Strong magnetic quenching structure of 5G1U circuit breaker

Abstract

The invention discloses a strong magnetic quenching structure of a 5G1U circuit breaker, which structurally comprises a circuit breaker body and an opening and closing mechanism arranged in the circuit breaker body, the opening and closing mechanism is connected with a moving contact, two wiring holes are formed in the left side of the circuit breaker body, and a first conducting strip and a second conducting strip are respectively connected in the two wiring holes. The right end of the circuit breaker body is provided with a first electrode interface and a second electrode interface, the first electrode interface is in flexible connection with the moving contact and controls connection and disconnection between the first electrode interface and the first conducting strip through the moving contact, and the second electrode interface is electrically connected with the second conducting strip. An arc extinguishing mechanism is arranged in the circuit breaker body and located at the matching position of the static contact and the moving contact. The arc extinguishing mechanism is arranged at the matching position of the static contact and the moving contact in the circuit breaker body, and the arc extinguishing mechanism is used for extinguishing electric arcs generated in the on-off process of the moving contact and the static contact, so that the electric arcs are prevented from being diffused in the circuit breaker, and the use safety of the circuit breaker is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and more specifically, to a strong magnetic arc blowing-out structure of a 5G1U circuit breaker. Background Art

[0002] Circuit breakers can effectively improve the safety of electrical equipment. They are classified by installation method, including plug-in type, fixed type and drawer type. With the miniaturization of electrical equipment, the overall structure and operation method of the matching circuit breakers also need to be gradually upgraded. Among them, plug-in circuit breakers are widely used in communication equipment due to their compact structure, space saving and easy installation.

[0003] The switch contacts of a circuit breaker are often accompanied by the generation of an arc during the process of being turned on. However, the arc extinguishing performance of existing circuit breakers is poor, and the arc is easily spread inside the circuit breaker, affecting the safety of the circuit breaker. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a strong magnetic arc extinguishing structure for a 5G1U circuit breaker to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a strong magnetic arc extinguishing structure of a 5G1U circuit breaker, comprising a circuit breaker body and an opening and closing mechanism arranged inside the circuit breaker body, the opening and closing mechanism is connected to a moving contact, two wiring holes are provided on the left side of the circuit breaker body, a first conductive sheet and a second conductive sheet are respectively connected to the two wiring holes, the first conductive sheet is connected to a static contact, a first electrode interface and a second electrode interface are provided at the right end of the circuit breaker body, the first electrode interface is softly connected to the moving contact and controls the connection and disconnection of the first conductive sheet through the moving contact, the second electrode interface is electrically connected to the second conductive sheet, and an arc extinguishing mechanism is provided at the matching position of the static contact and the moving contact in the circuit breaker body.

[0006] The present invention is further configured as follows: the arc extinguishing mechanism includes an arc extinguishing chamber, and a first arc striking piece and a second arc striking piece are respectively arranged on the upper and lower sides of the arc extinguishing chamber, the first arc striking piece is connected to the first electrode interface through a connecting piece, and the static contact is installed on the second arc striking piece.

[0007] The present invention is further configured as follows: a plurality of arc extinguishing grids are arranged equidistantly and at intervals in the arc extinguishing chamber for isolating and extinguishing the electric arc.

[0008] The present invention is further configured as follows: an electromagnetic coil is connected between the first conductive sheet and the stationary contact, and a moving iron core that can be driven by the electromagnetic coil is arranged in the electromagnetic coil.

[0009] The present invention is further configured as follows: the second arc-starting piece is formed to have a matching interval for accommodating the static contact.

[0010] The present invention is further configured as follows: the first arc-starting piece and the second arc-starting piece are both integrally formed structures.

[0011] The present invention is further configured as follows: the arc extinguishing mechanism also includes a magnetizing sheet, and the magnetizing sheet is separated from the static contact and the moving contact by a middle cover.

[0012] In summary, the present invention has the following beneficial effects: an arc extinguishing mechanism is provided in the circuit breaker body of the present invention at the joint position between the static contact and the moving contact, and the arc extinguishing mechanism is used to extinguish the arc generated during the switching process of the moving contact and the static contact, thereby preventing the arc from spreading inside the circuit breaker and ensuring the safety of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the internal structure of the circuit breaker body of the present invention;

[0016] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure after the middle cover is hidden.

