that is to say with the cam lever 2 parallel to the plane P, [0136] then, if it is not yet installed, the operator screws on the nut 4, [0137] the operator can then optionally adjust the tightening torque.

[0138] When the cam lever 2 is in tightened position, the first part 10 of the outer surface of each of the cams of the cam lever 2 is in contact with the tray A over a length of 20 mm. The glass fibre seal 5 is therefore compressed between the tray A and the beam B. The tray A is fixed as are all the elements of the removable fixing device 1.

[0139] To remove the device 1 of FIG. 3 and the tray A from the enclosure, the operator typically proceeds as follows: [0140] the operator moves the cam lever 2 from the tightened position to the loosened position, that is to say from the position in which the cam lever 2 is parallel to the plane P to the position in which the cam lever is at right angles to the plane P, [0141] then the operator removes the operating lever composed of the two-branch fork 8 and the cam lever 2, [0142] then, he or she removes the tray A, [0143] then, he or she removes the glass fibre seal 5, [0144] finally, the operator can possibly remove the nut 4.

[0145] In this example, the tray A is provided with an orifice with a section greater than the section of the nut 4.

[0146] In this example, a second part of the outer surface of each of the cams of the cam lever is elliptical, with an ellipse of ratio 2:1. This part makes it possible to loosen the cam lever in a continuous manner and to form a gap between the top part of the two-branch fork 8 and the bottom part of the nut 4, so as to be able to remove the device.

[0147] From all of the variants represented in the figures, it can be seen that the tightening means cooperates with the second end of the assembly rod only: it does not cooperate with the operating lever comprising the cam lever.

[0148] Without further elaboration, it is believed that one skilled in the art can, using the preceding description, utilize the present invention to its fullest extent. The preceding preferred specific embodiments are, therefore, to be construed as merely illustrative, and not limitative of the remainder of the disclosure in any way whatsoever.

[0149] In the foregoing and in the examples, all temperatures are set forth uncorrected in degrees Celsius and, all parts and percentages are by weight, unless otherwise indicated.

[0150] The entire disclosures of all applications, patents and publications, cited herein and of corresponding French application No. 19/03,349, filed Mar. 29, 2019, are incorporated by reference herein.

[0151] The preceding examples can be repeated with similar success by substituting the generically or specifically described reactants and/or operating conditions of this invention for those used in the preceding examples.

[0152] From the foregoing description, one skilled in the art can easily ascertain the essential characteristics of this invention and, without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various usages and conditions.