CN2215635Y

CN2215635Y - Pressure differnce-free two-direction electromagnetic valve

Info

Publication number: CN2215635Y
Application number: CN 95205445
Authority: CN
Inventors: 唐振立
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-10
Filing date: 1995-03-10
Publication date: 1995-12-20
Anticipated expiration: 2005-03-10

Abstract

The utility model relates to an electromagnetic valve for the automation control of a system, which is composed of an upper electromagnetic wire bag (valve cover) and a lower valve seat, wherein a valve port is arranged in the valve seat; the center of a valve plug with a movable iron core is provided with a through hole which penetrates up and down; thus, an inlet of the electromagnetic valve, and a valve plug cavity are communicated so that mediums on both ends of the valve plug have the same pressure. The utility model has the advantages of compact structure, simple manufacture and convenient use, and the upward and downward movement of the valve plug is only determined by the suction force of an electromagnet, and spring force, and dose not need to overcome the medium pressure; thus, the work efficiency of the electromagnetic valve can be greatly increased.

Description

Pressure differnce-free two-direction electromagnetic valve

The utility model relates to a kind of solenoid valve that is used for system automation control.

Solenoid valve is the pipe-line system executive component of control automatically, generally is made of top electromagnetic wire bag (valve gap) and lower valve seat two-part.Common solenoid valve can only one-way only operation, and the pressure medium that must rely on that has just can be worked, and its principle is: when electromagnetic wire bag energising back produces suction, overcome spring force and pressure medium (gravity is ignored), realize opening valve or pass valve thereby promote valve plug; Suction is eliminated after electromagnetic wire bag dead electricity, and spring force and pressure medium promote valve plug and then realize closing valve or driving valve.Because the variation in pressure of medium is very big in the valve seat at work, so also very big to the influence of electromagnet suction.

The purpose of this utility model is in order to overcome the influence of prior art structure medium pressure to electromagnet suction, to design a kind of no pressure reduction bidirectional electromagnetic valve with pressure medium balance type structure.

Technical solution of the present utility model is the through hole that has a up/down perforation at the center of conventional electromagnetism valve actuation iron core valve plug both ends of the surface, thereby the outlet (or import) and the valve plug chamber of solenoid valve are communicated with, the suffered pressure medium in two ends is identical at work to make valve plug, moving up and down of valve plug only is decided by electromagnet suction and spring force like this, and irrelevant with pressure medium, so can increase substantially the working efficiency of solenoid valve.

Below with reference to accompanying drawing the utility model structure is described.

Fig. 1 is the structural representation of a specific embodiment of the utility model.

As shown in the figure, this no pressure reduction bidirectional electromagnetic valve is made of valve seat 1 and valve gap 8 two-part.Valve seat 1 is that two ends are provided with the Three way type member that medium inlet/

outlet

11,12 and upper end have the valve plug port, is provided with valve port 13 in pedestal; In valve gap 8 shell walls, be arranged with electromagnetic coil 6, insert the moving iron core 5 that a top is equipped with spring 7 at electromagnetic coil 6 middle parts, the lower end of moving iron core 5 connects is equipped with valve plug 3, the bottom of described valve plug 3 is passed the valve seat upper port and is stretched into in the valve seat 1, have the port 31 of a up/down perforation to moving iron core 5 top end centers from valve plug 3 bottom end central straight, when 3 times backwardnesss of valve plug, its bottom plug face can be with 13 sealings of valve port in the valve seat.In addition, between valve seat upper port and valve plug 3 outer walls, be provided with one or several seal rings 4, in order to guarantee the sealing in valve plug 3 walls and valve seat upper port chamber.In the work, when valve port 13 is in closed condition, the stressed unanimity in two ends up and down of valve plug 3; Behind valve opening, because the inlet/

outlet

11,12 of solenoid valve and valve plug chamber are communicated with, valve plug 3 upper/lower terminals stressed still identical, so moving up or down, valve plug 3 only depends on electromagnet suction and spring force, and it is irrelevant with pressure medium, therefore this solenoid valve product can or not have under the differential pressure conditions and work at medium zero MPa, can be used for the proper functioning of the positive and negative both direction of valve yet.Number in the figure 2 is a sealing gasket; 9 is the valve gap fixed core.

Compact structure of the present utility model, make simply, easy to use, must not overcome pressure medium in the work of electromagnet, make electromagnet volume and power index reduce significantly, thereby can obtain remarkable economic efficiency.

Claims

1, a kind of no pressure reduction bidirectional electromagnetic valve that is used for system automation control, constitute by valve seat (1) and valve gap (8) two-part, described valve seat (1) is that two ends are provided with the logical member of three formulas that medium inlet/outlet (11,12) and upper end have the valve plug port, is provided with valve port (13) in pedestal; Be arranged with electromagnetic coil (6) in described valve gap (8) shell wall, be equipped with spring (7) and lower end on top of insertion, electromagnetic coil (6) middle part the moving iron core (5) of valve plug (3) even is housed, the bottom of valve plug (3) is passed the valve seat upper port and is stretched into in the valve seat (1), when valve plug (3) falls behind down, its bottom plug face can is characterized in that having in valve plug (3) bottom the port (31) of straight-through moving iron core (a 5) top end with valve port in the valve seat (13) sealing.

2, no pressure reduction bidirectional electromagnetic valve as claimed in claim 1 is characterized in that with one or several seal rings (4) valve plug (3) outer wall and valve seat upper port being sealed.