SE467353B - KALOTTSLID - Google Patents

Description

4. 10 15 20 25 30 35 7 555 movement limiting elements are arranged for the annular piston, each percussion movement limiting element consisting of a bolt device connected to the cylinder bottom and extending through the working space up to the annular piston, which for the respective end positions of the annular piston has an abutment surface.

In contrast to the known cap slide, in which the sealing discs are held in a outer ring at their outer circumference and elastically deformed by it at the pressure of the ring piston, the invention thus offers a floating arrangement of the sealing ring discs, which do not have to consist of elastic material. of the spring-loaded metal bellows, whose spring constant and whose suspension path can be determined in accordance with the required restoring force, by suitable material selection and dimensioning, regardless of the material used for the sealing plates and their dimensions.

According to a preferred embodiment, the edges of the bellows in question are pressure-tightly connected to the annular piston on one side and an annular cylinder base on the other side. In this way, an independent drive unit for the sealing ring discs is obtained.

A further embodiment is characterized in that the sealing ring discs, the ring piston, the sealing bellows and the cylinder bottom form a totally replaceable sealing device.

A suitable pressure medium supply can be achieved by the constructive features specified in claim 4.

Impact limiting elements are essential in that they improve operational reliability, especially when leaks occur in the print media system or the maximum permissible pressure is exceeded.

Figures 1 and 2 show a cap slide according to the invention illustrated schematically and simplified, in an embodiment chosen as an example.

The cap slide consists of a housing upper part 1a and a housing lower part 1b, each of which is made in a welding construction and is screwed together via sealed connecting flanges. In the housing lower part 1b a ball cap 2 is pivotally mounted, which can extend, for example, over an angular range of about 900. For that matter, the ball cap 2 is rotatably connected to two shaft pins 3a, Bb, 'w-10 15 20 25 30 35. fl x C \ -J LN CH C fl which are received in bearings 4a, 4b and of which the shaft journal 3a is connected to a torsional rotation not illustrated.

In the housing upper part 1a, a sealing device is arranged in an annular space 8 coaxial to the inlet opening 5, bounded by an inner wall 6 and an outer wall 7. The sealing device consists of a package of three sealing ring plates 9a, Qb, 9c with gradually increasing inner diameters. The sealing ring discs Qa, Qb, Qc pour two elastic sealing rings 10a, 10b and are screwed against a ring piston 11. The ring piston 11 is driven by a ring cylinder, the working space 12 of which is limited by an inner spring-elastic metal bellows 13, a similar outer metal bellows 15 and a cylindrical bellows bellows 14. The cylinder bottom 15 abuts with its upper side against the underside of the connecting flange 16 of the housing upper part 1a. This connecting flange 16 has two rectangular bores 17a, 17b, of which the bore 17a merges into a pressure medium connection 18, preferably a compressed air connection, while the bore 17b the upper side of the cylinder base 15, from which a number of circumferentially distributed connecting bores 20 open through the cylinder base 15 into the working space 12. In the figure one can only see one of these connecting bores 19. The necessary seal is ensured by two mutually concentric, in the cylinder bottom 15 inlaid O-rings 21a, 21b.

The ring piston 11 performs between its shown resting position, in which the working space 12 is depressurized, and its working position, in which the sealing rings 10a, the cap 2, 10b abut abutting against the top of the ball a working stroke of a few millimeters. In the working space 12 several stroke limiting elements are arranged over its circumference, of which only one element is shown in the drawing. Each striking movement limiting element consists of a sleeve 22, which by means of a screw 23 is screwed into the cylinder bottom 15 through a corresponding bore in the ring piston 11. The sleeve 22 has a diameter ledge, against which the ring piston 11 abuts by means of a collar 24 in its rest position, wherein in the working position of the ring piston 11, the collar comes into abutment against a disc 25 between the head of the screw bolt 23 and the end surface of the sleeve 22.

Claims (4)

467 355 10 15 20 25 30 4 PATENT REQUIREMENTS A hood slide for bulkhead lines and containers consisting of a housing (1a, 1b) with a round opening (5), which can be closed by means of a hood (2) pivotally mounted in the housing, the annular edge area projecting past the edge of the opening is sealable by means of sealing ring plates (9a, 9b, 9c), which are movable by means of a fluid-actuable ring piston (11) arranged in the housing coaxially with the opening, which limits a ring-cylindrical pressurizable working space (12), characterized in that the sealing ring plates (9a, 9b, 9c) are fixedly connected to the ring piston (11), that the walls of the ring-cylindrical working space (12) consist of two, coaxial spring-elastic metal bellows (13, 14), and that stroke movement limiting elements (22-25) are arranged for the ring piston (11), each impact movement limiting element consisting of a bolt device (22, 23) which is connected to the cylinder bottom (15) and extends through the working space (12) to the ring piston (11), which has a stop for the respective end positions of the ring piston. surface for a counter surface formed on the ring piston (24). Calotte slide according to Claim 1, characterized in that the respective edges of the bellows (13, 14) are pressure-tightly connected on the one hand to the annular piston (11) and on the other hand to an annular cylinder base (15). Canopy slide according to Claim 1 or 2, characterized in that the sealing ring discs (9a, 9b, 9c), the ring piston (11), the bellows (13, 14) and the cylinder bottom (15) form a completely replaceable sealing device. Canopy slide according to claim 2 or 3, characterized in that the cylinder bottom (15) sealingly (21a, 21b) abuts against a housing surface, in which at least one housing bore (17a, 17b) connected to a pressure medium source opens, that a groove (19) is arranged as a distribution channel between the housing surface and the support surface of the cylinder bottom, and that the cylinder bottom (15) has connecting bores (20) distributed over its circumference between the distribution channel and the working space (12).