A high-voltage vacuum electromagnetic relay

Abstract

The utility model discloses a high pressure vacuum electromagnetic relay, including ceramic cover shell, contact system and electromagnetic system, contact system sets up on ceramic bottom plate, and electromagnetic system is set up above contact system through support, ceramic cover shell is buckled on ceramic bottom plate and is sealed fixed with ceramic bottom plate through ceramic sealing technology, will contact system and electromagnetic system seal in the ceramic cover shell inner chamber, ceramic cover shell top is provided with the exhaust pipe of intercommunication its inner chamber, through the exhaust pipe to ceramic cover shell inner chamber vacuumizing, make contact system and electromagnetic system be in vacuum state. Adopted the ceramic cover shell and ceramic bottom plate of insulation, utilize ceramic material very high insulation resistance and dielectric strength, improve its medium withstand voltage capacity, and through the exhaust pipe to the vacuumizing processing of relay cavity inside, reduce the gas molecule in the cavity, prevent the damage that the arc to contact point caused when the load current passes to the ionization of gas molecule, promote product arc extinguishing capacity and load capacity.

Description

Technical Field

[0001] This utility model belongs to the field of relay manufacturing technology, and specifically relates to a high-voltage vacuum electromagnetic relay. Background Technology

[0002] With continuous technological development and innovation, high-voltage circuits are increasingly widely used in fields such as power systems, new energy vehicles, rail transportation, and industrial automation. Relays, as core components controlling the switching on and off of high-voltage circuits, are of paramount importance in terms of reliability and safety. Traditional high-voltage electromagnetic relays have deficiencies in insulation and arc-extinguishing capabilities because their housings and base plates are made of metal. The physical isolation distance between the metal base plate and the metal housing is too small, limiting their withstand voltage and insulation performance. Therefore, there is an urgent need to design an electromagnetic relay with higher insulation performance and arc-extinguishing capabilities. Summary of the Invention

[0003] To address the aforementioned problems in the existing technology, this utility model provides a high-voltage vacuum electromagnetic relay. The technical problem to be solved by this utility model is achieved through the following technical solution:

[0004] A high-voltage vacuum electromagnetic relay includes a ceramic housing, a contact system, and an electromagnetic system. The contact system is disposed on a ceramic base plate, and the electromagnetic system is disposed above the contact system via a bracket. The ceramic housing is fastened to the ceramic base plate and sealed to the ceramic base plate using a ceramic sealing process, sealing the contact system and the electromagnetic system within the inner cavity of the ceramic housing. An exhaust pipe communicating with the inner cavity is provided at the top of the ceramic housing, and a vacuum is evacuated through the exhaust pipe to bring the contact system and the electromagnetic system into a vacuum state.

[0005] Furthermore, the ceramic base plate has several grooves on its side, and the lower end of the bracket is fixed in the grooves.

[0006] Furthermore, the contact system includes a first stationary spring, a second stationary spring, and a movable spring disposed on the ceramic base plate; the first stationary spring and the second stationary spring are disposed opposite to each other, and the movable spring extends between the first stationary spring and the second stationary spring and contacts the first stationary spring;

[0007] The electromagnetic system includes: a coil assembly, an armature, an iron core, a first yoke, a second yoke, a restoring spring, and a push rod; the coil assembly is horizontally mounted on the bracket, the iron core passes through the coil assembly, and the first and second yokes are riveted to both ends of the iron core; the armature is rotatably connected to the bracket via a pin, with one end of the armature located inside the first yoke and the other end located outside the second yoke; the upper ends of the pin, the first yoke, and the second yoke are connected by a cover plate; the upper end of the push rod is fixed to the end of the armature near the second yoke, and the lower end is opposite to the moving spring; the restoring spring is located between the armature and the bracket, and is fitted and fixed on the pin, with one end of the restoring spring located inside the push rod and applying a reaction force to it.

[0008] Furthermore, the ceramic base plate is provided with a first input terminal, a second input terminal, a common output terminal, a first output terminal, and a second output terminal; the first input terminal and the second input terminal are electrically connected to the coil assembly; the common output terminal is electrically connected to the moving spring; the first output terminal is electrically connected to the first stationary spring; and the second output terminal is electrically connected to the second stationary spring.

