Novel elastic sheet auxiliary structure of circular high-voltage direct-current relay

Abstract

The utility model discloses a novel elastic sheet auxiliary structure of a circular high-voltage direct-current relay, which relates to the technical field of relays and comprises a circular iron can, a circular porcelain seat is arranged at the top end of the circular iron can, an inner cover mechanism matched with the circular iron can is arranged at the bottom end of the inner side of the circular porcelain seat, and main static contacts are arranged on two sides of the top end of the circular porcelain seat in a penetrating manner. The two ends of one side of the main static contact penetrate through the circular porcelain seat and are provided with auxiliary contact pins. A coil is arranged at the bottom end of the inner side of the round iron can, and a movable iron core penetrates through the inner side of the coil. According to the utility model, the structure is scientific and novel, the accurate synchronous action of the auxiliary contact and the main contact is realized through the inner cover mechanism and the auxiliary elastic sheet assembly, the auxiliary contact is ensured to synchronously reflect the state when the main contact is closed or opened, a reliable state feedback signal is provided for the relay, and the reliability of the relay is improved. Therefore, the performance of a power system is remarkably improved, and the high-standard requirement in high-voltage direct-current application is met.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a new spring-type auxiliary structure of a circular high-voltage direct current relay. Background Art

[0002] In today's rapidly developing new energy sector, the demand for relays is growing, especially in key applications such as new energy vehicles, charging stations, and energy storage. These applications have extremely strict standards for the reliability, stability, and safety of electrical connections. As an indispensable component of these systems, the performance of high-voltage DC relays directly affects the operating efficiency and safety of the entire system. However, the auxiliary contacts of existing high-voltage DC relays on the market mostly use the old spring-type or micro-switch structure. While these structures can meet basic needs in some applications, their performance is often unsatisfactory when faced with the more stringent operating conditions such as high voltage, high current, and fast switching in high-voltage DC applications such as new energy vehicles. For example, the old spring-type auxiliary contacts may not be able to accurately reflect the status of the main contacts in real time, while the micro-switch type may face insulation and voltage resistance challenges in high-voltage environments.

[0003] For example, Chinese patent CN209729832U discloses a high-voltage DC relay with auxiliary contacts, including a static component, a dynamic component, a yoke iron cylinder, a coil assembly and a magnetic tube, wherein the static component includes two static contacts, and the dynamic component includes a push rod and a dynamic contact seat, which can simplify the implementation of the auxiliary contacts and reduce the cost of the product. However, in the specific application process of the above device, there are the following deficiencies: the auxiliary dynamic contact and the auxiliary static contact in the device are in contact through the old spring-type dynamic spring. However, since the auxiliary contact of the old spring-type dynamic spring cannot fully synchronize the main contact and the auxiliary contact when in use, the auxiliary contact cannot fully play the role of monitoring the main contact with the auxiliary contact. This asynchrony may cause the relay to be unable to cut off or connect the circuit in time when a quick response is required, increasing the risk of system failure.

[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Summary of the Invention

[0005] In response to the problems in the related art, the present invention proposes a new spring-type auxiliary structure for a circular high-voltage DC relay to overcome the above-mentioned technical problems in the existing related art.

[0006] To this end, the specific technical solutions adopted in this utility model are as follows:

[0007] A new shrapnel auxiliary structure for a circular high-voltage DC relay includes a circular iron can, a circular porcelain seat is provided at the top of the circular iron can, an inner cover mechanism that matches the circular iron can is provided at the bottom end of the inner side of the circular porcelain seat, main static contacts are provided on both sides of the top of the circular porcelain seat, and auxiliary pins are provided at both ends of one side of the main static contact through the circular porcelain seat.

[0008] Furthermore, in order to achieve rapid response and precise control of the contact action of the high-voltage DC relay, a coil is provided at the bottom end of the inner side of the circular iron can, a moving iron core is provided through the inner side of the coil, and a push rod is provided through the inner side of the moving iron core; an auxiliary moving contact is provided at the top end of the push rod, an active contact is provided on the outer side of the middle part of the push rod, and an iron sheet fixedly connected to the circular iron can is provided between the active contact and the moving iron core.

