Lightning protection relay contact structure and method

Abstract

According to the lightning protection relay contact structure and method, in the structure, a first moving contact fixed conductive component is movably arranged in a fixed support in a penetrating mode, a conductive connecting component is arranged at the end of the moving contact fixed conductive component, and a second moving contact fixed conductive component is connected with the conductive connecting component; the current direction in the second moving contact fixed conductive member is opposite to the current direction in the first moving contact fixed conductive member, the moving contact flexible connection member is flexibly connected to one end, far away from the conductive connection member, of the second moving contact fixed conductive member, and one end of the moving contact rotating member is connected with the moving contact flexible connection member. The moving contact rotating member extends outwards between the first moving contact fixed conductive member and the second moving contact fixed conductive member, the moving contact rotating member can rotate relative to the second moving contact fixed conductive member, and the moving contact silver point member is arranged at the other end, far away from the moving contact flexible connection member, of the moving contact rotating member. The static silver point component is arranged on the static conducting strip and is opposite to the moving contact silver point component.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a lightning protection relay contact structure and method. Background Art

[0002] In order to improve the short-term current tolerance of the contacts of relays currently on the market, the contact force is generally increased. However, this design reduces the mechanical life of the relay and increases the difficulty of electromagnet design. This is especially true in applications where strict requirements are placed on the size of the relay. The traditional contact structure design can hardly meet the functional and volume requirements.

[0003] On the other hand, in order to improve the breaking capacity, current relays generally use permanent magnet arc blowing to improve the arc extinguishing characteristics, but there are strict regulations on current reversal. This design greatly restricts the application scope of the product.

[0004] In addition, the use of permanent magnets for arc blowing will increase the volume on the one hand, and on the other hand, it has certain requirements on the temperature resistance of the permanent magnets. Because permanent magnets will have a certain degree of demagnetization under high temperature conditions, permanent magnets with higher temperature resistance must be selected. Although there are similar permanent magnets on the market, they are very unfavorable for the cost of controlling relays and are not suitable for large-scale mass production applications.

[0005] The information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0006] In view of the shortcomings or defects of the prior art, a lightning protection relay contact structure and method are provided, so that the relay has the characteristics of short-time withstand current and high segmentation against lightning impulse.

[0007] The purpose of the present invention is achieved through the following technical solutions.

[0008] A lightning protection relay contact structure includes: Fixed support; A moving contact member is arranged on the fixed support, and the moving contact member comprises: The first moving contact is a fixed conductive member, which is movably arranged in the fixed support. A conductive connecting member, which is arranged at the end of the movable contact fixed conductive member, a second moving contact fixed conductive member, which is connected to the conductive connection member, and the current direction in the second moving contact fixed conductive member is opposite to the current direction in the first moving contact fixed conductive member, a movable contact soft connection member, which is flexibly connected to an end of the second movable contact fixed conductive member away from the conductive connection member, a moving contact rotating member, one end of which is connected to the moving contact soft connecting member, so that the moving contact rotating member extends outward between the first moving contact fixed conductive member and the second moving contact fixed conductive member and the moving contact rotating member is rotatable relative to the second moving contact fixed conductive member, A moving contact silver point component, which is arranged at the other end of the moving contact rotating component away from the moving contact soft connection component; A stationary contact component is arranged on the fixed support, and the stationary contact component comprises: a static conductive sheet, which is arranged on the fixed support, A static silver point component is arranged on the static conductive sheet and opposite to the moving contact silver point component.

[0009] In the lightning protection relay contact structure, the moving contact rotating member has a first arc-starting portion arranged at the other end portion away from the moving contact soft connection member, and the static conductive sheet has a second arc-starting portion opposite to the first arc-starting portion.

[0010] In the lightning protection relay contact structure, the first arc-starting portion and the second arc-starting portion are sheet-like structures that are inclined outwards toward each other.

[0011] In the lightning protection relay contact structure, the moving contact rotating component is rotatably connected to the second moving contact fixed conductive component through multiple contacts.

[0012] In the lightning protection relay contact structure, the rotating pair of the moving contact rotating member is rotatably connected to the second moving contact fixed conductive member.

[0013] In the lightning protection relay contact structure, when the relay is opened, an electric force is generated to push the arc upward, and the direction of the electric force is independent of the current passing through the relay.

[0014] In the lightning protection relay contact structure, the moving contact rotating component is provided with a through groove penetrating the conductive connecting component.

[0015] In the lightning protection relay contact structure, the direction of the current passing through the movable contact rotating component and the first movable contact fixed conductive component is the same.

