CN115701645A - a relay device - Google Patents

Abstract

The invention is suitable for the technical field of relays and provides a relay device which comprises a relay body, wherein the relay body comprises a static contact plate assembly and a movable contact plate assembly which can move to be in contact with the static contact plate assembly, the static contact plate assembly is provided with static contacts arranged at intervals along a first direction, the movable contact plate assembly is provided with movable contacts used for being in contact with the static contacts, the relay body is provided with two magnetic components which are oppositely arranged along the first direction, and the static contacts and the movable contacts are positioned between the two magnetic components. According to the relay device provided by the invention, when the load end is conducted, magnetic blow-out arc extinguishing is realized under the action of Lorentz force due to the fact that the magnetic members are arranged at the upper end and the lower end (in the first direction) of the movable contact and the fixed contact, nonpolarity arc extinguishing can be realized by forward and reverse directional currents, the electrical service life of a product is greatly prolonged, the insulating property of the product is improved, and the safety and reliability are good.

Description

a relay device

technical field

The invention belongs to the technical field of relays, in particular to a relay device.

Background technique

In the arc extinguishing structure set in the current relay, the magnets are respectively located on both sides of the same plane where the central axes of the two load terminals of the relay are located. Although the load terminals each generate an arc extinguishing force away from each other, the load terminals are in The arc generated when the load terminal cuts off the large current in the forward direction is drawn on the ceramic side wall at a close distance, and continuous arcs are likely to occur when the current is reversed. The two states are likely to cause contact adhesion or cavity bursting. It can be seen that the existing technology In the relay, the magnets of the arc extinguishing structure are respectively located on both sides of the central axis of the two load terminals of the relay. It is a polarized magnetic arc blowing. The arc generated in the forward direction will splash on the ceramic side wall, and the reverse direction will be caused by two contacts The point distance is relatively close and the arc is continuous. When a short-circuit current is encountered, the two states are easy to explode, and the safety and reliability are not good.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a relay device with good safety and reliability.

The technical solution of the present invention is: a relay device, including a relay body, the relay body includes a static touch panel assembly and a moving touch panel assembly that can move to contact with the static touch panel assembly, and the static touch panel assembly There are static contacts arranged at intervals along the first direction, the movable contact plate assembly has a movable contact for contacting the static contacts, and the relay body is provided with two magnetic contacts arranged opposite to each other along the first direction. member, the static contact and the movable contact are located between the two magnetic members.

Optionally, the inner side of the magnetic member faces the static contact and the movable contact, and an arc extinguishing cover is connected to the outer side of the magnetic member, and the arc extinguishing cover forms a The enclosing structure of the periphery of the moving touch panel assembly and the static touch panel assembly.

Optionally, the arc extinguishing cover is magnetically adsorbed to the magnetic member; the arc extinguishing cover includes a back plate and side plates integrally formed on both sides of the back plate and arranged parallel to each other, and the arc extinguishing cover has two Two arc extinguishing covers are arranged facing each other.

Optionally, an arc extinguishing grid is arranged in the relay body, and the arc extinguishing grid is arranged on both sides of the stationary contact and the moving contact along the second direction, and the second direction is different from the first direction. Vertically, the arc chute is located within the enclosure.

Optionally, the moving touch panel assembly includes a moving touch panel, one side of the moving touch panel is provided with two moving contacts, and two sides of the moving contact panel are provided with an arc striking angle, and the arc striking angle is located at the The movable contact is on both sides of the second direction, and the arc striking angle is located between two arc extinguishing grids.

Optionally, the moving touch panel assembly further includes a moving touch panel bracket and a moving yoke, the moving touch panel bracket is fixedly connected to the moving yoke, and the moving touch panel is connected to the moving touch panel bracket;

The moving touch panel bracket has a mounting column, and the installing column has a installing groove, the moving touching panel passes through the installing groove and can slide along the installing groove, and the moving touching panel assembly also includes a The elastic assembly of the moving touch panel, the elastic assembly includes a positioning clamp and an elastic member, the positioning clamp is connected to the installation groove, one end of the elastic member is in contact with one side of the positioning clamp, the The other end of the elastic member is connected to the other surface of the moving touch panel.

