CN2207484Y

CN2207484Y - Self-protecting energy saving electromagnetic valve

Info

Publication number: CN2207484Y
Application number: CN 94211235
Authority: CN
Inventors: 汪云; 刘宝英
Original assignee: Institute of Automation of Chinese Academy of Science
Current assignee: Institute of Automation of Chinese Academy of Science
Priority date: 1994-05-18
Filing date: 1994-05-18
Publication date: 1995-09-13
Anticipated expiration: 2004-05-18

Abstract

The utility model discloses a self-protecting energy saving electromagnetic valve, comprising a permanent magnet, a control coil, a spring, a valve, a valve seat, and a supporting ring. Compared with the traditional differential polarization electromagnetic valve, the utility model has the advantages of simple structure, convenient adjustment, low cost, and reliable work; the utility model can be used for the automatic switching control for the gas consumption of the household gas supply pipeline.

Description

Self-protecting energy saving electromagnetic valve

The utility model belongs to the polarized type solenoid valve.

Need energising just can be held open state in original normally closed solenoid valve control coil.Original differential type polarity electromagnetic valve is complicated because of structure, and assembling is adjusted inconvenient, and manufacture cost is higher, is unfavorable for promoting the use of.

The present invention seeks to no longer to produce any power consumption in order to make the cut-off type normally closed solenoid valve under the effect of positive negative pulse stuffing voltage, correspondingly remain on unlatching (or closing) state respectively.

Technological points of the present utility model is: if there is not permanent magnet (1), be exactly a common normally closed solenoid valve shown in the accompanying drawing.Control coil, forms magnetic force, overcomes spring force and the poppet valve Open valve just produce magnetic flux in working gas gap as connecting power supply.During the coil no electric circuit, spring force will make the sealing surface pressure of valve get lodged in valve seat (7) and go up and Shuttoff Valve the circulation of blocking-up working medium.

The utility model is introduced permanent magnet (1), has just thoroughly changed the drive performance of above-mentioned solenoid valve.

Permanent magnet produces polar flux from bottom to top in working gas gap, the size of magnetic flux inverse ratio what working gas gap.Valve closed condition working gas gap maximum, polar flux suction is less than spring force.If the control magnetic flux that produces by forward current in the coil is identical with the polar flux direction, then suction increase, overcomes spring force and open valve.Working gas gap was zero when valve was opened, polar flux increases to maximum, and polar flux suction is greater than spring force, and this seasonal control coil control magnetic flux that opens circuit is zero still can make valve remain on opening state.Then produce the control magnetic flux opposite with the polar flux direction if pass to back current in the coil, both will cancel out each other, and spring force certainly will be pressed to valve seat with valve, makes valve remain on closed condition.

Advantage of the present utility model:

1. compare with common normally closed solenoid valve owing to exist the polar flux cut-in voltage can reduce by 50% in the working gas gap, and be the energy saving product because of having self-retaining function.

2. compare with existing differential type polarity electromagnetic valve, structure is very simple, and is easy to adjust, thereby cheap for manufacturing cost, helps large-scale popularization and uses.

Description of drawings: structure principle chart of the present utility model

1--permanent magnet 2--iron yoke

3--control coil 4--ends seat

5--spring 6--valve

7--valve seat 8--filler ring

Embodiment:

The utility model can be used for the control of resident's domestic gas rationing, and control gear comprises flowmeter, microprocessor and self-insurance energy-saving electromagnetic valve, and the latter is an actuator, and it carries out work according to microprocessor instruction.Open command is a positive pulse voltage, acts on control coil (3), produces the control magnetic flux identical with the polar flux direction, and suction increases, and overcomes the elastic force of spring (5), poppet valve (6), Open valve.In case the flux cumulating use value has reached forward purchasing quantity, microprocessor sends out code immediately, out code is a negative pulse voltage, act on control coil (3), produce the control magnetic flux opposite with the polar flux direction, both gradually offset, and spring (5) is taken advantage of a favourable situation valve (6) is pressed to valve seat (7), blocking-up pipeline internal combustion air communication.

No.5 cell capacity minimum is 270mAH at present, and the utility model control impuls is 175mA * 0.04mS, establishes switch motion every day 20 times, and battery life is 19 years, this shows that the utility model energy-saving effect is fairly obvious.

Claims

1, a kind of polarity electromagnetic valve of being made up of permanent magnet, control coil, spring, valve, valve seat, filler ring is characterized in that:

A. in a complete normally closed or normally open solenoid valve, a permanent magnet is housed;

B. the shape of permanent magnet can be that ring-type, fan-shaped or bar shaped, permanent magnet can be in parallel with the control flux circuit or connect;

C. control coil can be one but the control corresponding voltage pulse must have positive-negative polarity;

D. control coil can be two but the coiling direction is opposite, and the control voltage pulse does not have positive-negative polarity.