[0009] Furthermore, in order to achieve synchronous operation of the main contacts and auxiliary contacts and improve the reliability of relay monitoring, the inner cover mechanism includes an inner cover body arranged at the top of the round iron can, a first circular groove is provided on one side of the top of the inner cover body, and a second circular groove is provided on the other side of the top of the inner cover body; a V-shaped limiting groove is provided in the middle of the top of the inner cover body, an auxiliary spring assembly is provided on the inner side of the V-shaped limiting groove, connecting blocks are provided in the middle of both ends of the V-shaped limiting groove, and a strip-shaped pressure block matching the V-shaped limiting groove is provided on one side of the connecting block; U-shaped pin grooves connected to the V-shaped limiting groove are symmetrically provided at both ends of one side of the inner cover body.

[0010] Furthermore, in order to achieve a high-reliability current switching and state feedback mechanism, the auxiliary spring clip assembly includes a first auxiliary spring clip arranged at one end of the inner side of the V-shaped limit groove, and a second auxiliary spring clip is arranged at the other end of the inner side of the V-shaped limit groove. The first auxiliary spring clip is located at the top of the second auxiliary spring clip, and the first auxiliary spring clip has the same structure as the second auxiliary spring clip; a head U-shaped piece is provided at one end of the first auxiliary spring clip, and a tail L-shaped piece is provided at the other end of the first auxiliary spring clip, and a circular limiting hole is opened in the middle of the first auxiliary spring clip.

[0011] The beneficial effects of the utility model are:

[0012] 1. The structure of this utility model is scientific and novel. Through the inner cover mechanism and the auxiliary spring assembly, the auxiliary contacts and the main contacts can achieve precise synchronous movement. This ensures that when the main contacts are closed or opened, the auxiliary contacts can also immediately reflect this state, providing a reliable status feedback signal for the relay, thereby significantly improving the overall performance of the power system and meeting the high standards required in high-voltage DC applications.

[0013] 2. By setting up the inner cover mechanism, the arc design of the auxiliary spring and the fixing method of the V-shaped limit groove are realized, which provides better elastic recovery and long-term stability, and reduces the poor contact problem caused by mechanical fatigue or wear; at the same time, by improving the head groove of the old spring type, the limitation brought by the inability of the old spring type to fully monitor the main contacts is avoided. The auxiliary contacts of this structure can achieve stable monitoring of more than 500,000 times, ensuring reliability and trouble-free operation in long-term operation.

[0014] 3. By setting the exposed length and welding method of the auxiliary pins, the assembly of the relay and the connection of the external circuit are simplified, and the convenience of maintenance is improved. In addition, the initial distance design between the moving iron core and the iron sheet ensures the synchronization of the main contacts and auxiliary contacts during operation, avoiding monitoring errors caused by asynchronous operation and improving the accuracy and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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.

[0016] Figure 1 This is a structural diagram of a new spring-type auxiliary structure of a circular high-voltage DC relay according to an embodiment of the present utility model;

[0017] Figure 2 This is a top view of a new spring-type auxiliary structure for a circular high-voltage DC relay according to an embodiment of the present utility model;

[0018] Figure 3 This is a cross-sectional view of a new spring-type auxiliary structure of a circular high-voltage DC relay at section AA according to an embodiment of the present utility model;

[0019] Figure 4 This is a cross-sectional view of a new spring-type auxiliary structure of a circular high-voltage DC relay according to an embodiment of the present utility model at section BB;

[0020] Figure 5 This is a structural diagram of an inner cover mechanism in a new spring-type auxiliary structure of a circular high-voltage DC relay according to an embodiment of the present utility model;

[0021] Figure 6 This is a structural schematic diagram from another angle of the inner cover mechanism of a new spring-type auxiliary structure of a circular high-voltage DC relay according to an embodiment of the present utility model;

[0022] Figure 7 yes Figure 5A partial enlarged view of point A in the middle;

[0023] Figure 8 It is a structural schematic diagram of a first auxiliary spring piece in a new spring piece auxiliary structure of a circular high-voltage DC relay according to an embodiment of the present utility model.

