A relay device

Abstract

The present invention is applicable to the field of relay technology and provides a relay device comprising a relay body, the relay body comprising a stationary contact plate assembly and a movable contact plate assembly movable into contact with the stationary contact plate assembly, the stationary contact plate assembly having stationary contacts spaced apart along a first direction, the movable contact plate assembly having a movable contact for contacting the stationary contact, the relay body being provided with two magnetic components disposed opposite each other along the first direction, the stationary contact and the movable contact being located between the two magnetic components. The relay device provided by the present invention, when the load end is conducting, achieves magnetic arc extinguishing under the action of the Lorentz force due to the magnetic components disposed at the upper and lower ends (in the first direction) of the movable and stationary contacts. Both positive and negative currents can achieve non-polarity arc extinguishing, significantly extending the electrical life of the product, improving the insulation performance of the product, and providing excellent safety and reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of relays, and in particular relates to a relay device. Background Art

[0002] In the arc extinguishing structure currently provided in relays, magnets are located on both sides of the same plane where the central axes of the two load terminals of the relay are located. Although this provides the load terminals with an arc extinguishing force that moves away from each other, the arc generated by the load terminals when cutting off a large current in the forward direction is likely to arc on the ceramic side wall at a close distance, and a continuous arc is likely to occur when the current is passed in the reverse direction. Both conditions are likely to cause contact adhesion or cavity rupture. It can be seen that in the relays of the prior art, the magnets of the arc extinguishing structure are located on both sides of the central axis of the two load terminals of the relay, which is a polarized magnetic arc blowing. The arc generated in the forward direction will splash on the ceramic side wall, and the arc will be continuous due to the close distance between the two contacts in the reverse direction. When encountering a short-circuit current, both conditions are likely to cause fire, and the safety and reliability are poor. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a relay device with good safety and reliability.

[0004] The technical solution of the present invention is: a relay device, including a relay body, the relay body including a stationary contact plate assembly and a movable contact plate assembly that can be moved to contact the stationary contact plate assembly, the stationary contact plate assembly having stationary contacts arranged at intervals along a first direction, the movable contact plate assembly having a movable contact for contacting the stationary contacts, the relay body being provided with two magnetic components arranged facing each other along the first direction, the stationary contact and the movable contact being located between the two magnetic components.

[0005] Optionally, the inner side of the magnetic component faces the static contact and the moving contact, and the outer side of the magnetic component is connected to an arc extinguishing cover, which forms an enclosure structure surrounding the magnetic component, the moving contact plate assembly and the static contact plate assembly.

[0006] Optionally, the arc-extinguishing cover is magnetically adsorbed on the magnetic component; 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 there are two arc-extinguishing covers, which are arranged facing each other.

[0007] Optionally, an arc extinguishing grid is provided in the relay body, and the arc extinguishing grid is arranged on both sides of the static contact and the movable contact along a second direction, the second direction is perpendicular to the first direction, and the arc extinguishing grid is located in the enclosed structure.

[0008] Optionally, the moving touch plate assembly includes a moving touch plate, two moving contacts are provided on one side of the moving touch plate, arc striking angles are provided on both sides of the moving touch plate, the arc striking angles are located on both sides of the moving contact in the second direction, and the arc striking angles are located between the two arc extinguishing grids.

[0009] Optionally, the movable touch panel assembly further comprises a movable touch panel bracket and a movable yoke, wherein the movable touch panel bracket is fixedly connected to the movable yoke, and the movable touch panel is connected to the movable touch panel bracket;

[0010] The movable touch panel bracket has a mounting post, and the mounting post has a mounting slot. The movable touch panel passes through the mounting slot and can slide along the mounting slot. The movable touch panel assembly also includes an elastic component for the movable touch panel, and the elastic component includes a positioning card plate and an elastic member. The positioning card plate is connected to the mounting slot, one end of the elastic member is connected to one side of the positioning card plate, and the other end of the elastic member is connected to the other side of the movable touch panel.

[0011] Optionally, the elastic component further includes a buffer pad, and the buffer pad is bonded to the other side of the positioning clamping plate through an adhesive.

[0012] Optionally, the arc extinguishing grid includes two mounting plates arranged facing each other along a first direction and a plurality of grid plates arranged in parallel and spaced apart. The grid plates are connected between the two mounting plates and are metal grid plates or ceramic grid plates.

[0013] Optionally, the grid is a brass grid with a nickel-plated surface.

