Arc extinguishing structure

Abstract

The utility model discloses an arc extinguishing structure, which belongs to the technical field of arc extinguishing switches and comprises an arc moving mechanism used for arc division, the arc moving mechanism comprises a rotating rod rotationally arranged in an arc extinguishing chamber, a contact block arranged on the rotating rod and a first screw sleeved in the contact block in a threaded manner, the top surface of the rotating rod is provided with a plug-in groove, and the plug-in groove is connected with the contact block in a threaded manner. A penetrating hole is formed in the top face of the contact block, a clamping groove is formed in the side wall of the penetrating hole, the first screw is arranged in the penetrating hole in a threaded and sleeved mode, the first screw is inserted in the inserting groove in a threaded mode, and the crest of the top of the first screw is clamped in the clamping groove. The arc moving contact has the advantages that the burnt arc moving contact is convenient to replace, and resources are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to arc extinguishing switch technical field especially is related to a kind of arc extinguishing structure. BACKGROUND

[0002] The working principle of load switch is mainly realized by the connection and disconnection of contact to control circuit, when operating load switch, its movable contact will contact or separate from static contact, so as to realize the connection or disconnection of circuit, in order to ensure the reliability and safety of load switch, its inside is usually also provided with arc extinguishing device, by setting arc movable contact and arc static contact in the arc extinguishing chamber of load switch, in the process of arc movable contact and arc static contact disconnection, arc is blown to arc extinguishing grid by magnetic blowing mode, long arc is cut off, so as to complete arc extinguishing, after multiple arc extinguishing operations, the end of arc movable contact is prone to burnout, the whole old arc movable contact needs to be detached from arc extinguishing device to replace new arc movable contact, and the replacement process is complicated, and arc movable contact only has end damage, and replacing the whole arc movable contact can cause resource waste.

[0003] For the above related technology, it is urgent to design and develop an arc extinguishing structure, which is convenient to replace the burned arc movable contact and saves resources. INVENTION CONTENTS

[0004] In order to replace the burned arc movable contact and save resources, the application provides an arc extinguishing structure.

[0005] The arc extinguishing structure provided by the application adopts the following technical scheme:

[0006] An arc extinguishing structure, including arc movable mechanism for arc splitting, the arc movable mechanism includes rotating rod rotatingly arranged in arc extinguishing chamber, contact block arranged on the rotating rod, and screw one threadedly sleeved in the contact block, the top surface of the rotating rod is provided with insertion slot, the top surface of the contact block is provided with through hole, the side wall of the through hole is provided with clamping groove, the screw one is threadedly sleeved in the through hole, the screw one is threadedly inserted in the insertion slot, and the tooth top of the top of the screw one is clamped in the clamping groove.

[0007] By adopting the above technical scheme, the rotating rod is rotatingly arranged in the arc extinguishing chamber, the top surface of the rotating rod is provided with insertion slot, the top surface of the contact block is provided with through hole, the side wall of the through hole is provided with clamping groove, the screw one is threadedly sleeved in the through hole, the screw one is threadedly inserted in the insertion slot, and the tooth top of the top of the screw one is clamped in the clamping groove, in the process of arc extinguishing, the rotating rod is arc movable contact, when the contact block at the end of the rotating rod burns, rotate the screw one, so that the screw one is separated from the rotating rod and the contact block, the clamping relationship between the contact block and the rotating rod is released, new contact block is replaced, and resources are saved.

[0008] Preferably, the arc-extinguishing chamber is arranged on the mounting base, the mounting base is provided with a mounting mechanism, the mounting mechanism comprises a mounting seat arranged on the mounting base, a mounting column arranged in the mounting seat, a connecting rod one connected with the arc-extinguishing chamber, a connecting rod two connected with the arc-extinguishing chamber and a rotating rod rotatably arranged on the mounting column, the connecting rod one is connected with the mounting column, the connecting rod two is connected with the mounting column, the rotating rod is arranged between the connecting rod one and the connecting rod two, and the rotating rod is detachably arranged on the rotating rod.

[0009] By adopting the above technical scheme, the mounting seat is arranged on the mounting base, the mounting column is arranged in the mounting seat, the connecting rod one is connected with the mounting column, the connecting rod one is connected with the arc-extinguishing chamber, the connecting rod two is connected with the mounting column, the connecting rod two is connected with the arc-extinguishing chamber, the rotating rod is arranged on the mounting column, the rotating rod is arranged between the connecting rod one and the connecting rod two, and the rotating rod is detachably arranged on the rotating rod, thereby enhancing the stability of the connection between the rotating rod and the arc-extinguishing chamber, and improving the stability of the rotating rod in the rotating process.

