CN1101967A

CN1101967A - Boost type low-power-consumption safety valve

Info

Publication number: CN1101967A
Application number: CN 93118567
Authority: CN
Inventors: 富良; 富晓鸥; 富晓雪
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-20
Filing date: 1993-10-20
Publication date: 1995-04-26

Abstract

The boost type low-power safety valve suitable for high-flowing-pressure and low-power application, especially household gas stove has two permanent loops, uses dry cell for pulse control and can magnetize fluid to the some extent.

Description

Boost type low-power-consumption safety valve

The present invention relates to a kind of relief valve of electrical pulse control.As a kind of executive component in hydraulic pressure and the air pressure automatic control system, it is specially adapted to fluid stopping power and controls the humble occasion of energy consumption greatly.

The pulse control electromagnetic valve that adopts magnetic to keep can overcome the shortcoming that general solenoid valve needs uninterrupted energising.This respect, Chinese patent has 92209526.4,89101456.X; Another problem is the size that how to reduce this impulsive current.Design the problem of little steering force valve exactly.Japan Patent JP311625/90, JP41632/91 are a kind of designs of adopting mechanical means to substitute pilot valve, so that eliminate the effect of counterpressure.Driving owing to pressing for dryelement cell aspect the safety valve of some home appliances after all, the requirement of low power consumption is very outstanding.Since be relief valve, in the time of the control of certain low power consumption, also must guarantee the leak free requirement of fluid stopping.This problem still remains improved technology.

The object of the present invention is to provide a kind of new design, it is more exquisite to reach safety valve, and eletromagnetic-operating power is very little, and can obtain enough big valve fluid stopping power.

The present invention is achieved in that

1, adopt two permanent magnets, two magnetic circuits are equivalent to the effect of recommending up and down.

2, improve magnetic loop, reduce leakage field.

3, adopt Nd-Fe-B permanent magnetic and frameless construction, greatly really the minor valve volume.

4, utilize relief valve manually to remove the condition of fluid stopping state, utilize back pressure, the way that strengthens spring force and two magnet magnetic force of increasing increases fluid stopping power to greatest extent.

5, the air gap threaded adjustment in closed state and yoke unshakable in one's determination is so that eliminate part machinery foozle, spring force error, the magnetic error of permanent magnet and soft magnetic bodies.Thereby make each solenoid valve characteristic unanimity, reach the optimization state.

Structure of the present invention divides two partly: electromagnet and manual reset mechanism.Electromagnet adopts the I-shaped iron core to do bobbin (insulation processing), its upper end dress bushing, iron core is connected with last magnetic boots by screw thread, between the unshakable in one's determination and last magnetic boots upper spring is housed, upper and lower neodymium iron boron (lower the requirement and can adopt other material) permanent magnet of respectively adorning an axial charging of yoke is processed with magnet isolation tank on the yoke so that further prevent shunt magnetic.Lower magnet is faced magnetic boots down, and O-ring seal is housed on the following magnetic boots, and the iron yoke all can form quite good magnetic loop in fluid stopping and opening state.Last magnetic boots are somes of the housing of electromagnet, compact dimensions.Following magnetic boots are contained on the antimagnetic valve body, and valve body lower portion is equipped with lower spring, push rod, seal ring, cover plate etc. replys parts, below further analyze the reason that obtains big fluid stopping power with little steering force:

Following various in:

The last magnet the suction-combining force of PM1

PS upper spring work elastic force

The PF fluid is to the thrust of yoke front surface

The suction-combining force of PM2 lower magnet

The pulse-electromagnetic force that the PE coil produces

So have:

The condition that yoke can be kept adhesive with last magnetic boots is:

△P≈P _M1-P _S＞0

The condition that yoke is tried hard to recommend out by coil electromagnetism is:

P _E＞△P

Closing force when yoke is inhaled downward magnetic boots is:

P≈P _S+P _M2+P _F

＝P _M1+P _M2+P _F-△P

As seen double magnetic circuit P _M1, P _M2The stack of two power.In other words P _M2Can alleviate P _M1Burden (being equivalent to recommend effect).

Gain between closing force and the coil electromagnetism power is:

K _P＝ (P)/(P _E) ≈ (P _M2+P _S+P _F)/(P _M1-P _S)

If get during design:

P _M1＝1.2P _S

P _M2=1.5P _S(when lower magnet air gap ≈ 0)

P _F＝0.3P _S

P _E＝1.2△P

Then:

K _P＝ (1.5P _S+P _S+0.3P _S)/(1.2(1.2P _S-P _S))

＝ (2.8P _S)/(0.4P _S)

=7 times

The gain of this power is different from mechanical lever and so on power amplifies, and it is that the magnetic air gap variation that triggered by electrical pulse and magnetic force and spring force transform and obtain.

Concrete structure of the present invention is provided by following examples, and accompanying drawing 1 is vertical half sectional view of valve.Wherein:

Coil 1 is on unshakable in one's determination 2, and last magnetic boots 3 and magnet ring 1 all closely cooperate with diamagnetic valve body 8, and upper spring 4 is stage clips and also diamagnetic, and last magnet 16 lower magnets 15 all are connected with yoke 5 and also can slide in valve body.13 pairs of solenoid valves of three seal rings are sealed.But manually press lower push rod 12 Open valves, 9 reset responses of lower spring, lining 10 is pressed on the push rod, and cover plate 11 usefulness spiral shell sealing are fixed.Fluid is by turnover between outlet 14 and the import 6.Winding wire 18 passes from insulator 17.Be connected with flange plate (also available ozzle) between valve and the pipeline.

Should be pointed out that and only keep φ ₁Magnetic circuit, this valve a kind of pulse controlled solenoid valve of still can yet be regarded as.Lower applications can required.

Claims

1, a kind of power gain low power consumption relief valve is made up of coil, spring, yoke, permanent magnet and response agency, it is characterized in that fixing on the yoke 5 and goes up magnet 16 and lower magnet 15, and they produce φ respectively ₁And φ ₂Two magnetic loops.

2, relief valve according to claim 1 is characterized in that having on the yoke 5 magnet isolation tank M.

3, relief valve according to claim 1 is characterized in that, 1 coated isolation layer unshakable in one's determination, and the double bobbin of doing, and the one end is processed with screw thread, is used for doing the magnetic gap adjustment.

4, relief valve according to claim 1 is characterized in that, last magnetic boots be screwed in outside the iron core and the double partly housing of electromagnet of doing with screw thread.