WO2022095284A1 - Relais à haute capacité à contact auxiliaire fiable - Google Patents

Relais à haute capacité à contact auxiliaire fiable Download PDF

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Publication number
WO2022095284A1
WO2022095284A1 PCT/CN2021/073461 CN2021073461W WO2022095284A1 WO 2022095284 A1 WO2022095284 A1 WO 2022095284A1 CN 2021073461 W CN2021073461 W CN 2021073461W WO 2022095284 A1 WO2022095284 A1 WO 2022095284A1
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WO
WIPO (PCT)
Prior art keywords
auxiliary
lead
contact
reed
static
Prior art date
Application number
PCT/CN2021/073461
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English (en)
Chinese (zh)
Inventor
包锋
Original Assignee
苏州芯脉智能电子科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN202011212271.5A external-priority patent/CN112289644B/zh
Application filed by 苏州芯脉智能电子科技有限公司 filed Critical 苏州芯脉智能电子科技有限公司
Publication of WO2022095284A1 publication Critical patent/WO2022095284A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/541—Auxiliary contact devices

Definitions

  • the invention relates to the technical field of relays, in particular to a high-capacity relay with reliable auxiliary contacts isolated from the main circuit.
  • a relay is an electrical control device that makes a predetermined step change in the controlled quantity in the electrical output circuit when the change of the input quantity (excitation quantity) reaches the specified requirements. loop) and the controlled system (also known as the output loop), which play the roles of automatic adjustment, safety protection and conversion circuit in the circuit.
  • high-capacity relays are widely used in high-voltage DC loads such as vehicles, photovoltaics and charging piles.
  • auxiliary contacts In view of the above application scenarios of high-voltage DC loads, it is often necessary to set auxiliary contacts to monitor the status of the main contacts and perform low-voltage Linkage control to improve the safety and reliability of electrical equipment.
  • the high-voltage DC relay has a set of normally open auxiliary contacts added to the top of the ceramic cavity, and its structure is relatively simple , but because the main contacts and auxiliary contacts are distributed on the top of the ceramic at the same time, the high and low load isolation effect is poor; when the main contact disconnects the load, the arc is easy to escape to the auxiliary contacts, causing the high and low loads to be connected, and even burning the auxiliary contacts.
  • the switching logic of the auxiliary contacts of this structure is single, and the switching logic of the auxiliary contacts is synchronous with the main contacts, so it is difficult to realize the action under the opposite logic ;
  • the auxiliary contacts of this structure have a single form, only a normally open structure, which is difficult to meet the requirements of the relay for normally closed auxiliary contacts; the auxiliary contacts are large in size, usually only one set can be set on the top of the ceramic cavity, When multiple sets of auxiliary contacts need to be set, the relay structure increases in size, the structure is complex, the cost increases, and the reliability decreases simultaneously, which is not conducive to improving the market competitiveness of the product.
  • a high-capacity relay with reliable auxiliary contacts includes:
  • a shell the top of the shell is provided with an incoming line static contact and an outgoing line static contact, the incoming line static contact is used for receiving current from an external power supply device, and the outgoing line static contact is used for external
  • the electrical equipment transmits current, and the bottom of the casing is provided with a magnetic conductive block;
  • a push rod assembly comprising a push rod and a movable contact elastically connected with the push rod, the movable contact is accommodated in the inner cavity of the casing and can be relative to the casing along the height direction of the casing
  • the inner wall moves to switch on and off the incoming static contact and the outgoing static contact;
  • a sealing tube the top of the sealing tube is connected with the magnetic conductive block, the sealing tube accommodates a moving iron core, the moving iron core is connected with the push rod, and the end of the sealing tube is provided with a The bottom plate of the sealing tube is blocked, and a monitoring chamber is formed between the bottom plate and the moving iron core;
  • An auxiliary static reed is arranged on one end of one of the lead-out rods located in the monitoring chamber, and the other end of the lead-out rod in each group of the lead-out rods located in the monitoring chamber is provided with an auxiliary static reed.
  • the other two lead-out rods are respectively provided with auxiliary static reeds matched with the auxiliary moving reeds at one end located in the monitoring chamber;
  • the push rod assembly When the moving iron core moves in the sealing tube, the push rod assembly is moved to connect and disconnect the incoming line static contact and the outgoing line static contact, and squeeze or release the auxiliary moving reed to The auxiliary moving reed and the auxiliary static reed are turned on and off.
  • the auxiliary static reed is normally open or normally closed with the auxiliary movable reed.
  • connection between the lead-out rod and the bottom plate is fixed by means of glass frit.
  • a ceramic block is provided on the bottom plate, and the connection between the lead-out rod and the bottom plate is fixed by ceramic brazing.
  • a transition piece is respectively provided between the ceramic block and the lead-out rod and between the ceramic block and the bottom plate, and is fixed by high-temperature brazing, and the transition piece is made of pure material. Copper or Kovar.
  • the bottom plate and the sealing tube are hermetically connected by laser welding or resistance welding.
  • the contact portion between the auxiliary movable reed and the auxiliary static reed is a pair of convex points or riveted contact pieces or contacts that cooperate with each other.