[0016] In the lightning protection relay contact structure, the electromotive force between the moving contact rotating member and the second moving contact fixed conductive member is a repulsive force F 35 The electromotive force between the moving contact rotating member and the first moving contact fixed conductive member is the suction force F 15 , the repulsive force F 35 and suction force F 15 All of these are to increase the contact closing force.

[0017] The method of using the lightning protection relay contact structure includes the following steps: In the first step, when the current is normally flowing, the moving contact and the stationary contact are closed, and the moving contact rotating member is subjected to the same-direction electric force applied by the second moving contact fixed conductive member and the first moving contact fixed conductive member. The two electric forces increase the closing force of the contact, and the relay realizes normal current flow; In the second step, when the circuit is struck by lightning, a repulsive force is instantly induced between the moving contact and the static contact, overcoming the contact closing force and achieving the opening of the moving contact and the static contact; In the third step, the moving contact and the stationary contact are separated, an arc is generated between the contacts, the arc is moved towards the arc striking feature by the electric force, the arc is extinguished quickly, and the opening is completed; The fourth step is that after the lightning strike, the moving contact soft connection component causes the moving contact and the static contact to automatically close, and the relay continues to conduct normally.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts an electromotive force compensation contact structure, which greatly improves the contact's ability to withstand current in a short time, effectively improves the mechanical life of the relay, and has the advantages of small size, simple structure, and easy function realization.

[0019] The above description is only an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer and to achieve the extent that those skilled in the art can implement it according to the contents of the specification, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are exemplified below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.

[0021] In the attached picture: Figure 1 It is a schematic diagram of the overall structure of a lightning protection relay contact structure according to an embodiment of the present invention; Figure 2 A schematic structural diagram of a moving contact member of a lightning protection relay contact structure according to an embodiment of the present invention; Figure 3 A schematic structural diagram of a static contact component of a lightning protection relay contact structure according to an embodiment of the present invention; Figure 4The present invention is a schematic diagram of the working structure of a lightning protection relay contact according to an embodiment of the present invention, wherein (a) is a cross-sectional schematic diagram, and (b) is a three-dimensional schematic diagram.

[0022] The present invention is further explained below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the specific embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0024] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the present invention, but the description is based on the general principles of the specification and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the attached claims.

[0025] To facilitate understanding of the embodiments of the present invention, several specific embodiments will be further explained below with reference to the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present invention.

[0026] For a better understanding, Figures 1 to 4 As shown, a lightning protection relay contact structure includes: Fixed support 1; The moving contact member 2 is arranged on the fixed support 1, and the moving contact member 2 includes: The first moving contact fixed conductive member 2-1 is movably arranged in the fixed support 1. The conductive connecting member 2-2 is arranged at the end of the movable contact fixed conductive member, The second moving contact fixed conductive member 2-3 is connected to the conductive connection member 2-2, and the current direction in the second moving contact fixed conductive member 2-3 is opposite to the current direction in the first moving contact fixed conductive member 2-1. The moving contact soft connection member 2-4 is flexibly connected to one end of the second moving contact fixed conductive member 2-3 away from the conductive connection member 2-2. The moving contact rotating member 2-5 has one end connected to the moving contact soft connecting member 2-4, so that the moving contact rotating member 2-5 extends outward between the first moving contact fixed conductive member 2-1 and the second moving contact fixed conductive member 2-3 and the moving contact rotating member 2-5 is rotatable relative to the second moving contact fixed conductive member 2-3. A moving contact silver point component 2-6, which is arranged at the other end of the moving contact rotating component 2-5 away from the moving contact soft connection component 2-4; The stationary contact component 3 is arranged on the fixed support 1, and the stationary contact component 3 includes: The static conductive sheet 3-1 is arranged on the fixed support 1, The static silver point component 3-2 is arranged on the static conductive sheet 3-1 and opposite to the moving contact silver point component 2-6.

[0027] In a preferred embodiment of the lightning protection relay contact structure, the moving contact rotating member 2-5 has a first arc-starting portion arranged at the other end portion away from the moving contact soft connection member 2-4, and the static conductive sheet 3-1 has a second arc-starting portion relative to the first arc-starting portion.

[0028] In a preferred embodiment of the lightning protection relay contact structure, the first arc-starting portion and the second arc-starting portion are sheet-like structures that are inclined outwards toward each other.

[0029] In a preferred embodiment of the lightning protection relay contact structure, the moving contact rotating member 2-5 is rotatably connected to the second moving contact fixed conductive member 2-3 through multiple contacts.

[0030] In a preferred embodiment of the lightning protection relay contact structure, the movable contact rotating member 2-5 is rotatably connected to the second movable contact fixed conductive member 2-3.