Optionally, the elastic component further includes a buffer pad, and the buffer pad is bonded to the other side of the positioning clamp plate through an adhesive.

Optionally, the arc extinguishing grid includes two mounting plates facing each other along the first direction and a plurality of parallel and spaced grid pieces, the grid pieces are connected between the two mounting plates, and the grid pieces It is a metal grid or a ceramic grid.

Optionally, the grid is a brass grid whose surface is plated with nickel.

Optionally, an arc chute insulating bracket is provided inside the relay body, and the arc chute insulating bracket is provided with positioning grooves for installing the magnetic member on opposite sides in the first direction, and the arc chute is insulated The bracket is provided with two sets of arc extinguishing chambers, the arc extinguishing grid is arranged in the arc extinguishing chamber, and each set of arc extinguishing chambers includes two sets of arc extinguishing chambers arranged opposite to the static contact and the moving contact along the second direction. The two arc extinguishing chambers on both sides.

Optionally, the relay body includes an upper case, and the upper case cover is disposed outside the arc extinguishing cover and connected to the arc extinguishing grid insulating support through a locking piece;

The side wall of the arc extinguishing chamber is provided with a positioning slot, and the outer surface of the mounting plate is provided with a positioning protrusion that can extend into the positioning slot.

Optionally, the opposite ends of the two magnetic members have opposite polarities.

Optionally, the static contact plate assembly includes two static contact plates arranged at intervals, each of which is provided with a static contact; one of the static contact plates extends from one side of the relay body The other static contact plate protrudes from the other side of the relay body.

In the relay device provided by the present invention, when the load terminal is turned on, since the upper and lower ends (first direction) of the movable contact and the static contact are arranged with magnetic members (strong magnets), under the action of the Lorentz force Realize magnetic blowing arc extinguishing, both positive and negative direction current can realize non-polar arc extinguishing, arc extinguishing cover is adsorbed on the magnetic member to increase the magnetic field strength within the contact range, and the arc generated by large current short circuit can be extinguished more quickly, and at the same time Brass metal grids are used to divide the arc into many short arcs in series, and the voltage of each short arc is increased to extinguish the arc. After the arc enters the arc extinguishing chamber, the arc extinguishing grid is used to cool it to increase the arc resistance and at the same time close the arc. The metal particles produced by the on-load on-off improve the insulation performance between the contacts. The combination of non-polar current magnetic blowing and open arc extinguishing grid chamber can extinguish the arc faster and greatly improve the electrical life of the product. , and improve the insulation performance of the product, with good safety and reliability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a three-dimensional assembly diagram of a relay device provided by an embodiment of the present invention;

Fig. 2 is a three-dimensional exploded schematic diagram of a relay device provided by an embodiment of the present invention;

Fig. 3 is a top view of a relay device provided by an embodiment of the present invention;

Fig. 4 is the sectional schematic diagram of the G-G section of a kind of relay device in Fig. 3;

Fig. 5 is the sectional schematic diagram of the F-F section of a kind of relay device in Fig. 3;

Fig. 6 is the sectional schematic diagram of the H-H section of a kind of relay device in Fig. 3;

Fig. 7 is a schematic perspective view of an elastic component in a relay device according to an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should also be noted that the orientation terms such as left, right, up, and down in the embodiments of the present invention are only relative concepts or refer to the normal use state of the product, and should not be regarded as restrictive .

