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CN-224204055-U - Power relay with short-circuit current resistance function

CN224204055UCN 224204055 UCN224204055 UCN 224204055UCN-224204055-U

Abstract

The utility model discloses a power relay with a short-circuit current resistance function, which relates to the technical field of power relays and comprises a relay shell; the relay comprises a relay shell, a relay base, a coil assembly, an armature spring, a movable contact structure and a movable contact structure, wherein the relay base is arranged in the relay shell, the coil assembly is arranged on one side of the interior of the relay base and extends to the bottom of the relay base, the armature spring is in contact with the coil assembly and is arranged above the coil assembly, the movable contact structure is in contact with the armature spring and is arranged on the side face of the coil assembly, and the movable contact structure extends to the bottom of the relay base. According to the utility model, the electrostatic terminal pin of the power relay and the current flow direction of the elastic sheet are opposite, and the Lorenter magnetic force generated by the current is repulsive, namely, the riveting contact on the elastic sheet is pushed to the reed contact, so that the electric repulsive force generated by short-circuit current is overcome, the safety protection of a relay product is realized, and the safety and the service life reliability of the relay in the use process are greatly improved.

Inventors

  • YUE XIUFENG
  • ZHANG PENGLIN

Assignees

  • 深圳高登电科股份有限公司

Dates

Publication Date
20260505
Application Date
20250522

Claims (6)

  1. 1. A power relay with a short-circuit current resistance function is characterized by comprising a relay housing (10), a relay base (20) arranged in the relay housing (10), a coil assembly (30) arranged on one side in the relay base (20) and extending to the bottom of the relay base (20), an armature spring (40) which is in contact with the coil assembly (30) and is arranged above the coil assembly (30), a movable contact structure (50) which is in contact with the armature spring (40) and is arranged on the side surface of the coil assembly (30), wherein the movable contact structure (50) extends to the bottom of the relay base (20), The movable contact structure (50) comprises a relay reed (501) arranged in the relay base (20) and extending to the outer side of the relay base (20), a relay spring plate (502) arranged on one side of the top of the relay reed (501), a first contact (503) arranged on the inner side of the bottom of the relay spring plate (502), a reed electric shock assembly (504) arranged on the side face of the first contact (503), and an armature reed (40) which is in contact with the reed electric shock assembly (504).
  2. 2. A power relay with short-circuit current resistance function according to claim 1, characterized in that the space inside the relay base (20) is divided into two parts by an intermediate partition plate (201) at the inner center of the relay base (20), one side of the intermediate partition plate (201) close to the relay reed (501) is divided into four parts by a plurality of side partition plates (202), the side of the side partition plates (202) is provided with a reed electric shock assembly (504), The top of the middle partition plate (201) is elastically provided with an armature spring (40).
  3. 3. A power relay with short-circuit current resistance according to claim 1, wherein a coil foot (301) is led out from the bottom of the coil assembly (30), a plurality of coil feet (301) are arranged, and a plurality of coil feet (301) extend to the lower part of the relay base (20).
  4. 4. The power relay with short-circuit current resistance function according to claim 3, wherein the relay spring plate (502) is bent, a gap is left between the relay spring plate (502) and the relay spring plate (501), the direction of short-circuit current inside the relay spring plate (502) and the direction of Lorentz magnetic force generated by the first contact (503) are relatively vertical, The relay reed (501) is recessed inwards on one side close to the bottom of the first contact (503), and a static terminal pin (5011) extending to the outer side of the relay base (20) is arranged at the bottom of the relay reed (501).
  5. 5. A power relay with short-circuit current resistance according to claim 2, wherein the reed electric shock assembly (504) comprises a second contact (5041) abutting against the side surface of the first contact (503), a first movable reed (5042) mounted on the outer side of the second contact (5041), a second movable reed (5043) mounted on the side surface of the first movable reed (5042), an auxiliary movable terminal (5044) abutting against the second movable reed (5043), and an armature reed (40) abutting against the auxiliary movable terminal (5044).
  6. 6. The power relay with short-circuit current resisting function according to claim 5, wherein the length of the first movable reed (5042) is smaller than that of the second movable reed (5043), the first movable reed (5042) and the second movable reed (5043) are both elastically arranged inside the relay base (20), The auxiliary movable terminal (5044) is elastically arranged in the injection molding piece (5045), and the injection molding piece (5045) is arranged on one side of the top of the middle partition plate (201).

