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CN-224204052-U - High-voltage relay resistant to short-circuit large current

CN224204052UCN 224204052 UCN224204052 UCN 224204052UCN-224204052-U

Abstract

The present utility model relates to a relay structure. The utility model provides an anti short circuit heavy current's high voltage relay, including the bottom plate, install the housing on the bottom plate, install quiet contact on the housing, install push rod structure and movable contact in the housing, be equipped with the support in the housing, install first upper armature on the support, first upper armature is located the top of movable contact, install down the armature on the push rod structure, down the armature is located the below of movable contact, be equipped with the second upper armature in the top of movable contact, down the motion stroke of armature upward movement under the effect of push rod is first stroke, the motion stroke of armature upward movement is the second stroke under the effect of push rod on the second, the second stroke is greater than first stroke. The high-voltage relay structure for resisting short-circuit and large current has the advantages of simple structure, good reliability, effective prevention of short circuit and improvement of relay stability, and solves the technical problems that the high-voltage relay in the prior art cannot meet the requirements of large current passing and has unstable performance.

Inventors

  • CHEN JIANHUA
  • Xiong Jinchao

Assignees

  • 江西沃德尔电气有限公司

Dates

Publication Date
20260505
Application Date
20250530

Claims (9)

  1. 1. The utility model provides an anti short circuit heavy current's high voltage relay, includes the bottom plate, installs the housing on the bottom plate, installs quiet contact on the housing, installs push rod structure and movable contact in the housing, and push rod structure drives movable contact axial motion, its characterized in that: the novel electric power switch is characterized in that a bracket is arranged in the housing, a first upper armature is arranged on the bracket, the first upper armature is located above the movable contact piece, a lower armature is arranged on the push rod structure, the lower armature is located below the movable contact piece, a second upper armature is arranged above the movable contact piece, the movement stroke of the lower armature moving upwards under the action of the push rod is a first stroke, the movement stroke of the second upper armature moving upwards under the action of the push rod is a second stroke, and the second stroke is larger than the first stroke.
  2. 2. The high-voltage relay for resisting short-circuit high current according to claim 1, wherein the lower armature is U-shaped, and stepped surfaces are arranged on the inner walls of two vertically arranged plates of the lower armature and are positioned below the second upper armature.
  3. 3. The high-voltage relay resistant to short-circuit high currents of claim 1, wherein the push rod is sleeved with a second upper armature and a movable contact piece, the upper section of the push rod is a stepped shaft, and the end face of the second upper armature is abutted against a shaft shoulder of the stepped shaft.
  4. 4. The high-voltage relay of claim 1, 2 or 3, wherein the bracket comprises a frame-shaped base, a U-shaped frame is formed on the frame-shaped base, and a first upper armature is fixed on a beam of the frame through rivets.
  5. 5. The high-voltage relay of claim 1,2 or 3, wherein said second upper armature is positioned in a "U" shaped space defined by said lower armature.
  6. 6. The high-voltage relay for resisting short-circuit high currents according to claim 1, 2 or 3, wherein the end faces of two vertically arranged plates of the U-shaped lower armature are higher than the movable contact, and the length of the first upper armature is not smaller than the length of the horizontally arranged plates of the U-shaped lower armature.
  7. 7. The high-voltage relay according to claim 1, 2 or 3, wherein an air gap between the first upper armature and the lower armature is a, and an air gap between the second upper armature and the lower armature is b, a=b.
  8. 8. The high-voltage relay of claim 1, 2 or 3, wherein the first upper armature is fixed to the housing wall by riveting the bracket, and the second upper armature is fixed to the push rod by riveting the second upper armature to the gasket.
  9. 9. The high-voltage relay for resisting short-circuit high current according to claim 1, 2 or 3, wherein the bracket comprises a metal frame, the plastic layer is coated outside the metal frame, and the frame is fixed on the bottom plate through screws.

Description

High-voltage relay resistant to short-circuit large current Technical Field The utility model relates to a relay structure, in particular to a high-voltage relay resistant to short-circuit high current. Background A high-voltage relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), and is generally used in an automatic control circuit. A high-voltage relay is an electric appliance in which a controlled amount is changed in a predetermined step in an electric output circuit when a change in an input amount (excitation amount) of a high-voltage circuit reaches a predetermined requirement. The relay is a common component in a control circuit, the controlled quantity in the circuit is changed through the change of the input quantity, the purpose of automatic control and adjustment is achieved, the relay is widely applied to equipment such as new energy automobiles, charging piles, power electronic energy storage stations and the like, particularly in the control field of high-voltage loops, the relay bears important execution tasks, the suction and cutting-off actions of the high-voltage loops can be realized through the isolated operation of the working coils, and the working performance of the relay is related to the safe use of the high-voltage loops, so that the relay needs to have better current cutting-off capability and overload performance. The existing high-voltage relay generally comprises a shell, wherein a push rod, a movable contact piece and a static contact piece are arranged in the shell, and the contact and disconnection of the movable contact piece and the static contact piece ensure the on-off of the relay. Current relays generally allow current to pass through the relay is approximately 300A, but for special use occasions, the current required to pass through the relay is approximately 8000A, and short circuits are easy to occur for relays with high current requirements. Disclosure of Invention The high-voltage relay structure for resisting short-circuit and large current has the advantages of simple structure, good reliability, effective prevention of short circuit and improvement of relay stability, and solves the technical problems that the high-voltage relay in the prior art cannot meet the requirements of large current passing and has unstable performance. The technical problem is solved by the following technical scheme that the high-voltage relay for resisting short-circuit heavy current comprises a bottom plate, wherein a housing is arranged on the bottom plate, a static contact piece is arranged on the housing, a push rod structure and a movable contact piece are arranged in the housing, the push rod structure drives the movable contact piece to axially move, a support is arranged in the housing, a first upper armature is arranged on the support and is positioned above the movable contact piece, a lower armature is arranged on the push rod structure and is positioned below the movable contact piece, a second upper armature is arranged above the movable contact piece, the movement stroke of the lower armature which moves upwards under the action of the push rod is a first stroke, the movement stroke of the second upper armature which moves upwards under the action of the push rod is a second stroke, and the second stroke is larger than the first stroke. The movable iron core and the static iron core are arranged below the push rod, the push rod is driven to axially move upwards through electromagnetic force, the push rod drives the movable contact piece and the second upper armature to synchronously move upwards, after the movable contact piece is contacted with the static contact piece, the movable contact piece is not in upward movement due to contact with the static contact piece, the lower armature is positioned below the movable contact piece, the lower armature does not move continuously due to blocking of the movable contact piece, the push rod drives the second upper armature to move upwards, and the distance between the second upper armature and the lower armature is pulled away. When high current passes through the movable contact and the static contact, the current of the movable contact is increased, a magnetic field is generated, the upper armature and the lower armature generate electromagnetic attraction, the second upper armature is fixed on the push rod, and a large compensation force can be provided for short circuit, but an upper counter force can be formed on the push rod component, so that the first upper armature is fixed on the support, the compensation force required for short circuit resistance can be increased, the electromagnetic counter force can be prevented from affecting the electromagnetic mechanism, and the attraction stability of the movable contact and the static contact is enhanced. The two upper armatures act simultaneously, the magnetic conduction area of th