High-voltage direct-current relay

Abstract

The utility model relates to the field of relays, and provides a high-voltage direct-current relay, which comprises a shell which is internally sealed and is filled with inert gas, a power connection contact part arranged at the top in the shell and a magnetic attraction action part arranged at the bottom in the shell, and the magnetic attraction action part is used for driving the power connection contact part to be communicated for power connection after power connection; the magnetic attraction action part comprises a magnet yoke unit and an iron core unit arranged in the magnet yoke unit, and the magnet yoke unit comprises a U-shaped magnet yoke and a fixed magnet yoke covering an opening of the U-shaped magnet yoke; the side edge of the bending part of the U-shaped magnet yoke is provided with a bending gap, and the bottom plate part of the U-shaped magnet yoke is of a polygonal structure. The U-shaped magnet yoke adopts two structural designs, namely, the bottom plate is of a polygonal structure design, so that the U-shaped magnet yoke can be conveniently bent and produced, and the production difficulty is reduced. And the two side plates of the U-shaped magnet yoke are designed to be folded, so that the space between the two side plates is similar to a circle, more coil turns can be accommodated, the electromagnetic performance of the magnet yoke is enhanced, and the overall working efficiency of the relay is improved.

Description

Technical Field

[0001] This utility model relates to the field of relays, specifically to a high-voltage DC relay. Background Technology

[0002] A relay, also known as an electronic relay, is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits and is essentially an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] However, existing relays suffer from design flaws. For example, high wiring torque can easily lead to separation of welded or bonded contact terminals, compromising sealing, causing leakage of the internal inert gas, and reducing the relay's safety or even causing it to burn out. Alternatively, the reliability of the contact connection between contacts may be insufficient; single-point connections are prone to poor contact after a period of use. Furthermore, the design of the magnetic yoke may prioritize simplicity in manufacturing processes, resulting in reduced electromagnetic performance of the iron core; conversely, ensuring the electromagnetic performance of the iron core may complicate manufacturing processes and increase production costs. To address these issues, this invention proposes a structurally optimized high-voltage DC relay to overcome the shortcomings of existing high-voltage DC relays. Utility Model Content

[0004] The purpose of this utility model is to provide a high-voltage DC relay, which aims to improve the problems of insufficient structural stability or poor switching performance of existing high-voltage DC relays.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-voltage DC relay, comprising a housing sealed inside and filled with inert gas, a contact head disposed at the top inside the housing, and a magnetic actuation part disposed at the bottom inside the housing, wherein the magnetic actuation part is used to drive the contact head to connect to the power supply after being connected to the power supply.

[0006] The magnetic attraction mechanism includes a magnetic yoke unit and an iron core unit disposed within the magnetic yoke unit. The magnetic yoke unit includes a U-shaped magnetic yoke and a fixed magnetic yoke covering the opening of the U-shaped magnetic yoke.

[0007] The U-shaped magnetic yoke has a bending notch on the side of the bend, and the bottom plate of the U-shaped magnetic yoke has a polygonal structure.

[0008] Preferably, the base plate of the U-shaped magnetic yoke is square, and the side of the U-shaped magnetic yoke is bent inward at the part of the bending notch; the top surface of the side of the U-shaped magnetic yoke is provided with a limiting groove for engaging the fixed magnetic yoke.

[0009] Preferably, the core unit includes an iron core, a coil frame sleeved outside the iron core, and a coil wound on the coil frame. The housing is provided with a circuit board electrically connected to the coil, and the contact head is electrically connected to the circuit board.

[0010] Preferably, the contact head includes a main circuit moving contact, a contact spring disposed between the main circuit moving contact and the magnetic attraction part, and two contact terminals disposed on the housing at intervals from the main circuit moving contact. The top of the core unit is provided with a first support member for placing the contact spring.

[0011] Preferably, at least two protruding structures for electrical connection with the contact terminal are provided on one end of the top surface of the main circuit moving contact.

[0012] Preferably, the contact head further includes an auxiliary moving contact, a protective member for mounting the auxiliary moving contact, and a second support member connecting the protective member and the first support member, and the housing is provided with two auxiliary stationary contacts spaced apart from the auxiliary moving contact.

[0013] Preferably, one end of the top surface of the auxiliary moving contact is provided with a bifurcated structure for making abutting electrical connection with the auxiliary stationary contact.