[0009] Furthermore, damping springs are fixed to the upper ends of both the first and second yokes, and the top ends of the damping springs are in contact with the cover.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model employs an insulating ceramic housing and ceramic base plate. Utilizing the extremely high insulation resistance and dielectric strength of ceramic materials, it effectively isolates the ceramic base plate and housing from the internal conductive components of the relay, as well as from the various conductive components within the relay itself. This increases the conductive spacing, preventing breakdown between the internal conductive components of the relay and the base plate / housing housing, or between the internal conductive components of the relay themselves, under high-voltage conditions. This ensures the safety of the relay under high-voltage environments, thereby improving the relay's dielectric withstand voltage capability (≥5000Vr.ms) and insulation performance. Furthermore, by creating an exhaust hole on the top of the ceramic housing and welding an exhaust pipe, a vacuum is created inside the relay cavity after assembly, achieving a vacuum state with a vacuum degree requirement of ≤10. -5 Pa significantly reduces the number of gas molecules in the cavity, effectively preventing damage to the contacts caused by arcing of gas molecules when load current passes through, and greatly improving the product's arc extinguishing ability, load capacity and service life.

[0012] 2. By installing damping springs between the ceramic housing and the relay mechanism, the product's vibration resistance is ensured.

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the structure after removing the cover;

[0016] Figures 3-4 A schematic diagram of the welding groove between the ceramic base plate and the ceramic cover.

[0017] Figures 5-6 This is a schematic diagram of the electromagnetic system.

[0018] Figure 7 This is a schematic diagram of the contact system.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1-Ceramic housing; 2-Contact system; 3-Electromagnetic system; 4-Ceramic base plate; 5-Bracket; 6-Exhaust pipe; 7-Welding groove; 8-Damping spring; 2-1-First stationary spring; 2-2-Second stationary spring; 2-3-Moving spring; 2-4-First input terminal; 2-5-Second input terminal; 2-6-Common output terminal; 2-7-First output terminal; 2-8-Second output terminal; 3-1-Coil assembly; 3-2-Armature; 3-3-Core; 3-4-First yoke; 3-5-Second yoke; 3-6-Restoration spring; 3-7-Push rod; 3-8-Pin; 3-9-Cover plate; 4-1-Groove. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0022] Please also see Figures 1-7 This utility model provides a crystal-shell type high-voltage vacuum electromagnetic relay, specifically including a ceramic housing 1, a contact system 2, and an electromagnetic system 3. The contact system 2 is disposed on the ceramic base plate 4, and the electromagnetic system 3 is fixed above the contact system 2 by a bracket 5. The ceramic housing 1 is fastened to the ceramic base plate 4 and sealed to the ceramic base plate 4 by a ceramic sealing process, sealing the contact system 2 and the electromagnetic system 3 in the inner cavity of the ceramic housing 1. An exhaust pipe 6 is provided at the top of the ceramic housing 1, communicating with the inner cavity of the ceramic housing 1. The inner cavity of the ceramic housing 1 is evacuated through the exhaust pipe 6, so that the contact system 2 and the electromagnetic system 3 are in a vacuum state, thereby realizing the vacuum state of the electromagnetic relay, making the vacuum degree of the relay cavity ≤10. -5Pa effectively prevents the ionization of gas molecules.

[0023] Specifically, the connection between the ceramic base plate 4 and the ceramic cover 1 can be metallized and then sealed using a ceramic sealing process.

[0024] Furthermore, in order to improve the connection reliability between the ceramic base plate 4 and the ceramic housing 1, as well as the overall sealing performance of the relay, the welding groove 7 can be made after metallizing the welding parts of the ceramic base plate 4 and the ceramic housing 1, and then filled with solder before welding.

[0025] By insulating the ceramic housing and base plate, and utilizing the extremely high insulation resistance and dielectric strength of ceramic materials, the ceramic base plate and housing are effectively isolated from the internal conductive components of the relay, as well as from the individual conductive components within the relay. This increases the conductive spacing and prevents breakdown between the internal conductive components and the base plate / housing housing, or between the internal conductive components of the relay themselves, under high-voltage conditions. This ensures the safety of the relay under high-voltage environments and improves the relay's dielectric withstand voltage capability (≥5000Vr.ms) and insulation performance. Furthermore, by creating an vent hole on the top of the ceramic housing and welding an vent pipe, a vacuum is created inside the relay cavity after assembly, maintaining a vacuum level ≤10. -5 Pa can significantly reduce the number of gas molecules in the cavity, effectively preventing damage to the contacts caused by arcing of gas molecules when load current passes through, and greatly improving the product's arc extinguishing ability, load capacity and service life.

