DE1935085A1 - Extensible ring for valve gate valve and valve gate valve equipped with it - Google Patents

Description

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CENTER DE RECHERCHES DE PONT-A-MOUSSON Maidiöres, 54 Pont-a-Mousson, France

Extensible ring for valve gate and equipped with it Valve gate valve

The invention relates to faucet valve with devices that a translational relative displacement between a Cause closure body and its seat to press them tightly against each other.

The applicant has already described in French patent specification 117 036 of August 7, 1967 (German patent application J. ^ f;? 5 340, S) a valve gate in which the above-mentioned relative displacement by an expandable or expandable means, in particular by a elastic open ring is ensured, the expansion of which is caused by a mechanical expansion device, such as a wedge, a nook, a cylinder arrangement or the like.

A similar training is mentioned in the French patent specification of the same day as the present application.

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written, the title of which is: Sperrhahn mit Hahnküken, the plug of the stopcock being spherical, conical or cylindrical can.

Because of this ring, the relative tension between the closure body and seat over the entire circular circumference of the pressed organ is as regular as possible and this pressure is regulated by actuating a single mechanical organ _f, which makes this easy. The seal is excellent and there is little wear and tear, especially in the case of gate valves or slide valves, where the (wedge) slide does not rub on the seats during movement. Because of this, stopcocks equipped with such rings can be used for all liquid or gaseous media and in particular gases and vapors at very high pressure.

In the aforementioned applications, the ring has a trapezoidal shape Central cross-section, the one with its frustoconical planks with a conjugate surface for the axial relative displacement between a closure body and a seat in the Expansion of the ring cooperates. This trapezoidal cross-section is constant.

According to the invention, an improved ring is now proposed be used as a means of axial relative displacement between a tap closure body and its seat for tight pressing can be used against each other.

This improved expandable or expandable ring of the trapezoidal cross-section and opening type, which accommodates a wedge or other expandable organ, is characterized-in particular by the shape of a body the same Flexural strength, the central cross-section gradually decreasing towards the two ends, starting from a maximum value, the

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is present in the center of the circular perimeter, d. H. at the point diametrically opposite the opening.

Due to this shape of equal strength, the ring deforms, by remaining cylindrical and thus displacing a closure member against its seat or vice versa, being an extreme one Regularity is maintained over the entire circumference without the pressed organ deforming or deforming in the slightest would wedge.

The subject of the invention is also an improved one with such Ring equipped stopcock.

Exemplary embodiments of the invention will now be understood with reference to Figs accompanying drawings are explained in more detail, in which

Fig. 1 is an illustration of an improved ring according to the invention is;

Fig. 2 is a partial section along line 2-2 in Fig. 1}

Fig. 3 is a schematic partial representation in vertical longitudinal section through one with a ring according to the invention equipped faucet valve;

Fig. 4 is a partial view with a section along the. Line 4-4 in Figure 3J

Figure 5 is a fragmentary, enlarged view of the wedges or slide of the Hahans of Fig. 3;

6 is a schematic partial section through a cock plug with "a ring according to the invention;., -.-.

90 98 847.125 5

Pig. 7 is a partial view in section along the line 7-7 in Fig. 6. ""

According to the embodiment shown in Figures 1 and 2 the ring according to the invention consists of a tubular or spring ring 1, which is open towards the opening 2, the opposing surfaces of which form an acute angle χ. This opening can be widened to expand the ring by a mechanical means, for example one shown in dashed lines Expansion or expansion wedge A, a screw, a nooke, a knee joint, a cylinder arrangement, etc.

The ring 1 is trapezoidal in the middle section. In accordance with the invention this middle cut is variable from one end of the ring to the other. He's in the middle} on the other side like that Opening 2 is maximal and gradually decreases towards the ends 3, in the vicinity of which it is minimal. The ring thus forms a body match Flexural strength. The ends 3 are reinforced to widen the wedge A or any other mechanical element to provide two sufficient support surfaces for the opening.

