Efficient arc extinguishing direct current contactor

Abstract

The utility model discloses a high-efficiency arc extinguishing direct current contactor, which comprises a shell, and a contact mechanism, an electromagnetic driving mechanism and an arc extinguishing system which are arranged in the shell, the contact mechanism comprises a static contact and a moving contact, and the moving contact is driven by the electromagnetic driving mechanism to be in contact with and away from the static contact; the arc extinguishing system comprises an arc extinguishing chamber, a gas production partition plate and an arc striking piece; the two gas production partition plates are distributed on the two sides of the arc extinguish chamber respectively and provided with gas production parts extending to the two sides of the contact mechanism. The arc striking piece comprises an upper arc striking plate and a lower arc striking plate, the upper arc striking plate and the lower arc striking plate are arranged between the two gas production parts and are vertically opposite to each other, an arc striking channel is defined by the upper arc striking plate, the lower arc striking plate and the two gas production parts, and the arc striking channel is provided with an arc inlet opposite to the contact mechanism; an exhaust port is formed in the position, corresponding to the arc extinguish chamber, of the shell; by optimizing the structure of the direct current contactor, the arc extinguishing capability can be greatly improved, the efficient arc extinguishing effect is realized, and the overall use performance of the direct current contactor is effectively enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of DC contactors, and in particular relates to a high-efficiency arc-extinguishing DC contactor. Background Art

[0002] A DC contactor is an electrical switching device specifically used to control a DC circuit. Its main function is to drive the contact or separation between the moving contact and the static contact through the magnetic field generated by the coil, thereby realizing reliable switching and protection of the DC load. This process not only requires a stable mechanical structure, but also places high requirements on the arc extinguishing performance to ensure that the arc can be quickly and effectively extinguished when the circuit is disconnected. Existing DC contactors often use a simple arc extinguishing device, usually only with an arc extinguishing chamber inside. When the moving contact is separated from the static contact, an arc is generated. After these arcs are generated at the contact mechanism, they immediately enter the arc extinguishing chamber for extinguishing. However, this single form of arc extinguishing structure has many limitations, such as the lack of guidance and control for the arc. The arc itself has a very high temperature and energy, which requires not only appropriate time but also suitable environmental conditions during the extinguishing process; a simple arc extinguishing chamber often cannot provide sufficient airflow or gas guidance, making the arc extinguishing process in the arc extinguishing chamber slow and incomplete, which easily leads to the continued existence of the arc, thereby affecting the performance of the DC contactor. Utility Model Content

[0003] In this regard, an object of the present utility model is to provide a DC contactor which can effectively improve arc extinguishing performance.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model provides a high-efficiency arc-extinguishing DC contactor, comprising a shell, and a contact mechanism, an electromagnetic drive mechanism and an arc-extinguishing system arranged in the shell, the contact mechanism comprising a static contact and a moving contact, the moving contact being driven by the electromagnetic drive mechanism to contact and move away from the static contact; the arc-extinguishing system comprising an arc-extinguishing chamber, a gas-producing baffle and an arc-striking member; two gas-producing baffles are respectively distributed on both sides of the arc-extinguishing chamber and have gas-producing parts extending to both sides of the contact mechanism; the arc-striking member comprises an upper arc-striking plate and a lower arc-striking plate, the upper arc-striking plate and the lower arc-striking plate are arranged between the two gas-producing parts and are opposite to each other up and down, the upper arc-striking plate, the lower arc-striking plate and the two gas-producing parts enclose an arc-striking channel, and the arc-striking channel has an arc inlet port opposite to the contact mechanism; an exhaust port is provided on the shell at a position corresponding to the arc-extinguishing chamber.

[0006] Preferably, a plurality of magnets are distributed on the surface of the gas production baffle.

[0007] Preferably, a mounting groove is provided on the side of the gas-producing baffle facing away from the arc-extinguishing chamber, and the magnet is embedded in the mounting groove.

[0008] Preferably, the arc extinguishing chamber includes a plurality of arc extinguishing units spliced ​​in the up and down directions, each arc extinguishing unit includes an arc extinguishing unit seat and an arc extinguishing grid mounted on the arc extinguishing unit seat, an air inlet connected to the arc striking channel is formed on the side of the arc extinguishing unit seat facing the contact mechanism, and an air outlet is provided on the side of the arc extinguishing unit seat away from the contact mechanism.

[0009] Preferably, a transversely arranged mounting plate is provided in the arc extinguishing unit seat, a separation groove is provided on the mounting plate, two ends of the arc extinguishing grid are connected to the mounting plate, and a bending portion passing through the separation groove is provided in the middle of the arc extinguishing grid.

