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CN-224232591-U - Load switch

CN224232591UCN 224232591 UCN224232591 UCN 224232591UCN-224232591-U

Abstract

The application relates to the technical field of load switches, and discloses a load switch, which comprises a shell, a contact structure arranged on the shell, an arc extinguishing device and an operating mechanism, wherein the contact structure comprises a moving contact and a fixed contact, insulating sleeves are respectively connected between the moving contact, the fixed contact and the shell, the arc extinguishing device comprises an arc extinguishing chamber, an arc extinguishing sheet and an arc striking plate, the operating mechanism is used for driving the moving contact to be connected with or disconnected from the fixed contact, a rotating shaft is arranged on the insulating sleeve, the moving contact and the arc striking plate are both rotationally connected on the rotating shaft, the arc striking plate is connected with the moving contact, the operating mechanism can drive the moving contact to rotate around the rotating shaft, and when the moving contact is connected with the fixed contact, the arc striking plate stretches into the arc extinguishing chamber. According to the application, the arc striking plate and the moving contact are connected onto the rotating shaft in a common rotating way, so that the possibility of position deviation of the moving contact and the fixed contact during closing is reduced, the operating mechanism is not easy to damage, and the service life of the load switch is prolonged.

Inventors

  • HU BO
  • LI XINYAN
  • WANG YAMEI
  • ZHENG YUXI
  • LI XINFENG

Assignees

  • 乐清市森恒电器有限公司

Dates

Publication Date
20260512
Application Date
20250430

Claims (10)

  1. 1. The load switch comprises a shell (1), a contact structure (2) arranged on the shell (1), an arc extinguishing device (3) and an operating mechanism (4), wherein the contact structure (2) comprises a moving contact (21) and a fixed contact (22), an insulating sleeve (5) is connected between the moving contact (21), the fixed contact (22) and the shell (1), the arc extinguishing device (3) comprises an arc extinguishing chamber (31) for accommodating an arc, an arc extinguishing sheet arranged in the arc extinguishing chamber (31) and used for generating arc extinguishing gas, and an arc striking plate (32) used for guiding the arc into the arc extinguishing chamber (31), and the operating mechanism (4) is used for driving the moving contact (21) to be connected with or disconnected from the fixed contact (22), and is characterized in that a rotating shaft (51) is arranged on the insulating sleeve (5), the moving contact (21) is rotationally connected with the rotating shaft (51), the arc striking plate (32) is rotationally connected with the moving contact (21), and the operating mechanism (4) can rotate around the rotating shaft (21) to be connected with the fixed contact (21), and the arc extinguishing plate (32) rotates around the rotating shaft (21).
  2. 2. A load switch according to claim 1, wherein the arc extinguishing chamber (31) is disposed at one side of the fixed contact (22), the arc extinguishing chamber (31) is arc-shaped, the arc striking plate (32) comprises a movable portion (321) rotatably connected with the rotating shaft (51), and an arc striking portion (322) connected with the movable portion (321), and the arc striking portion (322) has the same arc as the arc of the arc extinguishing chamber (31).
  3. 3. A load switch according to claim 2, wherein an extension part (6) is arranged at one end of the side wall of the arc extinguishing chamber (31) close to the arc striking part (322), a guide hole (61) communicated with the arc extinguishing chamber (31) is formed in the extension part (6), a guide inclined surface (62) is arranged on the hole wall of the guide hole (61), and the guide inclined surface (62) is inclined towards the direction that the arc striking part (322) stretches into the arc extinguishing chamber (31).
  4. 4. A load switch according to claim 1, wherein the movable contact (21) comprises two oppositely arranged conductive strips (212), and the stationary contact (22) is clamped between the two conductive strips (212) when the movable contact (21) is connected with the stationary contact (22).
  5. 5. A load switch according to claim 4, wherein a connecting rod (213) is connected between the two conductive plates (212), limiting rings (214) are arranged at two ends of the connecting rod (213), the diameter of each limiting ring (214) is larger than that of the connecting rod (213), and the two limiting rings (214) are respectively arranged at one side of the two conductive plates (212) away from each other.
  6. 6. A load switch according to claim 5, wherein a compression spring (215) is connected between the stop collar (214) and the conductive plate (212).
  7. 7. A load switch according to claim 2, wherein the striking portion (322) is detachably connected to the movable portion (321).
  8. 8. A load switch according to claim 7, wherein a fixing bolt (324) is connected between the striking portion (322) and the movable portion (321).
  9. 9. A load switch according to claim 7, wherein the movable portion (321) comprises two movable pieces (323) disposed opposite to each other, and an installation gap (325) for the arc striking portion (322) to extend is formed between the two movable pieces (323).
  10. 10. The load switch of claim 9, wherein an adjusting bolt (326) is connected between the two movable plates (323), a fixed rod (216) is arranged on the movable contact (21), two opposite connecting plates (327) are arranged on the fixed rod (216) and the adjusting bolt (326) together, the two connecting plates (327) are positioned between the two movable plates (323), a roller (329) is connected to the adjusting bolt (326) in a rotating manner, the roller (329) is positioned between the two connecting plates (327), a waist-shaped hole (328) for the adjusting bolt (326) to penetrate through is formed in the connecting plates (327), the length of the waist-shaped hole (328) is larger than the diameter of the adjusting bolt (326), and when the adjusting bolt (326) slides in the waist-shaped hole (328), the movable plates (323) move towards or away from the movable contact (21).