[0010] Preferably, a connecting screw is sleeved on the rotating rod, the connecting screw penetrates through the rotating rod, an abutting block is arranged on the side of the connecting screw away from the rotating rod, the abutting block abuts on the side of the rotating rod through a gasket, and a nut is sleeved on a section of thread of the connecting screw away from the abutting block, the nut abuts on the side of the rotating rod through a gasket.

[0011] By adopting the above technical scheme, the connecting screw is sleeved on the rotating rod, the connecting screw penetrates through the rotating rod, the abutting block is arranged on the side of the connecting screw away from the rotating rod, the abutting block abuts on the side of the rotating rod through a gasket, the nut is sleeved on a section of thread of the connecting screw away from the abutting block, and the nut abuts on the side of the rotating rod through a gasket, when it is needed to detach the rotating rod from the rotating rod, the nut is screwed to be separated from the connecting screw, the abutting block is slid in a direction away from the rotating rod, the connecting screw is separated from the rotating rod and the rotating rod, and the clamping relationship between the rotating rod and the rotating rod is released.

[0012] Preferably, an arc-extinguishing mechanism is arranged in the arc-extinguishing chamber, the arc-extinguishing mechanism comprises an arc static contact arranged in the arc-extinguishing chamber, a static contact arc striking angle arranged beside the arc static contact, a moving contact arc striking angle arranged above the static contact arc striking angle, an arc-extinguishing grid arranged in the arc-extinguishing chamber and a magnetic blow coil arranged below the static contact arc striking angle, the static contact arc striking angle is connected with the arc-extinguishing grid, the moving contact arc striking angle is connected with the arc-extinguishing grid, the contact block is designed to have the same voltage as the moving contact arc striking angle, and the arc static contact is designed to have the same voltage as the static contact arc striking angle.

[0013] By adopting the technical scheme, the arc static contact is arranged in the arc extinguishing chamber, the static contact arc leading angle is arranged beside the arc static contact, the arc extinguishing grid is arranged in the arc extinguishing chamber, the static contact arc leading angle is connected with the arc extinguishing grid, the dynamic contact arc leading angle is arranged above the static contact arc leading angle, the dynamic contact arc leading angle is connected with the arc extinguishing grid, the magnetic blow coil is arranged below the static contact arc leading angle, the contact block is designed to be at the same voltage as the dynamic contact arc leading angle, and the arc static contact is designed to be at the same voltage as the static contact arc leading angle. In the process of arc extinguishing, the contact block is disconnected from the arc static contact, the arc is transmitted between the dynamic contact arc leading angle and the static contact arc leading angle, the arc is blown to the arc extinguishing grid through the magnetic blow coil, and the arc extinguishing operation is completed.

[0014] Preferably, the arc extinguishing chamber comprises a storage bottom plate arranged on the mounting bottom plate, a clamping plate one arranged on the storage bottom plate, a vertical plate one arranged beside the clamping plate one, a vertical plate two arranged on the vertical plate one, and a top plate arranged above the storage bottom plate, the vertical plate one is detachably arranged on the clamping plate one by screws, the vertical plate two is detachably arranged on the storage bottom plate by screws, the top plate is arranged between the vertical plate one and the vertical plate two, and the vertical plate one, the top plate and the vertical plate two are connected by screws.

[0015] By adopting the technical scheme, the arc extinguishing chamber comprises a storage bottom plate arranged on the mounting bottom plate, a clamping plate one arranged on the storage bottom plate, a vertical plate one arranged beside the clamping plate one, a vertical plate two arranged on the vertical plate one, and a top plate arranged above the storage bottom plate, the vertical plate one is detachably arranged on the clamping plate one by screws, the vertical plate two is detachably arranged on the storage bottom plate by screws, the top plate is arranged between the vertical plate one and the vertical plate two, and the vertical plate one, the top plate and the vertical plate two are connected by screws. When maintenance and repair of the structure inside the arc extinguishing chamber are needed, the arc extinguishing chamber can be easily opened for maintenance through the clamping mode between the clamping plate one, the vertical plate one, the vertical plate two and the top plate.

[0016] Preferably, the arc extinguishing mechanism comprises an abutting piece one abutting with the arc extinguishing grid, the abutting piece one is arranged in the arc extinguishing chamber, the dynamic contact arc leading angle is connected with the abutting piece one by screws, and the dynamic contact arc leading angle is connected with the top plate by screws.