[0031] In a preferred embodiment of the lightning protection relay contact structure, when the relay is opened, an electric force is generated to push the arc upward, and the direction of the electric force is independent of the current passing through the relay.

[0032] In a preferred embodiment of the lightning protection relay contact structure, the movable contact rotating member 2-5 is provided with a through groove penetrating the conductive connecting member 2-2.

[0033] In a preferred embodiment of the lightning protection relay contact structure, the direction of the current passing through the movable contact rotating member 2-5 is the same as the direction of the current passing through the first movable contact fixed conductive member 2-1.

[0034] In the preferred embodiment of the lightning protection relay contact structure, the electromotive force between the moving contact rotating member 2-5 and the second moving contact fixed conductive member 2-3 is a repulsive force F 35The electromotive force between the moving contact rotating member 2-5 and the first moving contact fixed conductive member 2-1 is the suction force F 15 , the repulsive force F 35 and suction force F 15 All of these are to increase the contact closing force.

[0035] The method for using the lightning protection relay contact structure comprises the following steps: The first step is that when the current is normally flowing, the moving contact and the stationary contact are closed, and the moving contact rotating member 2-5 is subjected to the same-direction electric force applied by the second moving contact fixed conductive member 2-3 and the first moving contact fixed conductive member 2-1. The two electric forces increase the closing force of the contact, and the relay realizes normal current flow; In the second step, when the circuit is struck by lightning, a repulsive force is instantly induced between the moving contact and the static contact, overcoming the contact closing force and achieving the opening of the moving contact and the static contact; In the third step, the moving contact and the stationary contact are separated, an arc is generated between the contacts, the arc is moved towards the arc striking feature by the electric force, the arc is extinguished quickly, and the opening is completed; The fourth step is that after the lightning strike, the moving contact soft connection component 2-4 causes the moving contact and the static contact to automatically close, and the relay continues to conduct normally.

[0036] In one embodiment, the contact structure is composed of a fixed support, a moving contact component and a stationary contact component. The moving and stationary contact components are fixed on the fixed support. Figure 1 shown.

[0037] The moving contact member is composed of 6 parts: Figure 2 As shown, the first part is the first moving contact fixed conductive component 2-1, the second part is the conductive connection component 2-2, the third part is the second moving contact fixed conductive component 2-3, the fourth part is the moving contact soft connection component 2-4, and the fifth part is the moving contact rotating component 2-5, which includes but is not limited to Figure 2The first arc-striking part of the arc-striking feature shown in the figure, the sixth part is the moving contact silver point component 2-6, the first moving contact fixed conductive component 2-1 and the second moving contact fixed conductive component 2-3 are connected together through the conductive connecting component 2-2, the first moving contact fixed conductive component 2-1 and the second moving contact fixed conductive component 2-3 include but are not limited to similar conductive connecting components 2-2 to connect the first moving contact fixed conductive component 2-1 and the second moving contact fixed conductive component 2-3 together, the first moving contact fixed conductive component 2-1, the conductive connecting component 2-2 and the second moving contact fixed conductive component 2-3 are directly processed into a whole so that the first moving contact fixed conductive component 2-1 ... The current directions of the components 2-3 are opposite; the moving contact silver point component 2-6 is fixed together with the moving contact rotating component 2-5; the second moving contact fixed conductive component 2-3 is connected with the moving contact rotating component 2-5 through the moving contact soft connection component 2-4, so that the moving contact rotating component 2-5 and the moving contact silver point component 2-6 can make rotational movement, and the connection method between the second moving contact fixed conductive component 2-3 and the moving contact rotating component 2-5 includes but is not limited to soft connection, multi-contact connection and rotating pair, etc., so that the moving contact rotating component 2-5 makes rotational movement; and the moving contact rotating component 2-5 is located between the first moving contact fixed conductive component 2-1 and the second moving contact fixed conductive component 2-3.

[0038] The static contact component 3 is composed of two parts. The first part is a static conductive sheet 3-1, and the static conductive sheet 3-1 includes but is not limited to Figure 3 The second arc-starting portion of the arc-starting feature shown; the second part is divided into a static silver point component 3-2 such as Figure 3 When the direction of the current at a certain moment is Figure 4 As shown in (b), when the current passes through the moving contact member 2 and the stationary contact member 3, the direction of the current passing through the conductive connecting member 2-2, the moving contact silver point member 2-6 and the stationary silver point member 3-2 is opposite. When the relay is opened, an electric force is generated to push the arc upward, and the direction of the force is independent of the current passing through the relay at a certain moment.