  • the housing includes a ceramic cover and a transition block connected to the opening of the ceramic cover by high temperature brazing, and the magnetic conductive block is mounted on the bottom of the outer surface of the transition block.
  • the incoming static contacts and outgoing static contacts are arranged on the top of the housing, and the auxiliary contact components are arranged away from the top of the housing.
  • the isolation effect of the load; the main contact and the auxiliary contact assembly do not affect each other, which avoids the influence or damage to the auxiliary contact assembly caused by the arc generated during the operation of the main contact, improves the safety and reliability of the relay and prolongs the use of the relay.
  • auxiliary contact assembly is arranged on the bottom plate at the end of the sealing tube, which occupies a small area and does not increase the volume of the product, which improves the adaptability of the relay size to general electrical equipment, and its simple structure is conducive to improving the market competition of the product. force.
  • FIG. 1 is a schematic structural diagram of a high-capacity relay in an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional structure diagram of the high-capacity relay in the embodiment shown in FIG. 1;
  • FIG. 3 is a schematic diagram of an explosion structure of the high-capacity relay in the embodiment shown in FIG. 1;
  • FIG. 4 is a diagram of the cooperation relationship between a lead-out rod and a bottom plate in an embodiment of the present invention
  • FIG. 5 is a diagram showing the cooperation relationship between the lead-out rod and the bottom plate in another embodiment of the present invention.
  • the present invention provides a high-capacity relay 10 with reliable auxiliary contacts isolated from the main circuit.
  • the high-capacity relay 10 includes an incoming static contact 110 and
  • the housing 100 with the outgoing static contact 120 and the magnetic conductive block 130 at the bottom is accommodated in the inner cavity of the housing 100 and can move relative to the inner wall of the housing 100 along the height direction of the housing 100 to connect and disconnect the incoming static
  • the contact 110, the movable contact 210 of the outgoing static contact 120, and the push rod 220 elastically connected with the movable contact 210 to push the movable contact 210 to act together constitute the push rod assembly 200;
  • the top end is connected to the magnetic conductive block 130 and
  • the inner cavity accommodates the sealing tube 400 of the movable iron core 300 connected with the push rod 220 , the end of the sealing tube 400 is provided with a bottom plate 500 for sealing the sealing tube 400 , and a monitoring room 600 is formed between the bottom plate 500 and the movable iron core 300 ; and
  • the housing 100 is used to isolate the arc generated when the incoming static contact 110 and the outgoing static contact 120 are conducting through the movable contact 210 from the external environment, so as to improve the safety of the relay.
  • the housing 100 includes a ceramic casing 140 and a transition block 150 connected to the opening of the ceramic casing 140 by high temperature brazing.
  • the casing 100 may also be an integrally formed structure.
  • the ceramic cover 140 is used to block the metal spatter generated by the arc from burning the inner surface of the housing 100, so as to further improve the safety of the relay.
  • the incoming static contact 110 and the outgoing static contact 120 are the main contacts of the high-capacity relay 10 of this embodiment, wherein the incoming static contact 110 is used for receiving current from an external power supply device, and the outgoing static contact 120 is used for In order to transmit current to external electrical equipment, it can also be understood that the incoming static contact 110 and the outgoing static contact 120 can be regarded as the wires of the two poles of the relay respectively, and the two are jointly used to connect the relay with the external power supply and the load circuit to connect the relay with the external power supply and the load circuit. Conducive to the relay to make or break the circuit.
  • the magnetic conductive block 130 is made of ferromagnetic material and is used to isolate the auxiliary contact assembly 700 from the incoming line static contact 110 and the outgoing line static contact 120. Specifically, during the working process of the relay, the incoming line static contact 110 and The high-voltage end is connected to the static contact 120 of the outgoing line, which is the high-voltage end, and the auxiliary contact assembly 700 is the low-voltage end. The arc generated when the head 110 and the outgoing static contact 120 are connected travels to the auxiliary contact assembly 700 , so as to improve the safety of the relay and ensure the reliability of state monitoring through the auxiliary contact assembly 700 .
  • the bottom plate 500 is used to block the monitoring chamber 600 to ensure the reliability of the relay state monitoring operation by the auxiliary contact assembly 700 .
  • the bottom plate 500 and the sealing tube 400 are hermetically connected by laser welding or resistance welding.
  • the inner cavity of the casing 100 is filled with gas, and the sealing connection method of laser welding or resistance welding ensures the sealing of the casing 100 to avoid the occurrence of gas leakage.
  • the lead-out rod 710 is used for electrical connection with external electrical equipment or control equipment, and is used for sending state information inside the relay to the external electrical equipment or control equipment for monitoring and analysis, so as to grasp the state parameters in the relay.
  • the connection between the lead-out rods 710 and the bottom plate 500 is fixed by glass sintering. After glass sintering, the gap between each lead-out rod 710 and the bottom plate 500 is filled with a glass body 740 , so as to achieve The purpose of improving the connection strength of the lead-out rod 710 and the bottom plate 500 and improving the air tightness of the monitoring room 600 .
