Arc contact instantaneous breaking structure

Abstract

The utility model discloses an arc contact instantaneous breaking structure, which belongs to the technical field of load switches and comprises an arc moving contact used for being matched with a main moving contact, an arc static contact used for being matched with the arc moving contact and a clamping assembly used for being matched with the arc static contact. A mounting seat is arranged beside the active contact, a rotating rod is rotationally arranged on the mounting seat, the arc moving contact is arranged on the rotating rod, the arc static contact is arranged below the rotating rod, the clamping assembly comprises a clamping spring arranged on the arc static contact, a torsional spring is arranged on the mounting seat, and the torsional spring is connected with the rotating rod. The arc moving contact has the effect of improving the transient interruption sensitivity of the arc moving contact.

Description

Technical Field

[0001] The utility model relates to the technical field of load switches, in particular to an arc contact instantaneous breaking structure. Background Art

[0002] A load switch is a switching device between a circuit breaker and an isolating switch. It is used to realize switching control of the load in the circuit. It has a simple arc extinguishing mechanism and can cut off the rated load current and a certain overload current. When extinguishing the arc, the arc on the active contact is induced to blow into the arc extinguishing chamber after the arc moving contact. Therefore, there are higher requirements for the instantaneous breaking ability of the arc moving contact; a clamping assembly is usually provided on the arc static contact to maintain the stability of the arc moving contact and the arc static contact when they are closed, but the clamping assembly reduces the sensitivity of the arc moving contact to instantaneous breaking, thereby affecting the safety of the entire load switch.

[0003] In view of the above-mentioned related technologies, it is urgent to design and develop an arc contact instantaneous breaking structure to improve the sensitivity of the arc contact instantaneous breaking, thereby improving the safety of the load switch. Utility Model Content

[0004] In order to improve the sensitivity of the arc contact instantaneous breaking, the present application provides an arc contact instantaneous breaking structure.

[0005] The present application provides an arc contact instantaneous breaking structure adopting the following technical solutions:

[0006] An arc contact instantaneous break structure includes an arc moving contact for cooperating with an active contact, an arc static contact for cooperating with the arc moving contact, and a clamping assembly for cooperating with the arc static contact. The active contact and the arc moving contact are connected by a connecting rod mechanism. A mounting seat is provided next to the active contact. A rotating rod is rotatably provided on the mounting seat. The arc moving contact is provided on the rotating rod. The arc static contact is provided obliquely below the rotating rod. The clamping assembly includes a clamping spring provided on the arc static contact. A torsion spring is provided on the mounting seat. The torsion spring is connected to the rotating rod.

[0007] By adopting the above technical solution, the active contact and the arc-moving contact are connected through a connecting rod mechanism, the mounting seat is provided next to the active contact, and a rotating rod is rotatably provided on the mounting seat, the arc-moving contact is provided on the rotating rod, the arc-static contact is provided obliquely below the rotating rod, the clamping spring is provided on the arc-static contact, and a torsion spring is provided on the mounting seat, and the torsion spring is connected to the rotating rod. In the process of the active contact driving the arc-moving contact to rotate through the connecting rod mechanism, the arc-moving contact is affected by the clamping force of the clamping spring and slowly approaches the direction close to the clamping spring port. At this time, the tension of the torsion spring cannot overcome the clamping force of the clamping spring. When the arc-moving contact moves to the clamping spring port, the clamping force of the clamping spring weakens, and the tension of the torsion spring overcomes the clamping force of the clamping spring. Under the action of the tension of the torsion spring, the arc-moving contact is instantly disconnected from the arc-static contact, thereby improving the sensitivity of the instantaneous disconnection of the arc-moving contact.

[0008] Preferably, the connecting rod mechanism includes a mounting plate arranged obliquely below the active contact, a main shaft rotatably arranged on the mounting plate, a transfer rod 1 fixedly arranged on the main shaft, a transfer rod 2 with one end hinged to the transfer rod 1, a connecting rod 1 fixedly arranged on the main shaft and a connecting rod 2 with one end hinged to the connecting rod 1, the other end of the transfer rod 2 is hinged to the active contact, and the other end of the connecting rod 2 is hinged to the rotating rod.

