DE616112C - Drive for valves, gate valves or the like. - Google Patents

Description

14 AUG. 1925

ISSUED ON
JULY 20, 1935

In the case of drives for shut-off elements, such as valves, slides or the like, are to be opened and closing of the slide different strengths are required, namely zr.; n Opening the shut-off elements usually requires a greater force than needed to close. The shut-off element is pressed against a firm seat during the flow process, whereby the friction between the gear parts is increased. The motor must therefore overcome this increased initial friction when opening and. unless special Means are provided for the high performance required for this purpose. Furthermore, with consideration of the stress on the individual parts of the shut-off element and its drive, an unacceptable increase in the closing pressure can be avoided. So you already have at

ao such drives switched on between the shut-off element and the motor, an elastic intermediate element, over which the power flow was directed, and that when the valve hit on the valve seat allowed a relative movement between the driving and driven shaft. However, the known arrangement has the disadvantage that the elastic intermediate member must transmit the entire driving force. It is therefore evident in drives of this type after a relatively short period of operation Signs of fatigue on the elastic pontic, causing the originally intended course of the closing process is in question.

It is the object of the present invention based on the retention of very specific closing pressures with valves motor drive, but it is essential that this closing pressure is exceeded to prevent, otherwise the proper opening of the shut-off element will not be secured appears. Furthermore, it should also be achieved that the movement of the expiring Gear masses is intercepted without affecting the ab-> 5 To transmit locking member and thereby bring about an increase in the closing pressure.

According to the invention this is achieved in that in the known propulsion devices For valves or the like, in which the drive of the shut-off element has an off Curves and rollers existing locking mechanism held in engagement by an energy storage mechanism takes place, the part of the locking mechanism driven by the motor cannot rotate, but is axially displaceable is arranged on the valve spindle and with a likewise axially displaceable brake disc cooperates. The one used to intercept the leaking gear mass Iircmsgliod is in the direction of the catching force of the locking mechanism, on the other hand, arranged to be flexible in the axial direction. A particularly useful training can be achieved by using two

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-IiIg. Otto Körher in Berlin-Cliarlottenhiirg.

Claims (4)

010112 Reach roller locks arranged symmetrically to one another. The arrangement can be made here so that the driving force on the roller lock by a common Transmission part is transmitted. This arrangement ensures that the two locking mechanisms work completely evenly guaranteed. From the axial movement of the locking parts or the braking members can ίο switching operations, such as B. switching off the drive motor, switching on display devices, Additional delay devices or the like., Derived. In FIGS. 1 and 2, an exemplary embodiment is shown partially in elevation and in view, which shows a drive with two symmetrically arranged roller locks. The drive pinion 2 fastened on the shaft 1 is in engagement with the ring gears 3 and 4, in the wheel bodies 5 and 6 of which two rollers 7 and 8 as well as 9 and 10 are rotatably mounted. By the springs, the wheel bodies 5 and 6, which are arranged freely movable on the shaft 12 , are pressed against the disks 13 and 14 fixedly connected to the shaft 12 , the spirally extending cams 15, 10 and 17 and 18, with which the Roles are in contact. Between the wheel bodies 5 and 6, two brake disks 19 and 20 are arranged, which are held in the position shown by a spring 21. The brake disks are held in the direction of the circumferential force of the roller lock by the rod 22 , but can be compressed against the force of the spring 21. The switches 24 and 25 are adjusted by the brake member 20 via a linkage 23. The device works as follows: During normal operation, the force of the spring 1 r is sufficient to hold the drive shaft 1 and the output shaft 12 in the position shown. The rollers 7, S, 9 and 10 hereby retain the position shown in FIG. 2, since the circumferential force is not so great that the force of the spring 11 is overcome. When an increased working pressure occurs, the rollers move on the spiral-shaped curves 15, iü, 17 and 18, whereby the springs are compressed. The wheel bodies 5 and 6 come into engagement with the brake disks 19 and 20 after a certain relative movement with respect to the disks 13 and 14. As a result, the moving masses are intercepted and at the same time the switches 24 and 25 are adjusted as a result of the movement of the brake disks in the axial direction, whereby the drive motor is switched off and further display or control devices come into operation. 3 shows an arrangement in which the brake disks 10 and 20 can not only be adjusted in the radial direction, but are also able to follow the rotary movement of the drive when the valve is opened. The brake disks 19 and 20 are provided with ring gears 2 (> and 2j and are connected to one another via a common pinion 28. The disk 29 firmly connected to the pinion 28 forms, together with the balls 30 and a stationary part 31, a freewheel lock, which allows the pinion to rotate in the direction of arrow 32, but prevents it from rotating in the opposite direction of the arrow. Rollers 33 and 34 are mounted between the disks 19 and 20 and are pressed against the disks by a spring 35. The switching parts 36 and τ, γ S _{0 are} connected to the rollers and come into contact with one another when the brake disks move against the force of the spring 21. During the closing movement, the pinion 2 is rotated in the direction of the arrow 38. If the wheel bodies 5 and i> come into engagement with the brake disks 19 and 20 when an increased working pressure occurs, the sprockets z6 and 27 seek to rotate the pinion 28 and the disk 29 in the opposite direction to the arrow 32. However, this rotation is prevented by the roller lock 29, 30, 31. If, on the other hand, the motor is started again in the opposite direction after the shut-off element has been closed in order to open the shut-off element, the brake disks 19 and 20 can initially be taken along by the wheel bodies, since the overrunning clutch when the pinion moves in the direction of the arrow! ^ 2 is not indented. The axial movement of the brake disks during the operation can be limited by the stops 39 and 40 so that the disks come to rest after they have reached this position. The arrangement shown in the last figure offers advantages in particular when it comes to a completely relieved start of the drive motor, while the arrangement of the brake discs described first is advantageously used when only short run-up paths are available and, as a result, the greatest possible acceleration of the Drive molurs is required. Pa τ ι ·: χ τ λ xsi 'u ü c 11 ε. ι. Drive for valves, gate valves or the like, the drive of which takes place via a locking mechanism consisting of curves and rollers and held in engagement by an energy storage device (spring or the like) by 1 = 0, so that characterized by that. the part of the locking mechanism driven by the motor cannot rotate, but is arranged axially displaceably on the valve spindle and with a likewise axially displaceable brake disc cooperates. 2. Valve drive according to claim r, characterized by the use of two symmetrically arranged roller locks. 3. Valve drive according to claim 2, characterized in that the drive of the two roller locks takes place via a common pinion. 4. Valve drive according to claim r, characterized in that "the axial displacement the brake discs to carry out switching operations, for example to switch off the drive-lu-s. serves. 1 sheet of drawings r.Knni'CKT in dkr unicnsmiracEREt