[0017] By adopting the technical scheme, the arc extinguishing mechanism comprises an abutting piece one abutting with the arc extinguishing grid, the abutting piece one is arranged in the arc extinguishing chamber, the dynamic contact arc leading angle is connected with the abutting piece one by screws, and the dynamic contact arc leading angle is connected with the top plate by screws. The stability of the connection between the dynamic contact arc leading angle and the arc extinguishing grid is improved.

[0018] Preferably, the arc extinguishing mechanism comprises an abutting piece two abutting with the arc extinguishing grid, the abutting piece two is arranged in the arc extinguishing chamber, the static contact arc leading angle is connected with the abutting piece two by screws, and the static contact arc leading angle is connected with the storage bottom plate by screws.

[0019] By adopting the technical scheme, the abutting piece two is arranged in the arc-extinguishing chamber, the abutting piece two abuts against the arc-extinguishing grid, the static contact arc leading angle is connected to the abutting piece two through a screw, and the static contact arc leading angle is connected to the placement bottom plate through a screw, thereby improving the stability of the connection between the static contact arc leading angle and the arc-extinguishing grid.

[0020] Preferably, the arc-extinguishing chamber comprises a placement plate arranged on the placement bottom plate and an abutting plate arranged on the placement plate, the placement plate is connected to the arc static contact, the abutting plate, the placement plate and the placement bottom plate are connected through a screw, and the static contact arc leading angle is arranged between the placement plate and the abutting plate.

[0021] By adopting the technical scheme, the placement plate is arranged on the placement bottom plate, the placement plate is connected to the arc static contact, the abutting plate is arranged on the placement plate, the abutting plate, the placement plate and the placement bottom plate are connected through a screw, and the static contact arc leading angle is arranged between the placement plate and the abutting plate, thereby improving the stability of the connection between the static contact arc leading angle and the arc static contact.

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

[0023] 1. The rotating rod is arranged in the arc-extinguishing chamber, a plug-in slot is arranged on the top surface of the rotating rod, a through hole is arranged on the top surface of the contact block, a clamping slot is arranged on the side wall of the through hole, a screw one is threadedly arranged in the through hole, the screw one is threadedly inserted into the plug-in slot, and the tooth of the top of the screw one is clamped in the clamping slot. In the process of arc extinguishing, the rotating rod is the arc moving contact, when the contact block at the end of the rotating rod is burned out, the rotating screw one is rotated to make the screw one separate from the rotating rod and the contact block, the clamping relationship between the contact block and the rotating rod is released, a new contact block is conveniently replaced, the entire rotating rod does not need to be replaced, and resources are saved.

[0024] 2. A connecting screw rod is arranged on the rotating rod, the connecting screw rod passes through the adapter rod, an abutting block is arranged on the side surface of the connecting screw rod away from the rotating rod, the abutting block abuts against the side surface of the adapter rod through a gasket, and a nut is threadedly arranged on a section of the connecting screw rod away from the abutting block. The nut abuts against the side surface of the rotating rod through a gasket. When the rotating rod needs to be detached from the adapter rod, the nut is twisted to separate from the connecting screw rod, the abutting block is slid in a direction away from the adapter rod, the connecting screw rod is separated from the rotating rod and the adapter rod, the clamping relationship between the rotating rod and the adapter rod is released, and the rotating rod is conveniently replaced.

[0025] 3. A storage bottom plate is arranged on the mounting bottom plate, a clamping plate one is arranged on the storage bottom plate, a vertical plate one is detachably arranged on the clamping plate one through screws, the top plate is arranged between the vertical plate one and the vertical plate two, the vertical plate one, the top plate and the vertical plate two are connected through screws, and the clamping mode among the clamping plate one, the vertical plate one, the vertical plate two and the top plate is adopted, so that when the structure inside the arc-extinguishing chamber needs to be maintained and repaired, the arc-extinguishing chamber can be easily opened for maintenance, and the operation time of the staff is saved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the arc-extinguishing structure in the embodiment of the application.

[0027] Figure 2 It is a schematic diagram of the internal structure of the arc-extinguishing chamber in the embodiment of the application.

[0028] Figure 3 It is a schematic diagram of the internal structure of the connection between the adapter rod and the rotating rod in the embodiment of the application.