[0009] By adopting the above technical solution, the mounting plate is arranged obliquely below the active contact, the main shaft is rotatably arranged on the mounting plate, the transfer rod 1 is fixedly arranged on the main shaft, one end of the transfer rod 2 is hinged to the transfer rod 1, and the other end of the transfer rod 2 is hinged to the active contact, the connecting rod 1 is fixedly arranged on the main shaft, one end of the connecting rod 2 is hinged to the connecting rod 1, and the other end of the connecting rod 2 is hinged to the rotating rod. Through the connection relationship between the main shaft and the transfer rod 1, the transfer rod 2, the active contact, the connecting rod 1, the connecting rod 2, and the rotating rod, the active contact drives the linked contact to rotate, thereby facilitating the orderly progress of the arc extinguishing work.

[0010] Preferably, a waist-shaped hole is provided on the side surface of the second connecting rod, and the hinge shaft of the first connecting rod is slidably arranged in the waist-shaped hole.

[0011] By adopting the above technical solution, during the arc extinguishing process, in order to ensure that the arc can be smoothly transferred to the arc moving contact, the disconnection of the arc moving contact and the arc static contact needs to lag behind the disconnection time of the active contact and the circuit. A waist-shaped hole is opened on the side of the connecting rod 2, and the hinge shaft of the connecting rod 1 is slidably set in the waist-shaped hole. In the process of the main shaft driving the connecting rod 1 to deflect, the hinge shaft of the connecting rod 1 needs to slide in the waist-shaped hole for a period of time before it can abut against the connecting rod 2. During this sliding time, there is a certain angle difference between the deflection of the active contact and the deflection of the arc moving contact, which satisfies the time difference of disconnection and ensures that the arc can be smoothly transferred to the arc moving contact.

[0012] Preferably, an arc extinguishing mechanism is provided next to the mounting seat, and the arc extinguishing mechanism includes an arc extinguishing chamber provided next to the mounting seat, an arc extinguishing grid provided in the arc extinguishing chamber, and a magnetic blowing coil provided next to the arc extinguishing grid. A sliding slot is provided on the side of the arc extinguishing chamber close to the mounting seat, the arc static contact is provided in the arc extinguishing chamber, the magnetic blowing coil is provided next to the arc static contact, the rotating rod is rotatably provided in the arc extinguishing chamber, and the arc moving contact is rotatably provided in the arc extinguishing chamber.

[0013] By adopting the above technical solution, the arc extinguishing chamber is arranged next to the mounting seat, a sliding groove is opened on the side of the arc extinguishing chamber close to the mounting seat, the arc static contact is arranged in the arc extinguishing chamber, the magnetic blowing coil is arranged next to the arc static contact, the rotating rod is rotatably arranged in the arc extinguishing chamber, the arc moving contact is rotatably arranged in the arc extinguishing chamber, and the arc extinguishing grid is arranged in the arc extinguishing chamber. During the arc extinguishing process, the arc on the active contact is induced to the arc moving contact, and then the arc is blown onto the arc extinguishing grid through the magnetic blowing coil to facilitate arc extinguishing.

[0014] Preferably, a storage seat is provided next to the mounting seat, a mounting vertical plate is provided on the storage seat, and the active contact is rotatably provided on the mounting vertical plate through a hinge shaft.

[0015] By adopting the above technical solution, a storage seat is provided next to the mounting seat, a mounting vertical plate is provided on the storage seat, and the active contact is rotatably provided on the mounting vertical plate through the hinge shaft, thereby improving the stability of the active contact installation.

[0016] Preferably, a first connecting mechanism is provided between the mounting seat and the storage seat, the first connecting mechanism including a connecting plate 1 fixed to the side of the storage seat by screws and a connecting plate 2 fixed to the mounting seat by screws, an extension portion of the connecting plate 1 is fitted with the connecting plate 2, and the connecting plate 1 and the connecting plate 2 are connected by screws.

[0017] By adopting the above technical solution, connecting plate one is fixed to the side of the storage seat by screws, connecting plate two is fixed to the mounting seat by screws, the extension of connecting plate one is in contact with connecting plate two, and connecting plate one and connecting plate two are connected by screws, thereby improving the stability of the connection between the mounting seat and the storage seat.

[0018] Preferably, a placement seat is provided next to the storage seat, and a main static contact for cooperating with the active contact is provided on the placement seat, and the main static contact is located obliquely below the active contact. A second connecting mechanism is provided between the placement seat and the arc extinguishing chamber, and the second connecting mechanism includes a connecting strip fixed to the placement seat by screws, and the connecting strip is fixed to the side of the arc extinguishing chamber by screws.

