Electromagnetic relay for interference arc

Abstract

The utility model relates to the technical field of electromagnetic relays, in particular to an electric arc interference electromagnetic relay, which comprises a base, a movable contact, a static contact and magnetic steel, a pair of coil leading-out pins are transversely inserted into one side of the outer part of the base, a movable spring leading-out pin and a static spring leading-out pin are longitudinally inserted into the other side of the outer part of the base, and the movable spring leading-out pin is inwards connected with a yoke. A framework is arranged on the inner side of the yoke, an iron core is arranged in the framework, a coil is arranged outside the framework, the other end of the yoke is connected with the armature through a movable contact spring, a movable contact is arranged at one end of the movable contact spring, a static spring leading-out pin is inwards connected with the static contact, and magnetic steel is clamped in the base. By arranging the magnetic steel, electric repulsive force generated by a magnetic field lengthens an electric arc, an electric arc path is prolonged, electric arc strength is reduced, contact abrasion and heat emitted from the contact are reduced, and the service life of the contact is prolonged; the electromagnetic relay can be conveniently integrated into an existing structure, the size of the whole electromagnetic relay cannot be obviously increased, the long-term stability is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic relays, and more specifically, the utility model relates to an electromagnetic relay for interfering with arc.

Background Art

[0002] An electromagnetic relay is a relay that uses electromagnetic force to drive mechanical components to move relatively to produce a predetermined response. It generally consists of a magnetic circuit part, a moving spring part, a static spring part, a base and a housing. The magnetic circuit part includes an iron core, a coil bobbin wound with enameled wire, an armature, a yoke iron, etc. When an electric current passes through the coil (i.e., the enameled wire), an electromagnetic force is generated, and the armature is attracted and contacts the pole face at one end of the iron core, thereby driving the moving contact of the moving spring part to contact or separate from the static contact of the static spring part; when the current in the coil disappears, the electromagnetic force disappears accordingly, and the armature resets and separates from the pole face at one end of the iron core, so that the moving contact of the moving spring part separates from or contacts the static contact of the static spring part. By the contact or separation of the moving contact and the static contact, the purpose of conducting or cutting off the circuit is achieved.

[0003] An existing electromagnetic relay for preventing arc short circuit, with the publication number of CN 216719778 U, includes a base, a magnetic circuit part and a contact part. The base is provided with a first accommodating cavity, and a plurality of partition plates are arranged in the first accommodating cavity to divide the first accommodating cavity into a plurality of partition cavities. A first opening leading to each partition cavity is arranged on the side of the first accommodating cavity; the contact part includes a plurality of contact units, and each contact unit respectively includes a moving spring component and a static spring component installed in the corresponding partition cavity. The armature of the magnetic circuit part is matched with each moving spring component through a pushing card; it also includes a first arc separating plate, the first arc separating plate seals all or part of the first opening, and a plurality of first baffles are arranged on the inner side surface of the first arc separating plate. At least one first baffle is laterally inserted into each partition cavity, and the first baffle is adjacent to or in contact with the partition plate of the partition cavity, forming at least two arc separating walls located between adjacent partition cavities. This kind of electromagnetic relay isolates the arc generated by the moving spring and the static spring parts through the baffle. Using this kind of physical isolation method increases the cost and causes heat concentration, which will cause damage to the partition plate after long-term use.

Content of the Utility Model

[0004] In order to overcome the above defects of the prior art, the purpose of the utility model is to provide an electromagnetic relay for interfering with arc, which can stretch the arc by a magnetic steel to accelerate the arc extinguishing effect and achieve the purpose of protecting the contacts.

[0005] To achieve the above object, the present utility model provides the following technical solution: An electromagnetic relay for interfering with arcs, comprising a base, an iron core, a bobbin, a coil, a yoke, an armature, a moving contact, a static contact, a permanent magnet, coil lead-out pins, a moving reed, a moving reed lead-out pin, and a static reed lead-out pin. A pair of coil lead-out pins are horizontally inserted on one side of the outside of the base, and the moving reed lead-out pin and the static reed lead-out pin are vertically inserted on the other side of the outside of the base. The moving reed lead-out pin is connected to the yoke inwardly. A bobbin is provided inside the yoke. An iron core is provided inside the bobbin, and a coil is provided outside the bobbin. The other end of the yoke is connected to the armature through a moving reed. A moving contact is provided at one end of the moving reed. The static reed lead-out pin is connected to the static contact inwardly. A permanent magnet is snap-fitted inside the base.

[0006] Preferably, the bobbin is in an I shape, the bobbin is arranged inside the yoke, the iron core is inserted inside the bobbin, and the coil is sleeved outside the bobbin.