[0026] Furthermore, the ceramic base plate 4 has several grooves 4-1 on its side. The grooves 4-1 are metallized and then connected to the lower end of the bracket 5 through a ceramic-metal sealing process, which facilitates the fixing of the bracket.

[0027] It should be noted that the above structure can also be applied to balanced force electromagnetic relays or other applicable electromagnetic relays. Apart from that, the remaining structure of balanced force electromagnetic relays or other electromagnetic relays is consistent with the existing structure, and will not be described again in this embodiment.

[0028] Furthermore, the contact system 2 includes a first stationary spring 2-1, a second stationary spring 2-2, and a movable spring 2-3 disposed on the ceramic base plate 4. The first stationary spring 2-1 and the second stationary spring 2-2 are disposed opposite to each other. The movable spring 2-3 extends between the first stationary spring 2-1 and the second stationary spring 2-2 and contacts the first stationary spring 2-1. The movable spring 2-3 is forced away from the first stationary spring 2-1 and contacts the second stationary spring 2-2, thereby realizing contact switching.

[0029] The electromagnetic system 3 includes: a coil assembly 3-1, an armature 3-2, an iron core 3-3, a first yoke 3-4, a second yoke 3-5, a restoring spring 3-6, and a push rod 3-7; the coil assembly 3-1 includes a coil and a coil frame; the coil assembly 3-1 is horizontally mounted on the support 5, the iron core 3-3 passes through the coil assembly 3-1, and the first yoke 3-4 and the second yoke 3-5 are respectively riveted to both ends of the iron core 3-3; the armature 3-4... -2 is rotatably connected to the bracket 5 via pin 3-8, and one end of the armature 3-2 is located inside the first yoke 3-4, and the other end is located outside the second yoke 3-5. The pin, the upper ends of the first yoke 3-4 and the second yoke 3-5 are connected by cover plate 3-9. The upper end of the push rod 3-7 is fixed to the end of the armature 3-2 near the second armature 3-5, and the lower end is provided with an insulating ball, and the insulating ball is arranged opposite to the moving spring 2-3. The restoring spring is positioned between the armature 3-2 and the bracket 5, and is fitted and fixed on the pin 3-8. One end of the restoring spring 3-6 is located inside the push rod 3-7 and applies a certain reaction force to the push rod 3-7, preventing the armature 3-2 from rotating and causing the movable spring 2-3 to separate from the first stationary spring 2-1 when the coil is not energized. At this time, neither end of the armature 3-2 is in contact with the first yoke 3-4 or the second yoke 3-5. When the coil is energized, the armature 3-2 drives the pin 3-8, the restoring spring 3-6, and the push rod 3-7 to rotate. Simultaneously, the push rod 3-7 pushes the movable spring 2-3 towards the second stationary spring 2-2 until both ends of the armature 3-2 are attracted to the first yoke 3-4 and the second yoke 3-5. The armature 3-2 then stops rotating, and the movable spring 2-3 and the second stationary spring 2-2 achieve reliable contact, realizing contact switching.

[0030] Furthermore, the ceramic base plate 4 is also provided with a first input terminal 2-4, a second input terminal 2-5, a common output terminal 2-6, a first output terminal 2-7, and a second output terminal 2-8; the first input terminal 2-4 and the second input terminal 2-5 pass through the ceramic base plate 4 and are both electrically connected to the coil assembly 3-1; the common output terminal 2-6 is electrically connected to the moving spring 2-3; the first output terminal 2-7 is a normally closed terminal and is electrically connected to the first stationary spring 2-1; the second output terminal 2-8 is a normally open terminal and is electrically connected to the second stationary spring 2-2; the first input terminal 2-4, the second input terminal 2-5, the common output terminal 2-6, the first output terminal 2-7, and the second output terminal 2-8 are all fixed on the ceramic base plate 4 by a ceramic sealing process.