[0019] By adopting the above technical solution, a placement seat is provided next to the placement seat, the main static contact is provided on the placement seat, the main static contact is located obliquely below the active contact, the connecting strip is fixed on the placement seat by screws, and the connecting strip is fixed on the side of the arc extinguishing chamber by screws, thereby improving the stability of the connection between the placement seat and the arc extinguishing chamber.

[0020] Preferably, a supporting mechanism is provided under the placement seat, and the supporting mechanism includes a supporting base plate, a supporting seat fixedly provided on the supporting base plate, a first insulator provided on the top surface of the support seat, a second insulator provided next to the first insulator, a third insulator provided next to the second insulator, and a fourth insulator provided next to the third insulator, the second insulator is provided on the top surface of the support seat, the third insulator is provided on the top surface of the support seat, the fourth insulator is provided on the top surface of the support seat, the placement seat is fixedly provided on the top of the first insulator, the mounting seat is fixedly provided on the top of the second insulator, the storage seat is fixedly provided on the top of the third insulator, and the arc extinguishing chamber is fixedly provided on the top of the fourth insulator.

[0021] By adopting the above technical solution, the support seat is fixedly set on the support base plate, the first insulator is set on the top surface of the support seat, the placement seat is fixedly set on the top of the first insulator, the second insulator is set on the top surface of the support seat, the second insulator is set next to the first insulator, the mounting seat is fixedly set on the top of the second insulator, the third insulator is set on the top surface of the support seat, the third insulator is set next to the second insulator, the placement seat is fixedly set on the top of the third insulator, the fourth insulator is set on the top surface of the support seat, the fourth insulator is set next to the third insulator, and the arc extinguishing chamber is fixedly set on the top of the fourth insulator, thereby improving the stability of the load switch operation.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] The cam is pressed against the stopcock, and the cam is pressed against the stopcock, which in turn presses the stopcock against the stopcock, and the cam is pressed against the stopcock, which in turn presses the stopcock against the stopcock, thereby releasing the stopcock from the stopcock.

[0024] 2. The mounting plate is arranged obliquely below the active contact, the main shaft is rotatably arranged on the mounting plate, the transfer rod 1 is fixedly arranged on the main shaft, one end of the transfer rod 2 is hinged on the transfer rod 1, and the other end of the transfer rod 2 is hinged on the active contact, the connecting rod 1 is fixedly arranged on the main shaft, one end of the connecting rod 2 is hinged on the connecting rod 1, and the other end of the connecting rod 2 is hinged on the rotating rod. Through the connection relationship between the main shaft and the transfer rod 1, the transfer rod 2, the active contact, the connecting rod 1, the connecting rod 2, and the rotating rod, it is convenient for the active contact to drive the arcing contact to rotate, thereby improving the linkage between the active contact and the arcing contact, thereby facilitating the orderly execution of the arc extinguishing work;

[0025] 3. During the arc extinguishing process, in order to ensure that the arc can be smoothly transferred to the arc-moving contact, the disconnection of the arc-moving contact and the arc-static contact needs to lag behind the disconnection time of the active contact and the circuit. A waist-shaped hole is opened on the side of the connecting rod 2, and the hinge shaft of the connecting rod 1 is slidably set in the waist-shaped hole. In the process of the main shaft driving the connecting rod 1 to deflect, the hinge shaft of the connecting rod 1 needs to slide in the waist-shaped hole for a period of time before it can abut against the connecting rod 2. During this sliding time, there is a certain angle difference between the deflection of the active contact and the deflection of the arc-moving contact, which meets the time difference of disconnection, ensures that the arc can be smoothly transferred to the arc-moving contact, and improves the overall arc extinguishing stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the arc contact instantaneous breaking structure in the embodiment of the present application.

[0027] Figure 2 It is a structural diagram of the second connecting mechanism in an embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the connection structure of the support mechanism in an embodiment of the present application.

[0029] Figure 4 It is a schematic diagram of the internal structure of the arc extinguishing chamber in the embodiment of the present application.

