High-voltage relay

Abstract

The invention discloses a high-voltage relay, and relates to the technical field of relays, and the relay comprises an insulating cover which is disposed on a bottom plate, and forms a contact working space with the bottom plate; the insulation support is hollow, the side wall of the insulation support is provided with a side opening, the insulation support is located in the insulation cover, a side gap communicated with the side opening is formed between the side wall of the insulation support and the inner wall of the insulation cover, and the side gap extends to the bottom of the insulation support; the insulating bracket is arranged on the bottom plate, and a bottom gap communicated with the interior of the insulating bracket is formed between the bottom surface of the insulating bracket and the bottom plate; and the adapter surrounds the periphery of the bottom of the insulating support, the adapter is provided with an adapter cavity communicated with the side gap and the bottom gap, the adapter is fixedly arranged on the bottom plate, and the insulating cover is fixedly arranged on the adapter. The arc extinguishing effect in the relay is improved, and the use high-voltage upper limit of a relay product is improved.

Description

Technical Field

[0001] The present application relates to the technical field of relays, and in particular to a high-voltage relay. Background Art

[0002] As market demand continues to rise, the contactor industry is constantly innovating and upgrading its products. However, existing high-voltage relay products still have many shortcomings and need to be developed and improved. High-voltage relay products generally include a main contact mechanism and an auxiliary contact mechanism. The main contact mechanism includes a main moving contact and a main static contact, while the auxiliary contact mechanism includes an auxiliary moving contact and an auxiliary static contact.

[0003] Currently, high-voltage relays usually have an arc extinguishing function inside the insulation cover, which can meet the needs of general high-voltage environments. However, with the continuous development of the relay industry, relays tend to be more compact and miniaturized. As a result, under high-voltage working conditions with limited space in the insulation cover, the components inside the insulation cover are highly concentrated, resulting in the current arc extinguishing effect being unable to meet the needs of the relay. High-temperature arcs can easily damage the internal structure of the relay.

[0004] Therefore, in view of the above-mentioned defects, how to improve the arc extinguishing effect of the high-voltage relay is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a high-voltage relay, which improves the arc extinguishing effect inside the relay and increases the upper limit of the high voltage use of the relay product.

[0006] To achieve the above objectives, the present application provides a high-voltage relay, comprising:

[0007] An insulating cover is provided on the bottom plate and encloses the bottom plate to form a contact working space;

[0008] An insulating bracket having a hollow interior and a side opening provided on a side wall, the insulating bracket being located within the insulating cover, a side gap being provided between the side wall of the insulating bracket and the inner wall of the insulating cover and communicating with the side opening, and the side gap extending to the bottom of the insulating bracket; the insulating bracket being disposed on the bottom plate, and a bottom gap being provided between the bottom of the insulating bracket and the bottom plate and communicating with the interior of the insulating bracket;

[0009] The adapter surrounds the bottom of the insulating bracket and has an adapter chamber connected to the side gap and the bottom gap. The adapter is fixedly arranged on the bottom plate, and the insulating cover is fixedly arranged on the adapter.

[0010] Optionally, the adapter includes:

[0011] A lower folded edge fixedly connected to the bottom plate;

[0012] A connecting edge is formed by bending the lower folded edge upward, and the connecting edge is spaced apart from the insulating support;

[0013] An upper folding edge is formed by bending the connecting edge toward the insulating support. The upper folding edge extends toward the insulating support and is spaced apart from the insulating support to form a through opening connecting the side gap and the transition chamber.

[0014] Optionally, the upper folded edge is fixedly connected to the bottom surface of the insulation cover.

[0015] Optionally, a first rib is provided on the side wall of the insulating bracket having the side opening, the first rib protrudes from the side wall of the insulating bracket, and the first rib abuts against the inner wall of the insulating cover to form the side gap.

[0016] Optionally, a protruding foot is provided on the bottom surface of the insulating bracket, and the foot abuts against the bottom plate to form the bottom gap.

[0017] Optionally, the side opening is provided on a group of opposite side walls of the insulating bracket, and another group of opposite side walls of the insulating bracket are provided with second ribs, which abut against the inner wall of the insulating cover to form the side gap, and the height of the second rib is higher than that of the first rib.

[0018] Optionally, the transfer chamber is annular and arranged around the bottom of the insulating bracket; the bottom surfaces around the insulating bracket form a bottom gap with the bottom plate.

[0019] Optionally, the side gap formed by the insulating bracket and the insulating cover is annular, and the annular side gap is divided by a plurality of ribs provided on the insulating bracket.

[0020] Optionally, the width of the side gap is smaller than the width of the transition chamber.

