DE1898239U - BALL VALVES WITH LARGE SIZES. - Google Patents

Description

Ball valves with large nominal sizes.

The invention relates to a ball valve with large Nominal widths for controlling the passage of flowing media, in which the sealing seats with dome-shaped Ground sealing surfaces elastically printed on top of each other. Difficulties are encountered, especially for large nominal sizes the moving seal seat on the unmatched To press sealing seat sealingly. In the known embodiments there is the movable one Sealing fit within a connection piece that is easily is detachably screwed into the housing via clamping rings or the like. This should make it easier to replace the movable seal seats can be achieved. However, such an arrangement accepts that a proper seal towards the inside of the house becomes impossible. Also are such known configurations are only possible for small nominal sizes.

Patent attorney Albert Sd) Orhoff «V + _Q. CA / o / ΟΛ _ S _n V ₁ Aa _n V ₁₁ I page.? ..

File: 64/2/21 - Sch / Scliu

The invention has set itself the task of to eliminate the difficulties in the simplest possible way. Its essence is seen in particular in that the movable seal seats in the closure piece and aie immovable seal seats are arranged in the housing.

The subject of the invention is shown schematically in the drawing by means of an exemplary embodiment, namely shows:

1 shows a longitudinal section through a spherical slide designed according to the invention;

Pig. 2 shows a longitudinal section through the closure piece of the subject of the Pig. 1 with withdrawn movable sealing seats;

Pig. Figure 3 is a cross-section of the subject of the Pig. 1;

Pig. 4 shows a longitudinal section through a ball valve according to the invention in another embodiment

To solve the problem, the invention is based on the knowledge that a proper Sealing and also easy replaceability of the parts subject to heavy wear then enables is when the movable seal seats are arranged in the closure piece and the immovable seal seats in the housing are. Such an arrangement also enables the use of a ball valve with large nominal sizes for controlling the passage of flowing media.

In the embodiment shown in the drawing, the closure piece 1 is through the

Libertscorhoff files: 64/2/21 ä Sch / Schu

Dlpl.-lng. ^Scltc

Pin 2 rotatably mounted about axis 3, jus is in According to the invention, the movable seal seats 4 are provided in the closure piece 1. Each of the "moving Dichtuhgs seats 4 has a guide in the locking piece 1 and forms with the locking piece 1 a pressure chamber 5> who is under the action of a pressure medium. Am ring 6 on the movable one Sealing seat 4 is in an annular groove of the closure body

1 guided in the axial direction. A seal 7 on the circumference of a ring 6 prevents the passage of the flowing medium into the interior 8 of the housing. The pressure chambers 5 of the movable seal seats 4 have an axial bore 9 in the Drive pin 2 of the locking piece 1 a common introduction of the pressure medium through channels 10.

The immovable seal seats will be

formed by rings 11, which are pressed by the movable sealing seats 4 against connecting pieces 12 of the housing 13. Saddle pieces 14 on the upper cover 15 and on the lower cover 16 partially encompass the sealing rings 11. The upper cover 15 is pushed onto the drive pin 2 and in the housing 17 pushed in and held in an easily releasable manner by a snap ring 18. The lower cover 16 serves as a warehouse for a pin 19 which is diametrically opposite the drive pin

2 sits on the locking piece 1. The lower cover 16 is the same In the same way as the upper cover 15 is pushed into the slide housing 13 and held easily detachable by a snap ring 20.

Patent Attorney Albert Scbnrhoff File: 64/2/21 - Sch / _{SchU Seltc}

■ Dlpl.-lng.

[ A pressure medium flows through the axial drilling

^; tion 9 as well as through the bores 10 of the closure piece 1 fc * and acts on the pressure spaces 5 between the movable seal seats 4 and the closure piece 1. As a result, the seal seats 4 are pressed against the sealing rings 11. In this way, the closing

■ Position of the locking piece 1 a proper and simple one

Sealing of the flowing medium. To replace the parts that are subject to wear, it is sufficient to remove the snap rings 18, 20 to solve and remove the cover 15 and 16. As a result, sealing rings 11 are exposed and can with the entire Closure piece 1 and its movable seal seat 4 are replaced.

The subject of the invention is thereby not

leave that, as shown in FIG. 4, the Axialteerschiebungen the movable seal seats 4 are carried out by a mechanical expansion device, which is axially of a drive pin 2 displaceable plunger 21 is actuated. Sin expanding ring consists of two parts 22. Their remote ends are as expanding pieces 23 formed. Their facing ends 24 have wedge surfaces on, between which a conical end 25 of the axially displaceable plunger 21 in the drive pin 2 engages. The movable seal seats 4 are supported on the wedge-shaped spicing pieces 23 via balls. To cancel the spreading effect are the wedge-shaped expansion pieces 23 of the ring parts 22 in the circumferential direction under the action of energy storage devices 27

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Patent Attorney Albert SchOrhoff Files: 64: 2/21 - Sch / SchU 5 , DlpUlng. ^Seldom

In the closed position of the

sciilußstüekes 1 is located, the plunger 21 in the inserted Position. As a result, the ring parts 22 are in the circumferential direction moved against the pressure of the energy storage device 27. The wedge-shaped expansion pieces 23 of the ring parts 22 act here over the balls 26 on the movable seal seats 4. This has the consequence that the movable seal seats 4 against the immovable sealing rings 11 are printed sealingly. In this way, a mechanical pressing of the dome-shaped ones is created Sealing seats against immovable sealing rings in ball valves, which are also used for large Henn widths Can apply. The arrangement of the locking piece with their movable sealing seats 4 and the immovable sealing rings 11 takes place in the same way as at the on the Pig. 1 _ 3 illustrated embodiments.

Claims (8)

Protection claims 1 . Ball valves with large nominal widths for controlling the passage of flowing media in welehern spherical seal seats are printed on top of each other, characterized in that the movable sealing seats in the closure piece and the immovable sealing seats are arranged in the housing. 2. KugelscMeber according to claim 1, characterized in that each of the movable seal seats is guided in the closure piece. 3. KugelscMeber according to claim 1 and 2, characterized in that each movable seal seat forms with the closure piece a pressure space which is under the action of a pressure medium. 4. KugelscMeber according to claims 1-3, characterized in that the pressure chambers of the movable Seal seats via an axial bore in the drive journal of the closure piece a common introduction of the pressure medium to have. 5. KugelscMeber according to claims 1-2, characterized in that the Axialteerschiebungen the movable Sealing seats are carried out by a mechanical expansion device, which is operated by a drive pin in the Terschlußstückes axially displaceable plunger is operated. mm schehoff files: 64/2/21 - Sch / Schu Dlpl.-Ing. 6. Kugeiseiieber after. Claim 1, 2 and 5, characterized in that an expanding ring consists of two parts in the circumferential direction, the ends of which are turned away as Spreading pieces are designed for the movable seal seats and their facing ends have wedge surfaces, between which a conical end of the plunger, which is axially displaceable in the drive pin, engages. 7. Ball valve according to claim 1, 2, 5 and 6, characterized in that the movable seal seats are supported by balls on wedge-shaped expansion pieces at the remote ends of the ring parts. 8. Ball valve according to claim 1,2 and 5-7, characterized in that to cancel the spreading effect the wedge-shaped expansion pieces of the singing parts in circumferential direction are under the action of lift mechanisms. The patent attorney AIBEST 3CH.RHOI ¹ S ¹