CN2446338Y

CN2446338Y - Electromagnetic valve

Info

Publication number: CN2446338Y
Application number: CN 00253858
Authority: CN
Inventors: 陈健三
Original assignee: Longmen Science & Technology Co Ltd
Current assignee: Longmen Science & Technology Co Ltd
Priority date: 2000-10-10
Filing date: 2000-10-10
Publication date: 2001-09-05
Anticipated expiration: 2010-10-10

Abstract

The utility model relates to an electromagnetic valve, which is composed of an electromagnetic part and a valve seat, wherein, the electromagnetic part comprises a magnetic conduction frame and a spool, of which the inside is wound with an induction coil. The inside of a central tube of the spool is orderly provided with a permanent magnet, a fixed core and a movable core from top to bottom, wherein, the fixed core is positioned at the most area of the spool wound with the induction coil; the inside of the movable core is provided with a return spring and a valve disc. The top end of the return spring is butted against the bottom of the fixed core, and the position on the spool which is not wound with the induction coil and corresponds to the movable core is sheathed with a concentrating flux sleeve. Because the length of the fixed core is longer than that of the movable core, a tube wall of the spool is thin, and the utility model has the advantages of high flux efficiency, light weight and small size.

Description

Solenoid valve

The utility model relates to a kind of solenoid valve.

General solenoid valve is to utilize electromagnetic effect to produce mechanical motion, makes the operation valve block leave or block valve seat and the conducting and the shutoff of controlled water flow.With regard to its operating current and manner of execution, solenoid valve can be divided into AC type and once-through type solenoid valve; The AC type solenoid valve is to utilize permeability magnetic material is continued to pass to electric current, produces suction and allows valve block break away from or block valve seat, causes passing through or turn-offing of fluid; When current vanishes, under the effect of former energy storage device (being generally spring assembly), valve block can be returned to the preceding state of not action.The once-through type solenoid valve then is by a built-in permanent magnet, increases the Magnetic flux density of two magnetic substances when passing to electric current, makes its mutually absorption and cause valve block to break away from or block valve seat; When current vanishes, then two magnetic substances are maintained last operating state by permanent magnet magnetic force.Because DC electromagnetic valve is to lead to an electric current in the moment of beginning of using or end can operate, the centre need not continue energising, so compare with the AC type solenoid valve that all must continue energising in whole course of action, it is comparatively power saving obviously; Therefore, the once-through type solenoid valve is suitable for use in area remote, that incapable persons look after.

Fig. 1, Fig. 2 are the structural drawing of once-through type solenoid valve, and it comprises that one can produce the electromagnetism portion 1 and a valve seat 2 of electromagnetic effect; Electromagnetism portion 1 is installed on the valve seat 2 whether direct fluid pass through; Electromagnetism portion 1 is equiped with the roll 11 of a hollow in a magnetic conduction frame 10, the periphery of roll 11 is wound with inductor coil 12, and below roll 11, be equipped with magnetic guiding loop 13 and permanent magnet 14 respectively, and from top to bottom be equiped with fixedly the stamen heart 15 and a movable stamen heart 16 in regular turn in roll 11 inboards, wherein be built-in with a return spring 17, then be provided with a valve disc 18 in the bottom of the movable stamen heart 16 at the top of the movable stamen heart 16; When the solenoid valve of said structure moves, 12 places pass to forward current in a flash at inductor coil, make the movable stamen heart 16 overcome the tension force of return spring 17 towards the fixedly stamen heart 15 places absorption, and lift off a seat 2 pipe head piece 20 of the valve disc 18 that makes its bottom, fluid is flowed out from exporting 22 by pipe head piece 20 by inlet 21; On the contrary, 12 places pass to back current in a flash at inductor coil, then make the movable stamen heart 16 from the fixedly stamen heart 15 places disengaging, and by return spring 17 it are turned down and to move, make the valve disc 18 of its bottom block the pipe head piece 20 of valve seat 2 once more, and make fluid flow out from pipe head piece 20; After the above-mentioned movable stamen heart 16 up is adsorbed on fixedly the stamen heart 15 and interruptive current, distribute and the otherness of the magnetic permeability of magnetic conduction substance concerns by permanent magnet 14 magnetic lines of force, return spring 17 can't be backed down by the permanent magnet 14 fixed movable stamen hearts 16 firmly, make the movable stamen heart 16 be a kind of absorption of memory type; Similarly, when the movable stamen heart 16 by behind the places of turning down also because return spring 17 and permanent magnet 14 make the movable stamen heart 16 maintain final operating position after outage, this also is the once-through type solenoid valve of aforementioned indication only needs pass to immediate current when action a reason.