[0030] Figure 5 It is a schematic diagram of the connection structure of the connecting rod mechanism in an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 1. Active contact; 11. Mounting seat; 12. Rotating rod; 13. Torsion spring; 14. Mounting rod; 15. Storage seat; 151. Mounting plate; 16. Storage seat; 2. Main static contact; 3. Arc moving contact; 4. Arc static contact; 5. Clamping assembly; 51. Clamping spring; 6. Connecting rod mechanism; 61. Mounting plate; 62. Main shaft; 63. Transfer rod 1; 64. Transfer rod 2; 65. Connecting rod 1; 66. Connecting rod Connecting rod 2; 7. Arc extinguishing mechanism; 71. Arc extinguishing chamber; 72. Arc extinguishing grid; 73. Magnetic blow coil; 8. First connecting mechanism; 81. Connecting plate 1; 82. Connecting plate 2; 9. Second connecting mechanism; 91. Connecting strip; 10. Support mechanism; 101. Support base plate; 102. Support seat; 103. First insulator; 104. Second insulator; 105. Third insulator; 106. Fourth insulator. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The embodiment of the present application discloses an arc contact instantaneous breaking structure, referring to Figure 1 、 Figure 2 and Figure 3 As shown, the arc contact instantaneous breaking structure includes an active contact 1, a main static contact 2, an arc moving contact 3, an arc static contact 4, a clamping assembly 5, a connecting rod mechanism 6, an arc extinguishing mechanism 7, a first connecting mechanism 8, a second connecting mechanism 9 and a supporting mechanism 10.

[0035] Reference Figure 1 and Figure 3 As shown, the support mechanism 10 includes a support base plate 101, a support seat 102, a first insulator 103, a second insulator 104, a third insulator 105 and a fourth insulator 106. The support base plate 101 is horizontally arranged, and the length direction of the support base plate 101 is parallel to the ground. The support seat 102 is fixed to the top surface of the support base plate 101 by screws.

[0036] Reference Figure 1 and Figure 3As shown, the first insulator 103 is arranged on the top surface of the support base 102, the second insulator 104 is arranged next to the first insulator 103, the second insulator 104 is arranged on the top surface of the support base 102, the third insulator 105 is arranged on the top surface of the support base 102, the third insulator 105 is arranged next to the second insulator 104, the fourth insulator 106 is arranged on the top surface of the support base 102, and the fourth insulator 106 is arranged next to the third insulator 105.

[0037] Reference Figure 1 and Figure 3 As shown, the active contact 1 is arranged above the third insulator 105, and a mounting base 11 is provided next to the active contact 1. The mounting base 11 is fixedly provided on the top of the second insulator 104. A rotating rod 12 is rotatably provided on the mounting base 11, and a torsion spring 13 is provided on the mounting base 11. The torsion spring 13 is connected to the rotating rod 12. A mounting rod 14 is detachably provided on the rotating rod 12 by a screw, and the arcing contact 3 is provided on the mounting rod 14.

[0038] Reference Figure 1 and Figure 4 As shown, the arc extinguishing mechanism 7 includes an arc extinguishing chamber 71, an arc extinguishing grid 72 and a magnetic blowing coil 73. The arc extinguishing chamber 71 is fixedly arranged on the top of the fourth insulator 106. A sliding slot is provided on the side of the arc extinguishing chamber 71 close to the mounting seat 11. The arc extinguishing grid 72 is arranged in the arc extinguishing chamber 71. The magnetic blowing coil 73 is arranged next to the arc extinguishing grid 72. The arc static contact 4 is arranged in the arc extinguishing chamber 71. The magnetic blowing coil 73 is arranged next to the arc static contact 4. The rotating rod 12 is rotatably arranged in the arc extinguishing chamber 71. The mounting rod 14 is rotatably arranged in the arc extinguishing chamber 71. The arc moving contact 3 is rotatably arranged in the arc extinguishing chamber 71. During the arc extinguishing process, the arc on the active contact 1 is induced to the arc moving contact 3, and then the arc is blown onto the arc extinguishing grid 72 through the magnetic blowing coil 73 to facilitate arc extinguishing.

[0039] Reference Figure 1 and Figure 4 As shown, the clamping assembly 5 includes a clamping spring 51, which is provided on the arcing static contact 4. The cross section of the clamping spring 51 is U-shaped, and the cross section of the arcing static contact 4 is also U-shaped.

[0040] Reference Figure 1 As shown, a storage seat 15 is provided next to the mounting seat 11, and the storage seat 15 is fixedly provided on the top of the third insulator 105. A mounting vertical plate 151 is provided on the storage seat 15, and the active contact 1 is rotatably provided on the mounting vertical plate 151 through a hinge shaft, thereby improving the installation stability of the active contact 1.

[0041] Reference Figure 1As shown, the first connecting mechanism 8 includes a connecting plate 1 81 and a connecting plate 2 82. The connecting plate 1 81 is fixed to the side of the storage seat 15 by screws, and the connecting plate 2 82 is fixed to the mounting seat 11 by screws. The extension of the connecting plate 1 81 fits with the connecting plate 2 82. The connecting plate 1 81 and the connecting plate 2 82 are connected by screws to improve the stability of the connection between the storage seat 15 and the mounting seat 11.