[0010] Preferably, an upper positioning portion is provided on the upper portion of each arc extinguishing unit seat, and a lower positioning portion is provided on the lower portion of each arc extinguishing unit seat, and two upper and lower adjacent arc extinguishing unit seats are plug-fitted in the upper and lower directions through the upper positioning portion and the lower positioning portion.

[0011] Preferably, one of the upper positioning portion and the lower positioning portion is a socket, and the other is a plug post.

[0012] Preferably, a positioning groove arranged in the up-down direction is provided on the side of the gas generating baffle facing the arc extinguishing chamber, and the side portion of the arc extinguishing chamber is embedded in the positioning groove.

[0013] Preferably, the shell includes a shell base and a side cover that are connected to each other, and two gas-producing baffles are respectively fixed to the inner side of the shell base and the inner side of the side cover.

[0014] Preferably, support and limiting parts for supporting and limiting the upper arc-striking plate and the lower arc-striking plate are respectively formed on the upper and lower sides of the gas producing part.

[0015] The positive effects of the utility model are as follows: the structure of the high-efficiency DC contactor in the utility model is optimized, especially the optimization of the arc extinguishing system. When in use, the arc generated at the contact mechanism enters the arc striking channel from the arc inlet and is introduced into the arc extinguishing chamber for rapid arc extinguishing. Moreover, the gas producing part can release gas under the influence of the high heat of the arc to produce a gas blowing effect, thereby accelerating the arc to enter the arc extinguishing chamber. The arc striking part can guide the arc, thereby effectively improving the arc extinguishing ability and improving the performance of the DC contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. Similar elements or parts in the drawings are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a three-dimensional schematic diagram of a high-efficiency arc-extinguishing DC contactor in the utility model;

[0018] Figure 2 It is a three-dimensional schematic diagram of the high-efficiency arc-extinguishing DC contactor in the utility model after removing the side cover;

[0019] Figure 3 It is a three-dimensional schematic diagram of the high-efficiency arc-extinguishing DC contactor in the utility model with the shell removed;

[0020] Figure 4 It is a structural schematic diagram of the arc extinguishing system in the utility model;

[0021] Figure 5 for Figure 4 An exploded view of the arc extinguishing system shown;

[0022] Figure 6 It is a structural schematic diagram of the arc extinguishing unit in the utility model;

[0023] Figure 7 for Figure 6 A schematic structural diagram of the arc extinguishing unit from another perspective;

[0024] Figure 8 It is a three-dimensional schematic diagram of the arc extinguishing chamber in the utility model.

[0025] The reference numerals shown in the figure are: 1. shell; 11. shell seat; 12. side cover; 13. exhaust port; 2. contact mechanism; 21. static contact; 22. moving contact; 3. electromagnetic drive mechanism; 4. arc extinguishing chamber; 41. arc extinguishing unit; 411. arc extinguishing unit seat; 412. arc extinguishing grid; 413. air inlet; 414. air outlet; 415. mounting plate; 416. partition groove; 417. bending part; 418. upper positioning part; 419. lower positioning part; 5. gas producing baffle; 50. gas producing part; 51. mounting groove; 52. positioning groove; 53. support and limiting part; 6. arc striking member; 61. upper arc striking plate; 62. lower arc striking plate; 7. arc inlet; 8. magnet. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples and cannot be used to limit the protection scope of the utility model.

[0027] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0028] The structure of the efficient arc extinguishing DC contactor of the utility model embodiment is as follows Figures 1 to 8As shown, it includes a shell 1, and a contact mechanism 2, an electromagnetic drive mechanism 3 and an arc extinguishing system arranged in the shell 1. The contact mechanism 2 includes a static contact 21 and a moving contact 22. The moving contact 22 is driven by the electromagnetic drive mechanism 3 to contact and move away from the static contact 21. When the moving contact 22 contacts the static contact 21, the circuit is turned on. When the moving contact 22 is separated from the static contact 21, the circuit is cut off. The arc extinguishing system is used to extinguish the arc generated when the moving contact 22 is separated from the static contact 21.

[0029] Further, if Figures 2 to 5 As shown, the arc extinguishing system includes an arc extinguishing chamber 4, a gas producing baffle 5 and an arc striking member 6; two gas producing baffles 5 are respectively distributed on both sides of the arc extinguishing chamber 4 and have a gas producing portion 50 extending to both sides of the contact mechanism 2; the arc striking member 6 includes an upper arc striking plate 61 and a lower arc striking plate 62, the upper arc striking plate 61 and the lower arc striking plate 62 are arranged between the two gas producing portions 50 and are opposite to each other up and down, the upper arc striking plate 61, the lower arc striking plate 62 and the two gas producing portions 50 enclose an arc striking channel, and the arc striking channel has an arc inlet 7 opposite to the contact mechanism 2; An exhaust port 13 is provided on the shell 1 at a position corresponding to the arc extinguishing chamber 4, and the gas in the arc extinguishing chamber 4 is finally discharged from the shell through the exhaust port 13; by adopting the above-mentioned arc extinguishing system, the arc generated at the contact mechanism 2 enters the arc striking channel from the arc inlet port 7 and is introduced into the arc extinguishing chamber 4, and the gas producing part 50 can release gas under the influence of the high heat of the arc to produce a gas blowing effect, thereby accelerating the arc to enter the arc extinguishing chamber 4 for rapid arc extinguishing, and the arc striking member 6 can guide the arc, thereby effectively improving the arc extinguishing ability and improving the performance of the DC contactor.

