DE2233954A1 - DEVICE FOR ACHIEVING QUIET OPERATION OF VALVES, IN PARTICULAR PRESSURE REDUCING VALVES - Google Patents

Description

80OO Munich 9O

8ohlotthautrstr. B »8 Τ · Ι. (0x11) 652321

SAMSON APPARATEBAU A. G., Frankfurt am Main, Weismüllerstrasse 5

Device for achieving low-noise operation of valves, in particular pressure reducing valves

The invention relates to a device for achieving low-noise operation of valves for flowing media, in particular of pressure reducing valves, their throttle or valve seat opening cooperates with a throttle or valve closure body against which the flow is flowing against its closing direction.

309885/0668

223395A

Valves of this type, especially pressure reducing devices for liquids, gases and vapors, can generate loud noises during operation and are subject to severe wear and tear if a certain pressure difference on the device is exceeded. How big this pressure difference in each case may be, depends, among other things, on the design the throttle device. It is also important that the flow does not enter the area the formation of cavitation or the supersonic speed comes. Therefore show different Devices have very different noise behavior under the same operating conditions. The ratios are quite complicated, and in the past numerous attempts have usually been made in such cases turn on to keep the noise as low as possible. In practice, the lack of usable Rules or guidelines for training low-noise devices are very uncomfortable.

The invention is therefore based on the object of providing the person skilled in the art with simple and usable instructions for the creation of throttle and pressure reducing devices or other expansion devices

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to give which much larger pressure differences than the previously common devices can process,

without exceeding a tolerable noise level during operation.

It has been found that this goal can be achieved with a Valve or the like. can be achieved in the direction of flow practically immediately behind the throttle cross-section of the valve is an approximately truncated cone that widens in the direction of flow Guide body is arranged, the cone angle and height are dimensioned so that the flow on Conical surface of the guide body rests and a relatively experiences strong contraction. These measurements reduce the noise behavior of the valve or the Druckmindereinriehtung significantly improved.

In practice, such a device can be implemented in various ways. According to a A particularly useful embodiment of the invention is the guide body with a 'throttle or Valve seat opening of the valve immersing throttle body connected, its to the smaller truncated cone base

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of the guide body adjoining cross-section approximately the clear width of the throttle or valve seat opening has a corresponding diameter and which tapers against the direction of flow. At the transition from the throttle body to the guide body can preferably be one with the valve seat cooperating sealing edge or sealing surface are provided. This sealing surface should be appropriate well rounded merge into the conical surface of the guide body. It is also favorable certain areas for the cone angle of the cone jacket of the guide body and for its height in With regard to the diameter of the throttle opening.

In the drawing, the invention is illustrated in one embodiment, for example.

Fig. 1 shows a longitudinal section of a valve with a throttle body and a Guide body according to the invention, and

Fig. 2 shows schematically an enlarged section A from Fig. 1.

309885/0669 - d -

In a valve housing 1 there is a valve seat 2 which has a throttle opening

3 encloses, the clear width of which has a diameter D. The surface of the valve seat 2 is not flat, but has a collar

4 so that the flow running in the direction of the arrows is at this Position cannot create. A throttle body 5 »of which tapers counter to the flow direction dips into the throttle opening J The largest diameter corresponds to the diameter D of the throttle opening 5.

Immediately behind the throttle cross-section of the valve seat 2 is an approximately frustoconical Arranged guide body 6, which is firmly connected to the throttle body 4 or to the latter consists of one piece. The bodies 5 * 6 are attached to a valve rod 7 which is led out of the valve housing 1 through a stuffing box 8 is. The valve rod 7 can be actuated or driven by any means. At the transition from the throttle body 5 to the guide body is' an annular sealing edge or sealing surface intended.

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The conical surface 10 of the guide body 6 has a cone angle <X _t which, according to an embodiment of the invention that has been found to be particularly favorable, is approximately ^ 0. Was also

A dimensioning of the guide body 6 with a height H which is at least approximately a quarter of the diameter D of the throttle opening j5 or the smaller truncated cone base of the guide body 6 has been found to be particularly favorable. The sealing surface 9 of the guide or throttle body preferably merges into the conical jacket surface 10 at an angle β of at most approximately jjO and with a radius of rounding r of at most approximately 0.2 D. Taking these guidelines into account, particularly favorable results were in fact achieved with regard to the noise behavior with the following dimensions of the guide body 6:

Otherwise, the invention is not limited to that described above and in the drawing Illustrated embodiment, but it includes all variants and designs

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- γ _

other pressure and relaxation equipment.

Expectations

309885/086

Claims (1)

Patent claim: 1 .. Device for achieving a low-noise operation of valves for flowing media, in particular pressure reducing valves, whose Drosselöffnun ^ cooperates with a throttle body flowing against its oculießrichtung, characterized in that in the flow direction _o directly behind the throttle cross-section of the valve is an approximately truncated cone shape Flow direction widening guide body (6) is arranged, the cone angle (^ C) and height (H) are dimensioned so that the flow rests on the cone shell (10) and experiences a relatively strong contraction, 2. Device according to claim 1, characterized in that that the guide body (6) with a dipping into the throttle opening (j5) of the valve Throttle body (5) is connected, whose to the smaller truncated cone base of the guide body (6) adjoining cross-section corresponds approximately to the clearance of the throttle opening (j>) Has diameter (D) and which tapers against the direction of flow. 3098 8 5 / 06Bf? ■. '' >. Device according to Claims 1 and 2, characterized that on the - "transition from the Droscel body (3) 2UiH guide body (6) .one with the valve seat (2) cooperating DiCütkante or "sealing surface (9) is provided. 4. Device according to one or more of claims 1 to>, characterized in that the height (H) of the guide body (β) at least about a quarter of the diameter (D) of the throttle opening (~ ß) or the smaller truncated cone base of the Guide body (6) and the cone angle (<*) of the same is at most and preferably about jj0. 5 «device according to claim; and 4, characterized in that the sealing surface (9) of the guide or throttle body with an angle ( / 3 ) of at most about 30 ° and with a radius of curvature (r) of. at most about 0.2 D merges into the conical surface (1G). 6. Vorri-ehtu-ng according to one or more of the claims 1 to 5 * characterized in that the surface of the valve seat (2) has a protruding collar (4). 309885 / 0.860 _k Edmund Patent attorney BATH ORIGINAL JQ Blank page