[0042] Reference Figure 1 and Figure 2 As shown, a placement seat 16 is provided next to the placement seat 15, and the placement seat 16 is fixedly provided on the top of the first insulator 103. The main static contact 2 is provided on the placement seat 16, and the main static contact 2 is located obliquely below the active contact 1. The second connecting mechanism 9 includes a connecting strip 91, and the connecting strip 91 is fixedly provided on the placement seat 16 by screws. The connecting strip 91 is fixedly provided on the side of the arc extinguishing chamber 71 by screws, thereby improving the stability of the connection between the placement seat 16 and the arc extinguishing chamber 71.

[0043] Reference Figure 1 and Figure 5 As shown, the connecting rod mechanism 6 includes a mounting plate 61, a main shaft 62, a transfer rod 1 63, a transfer rod 2 64, a connecting rod 1 65 and a connecting rod 2 66. The mounting plate 61 is fixedly set on the supporting base plate 101. The length direction of the mounting plate 61 is the same as the length direction of the supporting base plate 101. The mounting plate 61 is set obliquely below the active contact 1.

[0044] Reference Figure 1 and Figure 5 As shown, the main shaft 62 is rotatably set on the mounting plate 61, the length direction of the main shaft 62 is parallel to the ground, and the length direction of the main shaft 62 is perpendicular to the length direction of the supporting base plate 101, the transfer rod 1 63 is fixedly set on the main shaft 62, one end of the transfer rod 2 64 is hinged to the transfer rod 1 63, and the other end of the transfer rod 2 64 is hinged to the active contact 1.

[0045] Reference Figure 1 and Figure 5 As shown, connecting rod 1 65 is fixedly set on the main shaft 62, one end of connecting rod 2 66 is hinged to connecting rod 1 65, and the other end of connecting rod 2 66 is hinged to the rotating rod 12. A waist-shaped hole is opened on the side of connecting rod 2 66, and the hinge shaft of connecting rod 1 65 is slidably set in the waist-shaped hole.

[0046] Reference Figure 1 and Figure 5As shown, through the connection relationship between the main shaft 62 and the transfer rod 1 63, the transfer rod 2 64, the active contact 1, the connecting rod 1 65, the connecting rod 2 66, and the rotating rod 12, it is convenient for the active contact 1 to drive the arcing contact 3 to rotate, thereby improving the linkage between the active contact 1 and the arcing contact 3, thereby facilitating the orderly execution of the arc extinguishing work.

[0047] Reference Figure 1 and Figure 5 As shown, in the process of the main shaft 62 driving the connecting rod 1 65 to deflect, the hinge shaft of the connecting rod 1 65 needs to slide for a while in the waist-shaped hole before it can abut against the connecting rod 2 66. During this sliding time, there is a certain angle difference between the deflection of the active contact 1 and the deflection of the arc-moving contact 3, which satisfies the time difference of disconnection, ensures that the arc can be smoothly transferred to the arc-moving contact 3, and improves the overall arc extinguishing stability of the device.

[0048] The implementation principle of an arc contact instantaneous breaking structure in the embodiment of the present application is as follows:

[0049] In the process of the active contact 1 driving the arcing contact 3 to rotate through the main shaft 62, the arcing contact 3 is affected by the clamping force of the clamping spring 51 and slowly approaches the direction close to the end of the clamping spring 51. At this time, the tension of the torsion spring 13 cannot overcome the clamping force of the clamping spring 51. When the arcing contact 3 moves to the end of the clamping spring 51, the clamping force of the clamping spring 51 is weakened, and the tension of the torsion spring 13 overcomes the clamping force of the clamping spring 51. Under the action of the tension of the torsion spring 13, the arcing contact 3 is instantly disconnected from the arc static contact 4, thereby improving the sensitivity of the arcing contact 3 to instantaneous disconnection. At this time, the active contact 1 is also connected to the circuit opener, which is convenient for timely directing the arc on the active contact 1 to the arcing contact 3, thereby ensuring the stable operation of the load switch.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An arc contact instantaneous breaking structure, comprising an arc moving contact (3) for cooperating with an active contact (1), an arc static contact (4) for cooperating with the arc moving contact (3), and a clamping assembly (5) for cooperating with the arc static contact (4), characterized in that: The active contact (1) and the arc moving contact (3) are connected via a connecting rod mechanism (6); a mounting seat (11) is provided next to the active contact (1); a rotating rod (12) is rotatably provided on the mounting seat (11); the arc moving contact (3) is provided on the rotating rod (12); the arc static contact (4) is provided obliquely below the rotating rod (12); the clamping assembly (5) includes a clamping spring (51) provided on the arc static contact (4); a torsion spring (13) is provided on the mounting seat (11); and the torsion spring (13) is connected to the rotating rod (12).