[0030] like Figure 5 As shown, a plurality of magnets 8 are distributed on the plate surface of the gas-generating baffle 5, and the magnets 8 produce a magnetic blowing effect on the arc so that the arc is accelerated to move into the arc-extinguishing chamber 4, thereby improving the arc-extinguishing performance of the arc-extinguishing system. In order to facilitate the installation of the magnets 8, a mounting groove 51 is provided on the side of the gas-generating baffle 5 facing away from the arc-extinguishing chamber 4, and the magnets 8 are embedded in the mounting groove 51 to ensure the stable installation of the magnets 8.

[0031] like Figures 6 to 8As shown, in order to improve the flexibility of the production of the arc extinguishing chamber 4, the arc extinguishing chamber 4 includes a plurality of arc extinguishing units 41 spliced ​​in the up and down directions, so that the arc extinguishing units 41 can be flexibly spliced, and adjusted and combined according to actual needs to meet the arc extinguishing requirements in different application scenarios; each arc extinguishing unit 41 includes an arc extinguishing unit seat 411 and an arc extinguishing grid 412 installed on the arc extinguishing unit seat 411, and the arc extinguishing grid 412 has the function of cutting off and dividing the arc entering the arc extinguishing chamber 4, thereby effectively promoting the extinction of the arc; the arc extinguishing unit seat 411 is formed with an air inlet 413 connected to the arc striking channel on the side facing the contact mechanism 2, and the arc extinguishing unit seat 411 is provided with an air outlet 414 on the side away from the contact mechanism 2, the arc can enter the arc extinguishing chamber 4 through the air inlet 413, and the gas after arc extinguishing treatment can be smoothly discharged from the air outlet 414, thereby ensuring the smoothness of the gas flow.

[0032] Combination Figure 6 and Figure 7 As shown, in order to adapt to the installation of the arc extinguishing grid 412 in the arc extinguishing unit seat 411, the arc extinguishing unit seat 411 has a transversely arranged mounting plate 415, and a separation groove 416 is opened on the mounting plate 415. Both ends of the arc extinguishing grid 412 are connected to the mounting plate 415, and the middle part of the arc extinguishing grid 412 has a bending portion 417, and the bending portion 417 can pass through the separation groove 416; the arc extinguishing grid 412 can be set to a ㇍-shaped structure, and the arc extinguishing grid 412 is fixedly connected to the mounting plate 415 by screws, so that the arc extinguishing grid 412 is effectively fixed and is not prone to loosening or falling off, thereby improving the stability of the overall arc extinguishing chamber 4.

[0033] Continue to view Figure 6 and Figure 7 In order to enable the arc extinguishing units 41 constituting the arc extinguishing chamber 4 to be quickly and reliably assembled, an upper positioning portion 418 is provided on the upper portion of each arc extinguishing unit seat 411, and a lower positioning portion 419 is provided on the lower portion of each arc extinguishing unit seat 411. The upper positioning portion 418 and the lower positioning portion 419 form a plug-in fit in the upper and lower directions between two adjacent arc extinguishing unit seats 411; illustratively, the upper positioning portion 418 is a plug-in column, and the lower positioning portion 419 is a socket, and the positioning connection between adjacent arc extinguishing units 41 is achieved by plugging the plug-in column and the socket; in actual operation, the upper positioning portion 418 can also be set as a socket, and the lower positioning portion 419 can be set as a plug-in column.

[0034] In order to ensure the precise positioning of the arc extinguishing chamber 4, the gas generating baffle 5 is provided with a positioning groove 52 arranged along the up and down direction on the side facing the arc extinguishing chamber 4; the design of the positioning groove 52 allows the side of the arc extinguishing chamber 4 to be embedded in the positioning groove 52, thereby achieving effective fixation and stability.

[0035] In order to facilitate the installation of various components in the shell 1, the shell 1 is a split assembly structure, specifically including a shell base 11 and a side cover 12 that are connected to each other, and two gas-producing baffles 5 are respectively fixed (such as by screws) to the inner side of the shell base 11 and the inner side of the side cover 12; thereby ensuring the reliability of the fixation of the gas-producing baffles 5.