[0014] Preferably, a contact cavity is provided on one end face of the contact terminal, and an anti-torsion shaft section is provided in the middle of the contact terminal to prevent the adhesive from separating when it is twisted.

[0015] Preferably, the anti-torsion shaft segment has a polygonal groove structure, a protrusion structure, or a planar structure.

[0016] Preferably, the housing has a permanent magnet on the side wall of the contact head, and the housing has a plurality of ribs on the inner side of the contact head.

[0017] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0018] 1. When the magnetic attraction mechanism is energized, it can respond quickly and drive the contact head to move through the magnetic attraction force, so as to realize the top contact of the contact structure of the high voltage DC relay to achieve the effect of energization, thereby realizing the rapid switching of high voltage DC power.

[0019] 2. This utility model's U-shaped magnetic yoke employs two structural designs: the base plate has a polygonal structure to facilitate bending and reduce manufacturing difficulty; the side plates of the U-shaped yoke are folded to create a near-circular space between them, accommodating more coil turns, enhancing the yoke's electromagnetic performance, and improving the overall efficiency of the relay. This allows for… Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the high-voltage DC relay described in this utility model;

[0021] Figure 2 This is a cross-sectional view of the high-voltage DC relay described in this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the power contact head of the high-voltage DC relay described in this utility model;

[0023] Figure 4 This is a partial view of the high-voltage DC relay described in this utility model;

[0024] Figure 5 This is a partial exploded view of the high-voltage DC relay described in this utility model;

[0025] Figure 6 This is a partial view of the magnetic attraction mechanism of the high-voltage DC relay described in this utility model;

[0026] Figure 7 This is a schematic diagram of the contact terminals of the high-voltage DC relay described in this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Housing; 11. Circuit board; 12. Permanent magnet; 13. Rib;

[0029] 20. Electrical contact head; 21. Main circuit moving contact; 22. Contact spring; 23. Contact terminal; 24. Auxiliary moving contact; 25. Protective component; 26. Second support component; 27. Auxiliary stationary contact;

[0030] 211. Protruding structure;

[0031] 231. Electrical connection cavity; 232. Anti-torsion shaft section;

[0032] 241. Bifurcation structure;

[0033] 30. Magnetic attraction mechanism; 31. Magnetic yoke unit; 32. Iron core unit;

[0034] 311. U-shaped magnetic yoke; 312. Fixed magnetic yoke;

[0035] 3111, Bending notch; 3112, Polygonal structure; 3113, Limiting groove; 3114, Bending structure; 321, Iron core; 322, Coil frame; 323, Coil; 324, First support component. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 this utility model and are not intended to limit this utility model.

[0037] Additionally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element of this utility model must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] When an element is referred to as being "fixed to," "set on," or "contained on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to," it can be directly connected to or indirectly connected to that other element.

[0039] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, this embodiment provides a high-voltage DC relay, including a housing 10 internally sealed and filled with inert gas, a contact head 20 disposed at the top inside the housing 10, and a magnetic actuation part 30 disposed at the bottom inside the housing 10. The magnetic actuation part 30 is used to drive the contact head 20 to connect to the power supply after power is applied. The magnetic actuation part 30 includes a yoke unit 31 and an iron core unit 32 disposed inside the yoke unit 31. The yoke unit 31 includes a U-shaped yoke 311 and a fixed yoke 312 covering the opening of the U-shaped yoke 311. A bending notch 3111 is provided on the side of the bend of the U-shaped yoke 311, and the bottom plate of the U-shaped yoke 311 is a polygonal structure 3112.

[0041] High-voltage DC relays are devices used to effectively control high-voltage DC power in power systems. Their structural design not only ensures the stability of electrical performance but also improves the response speed and reliability of the equipment. Specifically, after the magnetic actuation unit 30 is energized, it responds quickly and, through the action of magnetic force, drives the contact head 20 to actuate, achieving the top-abutment contact of the high-voltage DC relay's contact structure to achieve the effect of energization, thereby realizing rapid switching of high-voltage DC power.

[0042] Furthermore, the sealed design within the housing 10 ensures that the inert gas filling the housing 10 remains stable and leak-free, which helps improve the breakdown resistance and arc extinguishing performance of the high-voltage DC relay and ensures safety when operating in a high-voltage environment.