The ring also has an inner annular groove 4, which has only shallow depth and is of trapezoidal profile, on, its flanks converge in the same direction as that of the outer trapezoidal profile. As will be shown below, this trapezoidal groove 4 is intended with cooperate with the wedges or slides of a valve gate valve.

The ring 1 has, for example, a circular inner surface with the center D and a circular ^: 'outer surface with the center Ο.

Thanks to its shape as a body, the same flexural strength remains,

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if bending stress is caused on the ring by spreading the ends 3, the inner and outer surfaces cylindrical.

In Figures 3 to 5, the Hing is shown as it is in a body 5 of the gate valve with two pipe inlet and outlet nozzles 6 is used, the axis X-X of which is perpendicular to the plane of symmetry Y-Y of the body 5 lies. The pipes or pipe sockets 6 have inner seats 7 which are to be closed.

An actuating rod 8, which is equipped at its end with fastening members for the closure member, also has an expansion or expansion wedge A. The closure body has two wedges or slides 9 in the form of discs which are symmetrical about the Y-Y axis. Each slide 9 has (FIG. 4) a cylindrical inner bearing surface 10 on, which is limited transversely by a sloping flank 11 in such a way that the two wedges mounted on the actuating rod 8 or slide 9 cut out a circular groove of trapezoidal profile between them. In addition, according to the invention each cylindrical inner bearing surface 10 has an end bead with a frustoconical flank 12, which in connection with the bearing surface 10 stands up, the frustoconical flank 12 being conjugate to the inner profile 4 of the ring 1.

The cylindrical bearing surfaces 10 of the wedges or slides are thus introduced into the interior of the ring 1, the so in the trapezoidal groove of the slide or wedges 9 is located, while the beads with inclined flanks 12 for the bearing surfaces 10 are mounted in the inner groove 4 of the ring 1.

The mode of operation is as follows: A first tightening of the closure body (wedges or slide 9) against the seats 7 leads

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to a displacement of the actuating rod 8 against the bottom of the body 5. This first clamping is by a Tensioning at the end of the displacement of the actuating rod 8 completed by the expansion wedge A between the ends 3 of the expandable ring 1 is driven. During the expansion movement of the ring 1, the inclined flanks exercise their outer trapezoidal profile on the flanks 11 the trapezoidal groove of the wedges or slide 9 from radial centrifugal forces, the axial components of which are the slide or remove the wedges 9 from one another and push them firmly onto the Press seats 7.

These axial loads become uniform over the entire Circumference of the wedges or slides distributed, provided that the ring 1 deforms by remaining cylindrical. This results in a complete pressing of the slide or wedges 9 onto the seats 7 and thus a rigorous seal.

By opening the gate valve, the operating rod is moved in the opposite direction »at the beginning of this Displacement is the expansion wedge A released from the opening 2 of the ring 1, whereby the wedges or slide 9 the Free the space necessary for their approach. The ring 1 closes elastically and calls by its inner groove 4 the frustoconical planks 12 of the end beads of the bearing surfaces 10 act, the approach of the wedges or slides 9, d. H. Lifting off from the seats 7. This approximation of the Wedges or slides made possible due to the combination of the inner groove 4 of the ring and the beads with frustoconical Planks 12 of the bearing surfaces 10 a disappearance of the slide 9 without friction on the seats 7. It is therefore certain that the surfaces of these seats and the wedges do not run the risk of being damaged by friction or pressing.

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In Figures 6 and 7 of the. In the drawings, the ring 1 in the form of a body with the same flexural strength is applied to a valve with a spherical valve plug. In this case, no trapezoidal internal groove 4 is provided; the inner surface is cylindrical sitting opposite inlet ^I and outlet port 14. Its closure body 15 which is interposed between these pipe sockets is spherical. this closure body 15 is mounted on a rotary shaft 16 from the axis YY perpendicular stored to the axis X-X and has an inner bore 17 of the same diameter as that of the pipe socket 14. With a view to a simplified representation, the cover, the sealing sets and the actuating lever of the closure member 15 have not been shown.

