DE1147095B - Relieved single-seat valve for steam turbines - Google Patents

Description

GERMAN

PATENT OFFICE

L31877Xn / 47g

REGISTRATION DATE: DECEMBER 2, 1958

NOTICE THE REGISTRATION AND ISSUE OF EDITORIAL: 11. A P RI L 1963

The invention relates to a single-seat valve with relief by pressure equalization with a pipe slide trained main locking piece and one in a transverse wall of the main locking piece arranged seat for a pre-stroke valve closure piece firmly connected to the valve spindle and with a plate-shaped screen wall firmly attached to the end of the spindle protruding beyond the pre-stroke valve, which forms an annular space with the main closing piece, which is used to prevent the main closing piece from fluttering during the opening movement by generating a frictional connection between the main locking piece and the screen wall is connected to the outflow space of the valve by means of media pressure, according to patent 1 103 099. According to the subject of this patent, the annular space is in the open position of the Valve from the relief space and the relief channel through one designed as a sealing point Stop between main closure piece and screen body separated and with the outflow space connected via an annular gap near the valve seat.

According to the invention, the subject matter of said patent is further developed in that this annular space to act on with the lower prevailing in the middle of the outflow space Pressure with the outflow space through one in the wall of the screen wall up to its in the outflow space protruding tip is connected to the running channel.

In a further embodiment of the invention, a measure known per se is proposed, namely in the bottom surface of the screen wall of a relieved valve to provide holes for the passage of the medium. Accordingly, it is used to compensate for compressive forces over the bottom surface of the screen wall a larger number of bores distributed, which in their entirety to relieve the main locking piece Allow necessary passage of work equipment.

The advantage of the invention is that even with a swirling outflow a frictional connection between the Main closure piece and the screen wall is achieved by taking the pressure off for the frictional connection takes place in the middle of the valve base, where the static pressure always occurs with a swirling outflow is smaller than at all other points on the valve bottom surface.

In the drawing, an embodiment according to the invention is shown schematically.

The main closing piece 11, designed as a tubular slide, has a transverse wall 14 with the valve seat 15, which together with the single-seat valve for steam turbines, which is relieved on the valve spindle

Addendum to patent 1 103 099

Applicant:

Licentia Patent Administration G. m. B. H., Frankfurt / M., Theodor-Stern-Kai 1

Dipl.-Ing. Otto-Günther Schmidt,

Essen-Holsterhausen has been named as the inventor

12 firmly connected Vorhubventilverschlußstück 13 forms the Vorhubventil. Located at the end of the spindle the screen wall 17, which forms an annular space 16 with the main closure piece through the seat 20 and the movement gap 22 between the opening wall and the main closure piece completed is. This annular space is via the channel 19, which according to the invention through the wall of the screen wall is passed and opens into a tip protruding into the outflow space, with the working medium pressure acted upon in the center of the outflow space 18. This creates a frictional connection between achieved the main closure piece and the screen wall. To relieve the valve is in the screen wall in a manner known per se, a larger number of bores 21 are provided for the compensation of compressive forces are distributed over the entire bottom surface of the screen wall and in their entirety allow the passage of work equipment necessary to relieve the burden.

Claims (2)

PATENT CLAIMS: 1. Single-seat valve with relief by pressure equalization with a tubular slide valve Main closure piece and one arranged in a transverse wall of the main closure piece Seat for a pre-stroke valve closure piece firmly connected to the valve spindle and with a plate-shaped spindle fixedly attached to the spindle end protruding beyond the pilot stroke valve Screen wall, which forms an annular space with the main closure piece, which is used to prevent the Fluttering of the main lock during the 309 549/177 Opening movement is connected to the outflow space of the valve by generating a force fit between the main closure piece and the screen wall by means of media pressure, according to patent 1103 099, characterized in that the annular space (16) is subjected to the lower pressure prevailing in the middle of the outflow space (18) with the Outflow space is connected by a channel (19) running in the wall of the screen wall (17) up to its tip protruding into the outflow space. 2. Single seat valve according to claim 1, characterized in that for the compensation of compressive forces a larger number of bores (21) distributed over the bottom surface of the screen wall (17) is, which in its entirety is necessary to relieve the main locking piece (11) Allow work equipment to pass through. Considered publications:
German patent specification No. 218 715. 1 sheet of drawings © 309 549/177 4.63