[0029] MARKED FOR EXPLANATION:

[0030] 1, mounting bottom plate; 2, arc-extinguishing chamber; 21, storage bottom plate; 23, vertical plate one; 24, vertical plate two; 25, top plate; 26, storage plate; 27, abutting plate; 3, mounting mechanism; 31, mounting seat; 32, mounting column; 33, connecting rod one; 34, connecting rod two; 35, adapter rod; 4, arc-moving mechanism; 41, rotating rod; 411, plug-in slot; 412, connecting screw; 413, abutting block; 414, nut; 42, contact block; 421, through hole; 422, clamping slot; 43, screw one; 5, arc-extinguishing mechanism; 51, arc-static contact; 52, static contact arc-leading angle; 53, moving contact arc-leading angle; 54, arc-extinguishing grid; 55, abutting piece one; 56, abutting piece two; 57, magnetic blow coil. DETAILED DESCRIPTION

[0031] The following will be described in detail in combination with the accompanying Figures 1-3 The application will be further described in detail.

[0032] The embodiment of the application discloses an arc-extinguishing structure, referring to Figure 1 It is shown that the arc-extinguishing structure comprises a mounting bottom plate 1, an arc-extinguishing chamber 2, a mounting mechanism 3, an arc-moving mechanism 4 and an arc-extinguishing mechanism 5, the mounting bottom plate 1 is horizontally arranged, and the length direction of the mounting bottom plate 1 is parallel to the ground.

[0033] Referring to Figure 1 and Figure 2As shown, the arc-extinguishing chamber 2 comprises a storage bottom plate 21, a clamping plate one, a vertical plate one 23, a vertical plate two 24, a top plate 25, a storage plate 26 and an abutting plate 27. The storage bottom plate 21 is horizontally arranged on the top surface of the mounting bottom plate 1, and the length direction of the storage bottom plate 21 is the same as that of the mounting bottom plate 1.

[0034] Referring to Figure 1 and Figure 2 As shown, the clamping plate one is welded and fixed on one side surface of the storage bottom plate 21, and the length direction of the clamping plate one is the same as that of the storage bottom plate 21. The vertical plate one 23 is arranged beside the clamping plate one, and the length direction of the vertical plate one 23 is perpendicular to the top surface of the storage bottom plate 21. The length direction of the vertical plate two 24 is also perpendicular to the top surface of the storage bottom plate 21. The vertical plate one 23 is detachably arranged on the clamping plate one through screws. The top plate 25 is arranged between the vertical plate one 23 and the vertical plate two 24, and the length direction of the top plate 25 is the same as that of the storage bottom plate 21. The vertical plate one 23, the top plate 25 and the vertical plate two 24 are connected through screws.

[0035] Referring to Figure 1 and Figure 2 As shown, the storage plate 26 is arranged on the storage bottom plate 21, and the abutting plate 27 is arranged on the storage plate 26. The storage plate 26 is connected with the storage bottom plate 21 through screws. Through the clamping mode among the clamping plate one, the vertical plate one 23, the vertical plate two 24 and the top plate 25, when it is necessary to maintain and overhaul the structure inside the arc-extinguishing chamber 2, the arc-extinguishing chamber 2 can be easily opened for maintenance.

[0036] Referring to Figure 1 , Figure 2 and Figure 3 As shown, the arc-moving mechanism 4 comprises a rotating rod 41, a contact block 42 and a screw one 43. The top surface of the rotating rod 41 is provided with an insertion slot 411. The top surface of the contact block 42 is provided with a penetrating hole 421. The side wall of the penetrating hole 421 is provided with a clamping slot 422. The screw one 43 is threadedly sleeved in the penetrating hole 421, and is threadedly inserted in the insertion slot 411. The top of the screw one 43 is clamped in the clamping slot 422.

[0037] Referring to Figure 1 , Figure 2 and Figure 3 As shown, in the process of arc-extinguishing, the rotating rod 41 is the arc-moving contact. When the contact block 42 at the end of the rotating rod 41 is burned out, the screw one 43 is rotated to make the screw one 43 separate from the rotating rod 41 and the contact block 42, so as to release the clamping relationship between the contact block 42 and the rotating rod 41. The new contact block 42 can be replaced without replacing the entire rotating rod 41, thereby saving resources.