[0014] Optionally, an arc extinguishing grid insulating bracket is provided in the relay body, and the arc extinguishing grid insulating bracket is provided with positioning grooves for installing the magnetic component on opposite sides in the first direction. The arc extinguishing grid insulating bracket is provided with two groups of arc extinguishing cavities, and the arc extinguishing grid is provided in the arc extinguishing cavity. Each group of arc extinguishing cavities includes two arc extinguishing cavities arranged on both sides of the static contact and the moving contact relatively along the second direction.

[0015] Optionally, the relay body includes an upper shell, the upper shell cover is arranged outside the arc extinguishing cover and is connected to the arc extinguishing grid insulation bracket through a locking member;

[0016] The side wall of the arc extinguishing chamber is provided with a positioning slot, and the outer side surface of the mounting plate is provided with a positioning protrusion that can extend into the positioning slot.

[0017] Optionally, the polarities of the facing ends of the two magnetic components are opposite.

[0018] Optionally, the static contact plate assembly includes two static contact plates arranged at intervals, each of which is provided with a static contact point; one of the static contact plates extends from one side of the relay body, and the other static contact plate extends from the other side of the relay body.

[0019] The relay device provided by the present invention has the following advantages: when the load end is turned on, magnetic components (strong magnets) are arranged at the upper and lower ends (first direction) of the moving contact and the static contact, and arc extinguishing is achieved by magnetic blowing under the action of the Lorentz force. Both positive and negative currents can achieve non-polarity arc extinguishing. The arc extinguishing cover is adsorbed on the magnetic component to increase the magnetic field strength within the contact range, and the arc caused by large current short circuit can be extinguished more quickly. 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. At the same time, the metal particles produced by load switching are stored to improve the insulation performance between the contacts. The combination of non-polarity current magnetic blowing and open arc extinguishing grid chamber can extinguish the arc more quickly, greatly improve the electrical life of the product, and improve the insulation performance of the product, with good safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a three-dimensional assembly diagram of a relay device provided by an embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional exploded schematic diagram of a relay device provided by an embodiment of the present invention;

[0023] Figure 3 is a top view of a relay device provided by an embodiment of the present invention;

[0024] Figure 4 yes Figure 3 A schematic cross-sectional view of a GG cross-section of a relay device;

[0025] Figure 5 yes Figure 3 A schematic cross-sectional view of an FF cross-section of a relay device;

[0026] Figure 6 yes Figure 3 A schematic cross-sectional view of a HH cross-section of a relay device;

[0027] Figure 7 It is a three-dimensional schematic diagram of an elastic component in a relay device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0030] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of the present invention are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0031] like Figures 1 to 3 As shown, an embodiment of the present invention provides a relay device, including a relay body 100, the relay body 100 including a stationary contact plate assembly 20 and a movable contact plate assembly 10 movable to contact the stationary contact plate assembly 20, the stationary contact plate assembly 20 having stationary contacts 201 (stationary composite contacts) spaced apart along a first direction, the movable contact plate assembly 10 having a movable contact 101 (movable composite contact) for contacting the stationary contacts 201, the relay body 100 is provided with There are two magnetic components (which can be strong magnets or magnetic steel, etc.) 30 arranged opposite to each other along the first direction, and the static contact 201 and the moving contact 101 are located between the two magnetic components 30. In this way, the magnetic components 30 are located at the opposite ends of the static contact 201 and the moving contact 101. When the load end is turned on, magnetic components 30 are arranged at both ends of the moving contact 101 and the static contact 201. Under the action of the Lorentz force, magnetic blowout is achieved, and non-polarity arc extinguishing can be achieved for both positive and negative currents, with good safety and reliability.

[0032] Specifically, if Figures 1 to 3As shown, the relay body 100 includes an upper shell 140, the inner side of the magnetic component 30 faces the static contact 201 and the moving contact 101, and the outer side of the magnetic component 30 is connected to an arc extinguishing cover 40, which can be attached to or close to the inner wall of the upper shell 140. The arc extinguishing cover 40 forms an enclosure structure surrounding the magnetic component 30, the moving contact plate assembly 10 and the static contact plate assembly 20, which helps to further ensure reliability. The arc extinguishing cover 40 can be an iron part or a ferromagnetic material part. The arc extinguishing cover 40 is adsorbed on the magnetic component 30, which helps to increase the magnetic field strength of the magnetic component 30 within the contact range (static contact 201, moving contact 101), and can extinguish the arc caused by a large current short circuit more quickly.

[0033] Specifically, if Figures 1 to 3 As shown, 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, and the two arc-extinguishing covers 40 are arranged opposite to each other to form a rectangular frame. 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 component 30, and the outer side of the back plate 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.