[0021] Optionally, the top wall of the insulation cover is pressed against the upper surface of the insulation bracket to press the insulation bracket downward and lock it on the bottom plate.

[0022] The beneficial effect of the present application is that a side gap is formed between the insulating bracket and the side wall of the insulating cover, a bottom gap is formed between the bottom surface of the insulating bracket and the bottom plate, and a transition chamber connected to the side gap and the bottom gap is provided on the transition member, so that the side gap forms a first arc striking path for striking the arc toward the transition chamber ( Figure 1 and Figure 3 a in the figure), the bottom gap forms a second arc striking path to the transfer chamber ( Figure 1 and Figure 3b) in the figure, thereby forming arc extinguishing space in both the side gap and the transfer chamber, improving the arc extinguishing effect of the relay, meeting the arc extinguishing needs of relays with high component concentration inside the insulation cover, increasing the upper limit of the high voltage use of the relay product, and preventing high-temperature arcs from damaging the internal structure of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0024] Figure 1 A partial cross-sectional view of a high-voltage relay provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the insulating bracket structure provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the structure of the insulating bracket and the base plate provided in an embodiment of the present application;

[0027] Figure 4 A partial cross-sectional view from another perspective of the high-voltage relay provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the side gap arrangement structure provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the transfer chamber arrangement structure provided in an embodiment of the present application;

[0030] Figure 7 Schematic diagram of the exploded structure of the insulation cover, insulation bracket and base plate provided in the embodiment of the present application;

[0031] Figure 8 A schematic diagram of the structure of the insulating cover and the magnetic circuit mechanism provided in an embodiment of the present application;

[0032] Figure 9 A cross-sectional view of the insulation cover and magnetic circuit mechanism provided in an embodiment of the present application.

[0033] In the figure: 1 - insulation cover; 2 - insulation bracket; 3 - adapter; 4 - side gap; 5 - bottom gap; 6 - bottom plate; 7 - main static contact; 8 - terminal block; 9 - active contact; 10 - micro switch; 11 - follower arm; 12 - magnetic steel bracket; 13 - magnet; 14 - wire; 15 - U-shaped yoke; 16 - circuit board; 17 - coil bracket; 18 - coil; 19 - magnet; 20 - transmission rod;

[0034] 201-foot; 202-side opening; 203-first rib; 204-second rib;

[0035] 301-transfer chamber; 302-lower folding edge; 303-connecting edge; 304-upper folding edge; 305-opening;

[0036] 1201-wire segment; 1202-wire trough. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper," "lower," "front," and "back" are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] Please refer to Figures 1 to 9 In this embodiment, a high-voltage relay is provided. The relay includes an insulating cover 1, an insulating bracket 2, and an adapter 3. The insulating cover 1 may be a ceramic cover. The insulating cover 1 is disposed on a base plate 6 and cooperates with the base plate 6 to form a contact working space. Specifically, the insulating cover 1 is provided with a mounting structure for accommodating two main static contacts 7. The mounting structure may be an assembly hole provided on the insulating cover 1, and the main static contacts 7 may be fixed in the assembly hole. The main static contacts 7 are arranged in groups of two. At least one group of main static contacts 7 is provided on the insulating cover 1. The main static contacts 7 have contact ends extending into the interior of the insulating cover 1 and lead ends extending out of the exterior of the insulating cover 1. An external circuit may be electrically connected to the main static contacts 7 via the lead ends.

[0041] The insulating bracket 2 is fixedly mounted within the insulating cover 1. The insulating bracket 2 can be made of plastic. The insulating bracket 2 is hollow and has side openings 202 formed on its side walls. Specifically, the side openings 202 are formed on opposite side walls of the insulating bracket 2, exposing the internal components of the insulating bracket 2 through the side openings 202. It should be noted that the bottom of the side openings 202 does not reach the bottom of the insulating bracket 2, so that the side walls of the insulating bracket 2 have a certain height below the side openings 202.

[0042] On this basis, there is a side gap 4 between the side wall of the insulating bracket 2 located on the lower side of the side opening 202 and the inner wall of the insulating cover 1, and the side gap 4 is connected to the side opening 202, so that the arc inside the insulating bracket 2 can be led into the side gap 4 through the side opening 202 for arc extinguishing.

[0043] Furthermore, side gap 4 extends to the bottom of insulating support 2, which mates with bottom plate 6. A bottom gap 5 is defined between the bottom surface of insulating support 2 and the upper surface of bottom plate 6. Bottom gap 5 communicates with the interior of insulating support 2, thereby directing arcs within insulating support 2 to bottom gap 5. Furthermore, adapter 3 surrounds the bottom of insulating support 2 and includes a transition chamber 301 that communicates with side gap 4 and bottom gap 5. This allows arcs in side gap 4 and bottom gap 5 to enter transition chamber 301, where they are extinguished.