[0024] In the picture:

[0025] 1. Auxiliary spring clip assembly; 101. First auxiliary spring clip; 1011. Head U-shaped piece; 1012. Tail L-shaped piece; 1013. Circular limiting hole; 102. Second auxiliary spring clip; 2. Auxiliary moving contact; 3. Main static contact; 4. Active contact; 5. Iron sheet; 6. Push rod; 7. Moving iron core; 8. Coil; 9. Circular porcelain seat; 10. Auxiliary pin; 11. Inner cover mechanism; 1101. Inner cover body; 1102. First circular groove; 1103. Second circular groove; 1104. V-shaped limiting groove; 1105. Connecting block; 1106. Strip pressure block; 1107. U-shaped pin groove; 12. Round iron can. DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] According to an embodiment of the present utility model, a new spring-type auxiliary structure for a circular high-voltage DC relay is provided.

[0028] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figures 1-8 As shown, the new spring clip auxiliary structure of the circular high-voltage DC relay according to the embodiment of the utility model includes a circular iron can 12, a circular porcelain seat 9 is provided at the top of the circular iron can 12, an inner cover mechanism 11 that cooperates with the circular iron can 12 is provided at the bottom end of the inner side of the circular porcelain seat 9, main static contacts 3 are provided on both sides of the top of the circular porcelain seat 9, and auxiliary pins 10 are provided at both ends of one side of the main static contact 3 through the circular porcelain seat 9.

[0029] With the help of the above-mentioned technical solution of the present invention, the structure of the present invention is scientific and novel. Through the inner cover mechanism 11 and the auxiliary spring assembly 1, the precise synchronous action of the auxiliary contact and the main contact is realized, ensuring that when the main contact is closed or opened, the auxiliary contact can also immediately reflect this state, providing a reliable state feedback signal for the relay, thereby significantly improving the performance of the power system and meeting the high standard requirements in high-voltage DC applications.

[0030] In one embodiment, a coil 8 is provided at the bottom end of the inner side of the circular iron can 12, a moving iron core 7 is provided through the inner side of the coil 8, and a push rod 6 is provided through the inner side of the moving iron core 7; an auxiliary moving contact 2 is provided at the top end of the push rod 6, an active contact 4 is sleeved on the outer side of the middle part of the push rod 6, and an iron sheet 5 fixedly connected to the circular iron can 12 is provided between the active contact 4 and the moving iron core 7, thereby achieving rapid response and precise control of the contact action of the high-voltage DC relay.

[0031] The working principle of the above structure is: first, before the coil 8 is energized, the second auxiliary spring piece 102 below and the first auxiliary spring piece 101 above are in a disconnected state; then, when the coil 8 is energized, the moving iron core 7 and the iron sheet 5 are magnetized, generating a magnetic force that attracts each other. Since the iron sheet 5 is fixed, the moving iron core 7 moves upward under the action of the magnetic force and sticks to the iron sheet 5, so that the moving iron core 7 drives the push rod 6, and the push rod 6 drives the active contact 4 and the auxiliary moving contact 2, and the auxiliary moving contact 2 pushes the second auxiliary spring piece 102 below to move upward together; when the active contact 4 contacts the main static contact 3, the auxiliary moving contact 2 pushes the second auxiliary spring piece 102 below to contact the first auxiliary spring piece 101 above.

[0032] The main static contact 3 and the active contact 4 are both main contacts, responsible for passing large currents. When the second auxiliary spring clip 102 below contacts the first auxiliary spring clip 101 above, it becomes an auxiliary contact responsible for monitoring the status of the main static contact 3 and the active contact 4. When the main static contact 3 and the active contact 4 are in the open state, the second auxiliary spring clip 102 below and the first auxiliary spring clip 101 above are also in the open state. When the main static contact 3 and the active contact 4 are in the closed state, the second auxiliary spring clip 102 below and the first auxiliary spring clip 101 above are also in the closed state.

[0033] The initial distance between the moving iron core 7 and the iron sheet 5 is greater than the initial distance between the active contact 4 and the main static contact 3 and between the second auxiliary spring piece 102 below and the first auxiliary spring piece 101 above, so that the main contact and the auxiliary contact are opened and closed synchronously, thereby achieving the purpose of the auxiliary contact feedback to the main contact.

