CH151016A - Improved valve for piping. - Google Patents

Description

Perfectionk purlin for piping. The present invention relates to a valve which can hermetically close a pipeline and which performs a movement at least at the end of closing and at the beginning of opening.

For this purpose, the improved valve comprises two parts, one of which, fixed, is clamped to the pipe to be controlled and serves as a guide for the mobile part, which consists of a rising or falling shutter disc. quickly, on a threaded rod with a large pitch, when this latter is rotated, at the end of which is screwed a second rod which, made integral with the obturating disc in due time, causes the descent to be completed slowly and Slowly begins the ascent of this disk by means of a thread ä, reduced pitch provided in the first rod.

The control rod and 1'krou can be threaded pitch, but, on the rod, 1'e.lement in relief being smaller than the hollow, while the opposite takes place on the nut. The obturator disc which must be screwed onto these two Parts can then comprise two zones 6 each pushing the corresponding screw shape. In the appended drawings, given by way of example, an embodiment of the invention is shown.

fig. 1 is a longitudinal section of the valve; fig. 2 is a cross-section thereof; fig. 3 shows on the left a plan view and on the right a horizontal section of this valve.

The valve thus represented has two parts, one fixed and the other mobile. The fixed part is made by a piece 1 flanged or mounted by any other means on the piping to be ordered; this pike has a chamber 1′ open at its upper part and bearing on each of its two side faces a vertical groove 2 serving as a guide for an obturator disk.

This chamber 1' is covered by a dome 3 which is fixed to it by bolts or the like and presenting at its upper part a vertical hole 5 through which passes a control rod 6 passing through a stuffing box 9 and held in place by a shoulder B.

The movable part of the valve comprises a first stem 6 terminated at. its upper end by a wheel 7 and presenting at its lower part two threads of screws, one male 10 with a very rapid pitch cut so that the element in relief is half the hollow; the other 11, female, with a very reduced pitch, practiced at the bottom of an internal channel opening by an orifice 20 and which Over a certain height is smooth so as to prevent the inadvertent rise of any liquid.

Into this female thread 11 is screwed the upper part of a second rod 12 having towards half its height two smooth parts 21 and 22, the top part being able to enter inside the orifice 20, while say that the bottom gel has the same diameter as the web of the rod 6.

This last part of the rod 12 comprises a thread 1.3 having the same diameter, the same axis and the same pitch as the first thread 10 of the rod 6, but cut in such a way that the element in relief is twice the hollow.

In addition, this fillet presents in its full part two Grans 24 having the role of rendering at a given moment the rod 12 integral with the shutter disc.

This obturator disk comprises three parts, a central 14 called lens and two lateral 15 called lids.

The lens 14 is pierced with four openings 16, 16' whose surfaces are spherical and concentric in shape, it is further traversed along its vertical diameter by a female screw thread matching the shape of the rod 12 and having two notches 26 corresponding to the Grans 24 of the latter.

The female screw thread of the lens 14 is surmounted by a cylindrical portion 27 slightly higher than the smooth part 22 which can receive.

A head 28 is, on the other hand, arranged above this cylindrical portion and is traversed by a female thread corresponding to that of the first rod 6, while the rest of the lens is adapted alone. - ment to the thread of the second stem.

The caps 15 which complete the shutter disc are provided towards the inside with steps 17 with a spherical surface, some engaging in openings 16, the others being applied to the extreme surface of the lens. 14 which is thus exactly nested.

This lens finally comprises two tenons 18 and 18 'which slide Jans the slides 2 and guide RTI ID="0002.0275" WI="3" HE="4" LX="1377" LY="703"> 1st movement of the disc closes - as a whole.

The operation of the valve thus rl6- erit is the following: When the steering wheel of the control 7 is turned in the first suitable direction, the lens 14 held by its tenons 18 and 18 'cannot turn. whole descends rapidly under the action of the thread 10 on the screw thread of the unit 28. The lens 14 thus descends both on the rod 10 and on the rod 12, the thread of which is placed in the extension, up to the when the head 28 abuts on the first thread 1 3 of the rod 12.

At this instant, the lens 14 becomes integral with the rod 12 and, thanks to the engagement of the Grans 24 and 26, the assembly deseen.d then, without the influence of the female thread 11, is not reduced. The closing of the valve is thus completed slowly.

When one wishes to open the valve, an turns the wheel in the opposite direction; it is the first fillet 11 which begins at. be attacked and it thus recalls the stem 12 and the obturator until the moment when this stem is at the end of its travel. From this moment, the lens 14 rises rapidly On the first thread 13 of the rod 1.2, then On the first thread 10 of the rod 6 .de faVon r1 complete the opening of the valve.

Claims (1)

CLAIM Z year improved able to hermetically close a pipe and performing a slow movement at the end of the closing and at the start of the opening, characterized in that it comprises two parts, one of which, fixed, is flanged on the conduct to order and serves as a guide to. the movable part, which consists of an obturator disc rising or descending rapidly on a threaded rod with a brand pitch, when the latter is rotated, at the end of which is screwed a second rod which , made integral with the obturator disc in due time, causes the descent to end slowly and the ascent of this disc to begin slowly by means of a thread ä, not reduced provided in the first stem. SUB-CLAIMS 1 Valve according to claim, characterized in that it comprises a first control rod held rotatably in the fixed part, terminated at its lower end by a male thread of pitch and by a thread female with reduced pitch in which a second rod is wisse also carrying a male thread with Brand pitch extending that traced on the First rod; oe kaut threading engages Jans a central lens of the shutter clisk comprising two caps mounted by spherical joints on either side of the lens. Valve according to sub-claim 1, in which the first stem screw thread with brand pitch having a relief element smaller than the depression, the opposite being made on the first pitch screw thread of the second stem, the lens comprising at its upper part a threaded head suitable only for the thread of the First rod, while the rest of the lens is suitable only for the thread of the second rod.