DE1068523B - - Google Patents

Description

GERMAN

AJ's shut-off devices are used for all media to be conveyed in pipelines, such as vapors, gases and liquids. While the usual slide valves are mainly used for shutting off, the nozzle regulating slide valves are used as throttling, but mainly as regulating devices at high and extremely high pressures, both for large and very small volume controls. Depending on the type of lines and media, slightly damaging, even dangerous, backwater jams and kickbacks occur in the line, which can damage, even destroy, machines, apparatus and instruments. In order to counteract these backward, harmful pressure surges with some degree of effectiveness, one was forced to take special safety precautions. These mainly consist in the fact that backlash flaps or check valves or, in special cases, explosion flaps have been installed in the places considered suitable. This return Stthlagsicherungen are separate devices and ver long during operation its own monitoring, which is in most cases very difficult, even impossible ÖFT. This is because such devices, which are not exposed to visible or noticeable malfunctions in their own, completely closed housing, have often failed if necessary because they were blocked either by corrosion or by foreign bodies or by some other cause. Furthermore, these devices have their own flange connections and thus a further possibility of leaks. In addition, it is an increasing disadvantage that two devices are required: a shut-off or regulating device and a non-return or safety device.

All these significant disadvantages are eliminated by the present invention, of the nozzle control slide, which is absolutely non-return-proof in every position and at any time, for regulating the pressure or the flow rate in gas, steam or liquid lines with the slide plate movably articulated on the spindle and on both sides of the slide plate in the housing Allowed sealing seats, whereby the inlet-side seat has an opening approximately corresponding to the inlet line and the outlet-side seat has the nozzle-shaped passage openings, according to the invention eliminated by the fact that the slide Dlatte extends beyond the sealing surfaces, the lengthened plate surface facing the outlet-side seat opposite that through the sealing surfaces formed level set back and a sufficient between the inlet side housing seat and the sealingly adjacent slide plate on the outlet side seat

Backlash-proof nozzle control valve

Applicant:
Aniline & Soda Factory in Baden
Corporation,
Ludwigshafen (Rhine)

Georg Stech, Ludwigshafen / Rhine,
has been named as the inventor

large distance is provided for the passage of the medium.

Here, the slide plate is articulated to the spindle so that it can move axially sufficiently so that it in the event of a kickback, sealing themselves against the influx-seifigen seat and thus a propagation or a flashback or detonation wave passing through the nozzle control valve can prevent. After this recoil has subsided and when normal pressure conditions occur, d. H. higher pressure in front of the valve in the inflow line, the valve plate loosens itself again from the sealing surface of the inflow-side seat and lies down again sealingly on the outflow-side seat at. The inflow seat may be arranged to be part of the housing or to be attached to it a ring inserted tightly into the housing. The arrangement can be chosen so that the passage opening with sealing surface on the nozzle opposite the passage opening of the inflow side Seat is shifted so far that with full release of the nozzle openings, the slide plate is the inflow side The seat is still fully covered, the slide plate being secured against being pulled up too far. Arrangements for limiting movements of the closure piece are known per se. With regard to Their purpose to be exercised is the slide plate on the side of the outlet-side seat on the elongated one Expediently at the end in terms of flow technology, recessed, so that the slide plate is opened by a kickback that occurs is pressed against the inflow seat in the shortest possible time. The passage openings can also be used here or openings of the nozzle in alignment with the passage opening of the seat on the inflow side lie. Due to the fluidic design of the extension of the slide plate is a through the Recoil escaping from the nozzle openings in each opening

909 647/227

Claims (5)