According to this embodiment, the closure body 15 saves a considerable amount of axial space with the pipe socket is occupied by sleeves 18, based on the closure body 15 sit diametrically opposite each other. Each socket 18 serves in a manner known per se as a bearing for a sealing sliding ring 19. An elastic member, for example a Belleville washer 20, is supported in the interior of the sleeve 18 stored against the Abdichtimgsscheibe. A pressure waistband 21 is supported against the Belleville disk 20. This covenant has, in a manner known per se, a frustoconical support surface 22 for an organ with a wedge shape. According to the invention, this organ is expandable by one Ring 23 in the form of a body with the same flexural strength designed with a variable trapezoidal central section. This ring is between the bottom of the sleeve 18 and the compression collar

21 such between se hen ge sehalt et that the trapezoidal outer profile of the annular disk 23 with the frustoconical surface

22 of the pressure collar 21 cooperates. An expansion wedge A becomes

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inserted into the opening of the washer and a screw 24, the end of which is pressed onto the wedge, is screwed radially into the sleeve 18. The screw 24 is through a Cap 25 covered tightly. ■ -,,

Screwing the screw 24 in, each socket 18 gets over the wedge A an expansion of the ring 23 and thus the displacement of the .Druckbundes 21 to the closure organ .15 out. The pressure collar 21 transfers its thrust to the sealing ring washer or the seat 19 by the Belleville washer Is squeezed. This device enables an unconditional uniform pressing of the seat 19 on the closure organ 15, due to the profile of the same strength Washer 23.

Unscrewing the screw 24 provides the contraction the annular disk 23 under the influence of the elastic return of the Belleville spring 20 and for the exit of the Wedges -A ..

The maneuvers of tightening and releasing the sealing ring washer or of the seat 19 and thus their regulation are very simple due to the single screw 24, which after removal of the cover is accessible from the stopcock. Such Regulation makes it possible to rotate the breechblock 15 to be applied actuating torque to a minimum value to lend.

Of course, the invention is not limited to the ones shown and limited embodiments described; Changes and modifications are within the scope of the invention.

Claims *. 909884/1255

Claims (8)

Patent claims: Expandable or expandable washer, which is used as a means of axial relative displacement between a Stopcock closure member and its seat are used, identified by the shape of a body same flexural strength, the middle section progressively towards the two ends (3) of a maximum value decreases present in the center of the circular perimeter, d. H. at the diametrical opening (2) opposite point. 2. Expansible washer according to claim 1, characterized in that the inner surface is cylindrical is. 3. Expansible washer according to claim 2, characterized in that on the cylindrical Inner surface an inner groove (4) with a trapezoidal cross-section is provided. 4. Stopcock, characterized by at least one slide or wedge (9) combined with an expansible one Ring disk according to one of Claims 1 to 3. 5. Stopcock with two wedges or slides, which are separated from each other by means of an expansible washer according to claim 3 can be removed, characterized in that that the wedges or slides (9) are cylindrical Have inner bearing surface (1O) with inclined flank (12), which is conjugate to the inclined flanks of the inner trapezoidal groove (4) of the expandable annular disc (1), with the inside of the Groove two bearing surfaces (10) are accommodated in such a way, 909884/1255 - 10 - that an approach of the wedges or slides (9) during the contraction the washer (1) is possible. 6. Expansible washer, usable as a means of axial relative displacement between a valve body and its seat essentially as described and shown in the drawing. 7. Slide valve essentially as illustrated with reference to Figures 3 to 5 of the drawings. 8. Stopcock plug gate valve essentially as in figure 6 7 and 7 of the drawings. 90988Λ / 1255 , 77 Le e rs e 11e