[0039] When the direction of the current at a certain moment is Figure 4 In (a), the moving contact rotating member 2-5 is located between the first moving contact fixed conductive member 2-1 and the second moving contact fixed conductive member 2-3, so that the current directions passing through the moving contact rotating member 2-5 and the second moving contact fixed conductive member 2-3 are opposite, and the current directions passing through the moving contact rotating member 2-5 and the first moving contact fixed conductive member 2-1 are the same. From the electromagnetic field, it can be known that the electric force between the moving contact rotating member 2-5 and the second moving contact fixed conductive member 2-3 is a repulsive force F 35 The electromotive force between the moving contact rotating member 2-5 and the first moving contact fixed conductive member 2-1 is the suction force F 15The two parts of the electric power are both used to increase the contact closing force. The electric power generated by the above structural features has nothing to do with the current flowing through the relay at a certain moment.

[0040] In one embodiment, Figure 4 A structural schematic diagram of the novel contact mechanism in operation is given, and the specific breaking process is as follows: (1) Under normal working conditions, the direction of the current at a certain moment is as follows: Figure 4 In (a), the moving contact rotating member 2-5 is located between the first moving contact fixed conductive member 2-1 and the second moving contact fixed conductive member 2-3, and the contacts are in a closed state.

[0041] (2) When a lightning strike occurs, the moving contact silver point component 2-6 is subjected to the opening electromotive force applied by the static silver point component 3-2, and the moving and static contacts are separated, generating an arc. The arc is acted upon by the upward electromotive force and moves to the arc striking feature, thus realizing the opening operation.

[0042] (3) After the impact disappears, the arc is extinguished, and the moving contact silver point component 2-6 rotates under the action of the soft connection. The moving contact silver point component 2-6 and the static silver point component 3-2 are closed, and the circuit is normally conductive.

[0043] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0044] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A lightning protection relay contact structure, characterized in that: These include, Fixed support; A moving contact member is arranged on the fixed support, and the moving contact member comprises: The first moving contact is a fixed conductive member, which is movably arranged in the fixed support. A conductive connecting member, which is arranged at the end of the movable contact fixed conductive member, a second moving contact fixed conductive member, which is connected to the conductive connection member, and the current direction in the second moving contact fixed conductive member is opposite to the current direction in the first moving contact fixed conductive member, a movable contact soft connection member, which is flexibly connected to an end of the second movable contact fixed conductive member away from the conductive connection member, a moving contact rotating member, one end of which is connected to the moving contact soft connecting member, so that the moving contact rotating member extends outward between the first moving contact fixed conductive member and the second moving contact fixed conductive member and the moving contact rotating member is rotatable relative to the second moving contact fixed conductive member, A moving contact silver point component, which is arranged at the other end of the moving contact rotating component away from the moving contact soft connection component; A stationary contact component is arranged on the fixed support, and the stationary contact component comprises: a static conductive sheet, which is arranged on the fixed support, A static silver point component is arranged on the static conductive sheet and opposite to the moving contact silver point component.

2. The lightning protection relay contact structure according to claim 1, characterized in that: Preferably, the moving contact rotating member has a first arc-starting portion provided at the other end portion away from the moving contact soft connecting member, and the static conductive sheet has a second arc-starting portion opposite to the first arc-starting portion.

3. The lightning protection relay contact structure according to claim 2, characterized in that: The first arc-starting portion and the second arc-starting portion are sheet-like structures that are inclined outwards toward each other.

4. The lightning protection relay contact structure according to claim 1, characterized in that: The moving contact rotating component is rotatably connected to the second moving contact fixed conductive component through multiple contact points.

5. The lightning protection relay contact structure according to claim 1, characterized in that: The moving contact rotating member rotation pair is rotatably connected to the second moving contact fixed conductive member.

6. The lightning protection relay contact structure according to claim 1, characterized in that: When the relay is opened, an electromotive force is generated to push the arc upward, and the direction of the electromotive force has nothing to do with the current passing through the relay.

7. The lightning protection relay contact structure according to claim 1, characterized in that: The moving contact rotating component is provided with a through slot penetrating the conductive connecting component.

8. The lightning protection relay contact structure according to claim 1, characterized in that: The direction of the current passing through the movable contact rotating component and the first movable contact fixed conductive component is the same.

9. The lightning protection relay contact structure according to claim 1, characterized in that: The electromotive force between the moving contact rotating member and the second moving contact fixed conductive member is a repulsive force F 35 The electromotive force between the moving contact rotating member and the first moving contact fixed conductive member is the suction force F 15 , the repulsive force F 35 and suction force F 15 All of these are to increase the contact closing force.

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