As shown in FIGS. 1 to 3 , a relay device provided by an embodiment of the present invention includes a relay body 100 , the relay body 100 includes a static contact plate assembly 20 and is movable to contact with the static contact plate assembly 20 The moving touch panel assembly 10, the static touch panel assembly 20 has static contacts 201 (static composite contacts) arranged at intervals along the first direction, the moving touch panel assembly 10 has a The moving contact 101 (moving composite contact) in contact with each other, the relay body 100 is provided with two magnetic members (which can be strong magnets or magnetic steel, etc.) And the movable contact 101 is located between the two magnetic members 30, so that the magnetic member 30 is located at the opposite ends of the static contact 201 and the movable contact 101. Magnetic components 30 are arranged at both ends of the point 201 to achieve magnetic blowout arc extinguishing under the action of Lorentz force, and both forward and reverse direction currents can realize non-polar arc extinguishing, which has good safety and reliability.

Specifically, as shown in FIGS. 1 to 3 , the relay body 100 includes an upper case 140 , the inner side of the magnetic member 30 faces the static contact 201 and the movable contact 101 , and the outer side of the magnetic member 30 The arc extinguishing cover 40 is connected, and the arc extinguishing cover 40 can be attached to or close to the inner wall of the upper shell 140 . The arc extinguishing cover 40 forms an enclosing structure surrounding the periphery of the magnetic member 30 , the moving touch panel assembly 10 and the static touch panel assembly 20 , which is beneficial to further ensure reliability. The arc extinguishing cover 40 can be made of iron or ferromagnetic material, and the arc extinguishing cover 40 is adsorbed on the magnetic member 30, which is beneficial to increase the magnetic field of the magnetic member 30 within the range of the contacts (stationary contact 201, moving contact 101) Intensity, the arc generated by the large current short circuit can be extinguished more quickly,

Specifically, as shown in FIGS. 1 to 3 , the arc extinguishing cover 40 includes a back plate 41 and side plates 42 integrally formed on both sides of the back plate 41 and arranged parallel to each other. The arc extinguishing cover 40 has two One, two arc extinguishing covers 40 are arranged facing each other to form a rectangular enclosure, the two arc extinguishing covers 40 can be connected or have a certain gap, the inner side of the back plate 41 can be adsorbed on the magnetic member 30, the back plate The outer side of 41 and the outer side of the side plate 42 can be attached to or close to the inner wall of the upper shell 140 .

Specifically, as shown in FIG. 1 to FIG. 4 , an arc extinguishing grid 50 is disposed inside the relay body 100, and the arc extinguishing grid 50 is disposed on both sides of the static contact 201 and the movable contact 101 along the second direction. side, the second direction is perpendicular to the first direction, and the arc chute 50 is located in the enclosed structure formed by the arc extinguishing cover 40 , that is, the arc chute 50 is located between the two side plates 42 of the arc extinguishing cover 40 During this period, the arc chute 50 can divide the generated arc into many short arcs in series, and the voltage of each short arc is increased to extinguish the arc. After the arc enters the arc chute 50, it is cooled by the grid of the arc chute In order to increase the arc resistance, at the same time store and store the metal particles produced by the on-load on-off to improve the insulation performance between the contacts.

Specifically, as shown in FIG. 1 to FIG. 5 , the moving touch panel assembly 10 includes a moving touch panel 11, and two moving contacts 101 are arranged on one side of the moving touch panel 11. The arc starting angle 12 is set on the side, the arc starting angle 12 is located on both sides of the movable contact 101 in the second direction, and the arc starting angle 12 is located between the two arc extinguishing grids 50, the arc starting angle The root of 12 is integrally connected to the moving contact plate 11, and the end of the arc striking angle 12 is close to the arc extinguishing grid 50. By designing the arc striking angle 12 on the left and right sides of the moving contact 101 at both ends of the moving contact plate 11, the arc striking angle 12 faces outward relative to the movable contact plate 11 and extends obliquely upward, which can help to introduce the arc into the arc chute 50 smoothly.

Specifically, as shown in FIGS. 1 to 6 , the moving touch panel assembly 10 further includes a moving touch panel bracket 13 and a moving yoke iron 14 , and the moving touch panel bracket 13 is fixedly connected to the moving yoke through a fixing piece 15 The iron 14 and the fixing member 15 can be bolts, and the moving contact plate 11 is connected to the moving contact plate support 13 .