[0034] Specifically, if Figures 1 to 4 As shown, an arc extinguishing grid 50 is provided in the relay body 100, and the arc extinguishing grid 50 is arranged on both sides of the static contact 201 and the moving contact 101 along the second direction, and the second direction is perpendicular to the first direction. The arc extinguishing grid 50 is located in the enclosed structure formed by the arc extinguishing cover 40, that is, the arc extinguishing grid 50 is located between the two side plates 42 of the arc extinguishing cover 40. The arc extinguishing grid 50 can divide the generated arc into many short arcs in series, increase the voltage of each short arc and thus extinguish the arc. After the arc enters the arc extinguishing grid 50, the grid of the arc extinguishing grid 50 is used to cool it to increase the arc resistance, and at the same time, the metal particles produced by the load switching are stored to improve the insulation performance between the contacts.

[0035] Specifically, if Figures 1 to 5 As shown, the movable touch plate assembly 10 includes a movable touch plate 11, and two movable contacts 101 are provided on one side of the movable touch plate 11. Arc striking angles 12 are provided on both sides of the movable touch plate 11. The arc striking angles 12 are located on both sides of the movable contact 101 in the second direction, and the arc striking angles 12 are located between the two arc extinguishing grids 50. The roots of the arc striking angles 12 are integrally connected to the movable touch plate 11, and the ends of the arc striking angles 12 are close to the arc extinguishing grids 50. By designing the arc striking angles 12 on the left and right sides of the movable contacts 101 at both ends of the movable touch plate 11, the arc striking angles 12 extend outward relative to the movable touch plate 11 and obliquely upward, which can help to smoothly introduce the arc into the arc extinguishing grid 50.

[0036] Specifically, if Figures 1 to 6As shown, the movable touch panel assembly 10 further includes a movable touch panel bracket 13 and a movable yoke 14 . The movable touch panel bracket 13 is fixedly connected to the movable yoke 14 via a fixing member 15 , which may be a bolt. The movable touch panel 11 is connected to the movable touch panel bracket 13 .

[0037] Specifically, the movable touch panel bracket 13 has a mounting post 131, which has a mounting slot 132. The mounting slot 132 is arranged longitudinally (perpendicular to both the first and second directions). The movable touch panel 11 passes through the mounting slot 132 and can slide longitudinally along the mounting slot 132, so that the two movable contacts 101 can contact the two stationary contacts 201 to connect the load. In specific applications, the movable touch panel assembly 10 can be connected to a reset component, which can be a spring or the like.

[0038] Specifically, the dynamic touch panel assembly 10 also includes an elastic component made on the dynamic touch panel 11, and the elastic component includes a positioning card plate 141 and an elastic member 142. The positioning card plate 141 is connected to the mounting slot 132, and the elastic member 142 is located in the mounting slot 132. One end of the elastic member 142 is connected to one side of the positioning card plate 141, and the other end of the elastic member 142 is connected to the other side of the dynamic touch panel 11. The elastic member 142 can be a buffer spring, which can be pre-pressed on the dynamic touch panel 11. The sliding stroke of the dynamic touch panel assembly 10 toward the static contact point 201 can be slightly larger. Through the action of the elastic member 142, the rigid collision between the dynamic contact point 101 and the static contact 201 of the dynamic touch panel 11 can be avoided to cause additional wear.

[0039] Specifically, if Figure 2 、 Figure 5 and Figure 7 As shown, the elastic component also includes a buffer pad 143, which is bonded to the other side of the positioning card 141 through an adhesive 144. The adhesive 144 can be a double-sided tape. The buffer pad 143 is close to the upper end of the mounting column 131, which helps to reduce the noise when the dynamic touch panel assembly 10 is in motion.

[0040] Specifically, the arc extinguishing grid 50 includes two mounting plates 51 arranged in a spaced relationship with each other along a first direction and a plurality of grid plates 52 arranged in parallel and spaced apart. The two ends of the grid plates 52 are respectively connected between the two mounting plates 51. The grid plates 52 are metal grid plates (such as ferromagnetic grid plates or copper grid plates, etc.) or ceramic grid plates, and have a good arc extinguishing effect.

[0041] Specifically, the mounting plate 51 may be a melamine glass cloth plate, which has good insulation properties and relatively high structural strength.

[0042] In this embodiment, the grid plate 52 is a brass grid plate with a nickel-plated surface, which has a good arc extinguishing effect and a long service life.

