An anti-arc safety relay for charging piles

Abstract

This utility model relates to the field of relay technology, and provides an anti-arc safety relay for charging piles, including a relay housing and a coil installed at the center of the bottom of the housing; an iron core, which is slidably inserted into a through hole running vertically through the center of the coil; a transmission column, which is installed at the top of the iron core; a moving contact assembly, which is installed at the top of the transmission column; and two arc-extinguishing components, which are symmetrically installed on the left and right side walls near the top of the relay housing. This anti-arc safety relay for charging piles, through the scientific layout of multi-layer arc-extinguishing grids, a fast-rebound disconnection mechanism, and a buffer reset design, can effectively suppress and quickly eliminate the arc generated between the moving and stationary contacts, significantly improving the safety performance and service life of the relay.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, specifically to an anti-arc safety relay for charging piles. Background Technology

[0002] Relays, as important electrical control components, are widely used in various automatic control systems. Their main function is to control the on / off state of a circuit through electromagnetic excitation. A traditional relay structure typically includes an electromagnetic coil, a moving contact, and a stationary contact, utilizing the attraction of an electromagnet to close or open the contacts. Due to their simple structure and reliable operation, they are widely used in industrial control, power systems, and communication equipment.

[0003] However, with the widespread adoption and application of new energy equipment such as charging piles, higher requirements have been placed on the safety and reliability of relays. During operation, charging piles involve high-voltage, high-current switching, which can easily generate electric arcs when contacts make or break. Electric arcs not only cause rapid wear and damage to the contacts but can also lead to fires or equipment malfunctions, seriously threatening equipment and personnel safety. Furthermore, prolonged arcing can degrade the internal insulation materials of the relay, reducing its service life.

[0004] Existing relays used in charging piles mostly employ simple mechanical structures and arc-extinguishing measures, making it difficult to effectively control the duration and intensity of the electric arc. While some known solutions incorporate arc-extinguishing components, their effectiveness is limited due to flawed structural design, allowing the arc to persist even at the moment of contact separation, potentially causing contact damage and electrical faults. Furthermore, traditional relays, due to their limited mechanical speed, cannot achieve complete disconnection within a short time during rapid disconnection, resulting in a prolonged arc duration and increased safety hazards.

[0005] Therefore, this solution proposes an anti-arc safety relay for charging piles to solve the above problems. Utility Model Content

[0006] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an anti-arc safety relay for charging piles.

[0007] To achieve the objective, the technical solution of this utility model is as follows: an anti-arc safety relay for charging piles, comprising a relay housing and a coil installed at the center of its bottom;

[0008] The iron core is slidably inserted into the through hole that runs vertically through the center of the coil.

[0009] The transmission column is installed at the top of the iron core;

[0010] Moving contact assembly, which is mounted on the top of the drive column;

[0011] Arc extinguishing components, two of which are symmetrically installed inside the relay housing on the left and right side walls near the top;

[0012] The first stationary contact and the second stationary contact are symmetrically installed on the left and right sides of the top center of the relay housing;

[0013] The quick-return component is installed at the top center of the relay housing and contacts the top of the transmission column.

[0014] Preferably, the moving contact assembly includes:

[0015] The first moving contact and the second moving contact are located directly below the first stationary contact and the second stationary contact, respectively.

[0016] The connecting frame is configured as a horizontally distributed support, with the first moving contact and the second moving contact installed at the left and right ends of the top of the connecting frame, respectively.

[0017] The sliding sleeve is fixedly installed at the center of the connecting frame and connected to the top of the transmission column.

[0018] Preferably, the arc extinguishing assembly includes:

[0019] The suspension is mounted on the inner wall of the relay housing;

[0020] A retaining ring is installed on one end of the inner side of the suspension.

[0021] Arc-extinguishing grids are installed inside the fixing ring. Each arc-extinguishing grid is set as a quarter-circle ring, and four arc-extinguishing grids in each layer form a non-connected ring.

[0022] Preferably, the central perforation of the ring formed by the four arc-extinguishing grid plates is slightly larger than the cross-sectional size of the moving contact.