[0034] In one embodiment, the inner cover mechanism 11 includes an inner cover body 1101 arranged at the top of the round iron can 12, a first circular groove 1102 is provided on one side of the top of the inner cover body 1101, and a second circular groove 1103 is provided on the other side of the top of the inner cover body 1101; a V-shaped limiting groove 1104 is provided in the middle of the top of the inner cover body 1101, an auxiliary spring assembly 1 is provided on the inner side of the V-shaped limiting groove 1104, a connecting block 1105 is provided in the middle of both ends of the V-shaped limiting groove 1104, and a strip-shaped pressure block 1106 that cooperates with the V-shaped limiting groove 1104 is provided on one side of the connecting block 1105; U-shaped pin grooves 1107 connected to the V-shaped limiting groove 1104 are symmetrically provided at both ends of one side of the inner cover body 1101, thereby realizing the synchronous operation of the main contacts and the auxiliary contacts, and improving the reliability of relay monitoring.

[0035] In one embodiment, the auxiliary spring clip assembly 1 includes a first auxiliary spring clip 101 arranged at one end of the inner side of the V-shaped limiting groove 1104, and a second auxiliary spring clip 102 is arranged at the other end of the inner side of the V-shaped limiting groove 1104. The first auxiliary spring clip 101 is located at the top of the second auxiliary spring clip 102, and the first auxiliary spring clip 101 has the same structure as the second auxiliary spring clip 102; a head U-shaped piece 1011 is provided at one end of the first auxiliary spring clip 101, and a tail L-shaped piece 1012 is provided at the other end of the first auxiliary spring clip 101, and a circular limiting hole 1013 is opened in the middle of the first auxiliary spring clip 101, thereby realizing a high-reliability current switching and state feedback mechanism.

[0036] In addition, it should be noted that the first auxiliary spring clip 101 and the second auxiliary spring clip 102 have the same structure, are both arc-shaped, and are made of beryllium copper. The first auxiliary spring clip 101 and the second auxiliary spring clip 102 are pressed by the connecting block 1105 and the strip pressure block 1106 and assembled in the V-shaped limit groove 1104; the auxiliary pin 10 is a cylinder (in specific applications, it is made of Kovar material), passes through the circular porcelain seat 9, and is brazed together with a conductive material (in specific applications, it is made of silver copper 28 material). When the product is assembled, the tail L-shaped pieces of the first auxiliary spring clip 101 and the second auxiliary spring clip 102 are respectively interference fit with the two auxiliary pins 10 (the first auxiliary spring clip 101 and the second auxiliary spring clip 102 have the same structure and the same working principle), which can achieve conductivity. After the auxiliary pin 10 is inserted into the circular porcelain seat 9, 0.5 mm is exposed outside the cavity, and the wire can be welded.

[0037] The working principle of the inner cover mechanism 11 is as follows: the inner cover mechanism 11 is composed of an inner cover body 1101, and a first circular groove 1102 and a second circular groove 1103 are designed at the top. These two grooves are used to adapt to the main static contact 3 to ensure the stability of the overall structure. The V-shaped limit groove 1104 in the middle of the top is a key part of the auxiliary spring clip assembly 1, and an auxiliary spring clip assembly 1 is assembled on its inner side. The auxiliary spring clip assembly 1 includes a first auxiliary spring clip 101 and a second auxiliary spring clip 102. They have the same structure, are arc-shaped, and are made of beryllium copper material with good elasticity and conductivity. The first auxiliary spring clip 101 and the second auxiliary spring clip 102 are respectively located at both ends of the V-shaped limit groove 1104, and are fixed in place by a connecting block 1105 and a strip pressure block 1106.

[0038] The operating principle of the auxiliary spring-type assembly 1 is as follows: the movable iron core 7 moves upward and abuts against the iron plate 5. This moves the movable iron core 7, which in turn drives the push rod 6, which in turn drives the auxiliary movable contact 2. The auxiliary movable contact 2 pushes the second auxiliary spring type 102 below it upward. When the second auxiliary spring type 102 below it contacts the first auxiliary spring type 101 above it, the first and second auxiliary spring types 101 and 102 transition from a disconnected state to a conductive state, and the two auxiliary pins 10 also transition from a disconnected state to a conductive state.