Description

Load switch Technical Field The application relates to the technical field of load switches, in particular to a load switch. Background The load switch belongs to one of switching appliances, is arranged between a breaker and a disconnecting switch, is matched with a fuse to realize short-circuit protection, is provided with a simple arc extinguishing device, can safely break overload current ‌ which is a certain multiple of ‌ rated load currents ‌ and ‌, and is important switching equipment in a power system. In the related art, the load switch includes the casing, sets up contact structure, arc extinguishing device and operating mechanism on the casing, and contact structure includes moving contact and stationary contact, and arc extinguishing device is including the explosion chamber that is used for holding electric arc, the setting is used for producing the arc extinguishing piece of arc extinguishing gas in the explosion chamber, is used for guiding the arc to the striking board in the explosion chamber. When the moving contact and the fixed contact are disconnected or connected to generate an arc, the arc striking plate guides the arc into the arc extinguishing chamber, and then the arc extinguishing plate generates arc extinguishing gas at the high temperature of the arc so as to rapidly extinguish the arc, reduce the ablation of the arc on the moving contact and the fixed contact, and the operating mechanism comprises a plurality of mutually matched rotating shafts, connecting rods and the like so as to drive the moving contact and the fixed contact to be connected or disconnected. However, after the load switch is switched on and off for a long time, the operating mechanism is easy to loosen or abrade, so that the position of the moving contact is staggered when the moving contact is connected with the fixed contact, the operating mechanism is further damaged in the reverse direction, the actuating contact cannot be switched on and off with the fixed contact normally, and the service life of the load switch is short, so that the load switch needs to be improved. Disclosure of utility model In order to prolong the service life of the load switch, the application provides the load switch. The load switch provided by the application adopts the following technical scheme: the utility model provides a load switch, includes the casing, sets up contact structure, arc extinguishing device and operating mechanism on the casing, contact structure includes moving contact and stationary contact, all be connected with insulating sleeve between moving contact, stationary contact and the casing, arc extinguishing device is including the explosion chamber that is used for holding the electric arc, set up in the explosion chamber be used for producing the arc extinguishing gas the extinction piece, be used for guiding the electric arc to the striking board in the explosion chamber, operating mechanism is used for driving moving contact and stationary contact to be connected or break off, be equipped with the axis of rotation on the insulating sleeve, the moving contact rotates to be connected in the axis of rotation, the striking board is connected with the moving contact, operating mechanism can drive the moving contact and revolute the axis of rotation, when moving contact is connected with the stationary contact, the striking board stretches into in the explosion chamber. Through adopting above-mentioned technical scheme, when carrying out the switching-on operation, operating mechanism can drive the moving contact and revolute the rotation axis and rotate to make moving contact and stationary contact be connected, drive the arc striking board simultaneously and revolve the rotation axis synchronous rotation, make the arc striking board stretch into in the explosion chamber, realized moving contact divide-shut brake and the ‌ synchronism ‌ of arc striking board action. The arc striking plate moves in the arc extinguishing chamber in a fixed track, so that the arc striking plate can play a role in guiding the moving contact, and compared with the moving contact, the moving contact can rotate to a position aligned and connected with the fixed contact more accurately, and therefore the moving contact is not easy to stagger with the fixed contact during closing, and the operating mechanism is not easy to damage due to disorder of the moving contact, and the service life of the load switch is prolonged. When the brake is opened, the arc striking plate moves in the arc extinguishing chamber in a fixed track, so that the rotation of the moving contact is guided, and the rotation track and the position of the moving contact are more stable. Meanwhile, the arc striking plate automatically stretches into the arc extinguishing chamber along with the rotation of the contact, the arc is directly guided to enter the arc extinguishing region, compared with the fact that the arc striking plate is fixed or a driving source is a