Specifically, the moving contact board support 13 has a mounting column 131, and the mounting column 131 has a mounting groove 132, and the mounting groove 132 is arranged along the longitudinal direction (a direction perpendicular to the first direction and the second direction). The plate 11 passes through the installation groove 132 and can slide longitudinally along the installation groove 132, so that the two movable contacts 101 can contact the two stationary contacts 201 to connect the load. In a specific application, the moving touch panel assembly 10 may be connected with a reset component, and the reset component may be a spring or the like.

Specifically, the moving touch panel assembly 10 also includes an elastic assembly for the moving touch panel 11, the elastic assembly includes a positioning clamp 141 and an elastic member 142, and the positioning clamp 141 is connected to the installation groove 132, the elastic piece 142 is located in the installation groove 132, one end of the elastic piece 142 is connected to one side of the positioning clamp 141, and the other end of the elastic piece 142 is connected to the other side of the moving contact plate 11, The elastic member 142 can be a buffer spring, which can be pre-pressed on the movable contact plate 11, and the sliding stroke of the movable contact plate assembly 10 to the direction of the static contact 201 can be slightly larger. The movable contact 101 collides rigidly with the stationary contact 201 to cause additional wear.

Specifically, as shown in FIG. 2, FIG. 5 and FIG. 7, the elastic assembly further includes a buffer pad 143, and the buffer pad 143 is bonded to the other side of the positioning clip 141 through an adhesive member 144, and the bonding The piece 144 can be double-sided tape, and the buffer pad 143 is close to the upper end of the mounting column 131 , which is beneficial to reduce the noise when the moving touch panel assembly 10 is in motion.

Specifically, the arc extinguishing grid 50 includes two mounting plates 51 arranged at intervals along the first direction and a plurality of grid sheets 52 arranged at intervals in parallel. Between the plates 51, the grids 52 are metal grids (such as ferromagnetic grids or copper grids, etc.) or ceramic grids, which have a good arc extinguishing effect.

Specifically, the mounting board 51 may be a melamine glass cloth board, which has good insulation and relatively high structural strength.

In this embodiment, the grid piece 52 is a brass grid piece with a nickel-plated surface, which has a good arc extinguishing effect and a long service life.

Specifically, the relay body 100 is provided with an arc chute insulating bracket 60 , which can be a plastic bracket with low manufacturing cost and good insulation effect. The arc extinguishing grid insulating support 60 is provided with positioning grooves 61 for installing the magnetic member 30 on opposite sides in the first direction, and the arc extinguishing grid insulating support 60 is provided with two sets of arc extinguishing chambers, which can be located in the positioning slots 61 side walls. Each group of arc extinguishing chambers includes two arc extinguishing chambers arranged opposite to each other on both sides of the static contact 201 and the movable contact 101 along the second direction. The arc extinguishing grid 50 is arranged in the arc extinguishing chamber for arc extinguishing The grid 50 can be located on both sides of the two arc starting corners 12 .

Specifically, the side wall of the arc extinguishing chamber is provided with a positioning slot, and the outer surface of the mounting plate 51 is provided with a positioning protrusion 511 that can extend into the positioning slot, so as to facilitate the assembly and installation of the arc extinguishing grid 50. position.

In this embodiment, the movable contact plate 11 is provided with two movable contacts 101, and each movable contact 101 has two arc striking angles 12 on both sides, that is, the two sides of the movable contact plate 11 are provided with a total of four leading arc angles. The arc angle is 12, and the arc extinguishing grid insulating support 60 is provided with 4 arc extinguishing chambers, and each arc extinguishing chamber is provided with an arc extinguishing grid 50, and each movable contact 101 corresponds to both sides of the movable contact plate 11 (along the second direction ) all have the arc striking angle 12, that is, each movable contact 101 is located between two arc striking angles 12, and the two arc striking angles 12 are located between two arc extinguishing grids 50.