[0036] In order to enhance the compactness of the structure and limit the arc-striking part 6, support and limiting parts 53 are respectively formed on the upper and lower sides of the gas producing part 50. Through the mutual cooperation between the support and limiting parts and the upper arc-striking plate 61 and the lower arc-striking plate 62, the support and limiting parts 53 provide stable support for the upper arc-striking plate 61 and the lower arc-striking plate 62, so that their positions remain stable.

[0037] For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the invention still fall within the scope of protection of the utility model.

Claims

1. A high-efficiency arc-extinguishing DC contactor, comprising a housing (1), and a contact mechanism (2), an electromagnetic drive mechanism (3) and an arc-extinguishing system arranged in the housing (1), wherein the contact mechanism (2) comprises a stationary contact (21) and a moving contact (22), and the moving contact (22) is driven by the electromagnetic drive mechanism (3) to contact with and move away from the stationary contact (21); characterized in that: The arc extinguishing system comprises an arc extinguishing chamber (4), a gas producing baffle (5) and an arc striking member (6); the two gas producing baffles (5) are respectively distributed on both sides of the arc extinguishing chamber (4) and have gas producing portions (50) extending to both sides of the contact mechanism (2); the arc striking member (6) comprises an upper arc striking plate (61) and a lower arc striking plate (62), the upper arc striking plate (61) and the lower arc striking plate (62) are arranged between the two gas producing portions (50) and are opposite to each other in upper and lower directions, and the upper arc striking plate (61) and the lower arc striking plate (62) are arranged between the two gas producing portions (50) and are opposite to each other in upper and lower directions. The arc plate (62) and the two gas generating parts (50) enclose an arc striking channel, the arc striking channel having an arc inlet (7) opposite to the contact mechanism (2); an exhaust port (13) is provided on the housing (1) at a position corresponding to the arc extinguishing chamber (4); the arc extinguishing chamber (4) comprises a plurality of arc extinguishing units (41) spliced ​​in an up-and-down direction, each arc extinguishing unit (41) comprising an arc extinguishing unit seat (411) and an arc extinguishing grid (412) mounted on the arc extinguishing unit seat (411).

2. The high-efficiency arc-extinguishing DC contactor according to claim 1 is characterized in that: A plurality of magnets (8) are distributed on the surface of the gas production baffle (5).

3. The high-efficiency arc-extinguishing DC contactor according to claim 2 is characterized in that: A mounting groove (51) is provided on the side of the gas generating baffle (5) facing away from the arc extinguishing chamber (4), and the magnet (8) is embedded in the mounting groove (51).

4. The high-efficiency arc-extinguishing DC contactor according to claim 1 is characterized in that: An air inlet (413) connected to the arc striking channel is formed on the side of the arc extinguishing unit seat (411) facing the contact mechanism (2), and an air outlet (414) is provided on the side of the arc extinguishing unit seat (411) away from the contact mechanism (2).

5. The high-efficiency arc-extinguishing DC contactor according to claim 4 is characterized in that: The arc extinguishing unit seat (411) has a transversely arranged mounting plate (415), the mounting plate (415) is provided with a separation groove (416), both ends of the arc extinguishing grid (412) are connected to the mounting plate (415), and the middle of the arc extinguishing grid (412) has a bent portion (417) passing through the separation groove (416).

6. The high-efficiency arc-extinguishing DC contactor according to claim 4 is characterized in that: An upper positioning portion (418) is provided on the upper portion of each arc extinguishing unit seat (411), and a lower positioning portion (419) is provided on the lower portion of each arc extinguishing unit seat (411). Two arc extinguishing unit seats (411) adjacent to each other form a plug-in fit in the upper and lower directions through the upper positioning portion (418) and the lower positioning portion (419).

7. The high-efficiency arc-extinguishing DC contactor according to claim 6, characterized in that: One of the upper positioning portion (418) and the lower positioning portion (419) is a plug hole, and the other is a plug post.

8. The high-efficiency arc-extinguishing DC contactor according to claim 1, characterized in that: A positioning groove (52) arranged in the up-down direction is provided on one side of the gas generating baffle (5) facing the arc extinguishing chamber (4), and the side of the arc extinguishing chamber (4) is embedded in the positioning groove (52).

9. The high-efficiency arc-extinguishing DC contactor according to claim 1, characterized in that: The shell (1) comprises a shell base (11) and a side cover (12) which are connected to each other, and two gas-generating baffles (5) are respectively fixed to the inner side of the shell base (11) and the inner side of the side cover (12).

10. The high-efficiency arc-extinguishing DC contactor according to claim 1, characterized in that: Support and limit portions (53) for supporting and limiting the upper arc-starting plate (61) and the lower arc-starting plate (62) are respectively formed on the upper and lower sides of the gas-generating portion (50).

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