  • a ceramic block 750 is disposed on one side of the bottom plate 500 , and the connection between the lead-out rod 710 and the bottom plate 500 is fixed by ceramic brazing.
  • the ceramic block 750 can be arranged either on the top of the bottom plate 500 or on the bottom of the bottom plate 500 , depending on the size of the monitoring chamber 600 .
  • a transition piece is respectively disposed between the ceramic block 750 and the lead-out rod 710 and between the ceramic block 750 and the bottom plate 500 and fixed by high temperature brazing, and the transition piece is made of pure copper or kovar. Alloys (ie iron-nickel-cobalt alloys).
  • transition pieces made of pure copper or Kovar alloy are arranged on the mating surface between the ceramic block 750 and the lead-out rod 710 and the mating surface between the ceramic block 750 and the bottom plate 500, high temperature brazing is performed to improve the connection quality And the purpose of sealing quality.
  • the auxiliary moving reed 730 is used to connect or disconnect with the auxiliary static reed 720 under the action of the moving iron core 300 to change the potential value output to the external electrical equipment, so that the operator can judge the relay according to the potential value of the external electrical equipment working status.
  • the contact portion of the auxiliary moving reed 730 and the auxiliary static reed 720 is a pair of convex points or riveted contact pieces or contacts that cooperate with each other.
  • connection portion between the auxiliary moving reed 730 and the auxiliary static reed 720 may also adopt other matching forms, so as to facilitate the connection and disconnection of the auxiliary moving reed 730 and the auxiliary static reed 720 , which will not be repeated here.
  • the 720 and the auxiliary moving reed 730 can be designed as a normally open structure or a normally closed structure, that is, the auxiliary static reed 720 and the auxiliary moving reed 730 are normally open or normally closed.
  • the combination of the auxiliary contact assemblies 700 can be combined according to the use scene of the relay.
  • the auxiliary contact assembly 700 when the auxiliary contact assembly 700 includes two sets of auxiliary contact units, it can be two sets of normally open auxiliary contact units. Contact units, two sets of normally closed auxiliary contact units, two sets of conversion type auxiliary contact units, and any combination of the three types of auxiliary contact units will not be repeated here.
  • the monitoring principle of the relay state by the auxiliary contact assembly 700 of the present invention is as follows: when the moving iron core 300 moves in the sealing tube 400, it will drive the push rod assembly 200 to move to connect and disconnect the incoming line static contact 110 and the outgoing line static contact 120, And squeeze or release the auxiliary movable reed 730 to connect and disconnect the auxiliary movable reed 730 and the auxiliary static reed 720 .
  • m 2
  • the auxiliary static reed 720 and the auxiliary movable reed 730 are normally closed cooperation structures for illustration.
  • the auxiliary moving reed 730 and the auxiliary static reed 720 are closed.
  • the moving iron core 300 When the moving iron core 300 is energized, the moving iron core 300 moves toward the top of the housing 100. During this process, the moving iron core 300 leaves the auxiliary moving reed 730, so that the auxiliary moving iron core 300 moves away from the auxiliary moving reed 730.
  • the leaf 730 is separated from the auxiliary static reed 720, and at the same time, the moving iron core 300 pushes the push rod 220, and then pushes the moving contact 210 to connect with the incoming static contact 110 and the outgoing static contact 120 respectively, so as to conduct conduction In this way, when the electrical equipment connected to the group of lead-out rods 710 of the auxiliary contact assembly 700 does not detect the electrical signal or the electrical signal suddenly changes to zero, it can be judged that the relay is in the ON state.
  • auxiliary static reed 720 and the auxiliary movable reed 730 are normally open matching structures, the monitoring logic of the relay is reversed, that is, when the electrical signal monitored by the external electrical equipment suddenly changes to zero, it can be judged that the relay is disconnected. state.
  • the incoming line static contact 110 and the outgoing line static contact 120 are arranged on the top of the housing 100, and the auxiliary contact assembly 700 is arranged on the top of the housing 100.
  • the bottom plate 500 is arranged away from the top of the casing 100, and a magnetic conductive block is arranged at the bottom of the casing 100 to isolate the high and low voltage loads, thereby increasing the distance between the main contact and the auxiliary contact assembly 700, thereby increasing the creepage
  • the electrical distance and the air distance improve the isolation effect of high and low loads; the main contact and the auxiliary contact assembly 700 do not affect each other, which avoids the influence or damage to the auxiliary contact assembly 700 caused by the arc generated during the operation of the main contact.
  • the safety and reliability of the use of the relay are improved and the service life of the relay is prolonged; by setting one or more lead-out rods 710 and auxiliary contacts installed on the lead-out rods 710, the number of auxiliary contacts can be adjusted according to the needs of users. and the matching method are selected to meet the needs of use; in addition, the auxiliary contact assembly 700 is arranged on the bottom plate 500 at the end of the sealing tube 400, which occupies a small area and does not increase the volume of the product, which improves the size of the relay to the general electrical
  • the adaptability of the equipment and its simple structure are conducive to enhancing the market competitiveness of the product.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Contacts (AREA)