[0043] Furthermore, the magnetic attraction mechanism 30, through the magnetic attraction force of the iron core unit 32, can precisely control the opening and closing of the contact head 20, reducing mechanical wear and extending service life. Simultaneously, the design of the magnetic yoke unit 31 effectively concentrates magnetic force, constraining the magnetic lines of force generated by the induction coil 323 to radiate outwards, concentrating the magnetic force bundle around the induction coil 323, thereby improving magnetic attraction efficiency and ensuring stable operation of the relay under high-voltage DC conditions. In addition, the polygonal base plate design enhances structural rigidity and is simple in structure and manufacturing process, reducing production costs. Furthermore, based on the polygonal magnetic yoke, the "encircling" structure on both sides (i.e., the side plates of the U-shaped magnetic yoke 311) and the bending notch 3111 allow for bending of the side plates, providing sufficient space for wiring in the coil 323 of the iron core unit 32, resulting in a compact and orderly coil 323 layout. Subsequently, a limiting groove 3113 is designed on the top of the U-shaped magnetic yoke 311 to install and fix the magnetic yoke 312 (the fixed magnetic yoke 312 is a sheet or plate structure), thus forming a stable fixation for the iron core unit 32.

[0044] While ensuring magnetic induction intensity and mating flatness, the processing technology is greatly simplified and the processing difficulty is reduced. It takes into account the high space utilization of the circular magnetic yoke (i.e., the two side plates of the U-shaped magnetic yoke 311 form a near-circular space) and also takes into account the convenience of manufacturing the square magnetic yoke (i.e., the base plate of the U-shaped magnetic yoke 311 is polygonal, such as a square structure).

[0045] Furthermore, such as Figure 5 and Figure 6 As shown, in this embodiment, the base plate of the U-shaped magnetic yoke 311 is square, and the side of the U-shaped magnetic yoke 311 is bent inwards at the portion aligned with the bending notch 3111, forming a bending structure 3114. A limiting groove 3113 for engaging and fixing the magnetic yoke 312 is provided on the top surface of the side of the U-shaped magnetic yoke 311. The inward bending structure 3114 on the side of the U-shaped magnetic yoke 311 creates a near-circular space between the magnetic plates on both sides, satisfying the magnetic induction intensity requirement while improving space utilization and ensuring efficient operation of the relay under high-voltage conditions. The square base plate design facilitates the production of the U-shaped magnetic yoke 311, reducing production difficulty and improving production efficiency.

[0046] like Figure 2 As shown, in this embodiment, the core unit 32 includes a core 321, a coil frame 322 sleeved on the core 321, and a coil 323 wound on the coil frame 322. The housing 10 is provided with a circuit board 11 that is electrically connected to the coil 323. The contact head 20 is electrically connected to the circuit board 11. A terminal can be designed on the circuit board 11 to form a connector, such as a socket of a bent pin structure, which can be plugged into an external power supply.

[0047] Specifically, the magnetic force of coil 323 drives the iron core 321 to move, which in turn drives the opening and closing of the contact head 20, thus enabling the high-voltage DC relay to conduct. After power is cut off, the iron core 321 loses its magnetic force, and the contact head 20 quickly separates, ensuring reliability in the power-off state. Furthermore, the design of circuit board 11 facilitates the power supply to the high-voltage DC relay, optimizes the circuit layout, reduces electromagnetic interference, and improves the relay's response speed and stability.

[0048] Furthermore, the iron core 321 can adopt a hollow structure design, with a push rod and spring installed inside the hollow cavity. The push rod is linked to the contact head 20, and the spring provides a restoring force when the power is off, ensuring that the contact head opens quickly and enhancing the reliability of the power-off state. The hollow iron core 321 design also reduces the overall weight, improves the dynamic response performance of the relay, and extends its service life.

[0049] like Figure 3 and Figure 4As shown, in this embodiment, the contact head 20 includes a main circuit moving contact 21, a contact spring 22 disposed between the main circuit moving contact 21 and the magnetic attraction action part 30, and two contact terminals 23 disposed on the housing 10 at intervals from the main circuit moving contact 21. The top of the iron core unit 32 is provided with a first support member 324 for placing the contact spring 22.