[0038] Referring to Figure 1 and Figure 2As shown, the mounting mechanism 3 comprises a mounting seat 31, a mounting column 32, a connecting rod one 33, a connecting rod two 34 and an adapter rod 35, the mounting seat 31 is detachably arranged on the mounting bottom plate 1 by screws, the mounting column 32 is arranged in the mounting seat 31, the connecting rod one 33 is connected with the mounting column 32, the connecting rod one 33 is connected with the vertical plate one 23, the connecting rod two 34 is connected with the mounting column 32, and the connecting rod two 34 is connected with the vertical plate two 24.

[0039] Referring to Figure 1 , Figure 2 and Figure 3 As shown, the adapter rod 35 is rotationally arranged on the mounting column 32, the adapter rod 35 is arranged between the connecting rod one 33 and the connecting rod two 34, a connecting screw rod 412 is sleeved on the rotating rod 41, the connecting screw rod 412 penetrates through the adapter rod 35, an abutting block 413 is arranged on the side of the connecting screw rod 412 away from the rotating rod 41, the abutting block 413 abuts on the side of the adapter rod 35 through a gasket, and a nut 414 is threadedly sleeved on a section of the connecting screw rod 412 away from the abutting block 413, and the nut 414 abuts on the side of the rotating rod 41 through a gasket.

[0040] Referring to Figure 1 , Figure 2 and Figure 3 When it is needed to detach the rotating rod 41 from the adapter rod 35, the nut 414 is screwed off the connecting screw rod 412, the abutting block 413 is slid away from the adapter rod 35, the connecting screw rod 412 is separated from the rotating rod 41 and the adapter rod 35, and the clamping relationship between the rotating rod 41 and the adapter rod 35 is released.

[0041] Referring to Figure 1 and Figure 2 As shown, the arc extinguishing mechanism 5 comprises an arc static contact 51, a static contact arc leading angle 52, a dynamic contact arc leading angle 53, an arc extinguishing grid 54, a magnetic blow coil 57, an abutting piece one 55 and an abutting piece two 56, the arc static contact 51 is arranged in the arc extinguishing chamber 2, the dynamic contact arc leading angle 53 is arranged above the static contact arc leading angle 52, the abutting piece one 55 abuts against the arc extinguishing grid 54, the dynamic contact arc leading angle 53 is connected with the abutting piece one 55 by screws, and the dynamic contact arc leading angle 53 is connected with the top plate 25 by screws.

[0042] Referring to Figure 1 and Figure 2 As shown, the static contact arc leading angle 52 is arranged beside the arc static contact 51, the static contact arc leading angle 52 is arranged between the object plate 26 and the abutting plate 27, the abutting piece two 56 abuts against the arc extinguishing grid 54, the static contact arc leading angle 52 is connected with the abutting piece two 56 by screws, and the static contact arc leading angle 52 is connected with the object bottom plate 21 by screws.

[0043] Referring to Figure 1 and Figure 2As shown, the arc extinguishing grid 54 is arranged in the arc extinguishing chamber 2, the static contact arc leading angle 52 is connected with the arc extinguishing grid 54, the dynamic contact arc leading angle 53 is connected with the arc extinguishing grid 54, the contact block 42 is designed with the same voltage as the dynamic contact arc leading angle 53, the arc static contact 51 is designed with the same voltage as the static contact arc leading angle 52, and the magnetic blow coil 57 is arranged below the static contact arc leading angle 52.

[0044] Referring to Figure 1 and Figure 2 As shown, in the process of arc extinguishing, the contact block 42 is disconnected with the arc static contact 51, the arc is transmitted between the dynamic contact arc leading angle 53 and the static contact arc leading angle 52, the arc is blown to the arc extinguishing grid 54 through the magnetic blow coil 57, and the arc extinguishing operation is completed.

[0045] The implementation principle of the arc extinguishing structure in the embodiment of the present application is as follows:

[0046] In the process of arc extinguishing, the rotating rod 41 is the arc dynamic contact, when the contact block 42 at the end of the rotating rod 41 is burned out, the rotating screw 43 is rotated to make the screw 43 be separated from the rotating rod 41 and the contact block 42, the clamping relationship between the contact block 42 and the rotating rod 41 is released, the new contact block 42 is convenient to replace, the whole rotating rod 41 does not need to be replaced, and the resources are saved.

[0047] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. An arc extinguishing structure comprising an arc moving mechanism (4) for performing arc splitting, characterized by: The arc movement mechanism (4) comprises a rotating rod (41) arranged in rotation in the arc extinguishing chamber (2), a contact block (42) arranged on the rotating rod (41), and a screw (43) threaded into the contact block (42), a plug-in groove (411) is formed on the top surface of the rotating rod (41), a through hole (421) is formed on the top surface of the contact block (42), a clamping groove (422) is formed on the side wall of the through hole (421), the screw (43) is threaded into the through hole (421), the screw (43) is threaded into the plug-in groove (411), and the tooth top of the screw (43) is clamped in the clamping groove (422).

