CN2189672Y

CN2189672Y - Vacuum electromagnetic valve

Info

Publication number: CN2189672Y
Application number: CN 94213667
Authority: CN
Inventors: 王运联
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-08
Filing date: 1994-06-08
Publication date: 1995-02-15
Anticipated expiration: 2004-06-08

Abstract

The utility model discloses a vacuum electromagnetic valve, which is composed of a valve body, a lower valve core, an upper valve core, an upper valve core reset spring, a fixed iron core, and an electromagnetic coil, wherein, the lower valve core is movably matched with the wall of a valve cavity, and the lower valve core is not only provided with an upper valve seat and a gas passage which is communicated with an upper valve cavity and a lower valve cavity, but also provided with a magneticring. When the lower valve seat is opened, the lower valve core can keep the upward floating state under the action of the magnetic attraction force generated between the magnetic ring and the valve core; therefor, the pressure in the vacuum device can be the same with external pressure in a short time, and the vacuum dgree in the vacuum device can be thoroughly eliminated.

Description

Vacuum electromagnetic valve

The utility model relates to a kind of vacuum solenoid that can control vacuum equipment aeration process.

The vital part of vacuum solenoid is to be divided into the lower valve core of uuper valve chamber and lower valve chamber movingly and with valve pocket with valve cavity wall, the air vent that this lower valve core is provided with upper valve base and links up the thin footpath of upper and lower valve pocket, and upper valve core is exactly the moving iron core in the electromagnetic controller.When upper valve core is sucted by the fixed core in the electromagnetic controller, after upper valve base is opened, lower valve core is promptly last, the effect float downward of lower valve chamber pressure reduction, at this moment, lower valve base is opened, upper valve base is closed once more, gas directly enters vacuum equipment through lower valve chamber and lower valve base, uuper valve chamber is then by air vent supercharging gradually, and when uuper valve chamber acts on pressure on the lower valve core when adding that the gravity of lower valve core is a bit larger tham lower valve chamber and acts on the pressure of lower valve core, lower valve core is promptly closed lower valve base automatically, at this moment, upper valve base is opened again, and gas changes by lower valve chamber through air vent, uuper valve chamber, upper valve base enters vacuum equipment, because the latus rectum of air vent is very little, the aeration process will continue the long period, if close upper valve base this moment immediately, so, the degree of vacuum in the vacuum equipment just can thoroughly not eliminated.Two subject matters that this known just vacuum solenoid exists.

The purpose of this utility model provides a kind of degree of vacuum that can thoroughly eliminate in the vacuum equipment, and aeration process vacuum solenoid rapidly.

Main points of the present utility model are that the circumference of lower valve core upper edge upper valve base is provided with magnet ring.

Illustrate particular content of the present utility model below in conjunction with drawings and Examples.

Accompanying drawing is a structural drawing of the present utility model.

Vacuum solenoid is by valve body 1, lower valve core 2, upper valve core 3, upper valve core Returnning spring 4, fixed core 5 and electromagnetic coil 6 are formed, wherein be provided with lower valve base 7 in the valve body 1, intake duct 8 and valve pocket, lower valve core 2 is divided into uuper valve chamber 9 and lower valve chamber 10 movingly and with valve pocket with valve cavity wall, and air vent 12 and lower valve base seal ring 13 that lower valve core 2 is provided with upper valve base 11 and links up the thin footpath of uuper valve chamber 9 and lower valve chamber 10, feature of the present utility model is that the circumference at lower valve core 2 upper edge upper valve bases 11 further is provided with magnet ring 14, this magnet ring 14 is inlaid on the lower valve base 2, last plane is facing to the bottom surface of upper valve core 3, upper valve core 3 is sleeved in the iron core guide hole 15, constitute electromagnetic controller with the fixed core 5 that is fixed in the iron core guide hole 15 together with the electromagnetic coil 6 that is sleeved on iron core guide hole 15 outsides, in addition, the bottom surface of upper valve core 3 is setting-in upper valve base sealing gasket 16 also, is provided with speed below the lower valve base 7 to connect screw thread 17.

The vacuum solenoid of said structure floats at lower valve core, upper valve base is once more under the closing state, lower valve core also is subjected to the effect of magnet ring with the magnetic attraction that is produced between the upper valve core, this magnetic attraction had both made the come-up state that also is enough to keep lower valve core under being pressurized to the condition of lower valve chamber equipressure at uuper valve chamber, therefore just can guarantee the pressure in the vacuum equipment is reached with the external pressure equipressure, so also just thoroughly eliminate the degree of vacuum in the vacuum equipment.

Claims

1, a kind of vacuum solenoid of forming by valve body, lower valve core, upper valve core, upper valve core Returnning spring, fixed core and electromagnetic coil, lower valve core is divided into uuper valve chamber and lower valve chamber movingly and with valve pocket with the valve cavity wall in the valve body, lower valve core is provided with upper valve base and links up the air vent of uuper valve chamber and lower valve chamber, and it is characterized in that: the circumference of lower valve core (2) upper edge upper valve base (11) also is provided with magnet ring (14).