position of the slide plate in the recess of the extended slide plate. In order to fully absorb this recoil as far as possible, a protruding impact or deflection edge is arranged at the upper and lower end of the recess. In addition, the recess can be ribbed. In order to achieve easy and safe application of the slide plate to the seat on the inflow side in the event of a recoil, the sealing surface of this seat is expediently arranged at an angle with respect to the spindle socket. The application of the slide plate to the seat on the inflow side is further assisted by the fact that the slide plate is hinged to the spindle head in a manner known per se. In special cases, if the distances between the seat on the inflow side and the valve plate are too large, spring upholstery can be attached to this seat in order to prevent the valve plate from hitting this seat too hard when recoil waves occur. The present nozzle control slide thus combines both devices in itself, i. H. a shut-off or control device and a non-return device. With its only sealing and regulating part, the slide plate, which can be moved in the direction of the spindle axis and transversely to it, not only can the normal flow be shut off tightly or the flow can be finely regulated, but also any recoil caused by the slide against the direction of flow can be reliably prevented. Its mode of operation is inevitable, because its moving parts, the spindle and the slide plate, which are constantly in operation during operation and must therefore be checked to ensure that they are working properly, guarantee that the nozzle control slide is unhindered in its activity and is ready for operation as a safety device is. It does not require any special maintenance during operation and is absolutely safe against kickback in every position and position. It offers safe protection against any explosion or detonation waves within the lines behind its outlet connection in the direction of flow for the apparatus, systems and instruments in front of it. The subject of the invention is explained in more detail with reference to Figs. I to IV: Fig. I shows in section the housing 1 with the nozzle insert 2 and the nozzle 3 with the opening 4 in front of the nozzle 3, with the slide plate 5 sealingly adjacent to it the fluidic extension 6 on the nozzle side, the baffle or deflection edges 7 a and 7 b and the spherical recess 8. The slide plate 5 is movably articulated by a tab 9 on the spindle 10, in such a way that up and down There is practically no play in order to avoid backlash when regulating the flow, while a movement of the slide plate 5 through the tab 9 can easily take place in the direction of flow. In the direction of flow in front of the slide plate 5, the seat 11 with the passage opening 12 is arranged with its sealing surface against the slide plate 5 and its extension 6. The passage opening 12 of the seat 11 is equal to or approximately as large as the pipe diameter, while the passage opening or openings of the nozzle 3 as the actual throttle are smaller in cross section than the free passage cross section in the seat 11 and between the seat 11 and the slide plate 5 Seat 11 can optionally also be designed as a pre-nozzle or radiation nozzle in order to allow the medium to occur on the slide plate 5 at high speed. The central axis of the passage opening 12 of the seat 11 and the passage openings 4 of the nozzle 3 can advantageously be shifted. Furthermore, a cone 13, known per se, is arranged on the spindle 10, which prevents unwanted excessive pulling up of the slide plate 5 and at the same time enables an upward sealing when packing the stuffing box during operation. Fig. II shows in section the slide similar to Fig. I, but with the nozzle 3 and the seat 11 in alignment. Fig. III shows the nozzle-shaped seat 11 with the passage opening 12. Fig. IV shows the Nozzle 3 with the passage opening 4, which in this case is designed as a narrow slot, in order to achieve fine control. Patent claims: 1. Non-return nozzle control valve for regulating the pressure or the flow rate in Gas, steam or liquid lines with the slide plate movably articulated on the spindle and sealing seats arranged on both sides of the slide plate in the housing, the inflow side Seat an opening approximately corresponding to the inflow line and the outflow-side seat the nozzle-shaped one Has through tri ttsöffnungen, characterized in that the slide plate on the Sealing surfaces also extended, the extended plate surface facing the seat on the outlet side set back in relation to the plane formed by the sealing surfaces and between the inflow side Housing seat and the slide plate sealingly on the outlet side seat a sufficient large distance is provided for the passage of the medium. 2. Nozzle control slide valve according to claim 1, characterized in that the inflow side seat in on as is known, either a part of the housing or a seal in the housing inserted ring is located. 3. Nozzle control slide according to claims 1 and 2, characterized in that the passage opening with sealing surface on the nozzle (4) relative to the passage opening (12) of the inflow side seat is shifted so far that when the nozzle opening is fully released, the slide plate (5) the The seat on the inflow side is still fully covered, the slide plate being secured against being pulled up too far. 4. Nozzle control slide according to claims 1 to 3, characterized in that the sealing surface the seat on the inflow side is arranged obliquely with respect to the spindle axis. 5. Nozzle control slide according to claims 1 to 4, characterized in that the slide plate (5 ) is hinged to the spindle head (13) by means of a bracket (9). Considered publications:
German Patent Nos. 803 624, 736 861;
French Patent No. 485,401;
U.S. Patent Nos. 2,780,233, 1,998,223. 1 sheet of drawings © 909 647/227 10:59