Specifically, the two magnetic members 30 are strong magnets and are arranged facing each other along the first direction, and the opposite ends of the two magnetic members 30 have opposite polarities. In this embodiment, the side of one magnetic member 30 facing the movable contact 101 and the stationary contact 201 is an N pole, and the side of the other magnetic member 30 facing the movable contact 101 and the stationary contact 201 is an S pole.

Specifically, the upper shell 140 is disposed on the outside of the arc extinguishing cover 40 and connected to the arc chute insulating support 60 through a locking member 141 , and the locking member 141 may be a screw.

Specifically, the static contact plate assembly 20 includes two static contact plates 21 arranged at intervals. The two static contact plates 21 can be arranged on both sides of the mounting column 131 (along the first direction), and each of the static contact plates 21 are all provided with a static contact 201; one of the static contact plates 21 protrudes from one side of the relay body 100, and the other static contact plate 21 protrudes from the other side of the relay body 100, The two terminals are far apart, which is conducive to further improving safety and reliability. The end of the static contact plate 21 protruding from the relay body 100 may be a load terminal.

In a specific application, an improved strong magnet can be arranged on both sides of the movable contact 101 and the static contact 201 to realize non-polarity magnetic blowout. The two sides of the moving touch panel 11 are designed with arc striking angles 12 on the left and right sides of the contacts, and the adjustment of the angles can be adjusted according to the actual situation. In this embodiment, the grid piece 52 used is a brass nickel-plated metal grid piece 52. Of course, the composition of the grid piece 52 material can also be adjusted according to the actual situation. An open arc extinguishing chamber and a non-polar magnetic blower can be used. The combined method of arc extinguishing synchronous use achieves the purpose of rapid arc extinguishing.

In a specific application, the movable contact plate support 13 is fixed on the movable yoke 14 through the combination bolt 135, and the movable contact plate 11 is placed on the movable contact plate support 13, wherein the movable contact 101 is welded to the movable contact plate 11, and the elastic member 142 ( Buffer spring) pre-presses the moving contact plate 11, the magnetic member 30 is installed in the positioning groove 61 of the arc chute insulation bracket 60, the arc extinguishing cover 40 is adsorbed on the magnetic member 30 and installed in the upper shell 140, the two magnetic The facing polarities of the members 30 are opposite. When the outside of the movable yoke 14 is driven by the electromagnetic force of the coil, it moves downward in the longitudinal direction, and the parallel movable contact plate 11 and the movable contact 101 conduct electricity with the static contact 201 on the static contact plate assembly 20 . The arc chute insulation bracket 60 is installed in the upper shell 140 through fixing screws.

In the relay device provided by the embodiment of the present invention, when the load terminal is turned on, since the upper and lower ends (first direction) of the movable contact 101 and the static contact 201 are arranged with magnetic members 30 (strong magnets), in Loren Under the action of magnetic force, the magnetic arc extinguishing is realized, and the current in the positive and negative directions can realize non-polar arc extinguishing. The arc extinguishing cover 40 is adsorbed on the magnetic member 30 to increase the magnetic field strength within the contact range, and the arcing caused by the large current short circuit It can extinguish the arc more quickly. At the same time, the brass metal grid 52 is used to divide the arc into many short arcs in series, and the voltage of each short arc is increased to extinguish the arc. It is cooled to increase the arc resistance, and at the same time, it collects and stores the metal particles produced by the on-load on-off to improve the insulation performance between the contacts. It integrates the non-polar current magnetic blower and the open arc extinguishing grid 50 chambers to achieve faster speed. Arc extinguishing greatly improves the electrical life of the product, and improves the insulation performance of the product. It has the ability to break the short-circuit current of more than 20KA (5ms) multiple times, and has good safety and reliability.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (13)

1. A relay device is characterized by comprising a relay body, wherein the relay body comprises a fixed contact plate assembly and a movable contact plate assembly which can move to be in contact with the fixed contact plate assembly, the fixed contact plate assembly is provided with fixed contacts which are arranged at intervals along a first direction, the movable contact plate assembly is provided with a movable contact which is used for being in contact with the fixed contacts, the relay body is provided with two magnetic members which are arranged oppositely along the first direction, and the fixed contacts and the movable contact are positioned between the two magnetic members.