Though the once-through type solenoid valve of commonly using has aforesaid economize on electricity and the many advantages of access times, but still has following shortcoming:

One, roll 11 must be located thick than other at the tube wall that twines inductor coil 12 places, with the interior stress under compression after 12 windings of opposing inductor coil, but relatively, because this roll 11 fortunately is again the placement and the active region of the movable stamen heart 16 in corresponding to inductor coil 12 windings place, therefore tube wall suitably attenuation again, make enough gaps of the movable stamen heart 16 activities with formation, but so in the anti-bundle that has weakened this part virtually intensity that contracts, and make the once-through type solenoid valve can take place in use for some time roll 11 because of in contract and clamp the movable stamen heart 16, so that the situation that can't operate; Though this kind situation can be avoided by the wall thickness that increases roll 11, because of roll 11 is a non-magnetic conduction substance, blocked up tube wall can hinder the extension of the magnetic line of force again and make the magnetic flux deterioration of efficiency, and then influence the location of the activity stamen heart 16 after outage.

Two, because the action of solenoid valve is to remove to adsorb the fixing stamen heart 15 or reach or the purpose of fluid stopping body from the fixing stamen heart 15 places disengaging by moving the movable stamen heart 16, so the volume of the movable stamen heart 16 and the action power hungry that weight has influenced this solenoid valve, and the volume of the above-mentioned movable stamen heart of commonly using 16 is more than the fixing stamen heart 15 big and weight also heavier relatively (about 13 g), no matter be adsorbed on the fixing stamen heart 15 or fixedly to break away from the electric power of required consumption all higher at the stamen heart 15 places certainly so its logical magnetic made, the permanent magnet 14 as location usefulness has also increased its volume because of the bigger suction of need jointly.

In view of the foregoing, the purpose of this utility model provide that a kind of volume is little, in light weight, the solenoid valve of the thin and magnetic flux excellent in efficiency of roll tube wall in the solenoid valve.

For achieving the above object, the utility model adopts following design proposal: a kind of solenoid valve is made of electromagnetism portion and valve seat, electromagnetism portion includes the magnetic conduction frame and the inner roll that is wound with inductor coil of an outside, in the center tube of roll, from top to bottom be equiped with permanent magnet in regular turn, fixedly the stamen heart and the movable stamen heart, fixedly the stamen heart is positioned at the overwhelming majority zone that roll twines inductor coil, and the more movable stamen heart of its length is long, in addition, be separately installed with a return spring and valve disc at the intracardiac center position of this activity stamen, and the top that makes return spring supports and to be located at the fixedly bottom of the stamen heart, do not twine inductor coil and correspondence is arranged with a concentrating flux sleeve in the position of the movable stamen heart at roll;

The utility model fixedly more movable stamen heart of length of the stamen heart is long, its length ratio is about 3: 2, and is positioned at the roll that the overwhelming majority is wound with inductor coil, and is auxiliary so that the roll necessary strength to be provided, make the tube wall of roll be able to attenuation, and therefore obtain good magnetic flux efficient.

Because the movable stamen heart of the utility model relatively makes its volume shortening because of fixing stamen heart length growth, and then alleviated weight, the movable stamen heart is lowered at the electric current of action time institute's conducting, increased the access times of solenoid valve under stationary electric stores virtually, and can activate solenoid valve with lower-wattage;

The movable stamen heart of the utility model is provided with the position and only accounts for the sub-fraction that roll twines inductor coil, though because of the gap skiving of having reserved movable usefulness the wall thickness of roll, also can under the support of the fixing stamen heart, be avoided the effect that contracts in the roll generation;

The movable stamen heart after the utility model reduced volume also can lower relatively keeping the required magnetic force of its fixed-site after outage after the weight saving, so the volume of permanent magnet also can dwindle relatively;

The utility model concentrating flux sleeve envelopes the movable stamen heart in large area, therefore good magnetic flux efficient is provided and has lowered, made permanent magnet after reduced volume, still can the magnetic line of force be transferred to the movable stamen heart effectively via concentrating flux sleeve because of roll thickness of pipe wall and the movable stamen magnetic resistance that moving gap causes of being indecisive and changeable.

Further specify below in conjunction with accompanying drawing.

Fig. 1 is a stereogram of commonly using solenoid valve.

Fig. 2 is a front sectional structure chart of commonly using solenoid valve.

Fig. 3 is the front sectional structure chart of the utility model closed condition.

Fig. 4 is the front sectional structure chart of the utility model opening state.

As shown in Figure 3, the utility model provides a kind of solenoid valve, and this solenoid valve is made of electromagnetism portion 1 and valve seat 2; Electromagnetism portion 1 includes the magnetic conduction frame 10 and the inner roll 3 that is wound with inductor coil 12 of an outside, in the center tube of roll 3, from top to bottom be equiped with permanent magnet 4, fixedly the stamen heart 5 and the movable stamen heart 6 in regular turn, fixedly the stamen heart 5 is positioned at the overwhelming majority zone that roll 3 twines inductor coil 12, and the more movable stamen heart 6 of its length is for long, this length ratio is about 3: 2 in the present embodiment, relatively, because of the movable stamen heart 6 volume-diminished also and then alleviate its weight, and the top of this permanent magnet 4 is adsorbed on the top board base of magnetic conduction frame 10.