Description

Power relay with short-circuit current resistance function Technical Field The utility model relates to the technical field of power relays, in particular to a power relay with a short-circuit current resistance function. Background A power relay is a device that produces transitions in one or more electrical output circuits when an input (or excitation) meets certain prescribed conditions. The neutral point direct grounding system can be used as a directional element for zero-sequence current protection. With the development of new energy technologies such as photovoltaic energy storage, solar energy, wind energy and the like, the safety conditions for the use of the power relay are more and more severe, and meanwhile, the service life of the relay is also more and more required. The prior Chinese patent with the bulletin number of CN220138207U discloses a power relay, which comprises a shell, a relay pin, a PCB, an LCD indicator lamp, a resetting piece, an armature, an iron yoke, a fixed connecting frame, an electromagnetic structure, a reed, a polar cap, a movable contact, an upper fixed contact and a lower fixed contact, wherein the relay pin comprises a relay first pin, a relay second pin, a relay third pin and a relay fourth pin, the relay first pin is connected with the PCB, the PCB is fixedly arranged in the shell, the LED indicator lamp is arranged on the PCB, the LED indicator lamp is electrically connected with the PCB, the fixed connecting frame is fixedly connected with the reed, the reed is provided with the movable contact, the relay third pin is connected with the lower fixed contact, and the relay fourth pin is connected with the upper fixed contact. According to the LED surface mount indicator, the light-emitting mode of the LED surface mount indicator is cold light-emitting, a large amount of heat is not generated in the light-emitting process, and the temperature is not obviously improved, so that compared with the LED light-emitting lamp beads, no extra heat is generated, and the ageing of equipment caused by heat accumulation due to temperature rise is reduced. At present, the conventional power relay has the following problems: When the power relay operates, when the circuit generates short-circuit current, the traditional power relay has weak short-circuit current resistance (or does not have short-circuit current resistance), so that electric repulsive force can be generated near an internal contact point of the power relay due to rapid current shrinkage, and further the power relay is easy to burn out, lose efficacy and cannot work normally, and the safety is low. Disclosure of utility model The utility model aims to provide a power relay with a short-circuit current resistance function, so as to solve the problems in the background technology. In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: the utility model provides a power relay with a short-circuit current resistance function, which comprises a relay shell, a relay base arranged in the relay shell, a solenoid assembly arranged on one side of the relay base and extending to the bottom of the relay base, an armature spring sheet which is in contact with the solenoid assembly and is arranged above the solenoid assembly, a movable contact structure which is in contact with the armature spring sheet and is arranged on the side surface of the solenoid assembly, wherein the movable contact structure extends to the bottom of the relay base, The movable contact structure comprises a relay reed arranged in the relay base and extending to the outer side of the relay base, a relay spring plate arranged on one side of the top of the relay reed, a first contact arranged on the inner side of the bottom of the relay spring plate, a reed electric shock assembly arranged on the side face of the first contact, and an armature reed which is in contact with the reed electric shock assembly. Preferably, the space inside the relay base is divided into two parts by an intermediate baffle at the inner center of the relay base, one side of the intermediate baffle, which is close to the relay reed, is divided into four parts by a plurality of side baffles, reed electric shock assemblies are arranged on the side surfaces of the side baffles, The top of the middle partition plate is elastically provided with an armature spring. Preferably, coil feet are led out from the bottom of the coil assembly, a plurality of coil feet are arranged, and the coil feet extend to the lower side of the relay base. Preferably, the relay spring plate is arranged in a bent shape, a gap is reserved between the relay spring plate and the relay spring plate, the short circuit current direction inside the relay spring plate and the Lorentz magnetic force direction generated by the first contact are relatively and vertically arranged, The relay reed is recessed towards the inner side near one side of the bottom of the firs