[0050] Specifically, the moving contact 21 in the main circuit abuts against the contact terminal 23 to conduct electricity, while the contact spring 22 provides stable contact pressure to ensure reliable current transmission. Under the action of the magnetic attraction unit 30, the moving contact responds quickly and moves toward the contact terminal 23 to achieve rapid conduction. When power is off, the contact spring 22 quickly rebounds, and the moving contact 21 in the main circuit separates from the contact terminal 23, ensuring rapid switching between power-off states. The electric arc generated during switching can be quickly extinguished by the inert gas in the housing 10, avoiding damage to the contacts from the arc and further improving the safety and service life of the relay. At the same time, the housing 10 is made of high-strength materials (such as ceramic materials), which enhances the relay's voltage resistance and ensures its stable operation in high-voltage environments.

[0051] In this embodiment, the first support member 324 is used to fix the contact spring 22 so as to achieve synchronous movement with the iron core unit 32, ensuring that the contact spring 22 maintains stable movement during the magnetic attraction process, so as to install the electrical contact head 20 and improve the stability of the structure.

[0052] Furthermore, in this embodiment, at least two raised structures 211 for electrical connection with the contact terminal 23 are provided on one end of the top surface of the main circuit moving contact 21. Thus, one end of the main circuit moving contact 21 is designed and installed to align with one contact terminal 23. The contact spring 22 can be designed in the middle of the main circuit moving contact 21 to balance the pressure distribution on both sides and ensure uniform contact. Moreover, the design of multiple raised structures 211 can form multiple points of contact with the contact terminal 23, increasing the number of contact points and improving the stability of the connection. At the same time, the raised structures 211 can effectively disperse the current density, reduce local overheating, and extend the contact life.

[0053] Furthermore, the raised structure 211 can be arranged in a longitudinal and transverse manner, or in a fork-shaped structure, or in a raised dot structure, etc., to form multi-point contact with different structures and ensure the stability of the electrical connection.

[0054] like Figure 3 and Figure 4 As shown, in this embodiment, the contact head 20 also includes an auxiliary moving contact 24, a protective member 25 for mounting the auxiliary moving contact 24, and a second support member 26 connecting the protective member 25 and the first support member 324. The housing 10 is provided with two auxiliary stationary contacts 27 that are spaced apart from the auxiliary moving contact 24.

[0055] Specifically, through the coordinated action of the protective component 25 and the second support component 26, the auxiliary moving contact 24 is mounted on the first support component 324. In this way, it can be driven synchronously by the magnetic actuation part 30, so that the auxiliary moving contact 24 and the main circuit moving contact 21 can be energized synchronously, thereby ensuring the coordination and consistency of the overall contact system and improving the response speed and stability of the relay.

[0056] like Figure 4 As shown, in this embodiment, a bifurcated structure 241 for making a top-to-bottom electrical connection with the auxiliary stationary contact 27 is provided on one end of the top surface of the auxiliary moving contact 24. The design of the bifurcated structure 241 can form multiple contact points, such as two bifurcations, three bifurcations, or four bifurcations, to ensure the stability of the connection, effectively disperse the current density, reduce local overheating, and extend the service life of the contact.

[0057] like Figure 3 and Figure 7 As shown, in this embodiment, a contact cavity 231 is provided on one end face of the contact terminal 23, and an anti-torsion shaft section 232 is provided in the middle of the contact terminal 23 to prevent the adhesive from separating when it is twisted. The anti-torsion shaft section 232 is a polygonal groove structure, a protrusion structure 211, or a planar structure, which can effectively prevent the adhesive from falling off during the twisting process of the terminal and ensure the reliability of the contact terminal 23 connection.

[0058] Specifically, when the anti-torsion shaft section 232 is designed as a polygon, its corners can effectively embed the adhesive, thus forming a strong mechanical bond when bonded to the through hole on the housing 10, preventing loosening due to torsion. At the same time, the polygonal structure 3112 can also disperse stress, avoid stress concentration points, and further improve the overall stability of the contact post 23.

[0059] Furthermore, the through-hole on the housing 10 is also designed with a polygonal structure 3112, which allows for precise matching with the anti-torsion shaft section 232, enhancing the tightness of the connection and ensuring anti-torsion performance. The polygonal design of the anti-torsion shaft section 232 not only improves mechanical strength but also optimizes the distribution of adhesive, ensuring that it does not detach during long-term use. In addition, the precise fit between the polygonal structure 3112 of the through-hole on the housing 10 and the anti-torsion shaft section 232 further enhances the stability of the connection, effectively preventing loosening caused by torsion, thereby ensuring the reliability and safety of the entire contact system.