[0043] Specifically, an arc-quenching grid insulating bracket 60 is disposed within the relay body 100. The arc-quenching grid insulating bracket 60 can be made of plastic, which has low manufacturing costs and excellent insulation performance. The arc-quenching grid insulating bracket 60 is provided with positioning grooves 61 for mounting the magnetic component 30 on opposite sides of the first direction. The arc-quenching grid insulating bracket 60 is provided with two sets of arc-quenching cavities, which can be located on the sidewalls of the positioning grooves 61. Each set of arc-quenching cavities includes two arc-quenching cavities disposed on opposite sides of the static contact 201 and the movable contact 101 along the second direction. The arc-quenching grid 50 is disposed within the arc-quenching cavities and can be located on both sides of the two arc-strike angles 12.

[0044] Specifically, a positioning slot is provided on the side wall of the arc extinguishing chamber, and a positioning protrusion 511 that can extend into the positioning slot is provided on the outer side surface of the mounting plate 51 to facilitate the assembly and positioning of the arc extinguishing grid 50 .

[0045] In this embodiment, the moving touch plate 11 is provided with two moving contacts 101, and each moving contact 101 has two arc-striking angles 12 on both sides, that is, a total of four arc-striking angles 12 are provided on both sides of the moving touch plate 11, and the arc-extinguishing grid insulating bracket 60 is provided with four arc-extinguishing cavities, each arc-extinguishing cavity is provided with an arc-extinguishing grid 50, and each moving contact 101 has the said arc-striking angle 12 on both sides (along the second direction) of the corresponding moving contact plate 11, that is, each moving contact 101 is located between the two arc-striking angles 12, and the two arc-striking angles 12 are located between the two arc-extinguishing grids 50.

[0046] Specifically, the two magnetic members 30 are strong magnets and are arranged facing each other along a first direction. The polarities of the facing ends of the two magnetic members 30 are opposite. In this embodiment, the side of one magnetic member 30 facing the movable contact 101 and the stationary contact 201 is the north pole, and the side of the other magnetic member 30 facing the movable contact 101 and the stationary contact 201 is the south pole.

[0047] Specifically, the upper shell 140 is disposed on the outside of the arc extinguishing cover 40 and is connected to the arc extinguishing grid insulating bracket 60 through a locking member 141 , and the locking member 141 can be a screw.

[0048] Specifically, the static contact plate assembly 20 includes two spaced-apart static contact plates 21 , which can be positioned on either side of the mounting post 131 (along a first direction). Each static contact plate 21 is provided with a static contact 201 . One static contact plate 21 extends from one side of the relay body 100 , while the other extends from the other side. The two terminal connections are spaced far apart, further enhancing safety and reliability. The end of the static contact plate 21 extending from the relay body 100 can serve as a load terminal.

[0049] In specific applications, improved strong magnets can be placed on either side of the moving contact 101 and the stationary contact 201 to achieve nonpolarized magnetic arc extinguishing. Arc striking angles 12 are designed on either side of the moving contact plate 11, and these angles can be adjusted based on actual conditions. In this embodiment, the grid 52 used is a brass nickel-plated metal grid 52. Of course, the material composition of the grid 52 can also be adjusted based on actual conditions. A combination of an open arc extinguishing chamber and nonpolarized magnetic arc extinguishing can be used simultaneously to achieve rapid arc extinguishing.

[0050] In a specific application, the movable touch plate bracket 13 is fixed to the movable yoke 14 via a combination bolt 135. The movable touch plate 11 is placed on the movable touch plate bracket 13, wherein the movable contact 101 is welded to the movable touch plate 11. The elastic member 142 (buffer spring) preloads the movable touch plate 11. The magnetic component 30 is installed in the positioning groove 61 of the arc quenching grid insulating bracket 60. The arc extinguishing cover 40 is adsorbed on the magnetic component 30 and installed in the upper shell 140. The polarities of the two magnetic components 30 are opposite. When the external part of the movable yoke 14 is driven by the electromagnetic force of the coil, it moves longitudinally and downward, and links the movable touch plate 11 and the movable contact 101 with the static contact 201 on the static touch plate assembly 20 to conduct electricity. The arc quenching grid insulating bracket 60 is installed in the upper shell 140 via fixing screws.

