SU1668798A1 - Electromagnet valve with manual doubler - Google Patents

Abstract

Invention m. used in electrohydraulic amplifiers for automatic control of their operation. The purpose of the invention is to increase the reliability of the electromagnetic valve by increasing the information content of valve actuation using a hand-held doubler. In case 1, an electromagnet 2 with a bark 3 is placed. a pusher 8 with a cylindrical collar located in the bore of the core 3 opposite the collar of the rod 9 and loaded with its spring 7. By installing the pusher 8, the stroke of the button 14 is increased. 3 sludge.

Description

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The invention relates to automation and can be used in electrohydraulic amplifiers for automatic control of their operation.

The aim of the invention is to improve the reliability of the valve by informing the valve response with the help of a hand-held doubler.

FIG. 1 shows the valve design in the open position; figure 2 - the same in the closed position when exposed to an electromagnet; fig.Z - the same, when exposed to a manual backup.

In case 1, an electromagnet 2 is placed with a bark 3 made in the form of a sleeve with an internal bore forming the bottom 4. The other bottom 5 of core 3 is formed by a sleeve 6 rigidly fixed to the bark. In the bottom 5 and 4, respectively, spring opposite each other using the spring 7, the pusher 8 and the control rod 9, which acts on the normally open valve body 10, by opening or closing the drain hole 11 of the valve. The housing 1 is closed by an airtight lid 12, in which, through the sealing assembly 13, a button 14 of a handwheel is mounted coaxially with the rod 9, between the shoulder of which and the housing 1 a spring 15 is installed.

The valve operates as follows.

In the initial position, the valve is open and the locking member 10 is in a free state between the valve seat and the end face of the control rod 9.

When a voltage is applied to the electromagnet 2 under the action of magnetic force, the measles, and with it the rod 9 and the pusher 8, move upwards. Since the gap between the core in the lowest position and the body is chosen somewhat larger than the core stroke until the locking member stops in the saddle, upon further movement of the core, the spring 7 begins to compress, thereby clamping the locking member to the saddle with the necessary calculated force , blocking the drain hole 11. The valve is closed. After

switching off the electromagnet 2 measles, together with the rod, returns to its original position under the action of the working fluid.

To close the drain hole 11

when de-energized electromagnet 2 during routine maintenance or in an emergency, press the button 14 of the handwheel with a special key, while moving the spring 15 up and compressing it,

rests on the pusher 8, and through it the spring 7, moves up the control rod 9 and the measles 3 until the valve body is not in the saddle and blocks the opening 11. After that, it begins to compress

spring 7, thereby creating the necessary downforce. This occurs as long as the key is not with children on the stop (figure 2). When the force is removed from the key, the pusher 8 and the rod 9 are returned to their original position by the action of the spring 15.

Introduction to the design of the pusher 8 is caused by operational requirements, namely, an artificial increase in the stroke of the back button by compressing the spring 7 by the pusher 8 when pressing the button 14, because otherwise, for example, when pressing the back button by pressing the back button the magnitude of the working stroke of the core (0.5-1 mm) is very difficult to feel with a hand, the gap is selected or not, and consequently, the valve is closed or not.

Claims (1)

The invention of the solenoid valve with manual a doubler, comprising a housing, a normally open locking body, a rod acting on it, a cylindrical collar of which is placed in the bore of the electromagnet core and is loaded with a spring, and a button a handwheel located coaxially with said rod and loaded in the opposite direction from an auxiliary spring, characterized in that, in order to increase reliability work, between the rod and the button is installed a pusher with a cylindrical collar located in the bore of the core opposite the collar of the stem and loaded with its spring. 13 15 FIG. 2 eleven YU