[0017] Figure numerals: 1. Circuit breaker body; 10. Moving contact; 2. Wiring hole; 20. First conductive plate; 21. Second conductive plate; 22. Static contact; 23. First electrode interface; 24. Second electrode interface; 3. Arc extinguishing chamber; 30. First arc-striking plate; 31. Second arc-striking plate; 32. Connecting plate; 33. Arc extinguishing grid; 34. Matching interval; 35. Magnetizing plate; 4. Electromagnetic coil; 40. Moving iron core; 41. Middle cover. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-3As shown, a strong magnetic arc extinguishing structure of a 5G1U circuit breaker according to an embodiment of the present invention includes a circuit breaker body 1 and an opening and closing mechanism arranged inside the circuit breaker body 1, the opening and closing mechanism is connected to a moving contact 10, two wiring holes 2 are provided on the left side of the circuit breaker body 1, a first conductive sheet 20 and a second conductive sheet 21 are respectively connected in the two wiring holes 2, the first conductive sheet 20 is connected to a static contact 22, a first electrode interface 23 and a second electrode interface 24 are provided at the right end of the circuit breaker body 1, the first electrode interface 23 is softly connected to the moving contact 10 and controls the connection and disconnection of the first conductive sheet 20 through the moving contact 10, the second electrode interface 24 is electrically connected to the second conductive sheet 21, and an arc extinguishing mechanism is provided at the matching position of the static contact 22 and the moving contact 10 in the circuit breaker body 1.

[0020] When in use, a handle is provided at the left end of the circuit breaker, and the handle is connected to the opening and closing mechanism inside the circuit breaker body 1 to drive the moving contact 10 and the static contact 22 to open and close to control the on and off of the first electrode interface 23 and the first conductive sheet 20, and the second electrode interface 24 is electrically connected to the second conductive sheet 21. Two wiring holes 2 for connecting wires are provided on the left side of the circuit breaker body 1, and the wires are electrically connected to the first conductive sheet 20 and the second conductive sheet 21 respectively through the two wiring holes 2; the first electrode interface 23 is softly connected to the moving contact 10 through a conventional wire;

[0021] An arc extinguishing mechanism is provided in the circuit breaker body 1 at the joint between the static contact 22 and the moving contact 10. The arc extinguishing mechanism is used to extinguish the arc generated during the connection and disconnection process between the moving contact 10 and the static contact 22, thereby preventing the arc from spreading inside the circuit breaker and ensuring the safety of the circuit breaker.

[0022] The arc extinguishing mechanism includes an arc extinguishing chamber 3, and a first arc-striking plate 30 and a second arc-striking plate 31 are respectively arranged on the upper and lower sides of the arc extinguishing chamber 3. The first arc-striking plate 30 is connected to the first electrode interface 23 through a connecting plate 32, and the static contact 22 is installed on the second arc-striking plate 31; a plurality of arc-striking grids 33 are equidistantly and spaced apart in the arc extinguishing chamber 3 for isolating and extinguishing the arc.

[0023] When in use, the arc generated during the switching process between the moving contact 10 and the stationary contact 22 is introduced into the arc extinguishing chamber 3 through the two arc-striking pieces, and then each arc-extinguishing grid 33 blocks and extinguishes the arc to achieve arc extinguishing.

[0024] An electromagnetic coil 4 is connected between the first conductive sheet 20 and the stationary contact 22 , and a moving iron core 40 that can be driven by the electromagnetic coil 4 is disposed inside the electromagnetic coil 4 .

[0025] When in use, when a short circuit occurs, one end of the moving iron core 40 triggers the opening and closing mechanism, so that the opening and closing mechanism drives the moving contact 10 to open.

[0026] The second arc-starting piece 31 is formed to have a matching area 34 for accommodating the stationary contact 22 .

