DE2748187A1 - Safety valve plate fixture - has circlip in plate boss snapping into recess in spindle end - Google Patents

Abstract

The valve plate fixing device is particularly for safety valves. The plate has a tubular boss in which the valve spindle fits detachably, to allow a small amount of pivoting in all directions. The boss (13) on the valve plate (5) has a circlip (19) fitting in a groove, while the insertion end (14) of the spindle (12) has at the level of the circlip a recess (20), with which the circlip snaps into engagement. The circlip can be of round section, fitting in a sharp-edged groove of rectangular section in the boss.

Description

BOPPft REUTHER GMBH MANNHEIM WAIDHOF _ £ - 25 October 1977 MTlNTtirilLUNt

Ju / ci
1247

Valve plate mounting

The invention relates to a valve plate mount for valves, in particular safety valves, in which the valve disk has a pipe socket in which the herein submerged valve stem while maintaining a minor one all-round articulation is releasably attached, the valve spindle with its spherical spindle tip on the funnel-shaped, central abutment at the bottom of the pipe socket supports.

A valve disk fastening is known in which a retaining pin, which is seated tightly in the valve spindle, engages in bores in the pipe extension of the valve disk that are larger than the diameter of the retaining pin. Such a retaining pin can, however, become loose and either jam in the valve disk guide or even fall out completely. In the case of valve disks with a lifting bell arranged at a distance therefrom , such a retaining pin can hardly be inserted.

You also have the plunging end of the valve spindle with an outwardly protruding short threaded section provided and attached the corresponding mating thread only in the upper part of the pipe socket of the valve disk, so that the spindle is easily articulated after screwing through this threaded section in the widened end of the pipe socket was held. The dismantling of the valve disc must be done by screwing back the valve spindle from the pipe socket, difficulties arise from the fact that the thread end by the blows occurring when opening the valve may be deformed.

909818/023 $

A valve disk fastening is also known in which the valve spindle is inserted into a tight groove Seeger locking ring is provided. However, you had to insert the valve spindle with the retaining ring attached the pipe socket of the valve disk can be designed in two parts, the threaded retaining piece after the valve spindle has been inserted screwed in. Such a valve disk attachment is complex and expensive to manufacture. In addition, a lot of time is required for assembly and disassembly.

The object of the invention is to avoid the disadvantages of the known valve disk mountings, i. H. one easy The valve disk fastening that is to be manufactured and that quickly connects the valve spindle to the valve disk and is also quickly detachable to accomplish.

This object is achieved according to the invention in that the pipe attachment of the valve disk is inserted into a groove Spring snap ring is provided and the immersing end of the valve spindle at the level of the spring snap ring is an indentation for Has lock-like engagement of the spring snap ring.

With this valve disk fastening, the valve spindle only needs to be inserted into the pipe socket of the valve disk in a simple manner to be pressed in by hand, the spring snap ring initially being elastically expanded by the valve spindle tip and when the spindle position is reached, it jumps back into the indentation of the valve spindle and thus automatically · creates a snap connection. This valve disk fastening can also be easily loosened again just by that the valve spindle is pulled out of the pipe socket of the valve disk, the tensile force on the valve spindle only needs to be so large that the pretensioning force of the spring snap ring is overcome.

The groove provided for the reception of the spring snap ring, which is round in cross section, is expediently in the tube attachment the valve disk has a sharp-edged rectangular cross-section,

909818/0236

whereby the spring snap ring on the one hand easily enters the indentation the valve spindle can snap in and on the other hand is held securely in the groove of the pipe socket of the valve disk and cannot slip out of there.

It is also proposed to provide the indentation of the valve spindle with a curved or beveled inlet section or to design it in the shape of an arc of a circle so that the spring snap ring can easily be inserted into the indentation when the valve disk is installed elnsohnappen and safely slide out again during dismantling can.

It is also proposed that the cross-sectional diameter of the Spring circlip should be selected to be about · smaller than the sum of the groove depth and the play between the tube attachment of the valve disk and the valve stem. As a result, the spring snap ring can be elastically widened so far during the assembly or disassembly of the valve disk that the valve spindle is still just in the Push in or pull out the pipe socket of the valve disc.

It is also proposed that the tensioning force of the spring snap ring should be dimensioned so that it occurs when the valve disk is lifted off from the valve seat, the weight of the valve disk and any adhesive forces that may be present when the valve disk adheres overcomes at the valve seat without widening. This ensures, on the one hand, that the valve disk is securely fastened on the other hand, the forces required for expanding the spring snap ring when pushing in or pulling out the Valve spindle are kept low so that the snap lock can be operated relatively easily.