[0007] Preferably, the coil is connected to the coil lead-out pins outwardly.

[0008] Preferably, the yoke is in an L shape, and the yoke and the moving reed lead-out pin are inserted on one side of the base.

[0009] Preferably, the moving reed is bent into an L shape, and both ends are respectively fixed on the yoke and the armature.

[0010] Preferably, the moving contact and the static contact are arranged corresponding to each other vertically.

[0011] Preferably, the permanent magnet is arranged on one side of the contact, and the permanent magnet is perpendicular to the axial direction of the moving contact and the static contact.

[0012] Preferably, a sealing block is provided outside the permanent magnet, and the sealing block is epoxy resin.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By arranging a permanent magnet in the electromagnetic relay for interfering with arcs of the present utility model, the electric repulsive force of the magnetic field stretches the arc, extends the arc path, reduces the arc intensity, reduces the wear of the contacts, and reduces the heat dissipated from the contacts, reduces the heat dissipated from the surface of the contacts, and extends the service life of the contacts;

[0015] 2. The electromagnetic relay for interfering with arcs of the present utility model is convenient to be integrated into the existing structure, does not significantly increase the volume of the whole electromagnetic relay, improves the long-term stability, and reduces the maintenance cost.

Description of the Drawings

[0016] Figure 1 is the structural diagram of the electromagnetic relay for interfering with arcs of the present utility model;

[0017] Figure 2It is a schematic structural diagram of an electromagnetic relay for interfering with electric arcs according to the present utility model;

[0018] Figure 3 It is a working diagram of the first embodiment of an electromagnetic relay for interfering with electric arcs according to the present utility model;

[0019] Figure 4 It is a working diagram of the second embodiment of an electromagnetic relay for interfering with electric arcs according to the present utility model;

[0020] Figure 5 It is a working diagram of the third embodiment of an electromagnetic relay for interfering with electric arcs according to the present utility model;

[0021] Figure 6 It is a working diagram of the fourth embodiment of an electromagnetic relay for interfering with electric arcs according to the present utility model;

[0022] In the figure: 1 - base, 2 - iron core, 3 - skeleton, 4 - coil, 5 - yoke iron, 6 - armature, 7 - moving contact, 8 - static contact, 9 - permanent magnet, 10 - coil lead foot, 11 - sealing block, 12 - moving reed, 13 - moving reed lead foot, 14 - static reed lead foot.

Specific implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Refer to Figure 1 、 Figure 2, in the embodiment of the present utility model, an electromagnetic relay for interfering with arcs includes a base 1, an iron core 2, a skeleton 3, a coil 4, a yoke 5, an armature 6, a moving contact 7, a static contact 8, a magnet 9, a coil lead-out pin 10, a moving reed 12, a moving reed lead-out pin 13, and a static reed lead-out pin 14. A pair of coil lead-out pins 10 are horizontally inserted on one side of the outside of the base 1, and the moving reed lead-out pin 13 and the static reed lead-out pin 14 are longitudinally inserted on the other side of the outside of the base 1. The moving reed lead-out pin 13 is connected to the yoke 5 inwardly. A skeleton 3 is provided inside the yoke 5. The skeleton 3 is in an I shape and is arranged inside the yoke 5. An iron core 2 is inserted into the skeleton 3, and a coil 4 is sleeved outside the skeleton 3. The coil 4 is connected to the coil lead-out pin 10 outwardly. The yoke 5 is in an L shape, and the yoke 5 and the moving reed lead-out pin 13 are inserted on one side of the base 1. The other end of the yoke 5 is connected to the armature 6 through a moving reed 12. The moving reed 12 is bent into an L shape and is fixed to the yoke 5 and the armature 6 at both ends respectively. A moving contact 7 is provided at one end of the moving reed 12. The static reed lead-out pin 14 is connected to the static contact 8 inwardly. The moving contact 7 and the static contact 8 are arranged corresponding to each other up and down. A magnet 9 is clamped inside the base 1. The magnet 9 is provided on one side of the contact. The magnet 9 is perpendicular to the axial direction of the moving contact 7 and the static contact 8. A sealing block 11 is provided outside the magnet 9, and the sealing block 11 is epoxy resin.

[0025] Embodiment 1:

[0026] Refer to Figure 3 , in the embodiment of the present utility model, for an electromagnetic relay for interfering with arcs, when the current direction between the contacts is from the moving contact 7 to the static contact 8, the magnetic field direction generated by the magnet 9 is outward from the contacts, the arc receives a force to the right, and under the action of the magnetic field force, the arc is stretched, and the arc voltage rapidly increases, achieving the purpose of accelerating arc extinction.