[0031] It should be noted that both the first stationary spring 2-1 and the second stationary spring 2-2 are composed of two parts: a spring and a contact point, and they make contact with the moving spring 2-3 through the contact point.

[0032] Furthermore, damping springs 8 are fixed to the upper ends of the first yoke 3-4 and the second yoke 3-5. The top of the damping spring 8 contacts the cover 1. The damping spring 8 improves the vibration resistance of the relay mechanism, namely the contact system 2 and the electromagnetic system 3.

[0033] The working process of the electromagnetic relay of this utility model is as follows:

[0034] When the coil is not energized, the armature 3-2 is in the released state under the reaction force of the return spring 3-6. The normally closed contact is in a conductive state, and the normally open contact is in a non-conductive state. That is, the moving spring 2-3 is in contact with the first stationary spring 2-1 and separated from the second stationary spring 2-2. When the rated voltage is applied to the coil, the electromagnetic field generated by the coil overcomes the reaction force of the return spring 3-6. Under the action of electromagnetic attraction, the armature 3-2 drives the push rod 3-7 to rotate. The push rod 3-7 pushes the moving spring 2-3 to move, so that the moving spring 2-3 is separated from the first stationary spring 2-1 and in contact with the second stationary spring 2-2. That is, the normally closed contact is in a non-conductive state, and the normally open contact is in a conductive state, thereby realizing the switching of the product contacts. When the coil is de-energized, due to the disappearance of electromagnetic attraction, the armature 3-2 returns to the released state under the action of the return spring 3-6 and the moving spring 2-3.

[0035] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0036] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A high-voltage vacuum electromagnetic relay, characterized in that, The system includes a ceramic housing, a contact system, an electromagnetic system, and a ceramic base plate. The contact system is mounted on the ceramic base plate, and the electromagnetic system is mounted above the contact system via a bracket. The ceramic housing is fastened to the ceramic base plate and sealed to it using a ceramic sealing process, thus sealing the contact system and the electromagnetic system within the inner cavity of the ceramic housing. An exhaust pipe is provided at the top of the ceramic housing, communicating with its inner cavity. The exhaust pipe is used to evacuate the inner cavity of the ceramic housing, thus placing the contact system and the electromagnetic system in a vacuum state.

2. The high-voltage vacuum electromagnetic relay according to claim 1, characterized in that, The ceramic base plate has several grooves on its side, and the lower end of the bracket is fixed in the grooves.

3. The high-voltage vacuum electromagnetic relay according to claim 1, characterized in that, The contact system includes a first stationary spring, a second stationary spring, and a movable spring disposed on the ceramic base plate; the first stationary spring and the second stationary spring are disposed opposite to each other, and the movable spring extends between the first stationary spring and the second stationary spring and contacts the first stationary spring; The electromagnetic system includes: a coil assembly, an armature, an iron core, a first yoke, a second yoke, a restoring spring, and a push rod; the coil assembly is horizontally mounted on the bracket, the iron core passes through the coil assembly, and the first and second yokes are riveted to both ends of the iron core; the armature is rotatably connected to the bracket via a pin, with one end of the armature located inside the first yoke and the other end located outside the second yoke; the upper ends of the pin, the first yoke, and the second yoke are connected by a cover plate; the upper end of the push rod is fixed to the end of the armature near the second yoke, and the lower end is opposite to the moving spring; the restoring spring is located between the armature and the bracket, and is fitted and fixed on the pin, with one end of the restoring spring located inside the push rod and applying a reaction force to it.

4. The high-voltage vacuum electromagnetic relay according to claim 3, characterized in that, The ceramic base plate is provided with a first input terminal, a second input terminal, a common output terminal, a first output terminal, and a second output terminal; the first input terminal and the second input terminal are electrically connected to the coil assembly; the common output terminal is electrically connected to the moving spring; the first output terminal is electrically connected to the first stationary spring; and the second output terminal is electrically connected to the second stationary spring.

5. The high-voltage vacuum electromagnetic relay according to claim 3, characterized in that, Both the first yoke and the second yoke have damping springs fixed to their upper ends, and the top of the damping springs is in contact with the cover.

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