The center position of the utility model in this activity stamen heart 6 is separately installed with a return spring 7 and valve disc 8, and the top that makes return spring 7 is supported and to be located at the fixedly bottom of the stamen heart 5, its bottom then is resisted against on the valve disc 8, and valve disc 8 shelters from the pipe head piece 20 of valve seat 2, does not twine inductor coil 12 and the corresponding concentrating flux sleeve 9 that is arranged with in the position of the movable stamen heart 6 at roll 3.

Please continue with reference to shown in the 4th figure, during this solenoid valve action, 12 places pass to forward current in a flash at inductor coil, make the movable stamen heart 6 be inhaled the past fixedly

stamen heart

5,2 the pipe the head piece 20 and valve disc 8 that makes the movable stamen heart 6 bottoms is lifted off a seat, make fluid be able to flow out from exporting 22 through pipe head piece 20 by the inlet 21 of valve seat 2, and inhaled toward the fixing stamen heart 5 and after cutting off the electricity supply at the movable stamen heart 6, promptly by the magnetic line of force diffusion principle of permanent magnet 4, the order fixedly magnetic force that produced of the stamen heart 5 and concentrating flux sleeve 9 overcomes the tension force of return spring 7, make the movable stamen heart 6 temporarily be adsorbed on the fixedly stamen heart 5, the state that causes solenoid valve often to open.

Please continue with reference to shown in the 3rd figure, when inductor coil 12 places pass to moment during back current, can be with the movable stamen heart 6 from the fixedly stamen heart 5 places disengaging, make valve disc 8 shelter from pipe head piece 20 again, to block passing through of fluid, the movable stamen heart 6 is no longer sucked back the fixedly stamen heart 5 places by permanent magnet 4 under the tension force effect of return spring 7 simultaneously, and allows solenoid valve often remain on closed condition.

From said structure as can be known, the utlity model has following advantage:

One, because fixedly the more movable stamen heart of the length of the stamen heart 56 is long, and is positioned at the roll 3 that the overwhelming majority is wound with inductor coil 12, can provides roll 3 necessary strength auxiliary, make the tube wall of roll 3 be able to attenuation, and so can obtain good magnetic flux efficient.

Two, this activity stamen heart 6 relatively makes its volume shorten because of the fixing stamen heart 5 length increase, and then (about 7 g of weight have been alleviated, only for half weight of the person of commonly using), make the activity stamen heart 6 be lowered at the electric current of action time institute's conducting, increased the access times of solenoid valve under stationary electric stores virtually, and can activate solenoid valve with lower-wattage.

Three, since shorten behind the volume the movable stamen heart 6 its position be set only account for the sub-fraction that roll 3 twines inductor coils 12, even because of the gap skiving of having reserved movable usefulness the wall thickness of roll 3, the effect that also can under the support of the fixing stamen heart 5, be avoided roll 3 to contract in producing.

Four, the movable stamen heart 6 behind this shortening volume also can lower relatively keeping the required magnetic force of its fixed-site after outage after the weight saving, dwindles so the volume of permanent magnet 4 also can be relative.

Five, this concentrating flux sleeve 9 envelopes the movable stamen heart 6 in large area, therefore good magnetic flux efficient is provided and has lowered the magnetic resistance that causes because of roll 3 thicknesss of pipe wall and the movable stamen heart 6 free gaps, made permanent magnet 4 after reduced volume, still can the magnetic line of force be transferred to the movable stamen heart 6 effectively via concentrating flux sleeve 9.

The above is the utility model preferred embodiment only, is not so inflexible limit the application claim, and all the utility model equivalences change structure, all belong within the utility model protection domain.

Claims

1. solenoid valve, constitute by electromagnetism portion and valve seat, it is characterized in that: described electromagnetism portion includes the magnetic conduction frame and the inner roll that is wound with inductor coil of an outside, in the center tube of roll, from top to bottom be equiped with permanent magnet, fixedly the stamen heart and the movable stamen heart in regular turn, fixedly the stamen heart is positioned at the overwhelming majority zone that roll twines inductor coil, and the more movable stamen heart of its length is for long, and the top of permanent magnet is adsorbed on the top board base of magnetic conduction frame;

Be separately installed with a return spring and valve disc at the intracardiac center position of movable stamen; The top of return spring is supported and is located at the fixedly bottom of the stamen heart, and its bottom then is resisted against on the valve disc; Valve disc shelters from the pipe head piece of valve seat;

Do not twine inductor coil and be arranged with a concentrating flux sleeve at roll corresponding to the position of the movable stamen heart.

2. solenoid valve as claimed in claim 1 is characterized in that: the described fixedly stamen heart is about 3: 2 with the length ratio of the movable stamen heart.