SU366303A1 - THROTTIC DEVICE FOR LIQUID - Google Patents

Description

one

This device can be used in engineering to control fluid flow.

Known throttle control devices with hydraulic drive.

In order to simplify the design and facilitate the remote control, the needle is spring-loaded towards the closure. In the cylinder there are two pairs of holes with different diameters, which communicate the working cavities of the cylinder through non-return valves with the inlet cavity, and through solenoid valves - with the drain pipe.

The drawing shows the proposed throttle device.

In the housing / there is a mounting surface for the NEEDLE 2. The needle 2 has a hole di and a sealing ring 3. A piston 4 with a sealing ring 5 is screwed into the needle 2. The cylinder 6 with a seal 7 has two inlets through the piston rod through which the working liquid in tube 8.

When fluid is supplied to the openings, check valves 9 are installed, which can pass the fluid only to cylinder 6. In the upper part of cylinder 6 there are openings dz connecting the cavities A and B through the compact solenoid valves 10 and // with a drainage pipe.

The diameter of the holes d is larger than d so that if the liquid enters the holes d under greater pressure, it leaves the holes with a much lower pressure.

The cylinder 6 is hermetically sealed with a cover 12. In the initial position, the needle 2 is pressed against the saddle of the housing by a spring 13.

Fluid under pressure through the hole d} falls into the cavity B, creating pressure on

the end of the needle 2. At the same time, the fluid on the tube 8 passes through the holes in the cavities A and B of the cylinder 6. After displacing the air from the cylinder, the fluid passes through the electro-valves 10 and // begins to flow into the drainage tube.

If it is required to open the throttle device, then it is necessary to apply a voltage to the solenoid valve 10. The solenoid valve will close, the fluid passing through the cavity A will turn, and the pressure in this cavity will be equal to the pressure at the inlet to the throttle device. The pressure in cavity B will be significantly less than in the cavity, L due to the passage through it of liquid, entering through holes of dz of smaller diameter and leaving through holes of da of larger diameter. Due to the pressure difference at the ends of the piston 4, it will begin to move with the needle 2 to the right. If you need to firmly install the needle 2

in any intermediate position then

power should be applied simultaneously to the solenoid valves W and 11. At the same time, both valves will close, closing tightly the liquid in the cavity L and.

To move the needle to the left (to close), it is necessary to apply a voltage to the solenoid valve. Pr: this will stop the flow of fluid through cavity B, the pressure in yen is equal to the pressure at the inlet to the throttle device, and due to the pressure difference on the ends of the piston 4, it will move to the left together with the needle 2.

With the proposed device uses the energy of the working fluid itself, and the movement of the device is performed remotely

with the HELP on or off the solenoid valves.

Subject and reference

A liquid throttle device with a cylinder and a piston rigidly connected to the needle in the housing, characterized in that, in order to simplify the design and facilitate remote control, the needle is spring-loaded towards the closing, and in the cylinder there are two pairs of holes with different diameters, communicating the working cavity of the cylinder through the check valves with the input cavity, and through the solenoid valves - with the drainage pipe.