[0027] Embodiment 2:

[0028] Refer to Figure 4 , in the embodiment of the present utility model, for an electromagnetic relay for interfering with arcs, when the current direction between the contacts is from the static contact 8 to the moving contact 7, the magnetic field direction generated by the magnet 9 is outward from the contacts, the arc receives a force to the left, and under the action of the magnetic field force, the arc is stretched, and the arc voltage rapidly increases, achieving the purpose of accelerating arc extinction.

[0029] Embodiment 3:

[0030] Refer to Figure 5 , in the embodiment of the present utility model, for an electromagnetic relay for interfering with arcs, when the current direction between the contacts is from the moving contact 7 to the static contact 8, the magnetic field direction generated by the magnet 9 is inward from the contacts, the arc receives a force to the left, and under the action of the magnetic field force, the arc is stretched, and the arc voltage rapidly increases, achieving the purpose of accelerating arc extinction.

[0031] Embodiment 4:

[0032] Refer to Figure 6 , in the embodiment of the present utility model, for an electromagnetic relay that interferes with the arc, when the current direction between the contacts is from the static contact 8 to the moving contact 7, the magnetic field direction generated by the magnet 9 is towards the inside of the contacts, the arc is subjected to a force to the right, and under the action of the magnetic field force, the arc is elongated, and the arc voltage rapidly increases, achieving the purpose of accelerating arc extinction.

[0033] For the electromagnetic relay that interferes with the arc of the present utility model, by arranging the magnet 9 outside the moving contact 7 and the static contact 8 and making the magnetic field direction perpendicular to the axial direction of the contacts, when the relay is disconnected, the current direction of the arc forms an angle with the magnetic field, resulting in the arc being subjected to an electric repulsive force. Regardless of the current direction, the force received by the arc is in the left and right directions. Under the action of the electromagnetic force, the arc is elongated and the arc voltage increases, achieving the purpose of rapid arc extinction and effectively protecting the safe use of the contacts.

[0034] The above embodiments are illustrative of the present utility model and not restrictive thereof. Any solution obtained by simply transforming the present utility model falls within the protection scope of the present utility model.

Claims

1. An electromagnetic relay for interfering with an arc, characterized in that: The invention comprises a base (1), an iron core (2), a frame (3), a coil (4), a yoke (5), an armature (6), a moving contact (7), a stationary contact (8), a magnetic steel (9), a coil lead pin (10), a moving spring sheet (12), a moving spring lead pin (13), and a stationary spring lead pin (14). A pair of coil lead pins (10) are inserted transversely on one side of the outside of the base (1), and a moving spring lead pin (13) and a stationary spring lead pin (14) are inserted longitudinally on the other side of the outside of the base (1). The movable spring lead-out pin (13) is connected inwardly to the yoke (5), a frame (3) is provided inside the yoke (5), an iron core (2) is provided inside the frame (3), a coil (4) is provided outside the frame (3), the other end of the yoke (5) is connected to the armature (6) through a movable spring sheet (12), a movable contact (7) is provided at one end of the movable spring sheet (12), the static spring lead-out pin (14) is connected inwardly to the static contact (8), and a magnetic steel (9) is clamped inside the base (1).

2. An arc interference electromagnetic relay as claimed in claim 1, characterized in that: The frame (3) is in an I-shape, the frame (3) is arranged in a yoke (5), the iron core (2) is inserted in the frame (3), and the coil (4) is arranged outside the frame (3).

3. An arc interference electromagnetic relay as claimed in claim 2, characterized in that: The coil (4) is externally connected to a coil lead-out pin (10).

4. The electromagnetic relay for interfering arc according to claim 1, characterized in that: The yoke (5) is L-shaped, and the yoke (5) and the movable spring lead-out pin (13) are plugged into one side of the base (1).

5. The arc interference electromagnetic relay according to claim 1, characterized in that: The movable spring piece (12) is bent into an L shape, and its two ends are respectively fixed on the yoke (5) and the armature (6).

6. An arc interference electromagnetic relay as claimed in claim 1, characterized in that: The moving contact (7) and the static contact (8) are arranged correspondingly up and down.

7. An arc interference electromagnetic relay as claimed in claim 1, characterized in that: The magnetic steel (9) is arranged on one side of the contact, and the magnetic steel (9) is perpendicular to the axial direction of the moving contact (7) and the static contact (8).

8. An arc interference electromagnetic relay as claimed in claim 7, characterized in that: The magnetic steel (9) is provided with a sealing block (11) outside, and the sealing block (11) is epoxy resin.

Images