2. A relay assembly according to claim 1, wherein said magnetic member has an inner side facing said fixed contact and said movable contact, and an arc-extinguishing chamber is connected to an outer side of said magnetic member, said arc-extinguishing chamber forming an enclosure around said magnetic member, said movable contact plate assembly and said fixed contact plate assembly.

3. The relay device according to claim 2, wherein said arc-extinguishing cover is magnetically attracted to said magnetic member; the arc extinguishing cover comprises a back plate and side plates which are integrally formed on two sides of the back plate and are arranged in parallel in opposite directions, and the two arc extinguishing covers are arranged in opposite directions.

4. The relay device according to claim 2, wherein an arc chute is provided in said relay body, said arc chute being disposed on both sides of said stationary contact and said movable contact along a second direction, said second direction being perpendicular to said first direction, said arc chute being disposed in said enclosure.

5. The relay device according to claim 4, wherein said movable contact assembly includes a movable contact plate, one surface of said movable contact plate is provided with two movable contacts, both sides of said movable contact plate are provided with arc striking corners, said arc striking corners are located on both sides of said movable contact in the second direction, and said arc striking corners are located between two said arc chutes.

6. The relay device according to claim 5, wherein said movable contact plate assembly further comprises a movable contact plate holder and a movable yoke, said movable contact plate holder being fixedly connected to said movable yoke, said movable contact plate being connected to said movable contact plate holder;

the movable contact plate support is provided with an installation column, the installation column is provided with an installation groove, the movable contact plate penetrates through the installation groove and can slide along the installation groove, the movable contact plate assembly further comprises an elastic assembly acting on the movable contact plate, the elastic assembly comprises a positioning clamping plate and an elastic piece, the positioning clamping plate is connected to the installation groove, one end of the elastic piece is connected with one surface of the positioning clamping plate, and the other end of the elastic piece is connected to the other surface of the movable contact plate.

7. The relay assembly according to claim 6, wherein said resilient member further comprises a cushion pad, said cushion pad being adhered to the other side of said positioning tab by an adhesive member.

8. The relay device according to claim 2, wherein said arc chute comprises two mounting plates facing each other along a first direction and a plurality of parallel and spaced-apart grids connected between said two mounting plates, said grids being metal grids or ceramic grids.

9. The relay device according to claim 8, wherein said grid is brass and is nickel plated on the surface.

10. The relay device according to claim 8, wherein an arc chute insulating bracket is provided in the relay body, the arc chute insulating bracket is provided with positioning grooves for mounting the magnetic member on opposite sides in the first direction, the arc chute insulating bracket is provided with two sets of arc extinguishing chambers, the arc chute is provided in the arc chute, and each set of arc extinguishing chambers includes two arc extinguishing chambers oppositely provided on opposite sides of the fixed contact and the movable contact in the second direction.

11. The relay device according to claim 10, wherein the relay body includes an upper case which is provided outside the arc extinguishing cover and is connected to the arc extinguishing grid insulating holder by a locking member;

the lateral wall in arc-extinguishing chamber is provided with positioning slot, the lateral surface of mounting panel is provided with and can stretch into positioning slot's location is protruding.

12. A relay arrangement according to any of claims 1-11, wherein the facing ends of the two magnetic members are of opposite polarity.

13. A relay arrangement according to any one of claims 1 to 11, wherein said stationary contact assembly comprises two spaced stationary contacts, each of said stationary contacts being provided with a stationary contact; one of the stationary contact plates extends from one side of the relay body, and the other stationary contact plate extends from the other side of the relay body.

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