[0027] When in use, the static contact 22 is formed with an assembly end that is adapted to the mating interval 34. During assembly, the assembly end of the static contact 22 is extended into the mating interval 34 to complete the assembly and fixation. The limiting cooperation between the assembly end and the mating interval 34 effectively improves the stability of the assembly of the second arc-starting piece 31 and the static contact 22, while avoiding displacement of the static contact 22 during use, thereby ensuring the mating stability of the static contact 22 and the moving contact 10.

[0028] The first arc-striking piece 30 and the second arc-striking piece 31 are both integrally formed structures.

[0029] When in use, the first arc-striking piece 30 and the second arc-striking piece 31 adopt an integrally formed structure, which effectively improves their overall strength.

[0030] The arc extinguishing mechanism further includes a magnetizing sheet 35 , and the magnetizing sheet 35 is separated from the stationary contact 22 and the moving contact 10 by a middle cover 41 .

[0031] When in use, the circuit breaker body 1 includes two outer shells assembled with each other and a middle cover 41 located in the outer shell. The middle cover 41 limits the magnetizing sheet 35 when installed, and at the same time provides insulation protection for the magnetizing sheet 35. An arc is generated when the moving contact 10 and the static contact 22 are connected and disconnected. The arc is blown toward the arc extinguishing chamber 3 under the action of the magnetic field formed by the magnetizing sheet 35, thereby effectively improving the arc extinguishing effect.

[0032] It should also be pointed out that the terms used in the present invention, such as “front”, “rear”, “vertical”, “horizontal”, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0033] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A strong magnetic arc blowing structure for a 5G1U circuit breaker, comprising a circuit breaker body (1) and a switch-on / off mechanism arranged inside the circuit breaker body (1), wherein the switch-on / off mechanism is connected to a moving contact (10), and is characterized in that: The circuit breaker body (1) has two wiring holes (2) on the left side, and the two wiring holes (2) are respectively connected to a first conductive sheet (20) and a second conductive sheet (21), and the first conductive sheet (20) is connected to a stationary contact (22). The circuit breaker body (1) has a first electrode interface (23) and a second electrode interface (24) on the right end, and the first electrode interface (23) is softly connected to the moving contact (10) and controls the connection and disconnection between the first electrode interface (23) and the first conductive sheet (20) through the moving contact (10). The second electrode interface (24) is electrically connected to the second conductive sheet (21), and an arc extinguishing mechanism is provided at the matching position of the stationary contact (22) and the moving contact (10) in the circuit breaker body (1).

2. The strong magnetic arc blowing out structure of the 5G1U circuit breaker according to claim 1 is characterized in that: The arc extinguishing mechanism comprises an arc extinguishing chamber (3), wherein a first arc striking piece (30) and a second arc striking piece (31) are respectively arranged on the upper and lower sides of the arc extinguishing chamber (3), wherein the first arc striking piece (30) is connected to the first electrode interface (23) via a connecting piece (32), and the static contact (22) is mounted on the second arc striking piece (31).

3. The strong magnetic arc blowing out structure of the 5G1U circuit breaker according to claim 2 is characterized in that: A plurality of arc extinguishing grids (33) are arranged in equal and spaced relation in the arc extinguishing chamber (3) and are used for isolating and extinguishing the electric arc.

4. The strong magnetic arc blowing out structure of the 5G1U circuit breaker according to claim 2 is characterized in that: An electromagnetic coil (4) is connected between the first conductive sheet (20) and the stationary contact (22), and a moving iron core (40) that can be driven by the electromagnetic coil (4) is arranged inside the electromagnetic coil (4).

5. The strong magnetic arc extinguishing structure of the 5G1U circuit breaker according to claim 4 is characterized in that: The second arc-starting piece (31) is formed with a matching area (34) for accommodating the static contact (22).

6. The strong magnetic arc extinguishing structure of the 5G1U circuit breaker according to claim 1 is characterized in that: The first arc-striking piece (30) and the second arc-striking piece (31) are both integrally formed structures.

7. The strong magnetic arc blowing out structure of the 5G1U circuit breaker according to claim 6 is characterized in that: The arc extinguishing mechanism further comprises a magnetizing sheet (35), and the magnetizing sheet (35) is separated from the stationary contact (22) and the moving contact (10) by a middle cover (41).

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