[0044] In addition, the side gap 4 is connected to the side opening 202, forming a channel for the lateral diffusion of the arc. When the contacts are disconnected and an arc is generated, high-temperature gas can enter the side gap 4 through the side opening 202, preventing the arc energy from accumulating near the contact. This design forces the arc to expand along a preset path, accelerating the arc elongation and cooling. Similarly, the bottom gap 5 allows the high-pressure gas generated by the arc to be discharged downward, preventing a sudden increase in gas pressure from causing the arc to reignite; the transition chamber 301 surrounds the bottom of the insulating bracket 2, connecting the side gap 4 and the bottom gap 5, forming an integrated gas buffer space, which merges and dilutes the laterally diffused arc gas with the vertically downward airflow in the transition chamber 301, avoiding local pressure concentration.

[0045] In summary of the above embodiments, the present application forms a side gap 4 between the insulating support 2 and the side wall of the insulating cover 1, forms a bottom gap 5 on the bottom surface of the insulating support 2 and the bottom plate 6, and provides a transition chamber 301 on the adapter 3 that is connected to the side gap 4 and the bottom gap 5, so that the side gap 4 forms a first arc striking path for striking the arc toward the transition chamber 301 ( Figure 1 and Figure 3 a in the figure), the bottom gap 5 forms a second arc striking path ( Figure 1 and Figure 3b), thereby forming arc extinguishing space in both the side gap 4 and the transfer chamber 301, improving the arc extinguishing effect of the relay, meeting the arc extinguishing requirements of the relay with a high concentration of components inside the insulating cover 1, improving the upper limit of the high voltage use of the relay product, and preventing high-temperature arc from damaging the internal structure of the relay.

[0046] Among them, the adapter 3 is fixed on the base plate 6, and the adapter chamber 301 is isolated from the outside air, that is, the adapter chamber 301 is connected with the interior of the insulating cover 1 and the interior of the insulating bracket 2 only through the side gap 4 and the bottom gap 5, thereby preventing external impurities from entering the adapter chamber 301, reducing the insulation strength of the gas medium in the adapter chamber 301, and increasing the risk of arc reignition.

[0047] The insulating cover 1 is fixed on the adapter 3, which serves as the intermediate support layer between the insulating cover 1 and the base plate 6, and evenly transfers mechanical loads (such as vibration and impact) to the base plate 6, preventing the insulating cover 1 from being directly deformed by force, significantly improving the overall anti-deformation ability, and ensuring the geometric stability of the contact working space.

[0048] The adapter 3 includes a lower folded edge 302, a connecting edge 303, and an upper folded edge 304. The lower folded edge 302 can be welded to the base plate 6, providing a stable support base and evenly distributing the pressure between the insulation cover 1 and the adapter 3 to the base plate 6. The connecting edge 303 is formed by bending the lower folded edge 302 upward, forming a rigid support frame. Its height can be flexibly adapted to the different sizes of insulation brackets 2. At the same time, it provides longitudinal expansion space for the adapter chamber 301, ensuring the expandable volume of the adapter chamber 301 and ensuring arc cooling efficiency.

[0049] The upper folded edge 304 is formed by bending the connecting edge 303 toward the insulating support 2, and the upper folded edge 304 extends toward the insulating support 2 and is spaced apart from it, thereby forming a through opening 305 connecting the side gap 4 and the transition chamber 301, so that the high-temperature arc can be led into the transition chamber 301.

[0050] Furthermore, the bottom surface of the insulating cover 1 can be fixedly connected to the upper folded edge 304 via a welding piece, thereby achieving stable fixation of the insulating cover 1.

[0051] After the adapter 3 is fixed to the bottom plate 6 and the insulating cover 1 by welding, an annular adapter chamber 301 with a certain width and thickness is formed between the adapter 3 and the insulating support 2 .

[0052] The side wall of the insulating bracket 2 having a side opening 202 is provided with a first rib 203, and the first rib 203 protrudes from the side wall of the insulating bracket 2, so that after the insulating cover 1 and the insulating bracket 2 are assembled, the first rib 203 abuts against the inner wall of the insulating cover 1 to form a side gap 4 between the inner wall of the insulating cover 1 and the outer wall of the insulating bracket 2.

[0053] A protruding foot 201 is provided on the bottom surface of the insulating bracket 2 , and the foot 201 abuts against the bottom plate 6 to form a bottom gap 5 .