[0023] Preferably, the quick-rebound component includes:

[0024] The connector is installed at the top center inside the relay housing, and the top of the transmission column slides into the bottom of the connector.

[0025] A spring is installed at the top of the connector tube and its bottom end is pressed against the top of the drive column.

[0026] There are two side perforations, both of which are vertically distributed in long strips on the left and right sides of the insertion tube. The transmission column and the sliding sleeve are connected through the side perforations.

[0027] Preferably, a buffer assembly adapted to the downward rebound of the iron core is installed at the bottom of the central hole of the coil.

[0028] Preferably, the buffer assembly includes two vertically distributed pads and a buffer spring fixed between the upper and lower pads.

[0029] The beneficial effects of this utility model are reflected in:

[0030] The multi-layered arc-extinguishing grid structure effectively suppresses arc generation: Multiple ring-shaped arc-extinguishing grids are arranged inside the relay, forming multiple arc-extinguishing zones between the grids. When the moving contact disengages from the stationary contact, the arc is guided into these multi-layered arc-extinguishing zones, where it is rapidly broken, cooled, and dissipated between the grids. This significantly reduces the duration and intensity of the arc, effectively preventing damage to the contacts and the internal structure of the relay, and improving the safety and reliability of the relay.

[0031] The rapid disconnection mechanism between moving and stationary contacts reduces arc generation: The relay is equipped with a rapid return element, which uses the spring force to quickly push the iron core and transmission column downward at the moment of power failure, enabling the moving contact to quickly disconnect from the stationary contact. This rapid disconnection action significantly shortens the time window for arc generation, further reducing the probability of arc generation and energy release, thus protecting the safety of circuits and equipment.

[0032] The buffer component reduces the impact of the iron core reset and extends its service life: A buffer component is provided at the bottom center of the coil to effectively buffer the impact force of the iron core during rapid reset, avoid severe vibration and wear of the mechanical structure, improve the mechanical stability and service life of the relay, and ensure the reliability of long-term operation.

[0033] The transmission mechanism design ensures the stability and synchronization of mechanical movement: through the side perforation linkage structure of the transmission column and the sliding sleeve, it ensures that the moving contact assembly moves smoothly and synchronously during the lifting process, avoiding poor contact or abnormal wear of the contacts due to mechanical offset, and further improving the performance stability of the relay.

[0034] In summary, this arc-extinguishing safety relay for charging piles, through its scientifically designed multi-layer arc-extinguishing grid, rapid rebound disconnection mechanism, and buffered reset design, effectively suppresses and quickly eliminates the arc generated between moving and stationary contacts, significantly improving the relay's safety performance and service life. Simultaneously, the stable transmission mechanism ensures the accuracy and reliability of contact action, meeting the stringent requirements of high-safety electrical equipment such as charging piles. The overall design of this relay not only enhances the circuit's safety protection capabilities but also optimizes the durability and response speed of the mechanical structure, providing a solid guarantee for the safe operation of charging piles and possessing broad application prospects and promotional value. Attached Figure Description

[0035] In the attached diagram:

[0036] Figure 1This is a schematic diagram of the structure of this utility model in its non-powered operating state;

[0037] Figure 2 This is a schematic diagram of the structure of the present invention in its powered-on state.

[0038] Figure 3 This is a structural schematic diagram of the moving contact integrated component of this utility model;

[0039] Figure 4 This is a schematic diagram of the arc-extinguishing component of this utility model;

[0040] Figure 5 This is a structural schematic diagram of the quick-rebound component of this utility model;

[0041] Figure 6 This is a schematic diagram of the structure of the buffer component of this utility model;

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Relay housing; 2. Coil; 3. Iron core; 4. Transmission column; 5. Moving contact assembly; 6. Arc extinguishing assembly; 7. First stationary contact; 8. Second stationary contact; 9. Quick return element; 10. Buffer assembly;

[0044] 51. First moving contact; 52. Second moving contact; 53. Connecting frame; 54. Sliding sleeve;

[0045] 61. Suspension; 62. Retaining ring; 63. Arc-extinguishing grid plate;

[0046] 91. Insertion tube; 92. Rebound spring; 93. Side perforation hole;

[0047] 101. Gasket; 102. Buffer spring. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the utility model without creative effort are within the scope of protection of the utility model.

