Abstract
A diaphragm for a diaphragm valve comprises a base body made from an elastomer, the base body having a side facing towards the media and a side facing away from the media. A force transmission component is disposed at the base body on the side facing away from the media for the attachment of a spindle drive for a diaphragm valve. Furthermore, the base body has a reinforcement area, the reinforcement area being disposed on the outside of the base body on the side of the base body facing away from the media.
Claims
1. A diaphragm for a diaphragm valve having a base body made from an elastomer, wherein the base body comprises a side facing towards the media and a side facing away from the media, wherein a force transmission component is disposed at the base body on the side facing away from the media for the attachment of a valve spindle for a diaphragm valve, and wherein the base body furthermore comprises a reinforcement area, wherein, the reinforcement area is disposed on the outside of the base body on the side of the base body facing away from the media.
2. The diaphragm as recited in claim 1, wherein, the reinforcement area is a fabric.
3. The diaphragm as recited in claim 2, wherein, the reinforcement area comprises a warp thread and weft thread system.
4. The diaphragm as recited in claim 1, wherein, the reinforcement area comprises synthetic fibers.
5. The diaphragm as recited in claim 1, wherein, the reinforcement area comprises glass or carbon fiber reinforced plastic material.
6. The diaphragm as recited in claim 1, wherein, the reinforcement area is a reinforcement film.
7. The diaphragm as recited in claim 1, wherein, the base body at least in sections is thicker than the reinforcement area.
8. The diaphragm as recited in claim 1, wherein, an adhesive agent is provided on those surfaces of the force transmission component and/or of the reinforcement area, which form an effective surface pair with the base body.
9. The diaphragm as recited in claim 1, wherein, the base body and/or the reinforcement area comprises a vulcanizable elastomer.
10. A valve having a diaphragm as recited in claim 1.
11. A method for the manufacture of a diaphragm as recited in claim 1, wherein, the base body is vulcanized onto the force transmission component and/or the reinforcement area.
12. The method as recited in claim 10, wherein, the base body has been generated with the aid of calendering before the vulcanization.
13. The method as recited in claim 10, wherein, the force transmission component, the reinforcement area, the base body and additional elastomer are positioned in a forming tool before the vulcanization.
Description
[0035] Subsequently, the present invention is described in greater detail on the basis of an exemplary embodiment illustrated in the drawings.
[0036] FIG. 1 shows schematically a cross-sectional view of a diaphragm according to the present invention;
[0037] FIG. 2 shows an exploded view of a diaphragm according to the present invention and according to the exemplary embodiment of FIG. 1 in a perspective view; and
[0038] FIG. 3 shows a cross-sectional view of a diaphragm valve having a diaphragm according to the present invention, which is split along the center axis, in two embodiments, namely, on the left half of FIG. 3, a diaphragm valve closed by default and, on the right half of FIG. 3, a diaphragm valve open by default.
[0039] FIG. 1 shows a diaphragm 1 having a base body 2 formed in a bell-shaped manner and a reinforcement area 3 mounted on base body 2. The bottom side of diaphragm 1 is side 4 facing towards the media; the upper side of diaphragm 1 is side 5 facing away from the media. On side 5 of diaphragm 1 facing away from the media, a force transmission component 6 is inserted into base body 2 in such a manner that reinforcement area 3 is also in contact with force transmission component 6. Force transmission component 6 serves to move diaphragm 1 towards and away from a valve seat 10 illustrated in FIG. 3, which is located below force transmission component 6. In order to configure the force transmission into diaphragm 1 as smooth as possible, the force transmission component in sections is surrounded by an elastomer extension 7. In this area, the diaphragm 1 has three layers because reinforcement area 3 extends on base body 1 of diaphragm 1 across the total surface on side 5 facing away from the media. As shown in FIG. 1, the diaphragm is however designed substantially in two layers, which is made up of the elastomer layer and the reinforcement layer.
[0040] FIG. 2 illustrates the individual components of diaphragm 1 on the basis of a perspective exploded illustration. In this instance, two-layered diaphragm 1 can be clearly seen on the basis of that base body 2 in an illustrative manner is spatially spaced apart from reinforcement layer 3. Here, force transmission component 6 is shown in an unmounted position. It can however be seen that the shaft of force transmission component 6 is to be inserted through component opening 8 of reinforcement layer 3 in such a manner that a diaphragm 1 as shown in FIG. 1 results.
[0041] FIG. 3 shows a diaphragm valve 9 having a diaphragm 1 installed in diaphragm valve 9 on the basis of a schematic cross-sectional illustration of the complete diaphragm valve 9. On the basis of two diaphragm positions, it is here illustrated, in which way diaphragm 1 fits on valve seat 10 to generate the desired sealing effect on side 4 of diaphragm 1 facing towards the media.
[0042] In the shown illustration, the left side of FIG. 3 illustrates the open position of diaphragm valve 9 and the right side of FIG. 3 illustrates the closed position of diaphragm valve 9. The illustration shows two different embodiments of diaphragm valve 9, namely one being open by default (left) and one being closed by default (right). Diaphragm 1 is switched with the aid of a spindle drive 11, which is located in the interior of valve housing 12. The force flow for switching diaphragm 1 is carried out via a valve spindle 13, which is connected to spindle drive 11 and force transmission component 6. Spindle drive 11 is substantially made up of a pressure spring 14 positioning valve spindle 13 and of a switching chamber 15 applyable by pressurized air. If switching chamber 15 is applied by pressurized air, valve spindle 13 moves against the spring force of pressure spring 14. In the case of the embodiment open by default (left), valve spindle 13 now moves downwards; in the case of the embodiment closed by default (right), valve spindle 13 moves upwards when switching diaphragm valve 9. For each movement of valve spindle 13, diaphragm 1 is moved as well. Since these movements occur explosively (pressurized air inflows in sudden bursts into the chamber, the spring retracting when pressure is released from the chamber), the diaphragm has to be configured in an adequately resistant manner and a force flow as smoothly as possible from valve spindle 13 onto diaphragm 1 has to be enabled. This is substantially the object of force transmission component 6 which, as shown in FIGS. 1 and 2, positively engages into reinforcement layer 3 and base body 2 of diaphragm 1.
LIST OF REFERENCE CHARACTERS
[0043] 1. diaphragm [0044] 2. base body [0045] 3. reinforcement area [0046] 4. side facing towards the media [0047] 5. side facing away from the media [0048] 6. force transmission component [0049] 7. elastomer extension [0050] 8. component opening [0051] 9. diaphragm valve [0052] 10. valve seat [0053] 11. spindle drive [0054] 12. valve housing [0055] 13. valve spindle [0056] 14. pressure spring [0057] 15. switching chamber