Exemplary embodiments of the invention are shown in the drawing explained in more detail. Show it:

Fig. 1 shows a safety valve with the inventive Valve disk fastening in longitudinal section,

Fig. 2 shows the valve disk attachment on an enlarged scale in longitudinal section and

903818/0236

27A8187

Pig. 3 another exemplary embodiment of the valve disk attachment on an enlarged scale in longitudinal section.

The safety valve 1 shown in Fig. 1 has a Inlet port 2 and an outlet port 3 and in between the valve seat 4, which is closed by the valve disk 5. The required valve closing pressure is provided by the valve spring 6 applied, which is supported on the upper spring plate 7 on the valve housing 8 and its spring force on the lower Spring plate 9 as well as the guide socket Io and the lifting bell 11 to the valve spindle 12 and thus to the valve disk 5. The valve disk 5 is releasably attached to the valve spindle 12 and has a pipe socket 13 »in the for this purpose the valve spindle 12 is inserted with its immersion end 14. At the end of the valve spindle 12 there is a spherical spindle tip 15 provided, over which the valve spindle on the funnel-shaped, central abutment 16 at the bottom of the pipe socket 13 of the valve disk 5 supports. The valve disk 5 is over the valve disk fastening 17 attached to the valve spindle 12, with a slight flexibility on all sides due to corresponding play is maintained so that the valve plate 5 can always sit fully and thus tightly on the valve seat 4.

As shown in FIGS. 2 and 3, the valve disk attachment 17 formed by a groove l8 provided in the pipe socket 13 of the valve disk 5, into which a spring snap ring 19 is inserted. The immersion end 14 of the valve spindle 12 has, at the level of the spring snap ring 19, an indentation 2o into which the spring snap ring 19 can snap into place when the valve spindle 12 is pushed in, as with a snap lock, whereby the connection is made between the valve disk 5 and the valve spindle 12. The spring snap ring 19 is round uid in cross section on one Slotted point of its circumference. DieJLm pipe socket 13 of the valve disk 5 provided groove l8 has a sharp-edged rectangular cross-section and the spring snap ring 19 inserted therein is held securely in the groove.

909818/0236

In the exemplary embodiment according to Flg. 2 has the indentation

20 of the valve spindle 12 has a beveled inlet section

21, whereby the spring snap ring 19 easily enters the indentation 2o of the valve spindle during the assembly of the valve disk 5

12 can snap into place. When dismantling the valve disc 5 this beveled inlet section 21 forms a wedge sliding surface on which the spring snap ring rests when it is pulled out the spindle can spread easily. The transverse center diameter of the spring snap ring 19 is here somewhat smaller than the sum of the groove depth T and the play S between the pipe attachment

13 of the valve disk 5 and the valve spindle 12.

In the embodiment according to FIG. 3, the indentation is 2o of the valve spindle 12 is designed as a circular arc-shaped recess, which also hler the locking of the spring snap ring 19 is facilitated during assembly and its expansion during disassembly.

909818/023 «

Claims (2)

BOPPtREUTHER GMBH MANNHEIM-WALDHOF 23 October 1977 MTINTAITIILUN " Ju / oi 1247 Claims Valve divider fastening for valves, in particular safety valves, in which the valve disk has a pipe attachment has, in which the valve stem immersed therein under Maintaining a slight flexibility on all sides is, releasably attached with the valve spindle with its spherical spindle tip on the funnel-shaped, centric Supports abutment at the bottom of the pipe socket, thereby characterized in that the pipe socket (13) of the The valve disk (5) is provided with a spring snap ring (19) inserted in a groove (18) and the immersion end (14) of the valve spindle (12) at the level of the Pedersprengringes (19) an indentation (2o) to the snap-lock-like Has latching of the Pedersprengringes (19). 2. Valve head »rbefe« production according to claim 1, since you can c h characterized in that the spring snap ring (19) is provided for receiving the spring snap ring (19), which is round in cross section Groove (18) in the pipe socket (13) of the valve disc (5) has a sharp-edged rectangular cross-section. J>. Valve plate fastening according to claims 1 and 2, characterized in that the indentation (2o) of the valve spindle (12) is curved or has beveled inlet section (21) or Is formed in the shape of a circular arc. 909818/0291 Valve disk fastening according to claims 1 to J>, characterized in that the cross-sectional diameter of the spring snap ring (19) is slightly smaller than the sum of the groove depth (T) and the play (S) between the pipe socket (13) of the valve disk (5) and the valve spindle (12). Valve disk fastening according to Claims 1 to 4, d a characterized in that the clamping force of the spring snap ring (19) is dimensioned so that it takes its own weight when the valve plate (5) is lifted off the valve seat (4) of the valve disk and any adhesive forces that may be present when the valve disk (5) adheres to the valve seat (4) overcomes without widening. 909818/0236