[0049] It should be noted that if the utility model embodiment involves directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0050] Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the utility model.

[0051] Please refer to the instruction manual appendix. Figures 1-6 This utility model provides an anti-arc safety relay for charging piles. The relay includes a relay housing 1 and a coil 2 installed at the center of its bottom, forming an electromagnetic excitation part. A through hole is provided at the center of the coil 2, and an iron core 3 is slidably inserted into the through hole. When energized, the coil 2 generates a magnetic field, driving the iron core 3 to move vertically. A transmission post 4 is installed at the top of the iron core 3, and a moving contact integrated component 5 is installed at the top of the transmission post 4.

[0052] The moving contact assembly 5 includes a first moving contact 51 and a second moving contact 52, which are located directly below the first stationary contact 7 and the second stationary contact 8, respectively, forming a contact pair. The first stationary contact 7 and the second stationary contact 8 are symmetrically installed on the left and right sides of the top center of the relay housing 1. The first moving contact 51 and the second moving contact 52 are fixed to the left and right ends of the top of the connecting frame 53, which is horizontally distributed as a whole. The sliding sleeve 54 is fixedly installed at the center of the connecting frame 53 and connected to the top of the transmission column 4, so that when the transmission column 4 rises and falls, it can drive the entire moving contact assembly 5 to rise and fall, thereby realizing the operation of contacting and disconnecting the moving and stationary contacts.

[0053] Arc-extinguishing components 6 are symmetrically installed on the left and right sidewalls near the top of the relay housing 1. The arc-extinguishing components 6 include a suspension 61, a fixing ring 62, and arc-extinguishing grid plates 63. The suspension 61 is fixed to the inner sidewall of the relay housing 1, and the fixing ring 62 is installed at one end of the inner side of the suspension 61. Several arc-extinguishing grid plates 63 are installed inside the fixing ring 62. Each arc-extinguishing grid plate 63 is a quarter-circular ring, and four arc-extinguishing grid plates 63 are arranged to form a non-connected ring, configured as a multi-layered ring structure to form an effective arc-extinguishing area. The central perforation of this ring is slightly larger than the cross-sectional size of the moving contact. This design allows the moving contact to pass through and contact the stationary contact. Simultaneously, when the moving contact leaves the stationary contact, it returns to the cylindrical arc-extinguishing area enclosed by the multi-layered arc-extinguishing grid plates 63, thus achieving arc extinguishing.

[0054] The quick-return component 9 is installed at the top center of the relay housing 1, and specifically includes a connector 91, a return spring 92, and a side through hole 93. The connector 91 is fixedly installed at the top center of the relay housing 1, and the top of the transmission column 4 is slidably inserted into the bottom of the connector 91. The return spring 92 is located at the top of the connector 91, and its bottom end is pressed against the top of the transmission column 4. When the coil is not energized, the spring 92 quickly pushes the transmission column 4 and the iron core 3 downward to reset, at which time the moving and stationary contacts are quickly disconnected, thereby effectively reducing the generation of electric arc. The connector 91 has two vertically distributed elongated side through holes 93 on the left and right sides. The transmission column 4 and the sliding sleeve 54 are connected through the side through holes 93, allowing the transmission column 4 to move in conjunction with the sliding sleeve 54 through the side through holes 93 during the lifting and lowering process, ensuring the stability and synchronization of mechanical movement.

[0055] A buffer assembly 10 is provided at the bottom of the central hole of coil 2 to accommodate the downward rebound of iron core 3. The buffer assembly 10 includes two distributed pads 101 and a buffer spring 102 fixed between the two pads 101. Its function is to buffer the sudden movement of iron core 3 during reset, reduce mechanical impact, and extend the service life of the structure.

