SU1663296A1 - Electromagnetic three-way valve - Google Patents

Abstract

This invention relates to pipe fittings. The aim of the invention is to improve reliability in operation by fixing the closure member in extreme positions. When voltage is applied to the electric drive coil 2, the measles 6 in the form of a permanent magnet with poles at the ends, moves upwards to the magnetic circuit 5 and moves the locking member 19 on the lever 12 to the saddle 17, blocking the passage of the medium. The spring 10 in the telescopic rod 11, removed, goes through the middle position and fixes the measles 6 in the extreme position. 1 il.

Description

This invention relates to pipe fittings.

The purpose of the invention is to increase the reliability of work by fixing the locking member in the extreme positions.

The drawing shows the electromagnetic valve, section.

The three-way valve includes a housing 1 and an electromagnetic actuator in the form of a coil 2, covered with a casing 3, a tightened nut 4. Inside the coil there is a magnetic core 5 and a bore 6, which is a permanent magnet with poles at the ends. The anchor has a groove 7 and a shank with a hole in which a hinge 8 is placed with gaps, connecting the lever 9 with the spring 10 enclosed in a telescopic rod 11 and resting on the support 12 mounted on the element 13. The axis 14 of the lever 9 is fixed in the housing 1, which houses fittings 15, 16 with saddles 17, 18, overlapped by a double-side closure body 19, and

fitting 20. The rod 11 is connected at one end with the hinge 8 and the other with the body at a point perpendicular to the core axis passing through the axis 14. A distance washer 21 is installed to adjust the tension of the spring 10. made in the form of a screw with a lock nut. A washer 22 is installed between the winding 2 and the housing 1. The stroke of the core 6 is limited by stops 23 and 24, made of a soft magnetic material for fixing the core in the extreme positions. In the shank of the core, the inner walls of the hole serve as stops 25 and 26 when the core interacts with the hinge 8. Moreover, in the initial position, there is a gap between the hinge 8 and the stops 25 and 26, both in the upper and lower positions. This gap provides the necessary sealing force to block the seats 17 and 18 by a locking organ 19, and also provides preliminary acceleration of core 6 before interacting with the hinge

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rum 8, which reduces the required drive power and power consumption. In addition, the gap increases the life of the gate and saddles, by preventing shock loads due to the kinetic energy of the core. The power source 27 is equipped with a paired push switch 28.

The valve operates as follows.

In the initial position shown in the drawing, the saddle 17 is blocked and the fittings 16 and 20 communicate with each other. A second starting position is also possible, in which saddle 18 is blocked and fitting 15 communicates with fitting 20. In the starting position shown in the drawing, measles 6 is in the upper position, fixed by the interaction of the north pole of the magnet with a magnetic core 5 . At the same time, on the hinge 8 there is a roller freely rotating on the axis, between which and the abutment 26 there is a gap, which ensures the perception of the force from the spring 10 by the locking member 19, pressing the latter against the saddle 17 and removes the lateral force from the core. In this case, the force exceeds the force of the spring 10 by 5-8 times due to the difference between the lever arms relative to the axis 14, which is influenced by the spring force 10 and the reaction force of the saddle 17. The winding of the coil 2 is de-energized, there is no energy consumption, there is no heat release. If it is necessary to switch the medium, briefly press the switch 28 to the right (left) (according to the drawing) and apply voltage to the winding of coil 2 so that the north pole of the coil is at the top (according to the drawing) while the poles of the same magnet core and electromagnet repel and measur goes down. At the beginning of the movement, the passage gap, measles gains speed, and when interacting with the hinge 8 moves it, compressing the spring 10 in the telescopic rod 11. The subsequent movement of the core occurs without load and even with the aiding fixing action of the spring 10.

At the end of the stroke, the measles move independently, and the hinge 8 stops. At the end of the stroke, the measles hits the support 24, which is made of magnetically soft material. Emphasis 24, magnetizing holds the measles

in the lower position, maintain the gap between the hinge 8 and the stop 25. After actuation, the winding 2 de-energizes, and the locking member 19, pressed against the saddle 18, closes the saddle with a force 5-8 times greater than

spring force 10 and an order of magnitude greater than the force needed by the core to open the seat. Subsequent operation is triggered by briefly pressing the switch 28 - by applying a voltage pulse.

coil 2 with reverse polarity.

Claims (1)

Claims of the invention A three-way valve with an electromagnetic drive, comprising a body with two saddles, between which is a two-way shut-off element located on. swing lever, one end fixed to the axis in the housing, and the other through a hinge connected to the bark of an electromagnetic actuator, characterized in that, in order to increase reliability in operation by fixing the locking member to the extreme positions, the valve is provided with a spring installed in a telescopic rod, one end of said rod is connected to the hinge on the bark of the electromagnetic actuator, and the other with the case on the normal to the axis of the core passing through the middle of the stroke of the locking organ, the measles being made in the form of a permanent magnet, and the case made of a magnetically soft material. 1812  g & - 25 26 11 2i