[0039] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.

[0040] In actual application, when the coil 8 is energized, the moving iron core 7 drives the active contact 4, the auxiliary moving contact 2 and the second auxiliary spring piece 102 below to move upward at the same time. When the active contact 4 moves to contact the main static contact 3, the second auxiliary spring piece 102 below is also in contact with the first auxiliary spring piece 101 above. That is, when the two main static contacts 3 change from disconnected to conductive, the first auxiliary spring piece 101 and the second auxiliary spring piece 102 also change from disconnected to conductive, and the two auxiliary pins 10 change from disconnected to conductive at the same time, thereby realizing the synchronization of the auxiliary contact and the main contact, and playing the role of the auxiliary contact monitoring the main contact.

[0041] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. 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 new spring-type auxiliary structure for a circular high-voltage DC relay, comprising a circular iron can (12), characterized in that: A circular porcelain seat (9) is provided at the top of the circular iron can (12), an inner cover mechanism (11) matching the circular iron can (12) is provided at the bottom of the inner side of the circular porcelain seat (9), main static contacts (3) are provided through both sides of the top of the circular porcelain seat (9), and auxiliary pins (10) are provided through both ends of one side of the main static contact (3) and through the circular porcelain seat (9).

2. A new spring-type auxiliary structure for a circular high-voltage DC relay according to claim 1, characterized in that: A coil (8) is provided at the bottom end of the inner side of the circular iron can (12), a moving iron core (7) is provided through the inner side of the coil (8), and a push rod (6) is provided through the inner side of the moving iron core (7).

3. A new spring-type auxiliary structure for a circular high-voltage DC relay according to claim 2, characterized in that: An auxiliary moving contact (2) is provided at the top end of the push rod (6), an active contact (4) is sleeved on the outer side of the middle portion of the push rod (6), and an iron sheet (5) fixedly connected to the circular iron can (12) is provided between the active contact (4) and the moving iron core (7).

4. The novel spring-type auxiliary structure for a circular high-voltage DC relay according to claim 1, characterized in that: The inner cover mechanism (11) comprises an inner cover body (1101) arranged at the top end of the round iron can (12), a first circular groove (1102) being provided on one side of the top end of the inner cover body (1101), and a second circular groove (1103) being provided on the other side of the top end of the inner cover body (1101).

5. The new spring-type auxiliary structure for a circular high-voltage DC relay according to claim 4, characterized in that: A V-shaped limiting groove (1104) is provided in the middle of the top of the inner cover body (1101), an auxiliary spring assembly (1) is provided inside the V-shaped limiting groove (1104), connecting blocks (1105) are provided in the middle of both ends of the V-shaped limiting groove (1104), and a strip-shaped pressing block (1106) that matches the V-shaped limiting groove (1104) is provided on one side of the connecting block (1105); U-shaped pin slots (1107) connected to the V-shaped limiting slot (1104) are symmetrically provided at both ends of one side of the inner cover body (1101).

6. The new spring-type auxiliary structure for a circular high-voltage DC relay according to claim 5, characterized in that: The auxiliary spring piece assembly (1) comprises a first auxiliary spring piece (101) arranged at one end inside the V-shaped limiting groove (1104), a second auxiliary spring piece (102) being arranged at the other end inside the V-shaped limiting groove (1104), the first auxiliary spring piece (101) being located at the top end of the second auxiliary spring piece (102), and the first auxiliary spring piece (101) and the second auxiliary spring piece (102) having the same structure.

7. The new spring-type auxiliary structure for a circular high-voltage DC relay according to claim 6, characterized in that: One end of the first auxiliary spring piece (101) is provided with a head U-shaped piece (1011), the other end of the first auxiliary spring piece (101) is provided with a tail L-shaped piece (1012), and a circular limiting hole (1013) is provided in the middle of the first auxiliary spring piece (101).

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