[0056] Working principle:

[0057] When the arc-resistant safety relay of the charging pile is energized, the current in coil 2 excites and generates a magnetic field, driving the iron core 3 to move vertically upward. As the iron core 3 rises, the transmission column 4 connected to its top also rises, causing the first moving contact 51 and the second moving contact 52 in the moving contact assembly 5 to rise and contact the corresponding first stationary contact 7 and the second stationary contact 8, respectively, completing the contact closure and realizing the circuit conduction. During the conduction process, the moving contact passes through the arc-extinguishing area formed by the multi-layer arc-extinguishing grid plate 63 through the transmission column 4, effectively suppressing the generation of arcs and ensuring the safety of contact.

[0058] When the relay is de-energized, the current in coil 2 is eliminated, and the magnetic field disappears. At this time, the spring 92 inside the quick-return component 9 quickly pushes the transmission column 4 and the iron core 3 to reset vertically downwards, thereby rapidly disconnecting the first moving contact 51 and the second moving contact 52 from the first stationary contact 7 and the second stationary contact 8. During the downward movement, the first moving contact 51 and the second moving contact 52 slide down through the annular arc-extinguishing area formed by the arc-extinguishing grid plate 63, quickly extinguishing the arc and ensuring safety.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0060] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0061] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An anti-arc safety relay for a charging pile, comprising a relay housing (1) and a coil (2) installed at the center of its bottom, characterized in that: Iron core (3), the iron core (3) is slidably inserted into the through hole that runs vertically through the center of the coil (2); A transmission column (4) is installed at the top of the iron core (3); Moving contact assembly (5), which is mounted on the top of the transmission column (4); Arc extinguishing assembly (6), two of which are symmetrically installed inside the relay housing (1) near the top left and right side walls; The first stationary contact (7) and the second stationary contact (8) are symmetrically installed on the left and right sides of the top center of the relay housing (1); The quick-return component (9) is installed at the top center of the relay housing (1) and contacts the top of the transmission column (4).

2. The anti-arc safety relay for charging pile according to claim 1, characterized in that, The moving contact assembly (5) includes: The first moving contact (51) and the second moving contact (52) are located directly below the first stationary contact (7) and the second stationary contact (8), respectively. The connecting frame (53) is configured as a horizontally distributed support, and the first moving contact (51) and the second moving contact (52) are respectively installed at the left and right ends of the top of the connecting frame (53); The sliding sleeve (54) is fixedly installed at the center of the connecting frame (53) and connected to the top of the transmission column (4).

3. The anti-arcing safety relay for charging piles according to claim 1, characterized in that, The arc-extinguishing component (6) includes: Suspension (61), said suspension (61) is mounted on the inner wall of the relay housing (1); A fixing ring (62) is installed on one end of the inner side of the suspension (61); Arc-extinguishing grid plate (63), there are several arc-extinguishing grid plates (63) installed inside the fixing ring (62), each arc-extinguishing grid plate (63) is set as a quarter ring, and four arc-extinguishing grid plates (63) in each layer form a non-connected ring.

4. The anti-arc safety relay for charging pile according to claim 3, characterized in that, The central perforation of the ring formed by the four arc-extinguishing grid plates (63) is slightly larger than the cross-sectional size of the moving contact.

5. The anti-arcing safety relay for charging piles according to claim 1, characterized in that, The quick-rebound component (9) includes: The connector (91) is installed at the top center inside the relay housing (1), and the top end of the transmission column (4) is slidably inserted into the bottom end of the connector (91). A rebound spring (92) is installed inside the insertion tube (91) with its top end pressed against the top end of the transmission column (4); Side perforation (93): There are two side perforations (93), both of which are vertically distributed and located on the left and right sides of the insertion tube (91). The transmission column (4) and the sliding sleeve (54) are connected through the side perforations (93).

6. The anti-arcing safety relay for charging piles according to claim 1, characterized in that, The bottom of the coil (2) is fitted with a buffer assembly (10) that adapts to the downward rebound of the iron core (3).

7. The anti-arcing safety relay for charging piles according to claim 6, characterized in that, The buffer assembly (10) comprises two upper and lower gaskets (101) and a buffer spring (102) fixed between the upper and lower gaskets (101).

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