[0051] A relay device provided by an embodiment of the present invention, when the load end is turned on, due to the magnetic components 30 (strong magnets) arranged at the upper and lower ends (first direction) of the moving contact 101 and the static contact 201, magnetic blowing out of the arc is achieved under the action of the Lorentz force, and both positive and negative currents can achieve non-polarity arc extinguishing. The arc extinguishing cover 40 is adsorbed on the magnetic component 30 to increase the magnetic field strength within the contact range, and the arc caused by the large current short circuit can be extinguished 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. After the arc enters the arc extinguishing chamber, it is cooled by the arc extinguishing grid 50 to increase the arc resistance. At the same time, the metal particles produced by the load switching are stored to improve the insulation performance between the contacts. The combination of non-polarity current magnetic blowing and the open arc extinguishing grid 50 chamber can extinguish the arc faster, greatly improving the electrical life of the product and improving the insulation performance of the product. It has the ability to disconnect short-circuit currents of more than 20KA (5ms) multiple times, and has good safety and reliability.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A relay device, characterized in that: The relay comprises a relay body, the relay body including a stationary contact plate assembly and a movable contact plate assembly movable to contact the stationary contact plate assembly, the stationary contact plate assembly having stationary contacts spaced apart along a first direction, the movable contact plate assembly having a movable contact for contacting the stationary contacts, the relay body being provided with two magnetic members disposed opposite to each other along the first direction, the stationary contact and the movable contact being located between the two magnetic members; The movable touch panel assembly includes a movable touch panel, a movable touch panel bracket and a movable yoke, the movable touch panel bracket is fixedly connected to the movable yoke, the movable touch panel is connected to the movable touch panel bracket, the movable touch panel bracket has a mounting post, the mounting post has a mounting slot, the movable touch panel passes through the mounting slot and can slide along the mounting slot; the stationary touch panel assembly includes two stationary touch panels arranged at intervals, the two stationary touch panels are arranged on both sides of the mounting post; The inner side of the magnetic component faces the static contact and the movable contact, and the outer side of the magnetic component is connected to an arc extinguishing cover, which forms an enclosure structure surrounding the magnetic component, the movable contact plate assembly, and the static contact plate assembly; The relay body is provided with an arc extinguishing grid and an arc extinguishing grid insulating bracket, and the arc extinguishing grid insulating bracket is provided with positioning grooves for mounting the magnetic component on two opposite sides in the first direction; the arc extinguishing grid insulating bracket is provided with two groups of arc extinguishing cavities, and the arc extinguishing grid is arranged in the arc extinguishing cavities, and each group of arc extinguishing cavities includes two arc extinguishing cavities arranged on both sides of the static contact and the movable contact in a second direction. The relay body comprises an upper shell, which is arranged outside the arc extinguishing cover and connected to the arc extinguishing grid insulating bracket through a locking member.

2. A relay device according to claim 1, characterized in that: The arc-extinguishing cover is magnetically adsorbed on the magnetic component; 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. There are two arc-extinguishing covers, and the two arc-extinguishing covers are arranged facing each other.

3. A relay device according to claim 1, characterized in that: The arc extinguishing grid is arranged on both sides of the static contact and the movable contact along a second direction, the second direction is perpendicular to the first direction, and the arc extinguishing grid is located within the enclosed structure.

4. A relay device according to claim 3, characterized in that: Two moving contacts are provided on one side of the moving contact plate. Arc striking angles are provided on both sides of the moving contact plate. The arc striking angles are located on both sides of the moving contact in the second direction and between the two arc extinguishing grids.

5. A relay device according to claim 4, characterized in that: The dynamic touch panel assembly also includes an elastic component on the dynamic touch panel, and the elastic component includes a positioning card plate and an elastic member. The positioning card plate is connected to the mounting slot, one end of the elastic member is connected to one side of the positioning card plate, and the other end of the elastic member is connected to the other side of the dynamic touch panel.

6. A relay device according to claim 5, characterized in that: The elastic component further includes a buffer pad, which is bonded to the other side of the positioning clamping plate via an adhesive.

7. A relay device according to claim 1, characterized in that: The arc extinguishing grid includes two mounting plates arranged facing each other along a first direction and a plurality of grid plates arranged in parallel and at intervals. The grid plates are connected between the two mounting plates and are metal grid plates or ceramic grid plates.

8. A relay device according to claim 7, characterized in that: The grid is a brass grid with a nickel-plated surface.

9. A relay device according to claim 7, characterized in that: The side wall of the arc extinguishing chamber is provided with a positioning slot, and the outer side surface of the mounting plate is provided with a positioning protrusion that can extend into the positioning slot.

10. A relay device according to any one of claims 1 to 9, characterized in that: The polarities of the facing ends of the two magnetic members are opposite.

11. A relay device according to any one of claims 1 to 9, characterized in that: Each of the static contact plates is provided with a static contact point; one of the static contact plates extends from one side of the relay body, and the other static contact plate extends from the other side of the relay body.

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