CN2171904Y

CN2171904Y - Pulse electromagnet

Info

Publication number: CN2171904Y
Application number: CN 93239214
Authority: CN
Inventors: 彭德康
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-02
Filing date: 1993-09-02
Publication date: 1994-07-13
Anticipated expiration: 2003-09-02

Abstract

The utility model discloses a pulse electromagnet, which is used on various reversal valves. On the basis of the existing DC electromagnet, a rare earth permanent magnet is additionally fixed on the armature iron of an electromagnet or is additionally fixed on an iron core. A micro switch is additionally arranged on the side of the upper cover of the electromagnet. The utility model has the advantages of simple structure, sensitive response, quick actions, less power consumption and energy conservation. The utility model can be the replacement of old generation products of the existing electromagnet.

Description

Pulse electromagnet

The utility model relates in the automation field electromagnet used on the various valves.

Existing various valve control electromagnets all do not have locator function at present.It is to leave initial position by promoting spool for the coil electricity adhesive armature, enters the service position.When giving coil blackout, be effect by back-moving spring, make spool get back to initial position again.As keeping the service position of spool, just must continue energising to coil always.Thereby the energy consumption of existing electromagnet is higher.In addition, existing electromagnet security reliability is very poor, in case when running into sudden power or voltage and descending, magnet spool is dead electricity suddenly also, makes the connection operating state flip-flop of valve and produces misoperation, causes the accident.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and a kind of reliable operation be provided, be quick on the draw, be swift in motion, safe in utilization, energy consumption is low, cost is few, can be widely used in the impulse mgnet of all kinds of control valves.

The utility model is realized by following measure: it is that a rare-earth permanent magnet is added on the armature that is fixed in the existing DC electromagnet, or on the iron core.

The rare-earth permanent magnet that the utility model added can clamping between upper and lower armature; Also can be set on the cylindrical of armature; Can also be fixed on the end face of armature or iron core.

The lower end of the utility model armature cylindrical can be cone-shaped, and the endoporus front end of iron core is the taper hole shape, and the guiding with this during as their adhesives partly.

The utility model can also be loaded onto a sensitive switch that is fixed on the control that collision block clashes into of spool upper end in the side of loam cake.

The drawing of accompanying drawing is described as follows:

Fig. 1 is first kind of in running order structure chart of embodiment of the utility model.

Fig. 2 is the structure chart that first kind of embodiment of the utility model is in initial condition.

Fig. 3 is the structure chart of second kind of embodiment of the utility model.

Fig. 4 is the structure chart of the third embodiment of the utility model.

Fig. 5 is the structure outside drawing that the third embodiment of the utility model and alternating electromagnet and reversal valve are formed pulse valve.

The utility model is described in further detail below in conjunction with embodiment:

The basic structure of this impulse mgnet is the same with the conventional DC electromagnet, is made up of housing (6), magnetizing coil (5), iron core (7), armature (2), spool (8), loam cake (1) and lower cover (3) etc.Armature (7) can be divided into upper armature (2-2) and lower armature (2-1) two parts, and the cylindrical lower end of lower armature (2-1) is cone-shaped, simultaneously a rare-earth permanent magnet (4) is bonded between upper armature (2-2) and the lower armature (2-1).Again they one are reinstated the upper end that screw thread is fixed in spool (8) cylindrical afterwards.The front end of iron core (7) endoporus is the taper hole shape.On its cylindrical, be with magnetizing coil (5), and then the endoporus of iron core (7) be set on the lower end of spool (8) cylindrical.At last upper and lower armature (2-2), (2-1), rare-earth permanent magnet (4), iron core (7), excitation coil (5) and spool (8) are packed into together in the housing (6), and the two ends of housing (6) are sealed with loam cake (3) and lower cover (1).More than be first kind of embodiment of the present utility model.As Fig. 3 is also to be fixed with a collision block (9) with screw thread on the upper end cylindrical of spool (8), and a sensitive switch (10) that can be subjected to collision block (9) control also is housed in the side of loam cake (3) simultaneously, just constitutes second kind of embodiment of the present utility model.As Fig. 4, be that rare-earth permanent magnet (4) directly is bonded on the lower surface of iron core (7), just constitute the third embodiment of the present utility model.This embodiment can be used to be serially connected between reversal valve (1) and the alternating electromagnet (12), is assembled into pulse valve, as shown in Figure 5.

This impulse mgnet is work like this, and when initial position, rare-earth permanent magnet and the gap between the iron core on the armature are big, and magnetic resistance is big, and the suction-combining force of magnet is little.Under the effect of back-moving spring that this spool can be in reversal valve, make armature leave iron core and constrain on the initial position.Make this impulse mgnet enter operating state, only needing provides the electric pulse of a pulsewidth greater than 1/4 second or the galvanic forward exciting curent in 1/4 second to magnetizing coil, then the electromagnetic field of magnetizing coil generation can be strengthened the rare-earth permanent magnet magnetic field intensity, the suction-combining force that produces is greater than the active force of back-moving spring, so armature moves downward with regard to belt spool, contact with iron core up to armature, gap between armature and iron core is very little at this moment, magnetic resistance is also very little, rare-earth permanent magnet magnetic flux density strengthens greatly, even behind the forward exciting curent on the disconnection magnetizing coil, the suction-combining force of permanent magnet is still greater than the reset force of back-moving spring, and makes this electromagnet in running order reliably.If will make electromagnet get back to initial position, only need to add an instantaneous reverse current to magnetizing coil.Like this, can produce the magnetic field intensity that an instantaneous reverse electromagnetic field weakens rare-earth permanent magnet on the magnetizing coil, make the active force of the suction-combining force of permanent magnet less than the reversal valve upper reset spring.So, under the effect of back-moving spring power, force armature to drive spool and leave iron core, get back to initial constrained again.

The utility model has following advantage compared to existing technology: this electromagnet structure is simple, making is easy, and reliable operation, be quick on the draw, save the energy, only needing energising just can finish adhesive and the release of electromagnet 1/4 second, is the renewal product of existing electromagnet.

Claims

1, a kind of impulse mgnet of forming by housing (6), magnetizing coil (5), iron core (7), armature (2), spool (8), loam cake (3) and lower cover (1), it is characterized in that a rare-earth permanent magnet (4) interpolation is fixed on the armature (2), or on the iron core (7).

2, impulse mgnet according to claim 1, it is characterized in that the rare-earth permanent magnet (4) that added can clamping between upper and lower armature (2-2), (2-1), also can be set on the cylindrical of armature (2), can also be fixed on the end face of armature (2) or iron core (7).

3, impulse mgnet according to claim 1 and 2 it is characterized in that the lower end of armature (2) cylindrical can be cone-shaped, and the endoporus front end of iron core (7) is the taper hole shape.

4, impulse mgnet according to claim 3 is characterized in that in the side of loam cake (3), loads onto a collision block (9) that is fixed on spool (8) upper end and clashes into the sensitive switch (10) of control.