Solenoid valve

Abstract

The invention discloses a solenoid valve. The technical scheme is as follows: a magnetic core, a valve needle seat and a valve needle are arranged in a center hole of a coil skeleton; a spring is arranged between the valve needle seat and valve needle; the front end of a shell is provided with a guide post of a guide hole; one end of the valve needle is matched with the valve needle seat, and the other end is arranged outside the shell after penetrating through the guide hole; a metal sleeve is sheathed on the valve needle seat; one end of the metal sleeve extends backwards and abuts against the magnetic core; a first seal ring is arranged between the metal sleeve and magnetic core; the other end of the metal sleeve extends forwards and abuts against the guide post; a second seal ring is arranged between the metal sleeve and guide post; the first seal ring and second seal ring are installed through a metal ring, thereby preventing the first seal ring and second seal ring from directly contacting the coil skeleton; and even if plastic deformation occurs to the coil skeleton in a high-temperature environment, the metal ring can still keep the original shape, so that the first seal ring and second seal ring can still perform the effective sealing function.

Description

technical field [0001] The invention relates to the field of electromagnetically controlled industrial equipment, more specifically, it relates to an electromagnetic valve. Background technique [0002] There is a closed cavity in the solenoid valve, and there are through holes in different positions. Each hole is connected to a different oil pipe. There is a piston in the middle of the cavity, and two electromagnets on both sides. On the other hand, different oil discharge holes are opened or closed by controlling the movement of the valve body, while the oil inlet hole is normally open, the hydraulic oil will enter different oil discharge pipes, and then the piston of the cylinder is pushed by the pressure of the oil, and the piston again Drive the piston rod, and the piston rod drives the mechanical device. [0003] In order to prevent the solenoid valve from leaking, it is necessary to install a sealing ring in the solenoid valve. Most of the sealing ring is installed b...

AI Technical Summary

Problems solved by technology

[0003] In order to prevent the solenoid valve from leaking, it is necessary to install a sealing ring in the solenoid valve. Most of the sealing ring is installed between the coil frame and the magnetic core. The coil frame is wound with an electromagnetic coil. Heat is generated, and the coil bobbin is usually made of plastic, which makes the plastic deformation of the coil bobbin in a high-temperature environment, and the sealing ring set on the coil bobbin cannot perform a good sealing effect, and there is a risk of oil leakage

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