2. An arc quenching structure according to claim 1, characterized in that: The arc extinguishing chamber (2) is arranged on the mounting base plate (1), the mounting base plate (1) is provided with a mounting mechanism (3), the mounting mechanism (3) comprises a mounting seat (31) arranged on the mounting base plate (1), a mounting column (32) arranged in the mounting seat (31), a connecting rod (33) connected with the arc extinguishing chamber (2), a connecting rod (34) connected with the arc extinguishing chamber (2), and a rotating rod (35) arranged in rotation on the mounting column (32), the connecting rod (33) is connected with the mounting column (32), the connecting rod (34) is connected with the mounting column (32), the rotating rod (35) is arranged between the connecting rod (33) and the connecting rod (34), and the rotating rod (41) is detachably arranged on the rotating rod (35).

3. An arc quenching structure according to claim 2, characterized in that: The connecting screw (412) is arranged on the rotating rod (41), the connecting screw (412) penetrates through the rotating rod (35), the side surface of the connecting screw (412) away from the rotating rod (41) is provided with an abutting block (413), the abutting block (413) abuts on the side surface of the rotating rod (35) through a gasket, and a nut (414) is threaded on a section of the connecting screw (412) away from the abutting block (413), and the nut (414) abuts on the side surface of the rotating rod (41) through a gasket.

4. An arc quenching structure as claimed in claim 2, wherein: The arc extinguishing chamber (2) is provided with an arc extinguishing mechanism (5), the arc extinguishing mechanism (5) comprises an arc static contact (51) arranged in the arc extinguishing chamber (2), a static contact arc striking angle (52) arranged beside the arc static contact (51), a moving contact arc striking angle (53) arranged above the static contact arc striking angle (52), an arc extinguishing grid (54) arranged in the arc extinguishing chamber (2), and a magnetic blow coil (57) arranged below the static contact arc striking angle (52), the static contact arc striking angle (52) is connected with the arc extinguishing grid (54), the moving contact arc striking angle (53) is connected with the arc extinguishing grid (54), the contact block (42) and the moving contact arc striking angle (53) are designed with equal voltage, and the arc static contact (51) and the static contact arc striking angle (52) are designed with equal voltage.

5. An arc quenching structure according to claim 4, characterized in that: The arc extinguishing chamber (2) comprises a storage bottom plate (21) arranged on the mounting bottom plate (1), a clamping plate one arranged on the storage bottom plate (21), a vertical plate one (23) arranged beside the clamping plate one, a vertical plate two (24) arranged on the vertical plate one (23), and a top plate (25) arranged above the storage bottom plate (21), the vertical plate one (23) is detachably arranged on the clamping plate one by screws, the vertical plate two (24) is detachably arranged on the storage bottom plate (21) by screws, the top plate (25) is arranged between the vertical plate one (23) and the vertical plate two (24), and the vertical plate one (23), the top plate (25) and the vertical plate two (24) are connected by screws.

6. An arc quenching structure according to claim 5, characterized in that: The arc extinguishing mechanism (5) comprises an abutting piece one (55) abutting against the arc extinguishing grid (54), the abutting piece one (55) is arranged in the arc extinguishing chamber (2), the moving contact arc striking angle (53) is connected with the abutting piece one (55) by screws, and the moving contact arc striking angle (53) is connected with the top plate (25) by screws.

7. An arc quenching structure as claimed in claim 5, wherein: The arc extinguishing mechanism (5) comprises an abutting piece two (56) abutting against the arc extinguishing grid (54), the abutting piece two (56) is arranged in the arc extinguishing chamber (2), the static contact arc striking angle (52) is connected with the abutting piece two (56) by screws, and the static contact arc striking angle (52) is connected with the storage bottom plate (21) by screws.

8. An arc quenching structure as claimed in claim 5, wherein: The arc extinguishing chamber (2) comprises a storage plate (26) arranged on the storage bottom plate (21) and an abutting plate (27) arranged on the storage plate (26), the storage plate (26) is connected with the arc static contact (51), the abutting plate (27), the storage plate (26) and the storage bottom plate (21) are connected by screws, and the static contact arc striking angle (52) is arranged between the storage plate (26) and the abutting plate (27).

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