SU1225973A1 - Multipurpose valve - Google Patents

Description

The invention relates to stop and control valves and is intended primarily for use in loading and unloading processes of transport tanks.

The purpose of the invention is to increase the control accuracy by reducing the dynamic non-loading of the valve.

FIG. 1 shows a valve, a general view in section; in fig. 2 is a section A-A in FIG. one.

A cylindrical bore 2 is connected to the valve body 1, communicating with the inlet 3 and the outlet 4 channels, the outlet channel being coaxial with the bore, and the inlet is perpendicular to the outlet. In the bore there is a shut-off body 5, which overlaps the output channel 4, is connected with the rod 6 with the actuator piston 7 and the deflector 8 can be rotated. The valve is provided with a lock of the angular position of the piston in the housing made in the form of a stop 10 of the washer entering the rod 9 mounted on the partition wall 11. A bearing 12 is mounted in the partition wall 11 and is associated with the deflector 8.

On the rod is also made shaped groove 13 with longitudinal and screw sections, and on the deflector installed washer 14 with a protrusion 15 placed in the shaped groove.

The working cavity 16 above porous 7 is in communication with the throttle bore 17 with a cylindrical bore and through the control valve 18 with the outlet channel.

Parallel to the control valve 18, an additional control valve 19 is connected, connected with the working cavity 16 by the channel 20, which is made perpendicular to the piston in the housing and is blocked by the pressure 7 in the intermediate position of the locking member.

In the working cavity 16, a spring 21 is installed, loading the locking member towards closing the channel 4.

The valve operates as follows.

When the valves 18 and 19 are closed, the inlet 3 through the gap between the deflector 8 and the housing 1, as well as through the throttle opening 17, communicates with the working cavity 16. The pressure under and above the piston 17 is equalized, and the locking member 5 blocks the outlet 4 by the action of the spring 21 Providing hermetic flow shut off.

When the control valve 19 is opened, the working cavity 16 communicates with the outlet channel 4, the pressure above the piston 7 becomes less than under the piston, as a result. In this case, the latter moves upward until it closes the channel 20, which communicates with the open valve 19 (Fig. 1).

The position of the channel 20 corresponds to the required reduced flow rate through the shut-off and control valve.

In the process of moving the piston 7, and hence the rod 6 upwards, the latter is fixed from rotation by the stop 10 of the washer entering the longitudinal groove 9. On the other hand, the protrusion of the ring 14, which is included in the figure 0, the groove 13 of the rod 6, provides only a first lift the locking body 5, and then the rotation of the deflector 8, which, opening part of the channel 3, creates a vortex motion of the fluid, which has a large hydraulic resistance.

Significant removal of the closure member 5 from the saddle almost negates the effect of dynamic non-blocking, ensuring the steady state of the shut-off valve in the intermediate position.

When the valve 18 is opened, the piston 7 due to the pressure drop in the working cavity 16 will continue to move upwards to the stop. At the same time, the locking member 5, respectively, will also occupy the extreme upper position, and the deflector 8 will rotate until the channel 3 is completely opened. channels.

If necessary, the pressure-regulating valve can be equipped with several control valves, which allow discrete control of the flow within the required limits.

five

0

five

0

VNIIPI Order 1932/24 Circulation 880 Subscription Fili.l PPP “Patent, Uzhgorod, ul. Project, 4

Claims (1)

SHUT-OFF CONTROL VALVE, in the cylindrical bore of the casing of which a shut-off element is installed that overlaps the outlet channel, connected by a rod to the actuator piston, the inlet channel being perpendicular to the shut-off element and the outlet channel and communicated with the cylindrical bore, the working cavity above the piston is communicated with a throttle bore with a cylindrical bore and through a control valve with an outlet channel, characterized in that, in order to increase the accuracy of regulation, the valve is equipped with a piston angular position lock in the housing in a cylindrical bore of a deflector mounted rotatably in the housing, for rod shaped groove is formed with longitudinal and helical portions and a deflector provided with a lug groove arranged in the figure. (L s Figure 1 N2 N2 SL ss ss