DE1017869B - Double-plate wedge gate valve with attachments provided on the facing sides of the plates for mutual rotatable support - Google Patents

Description

GERMAN

The invention relates to a double-plate wedge gate valve, in which the gate valve plates are supported one of the plates against each other on its side facing the other plate with an approach having spherical surface, on which a shoulder of the other plate with a concave recess rotatably comes to the plant and the plates with a spindle, against rotation around the Flow axis secured, connected.

The invention consists in the fact that when a known plate holder is arranged, the approaches are almost square in plan and the plate holder has a correspondingly formed receiving opening having.

Double-plate wedge gate valve, in which the plates face each other on a spherical surface support are known per se. The panels are guided either directly by ribs in the Housing, in which the tabs located on the plates engage or by a guide rod, which is encompassed by flaps located on the plates. The plates are connected to a spindle and thereby secured against rotation about the flow axis. Securing against rotation of the panels the flow axis is necessary because when one plate is rotated, the two plates no longer have the required would have necessary wedge angles for tight fit on the seat surfaces. In the Actuation of the slide can nevertheless jam the plates, especially if if the valve is installed in a horizontal pipe with a horizontal spindle. at In this installation position, the plates fall down due to their weight and are on the lower guide rail moved in the housing. The resulting resistance in the movement leads to a Jamming of the panels.

Double-plate wedge slides are also known in which the plates are mounted in a plate holder are, but the plates are supported on a ball arranged in the middle. There will be the plates against rotation around the flow axis by installing special guide bodies secured in the plate holder to hold the plates at the necessary wedge angle. With this conviction however, additional components are required, which make assembly difficult and expensive.

In contrast, in the subject matter of the invention, the security against rotating the plates is the flow axis is simple and does not require any additional components or guide tabs with guide rails. The assembly of the slide is also easy as a result.

The necessary protection against twisting ....

Double-plate wedge gate valve

with on the facing sides

of the plates provided approaches

for mutual rotatable

Support

Applicant:

Eisenwerk Rödinghausen K.-G.,
Lendringsen (Kr.Iserlohn)

Dipl.-Ing. Erich Beck, Lendringsen (Kr.Iserlohn),
has been named as the inventor

of the plates around the flow axis in the embodiment according to the invention, in which the spherical cap surfaces arranged at the approaches of the plates at an acute angle to the seat surface of the plates are, is achieved by the fact that the approaches to the plates are out of round, and approximately are square.

In the drawing, the subject matter of the invention is shown in one embodiment. It shows

1 shows a section through the wedge slide,

2 shows a side view of the wedge slide with a section through the housing,

FIG. 3 shows a section along the line AA in FIG. 2.

The two plates 1 and 2 support each other in such a way that the plate 2 on the side facing the plate 1 has a projection 3 with a spherical surface 3 α , to which a corresponding projection 4 with a concave recess 4 α. the plate 1 comes to rest in a rotatable manner. They represent the mutual support of the two plates to one another and are slightly rounded on their side surfaces, so that on the one hand they cover the plates on as large an area as possible, on the other hand they have an almost square base area. The lugs are enclosed by a plate holder 5 with a receiving opening 6 corresponding to the cross section of the lugs, which prevents the plates 1, 2 from rotating in the plate holder. The plate holder is equipped on the housing side with guide strips 7, 8, which engage in corresponding double ribs 10 provided on the slide housing 9 and each rotation of the

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Prevent the plate holder and thus the plates themselves around the spindle axis. To his height movement the plate holder is firmly connected to the spindle 11. A torque affecting them of the handwheel is received by the ribs 10 without jamming of the plate holder could occur. - - -

Due to the design according to the invention of the approaches provided on the plates and the one encompassing them Plate holder on the one hand and the arrangement of the guide strips and ribs on the other hand, each Rotational movement of the plates is prevented, so that the plates can be properly guided when opening and Closing the slide is guaranteed.

15th

Claims (1)

PATENT CLAIM: Double-plate wedge gate valve, in which the gate valve plates are supported against each other one of the plates on its side facing the other plate has an approach with a spherical shape Has surface on which a shoulder of the other plate with a concave recess rotatably comes to the plant and the plates with a spindle, against rotation about the flow axis secured, are connected, characterized in that when arranged one per se known plate holder, the approaches in plan are almost square and the Plate holder has a correspondingly designed receiving opening. Considered publications:
German Patent Nos. 833 283, 824 724, 938, 758 742, 725 719, 642 546, 270 221, 114 725; French patents nos. 740 566, 725 520, 534. 1 sheet of drawings © 709 756/252 10.57