2. The arc contact instantaneous breaking structure according to claim 1, characterized in that: The connecting rod mechanism (6) includes a mounting plate (61) arranged obliquely below the active contact (1), a main shaft (62) rotatably arranged on the mounting plate (61), a transfer rod (63) fixedly arranged on the main shaft (62), a transfer rod (64) with one end hinged to the transfer rod (63), a connecting rod (65) fixedly arranged on the main shaft (62) and a connecting rod (66) with one end hinged to the connecting rod (65), the other end of the transfer rod (64) is hinged to the active contact (1), and the other end of the connecting rod (66) is hinged to the rotating rod (12).

3. The arc contact instantaneous breaking structure according to claim 2, characterized in that: A waist-shaped hole is provided on the side surface of the second connecting rod (66), and the hinge shaft of the first connecting rod (65) is slidably arranged in the waist-shaped hole.

4. The arc contact instantaneous breaking structure according to claim 1, characterized in that: An arc extinguishing mechanism (7) is provided next to the mounting seat (11), and the arc extinguishing mechanism (7) comprises an arc extinguishing chamber (71) provided next to the mounting seat (11), an arc extinguishing grid (72) provided in the arc extinguishing chamber (71), and a magnetic blowing coil (73) provided next to the arc extinguishing grid (72). A sliding slot is provided on a side of the arc extinguishing chamber (71) close to the mounting seat (11). The arc static contact (4) is provided in the arc extinguishing chamber (71), the magnetic blowing coil (73) is provided next to the arc static contact (4), the rotating rod (12) is rotatably provided in the arc extinguishing chamber (71), and the arc moving contact (3) is rotatably provided in the arc extinguishing chamber (71).

5. The arc contact instantaneous breaking structure according to claim 4, characterized in that: A storage seat (15) is provided next to the mounting seat (11), a mounting vertical plate (151) is provided on the storage seat (15), and the active contact (1) is rotatably provided on the mounting vertical plate (151) via a hinge shaft.

6. The arc contact instantaneous breaking structure according to claim 5, characterized in that: A first connecting mechanism (8) is provided between the mounting seat (11) and the storage seat (15), the first connecting mechanism (8) comprising a first connecting plate (81) fixed to the side of the storage seat (15) by screws and a second connecting plate (82) fixed to the mounting seat (11) by screws, an extension portion of the first connecting plate (81) being in contact with the second connecting plate (82), and the first connecting plate (81) and the second connecting plate (82) being connected by screws.

7. The arc contact instantaneous breaking structure according to claim 5, characterized in that: A placement seat (16) is provided next to the storage seat (15); a main static contact (2) for cooperating with the active contact (1) is provided on the placement seat (16); the main static contact (2) is located obliquely below the active contact (1); a second connecting mechanism (9) is provided between the placement seat (16) and the arc extinguishing chamber (71); the second connecting mechanism (9) includes a connecting strip (91) fixed to the placement seat (16) by screws; the connecting strip (91) is fixed to the side of the arc extinguishing chamber (71) by screws.

8. The arc contact instantaneous breaking structure according to claim 7, characterized in that: A support mechanism (10) is provided below the placement seat (16), and the support mechanism (10) comprises a support base plate (101), a support seat (102) fixedly provided on the support base plate (101), a first insulator (103) provided on the top surface of the support seat (102), a second insulator (104) provided next to the first insulator (103), a third insulator (105) provided next to the second insulator (104), and a fourth insulator (106) provided next to the third insulator (105). The second insulator (104 ) is arranged on the top surface of the support seat (102), the third insulator (105) is arranged on the top surface of the support seat (102), the fourth insulator (106) is arranged on the top surface of the support seat (102), the placement seat (16) is fixedly arranged on the top of the first insulator (103), the mounting seat (11) is fixedly arranged on the top of the second insulator (104), the storage seat (15) is fixedly arranged on the top of the third insulator (105), and the arc extinguishing chamber (71) is fixedly arranged on the top of the fourth insulator (106).

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