[0060] Furthermore, the outline shape of the anti-torsion shaft section 232 and the through hole that mates with it on the housing 10 can be non-circular, such as gear-shaped structure, polygonal structure 3112, groove structure, single-plane structure or double-plane structure, etc., to ensure that after the filler adhesive is used for bonding, it is not easy for loosening or separation caused by torsion to occur, thereby improving the stability of the structural assembly.

[0061] like Figure 2 As shown, in this embodiment, a permanent magnet 12 is provided on the side wall of the contact head 20 of the housing 10, and multiple ribs 13 are provided on the inner side of the contact head 20 of the housing 10. The design of the permanent magnet 12 can attract the electric arc generated when the contact head 20 is opened and closed, thereby effectively reducing the erosion of the contact by the electric arc; at the same time, the design of the ribs 13 can increase the creepage distance of the electric arc attracted to that position, achieving a highly efficient arc extinguishing effect, further extending the service life of the contact and improving the overall performance of the relay. In addition, the synergistic effect of the permanent magnet 12 and the ribs 13 optimizes the arc control and ensures the stable operation of the relay in a high-voltage environment. The cooperation of the permanent magnet 12 and the ribs 13 cleverly utilizes the interaction between magnetic force and electric arc to achieve precise control of the electric arc, ensuring the reliability and safety of the relay in a high-voltage environment.

[0062] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high-voltage DC relay, characterized in that, It includes an internally sealed housing filled with inert gas, an electrical contact head disposed at the top inside the housing, and a magnetic actuation part disposed at the bottom inside the housing. The magnetic actuation part is used to drive the electrical contact head to connect to the power supply after power is applied. The magnetic attraction mechanism includes a magnetic yoke unit and an iron core unit disposed within the magnetic yoke unit. The magnetic yoke unit includes a U-shaped magnetic yoke and a fixed magnetic yoke covering the opening of the U-shaped magnetic yoke. The U-shaped magnetic yoke has a bending notch on the side of the bend, and the bottom plate of the U-shaped magnetic yoke has a polygonal structure.

2. The high-voltage DC relay according to claim 1, characterized in that: The base plate of the U-shaped magnetic yoke is square, and the side of the U-shaped magnetic yoke is bent inward at the part of the bending notch. The top side of the U-shaped magnetic yoke is provided with a limiting groove for engaging the fixed magnetic yoke.

3. The high-voltage DC relay according to claim 1 or 2, characterized in that: The core unit includes an iron core, a coil frame sleeved outside the iron core, and a coil wound on the coil frame. The housing is provided with a circuit board electrically connected to the coil, and the contact head is electrically connected to the circuit board.

4. The high-voltage DC relay according to claim 1, characterized in that: The contact head includes a main circuit moving contact, a contact spring disposed between the main circuit moving contact and the magnetic attraction part, and two contact terminals disposed on the housing at intervals from the main circuit moving contact. The top of the core unit is provided with a first support for placing the contact spring.

5. The high-voltage DC relay according to claim 4, characterized in that: The main circuit moving contact has at least two raised structures on one end of its top surface for electrical connection with the contact terminal.

6. The high-voltage DC relay according to claim 4, characterized in that: The contact head also includes an auxiliary moving contact, a protective component for mounting the auxiliary moving contact, and a second support component connecting the protective component and the first support component. The housing is provided with two auxiliary stationary contacts that are spaced apart from the auxiliary moving contact.

7. The high-voltage DC relay according to claim 6, characterized in that: The auxiliary moving contact has a bifurcated structure on one end of its top surface for making abutting electrical connection with the auxiliary stationary contact.

8. The high-voltage DC relay according to claim 4, characterized in that: A contact cavity is provided on one end face of the contact terminal, and an anti-torsion shaft section is provided in the middle of the contact terminal to prevent the adhesive from separating when it is twisted.

9. The high-voltage DC relay according to claim 8, characterized in that: The anti-torsion shaft section has a polygonal groove structure, a protrusion structure, or a planar structure.

10. The high-voltage DC relay according to claim 1, characterized in that: The housing has a permanent magnet on the side wall of the electrical contact head, and the housing has a plurality of raised ribs on the inner side of the electrical contact head.

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