Abstract

La présente invention se rapporte au domaine technique des relais. Un relais à haute capacité à un contact auxiliaire fiable est divulgué, comprenant : un boîtier pourvu d'un contact fixe de fil entrant et d'un contact fixe de fil sortant au niveau de sa partie supérieure et d'un bloc conducteur magnétique au niveau de sa partie inférieure ; un ensemble tige de poussée constitué d'un contact mobile installé dans le boîtier et d'une tige de poussée reliée élastiquement au contact mobile ; un tube scellé relié au bloc conducteur magnétique, sa cavité interne recevant un noyau de fer mobile relié à la tige de poussée, et une chambre de surveillance étant formée entre une plaque de base au niveau d'une extrémité terminale du tube scellé et le noyau de fer mobile ; et un ensemble de contact auxiliaire comprenant au moins un ensemble de tiges de sortie insérées dans la plaque de base, chaque ensemble de tiges de sortie comprenant m tiges de sortie, m étant égal à 2 ou 3, lorsque m = 2, chaque ensemble de tiges de sortie étant respectivement pourvu d'une plaque de ressort fixe auxiliaire et d'une plaque de ressort mobile auxiliaire, lorsque m = 3, la tige de sortie intermédiaire dans chaque ensemble de tiges de sortie étant pourvue d'une plaque de ressort mobile auxiliaire et les deux autres tiges de sortie étant respectivement pourvues de plaques de ressort stationnaires auxiliaires, et le noyau de fer mobile entraînant l'ensemble tige de poussée à se déplacer de manière à connecter ou déconnecter le contact fixe de fil entrant et le contact fixe de fil sortant et à presser ou libérer la plaque de ressort mobile auxiliaire de façon à connecter ou déconnecter l'ensemble de contact auxiliaire.
PCT/CN2021/073461 2020-11-03 2021-01-23 Relais à haute capacité à contact auxiliaire fiable WO2022095284A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011212271.5A CN112289644B (zh) 2020-11-03 一种带有可靠辅助触点的高容量继电器
CN202011212271.5 2020-11-03

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WO2022095284A1 true WO2022095284A1 (fr) 2022-05-12

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006179349A (ja) * 2004-12-22 2006-07-06 Matsushita Electric Works Ltd 電磁リレー
CN205428834U (zh) * 2016-03-17 2016-08-03 尼普顿电器（昆山）有限公司 带辅助开关装置的高压直流继电器
CN108447739A (zh) * 2018-03-23 2018-08-24 浙江瑞光新能源科技有限公司 带辅助触头的陶瓷封装高压直流接触器
CN110211844A (zh) * 2019-05-21 2019-09-06 厦门宏发电力电器有限公司 一种带辅助触点的高压直流继电器
CN209729832U (zh) * 2019-06-23 2019-12-03 长沙中坤电气科技股份有限公司 一种带辅助触点的高压直流继电器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006179349A (ja) * 2004-12-22 2006-07-06 Matsushita Electric Works Ltd 電磁リレー
CN205428834U (zh) * 2016-03-17 2016-08-03 尼普顿电器（昆山）有限公司 带辅助开关装置的高压直流继电器
CN108447739A (zh) * 2018-03-23 2018-08-24 浙江瑞光新能源科技有限公司 带辅助触头的陶瓷封装高压直流接触器
CN110211844A (zh) * 2019-05-21 2019-09-06 厦门宏发电力电器有限公司 一种带辅助触点的高压直流继电器
CN209729832U (zh) * 2019-06-23 2019-12-03 长沙中坤电气科技股份有限公司 一种带辅助触点的高压直流继电器

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