RU137589U1 - ELECTROMAGNETIC ACTUATOR LATCH - Google Patents

Abstract

A valve with an electromagnetic actuator containing a rod, which is connected via a T-shaped connection to a wedge that can translate along the internal grooves of the housing, characterized in that the upper part of the rod, which provides translational movement, has a cavity with a spring and is made in the form of a core placed inside the coil of the solenoid.

Description

The field of application of valves with electromagnetic actuators is hydraulic and pneumatic equipment in various fields of the national economy. Gate valves are the most common type of pipe fittings. Wedge gate valves are locking devices in which the passage closes when the locking element is moved forward in a direction perpendicular to the direction of flow of the transported medium. The purpose of wedge gate valves is to shut off the flow of gaseous or liquid media in pipelines with different pressures and conditional (nominal) passages. A wedge gate valve is used on a horizontal pipeline. Gate valves must comply with the specifications [1].

There are various versions of valves, with a manual actuator and with an electric motor [2]. In an electric valve, an electric motor is used to translate the rod. The electric motor is connected to the supporting housing by means of a coupling, and the supporting housing is connected to the screw spindle by means of a yoke nut, the drive further comprises a handwheel kinematically connected to the flywheel and the supporting housing, and is also rigidly connected to the electric motor and the supporting housing by means of flange connections.

However, this design, the use of an electric drive, does not allow you to quickly close the valve in the event of an emergency.

For quick closing, a solenoid valve can be used, patent [3]. It includes a housing, inlet and outlet nozzles, a seat, a core and an anchor of an electromagnet, a piston located in a housing, a locking member located in the piston, a spring, a rod, one end of which is connected to a locking member, and the other end is connected to an electromagnet armature while the anchor has the possibility of axial movement, the core and the armature of the electromagnet are installed in the guide cylinder, while a pneumatic braking chamber is formed between the core and the armature.

However, the valves are limited in diameter. With large pipe cross-sections, the load increases, and accordingly, difficulties arise when installing and securing shut-off valves. Also, the presence of stagnant zones in most designs, in which mechanical impurities accumulate from the working medium, sludge, which leads to the intensification of corrosion processes in the valve body.

The technical result of the claimed device is to provide faster closure of the valve, which can reduce the dire consequences in emergency situations, and also make the valves more economical due to a simpler design.

A technical result is achieved by the fact that the upper part of the rod, which carries out translational motion, has a cavity with a spring and is made in the form of a core placed inside the solenoid coil.

The valve with an electromagnetic actuator consists of the following main components and parts shown in Fig 1:

- housing 1, through which the working medium is transported (steam, water, gas, etc.);

- a locking element that serves to block the passage for the medium flow, having a wedge 2, bearing plates 3, which provide for the overlapping of the valve cross-section

- a rod 4 having in the upper part a cavity 11 with a spring 7, which, through a T-shaped connection 9, interacts with the wedge 2, making translational motion in a vertical plane, thereby raising and lowering the wedge 2 with plates 3;

- electromagnetic coil 5, the electrical part of the drive, consisting of a reel with a wound insulated copper wire, creating a magnetic flux when voltage is applied to the electrical network. The core 6 is a rod made of soft magnetic stainless steel, moving under the action of magnetic forces (fields of an electromagnetic coil), is placed inside the closed tube 10 of the electromagnetic coil 5 - this is necessary for the tightness of the valve with an electromagnetic actuator. In the absence of a supply voltage on the electromagnetic coil 5, the wedge 2 is in its lowest position, it is pressed using the closing spring 7.

- a shielding coil 8, a ring (usually copper) mounted on the open top of the core 6 to limit the vibrations of the core 6 in the case of an alternating current supply to the electromagnetic coil 5.

When applying voltage to the electromagnetic coil 5, the rod 4 with the wedge 2 is in its highest position. The flow of fluid freely passes through an opening in the housing 1. In order to quickly close the valve, a translational electric drive (solenoid) is used. It is simple in design, made of a ferromagnetic core 6 and an electromagnetic coil 5.

The valve with an electromagnetic actuator works as follows: an electric voltage is applied to the electromagnetic coil 5, after which the magnetic core 6 is drawn into the solenoid, the rod 4 rises, which leads to the opening of the valve. The core 6 is placed inside the closed tube 10 of the electromagnetic coil 5. As soon as there is a need to block the flow, the voltage is turned off, and the magnetic core 6 is pulled down from the solenoid, the rod 4 is lowered.

List of references

1. TU 3741-001-83789628-2011

2. Patent RU 2132990, published: 07/10/1999

3. Patent RU 2477408, published: 03/10/2013

Claims (1)

A valve with an electromagnetic actuator containing a rod, which is connected via a T-shaped connection to a wedge that can translate along the internal grooves of the housing, characterized in that the upper part of the rod, which provides translational movement, has a cavity with a spring and is made in the form of a core placed inside the coil of the solenoid.

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