[0054] The above mentioned side openings 202 are located on a set of opposite side walls of the insulating support 2, and a second rib 204 is provided on another set of opposite side walls of the insulating support 2. The second rib 204 abuts against the inner wall of the insulating cover 1 to form a side gap 4, so that the side gap 4 surrounds the outer periphery of the insulating support 2, and the annular side gap 4 can be connected to the annular transfer chamber 301.

[0055] In addition, since the first rib 203 is located on the lower side of the insulating bracket 2, in order to ensure the abutment stability between the insulating bracket 2 and the insulating cover 1, the height of the second rib 204 is higher than the first rib 203, so that the insulating bracket 2 abuts against the inner wall of the insulating cover 1 at different heights, thereby improving the stability of the insulating bracket 2 in the insulating cover 1.

[0056] In some embodiments, the bottom surfaces around the insulating bracket 2 form a bottom gap 5 with the bottom plate 6. It can be seen that the annular bottom gap 5 and the annular side gap 4 can be adapted to the annular transition chamber 301, so that when an arc is generated, the arc can be led into the transition chamber 301 around the insulating bracket 2.

[0057] The annular side gap 4 can be separated by ribs on multiple insulating brackets 2, thereby forming multiple independent side gaps 4, blocking the continuous development of the arc along the annular path, and significantly improving the electrical performance and reliability of the high-voltage relay through physical isolation and structural optimization.

[0058] In some embodiments, the width of the side gap 4 is smaller than the width of the transition chamber 301, that is, the high-temperature arc can be confined in the narrow gap of the side gap 4, and after entering the transition chamber 301, the heat dissipation volume is increased, forming a gas expansion buffer layer, realizing the attenuation of circuit energy, and improving the arc extinguishing effect.

[0059] The top wall of the insulating cover 1 presses against the upper surface of the insulating bracket 2, thereby pressing the insulating bracket 2 downward and locking it to the base plate 6, ensuring the stability of the insulating bracket 2. A magnetic steel bracket 12 is provided on the outside of the insulating cover 1. A magnet 13 is sandwiched between the magnetic steel bracket 12 and the side wall of the insulating cover 1. The magnetic steel bracket 12 and the magnet 13 are distributed on both sides of the insulating cover 1. The two magnetic steel brackets 12 extend toward the centerline of the insulating cover 1 and form a wire segment 1201 at the centerline of the insulating cover 1, away from the insulating cover 1. A wire groove 1202 is formed between the wire segment 1201 and the insulating cover 1. The wire 14 of the terminal block 8 passes through the wire groove 1202 and is led to the magnetic circuit mechanism on the bottom side of the insulating cover 1, where it is electrically connected to the circuit board 16 of the magnetic circuit mechanism.

[0060] Specifically, the magnetic circuit mechanism is located on the lower side of the insulating cover 1, and a shell is provided on the outer periphery of the magnetic circuit mechanism and the magnetic steel bracket 12. The top wall of the shell corresponds to the top wall of the insulating cover 1, and the side wall of the shell corresponds to the magnetic steel bracket 12 and the magnetic circuit mechanism. A base is provided at the bottom of the shell, and under the limiting action of the shell and the base, the insulating cover 1 and the magnetic circuit mechanism can be stably limited in the cavity structure; specifically, the top wall of the shell and the base cooperate to limit the insulating cover 1 and the magnetic circuit mechanism in the vertical direction, and the side wall of the shell can limit the insulating cover 1 and the magnetic circuit mechanism in the horizontal direction, thereby ensuring the stability of the insulating cover 1, the magnetic circuit mechanism and other components.

[0061] Furthermore, the magnetic circuit mechanism includes a stator assembly and a movable assembly extending into the insulating cover 1. The movable assembly is connected to an active contact 9 and a follower arm 11. The active contact 9 and the follower arm 11 are both located in the insulating bracket 2. The movable assembly moves under the drive of the stator assembly, thereby driving the active contact 9 and the follower arm 11 to move, thereby realizing electrical conduction of the main static contact 7. The follower arm 11 can correspond to the micro switch 10, so that the micro switch 10 can electrically conduct the two terminal blocks 8.

[0062] Among them, the mover assembly can be a transmission device including a magnet 19, and the stator assembly is a driving device including a coil 18. The coil 18 generates a magnetic field when powered, and the magnet 19 can drive the transmission device to move under the action of the magnetic field, thereby moving the active contact 9 and the follower arm 11.

[0063] Specifically, the stator assembly includes a U-shaped yoke 15, a coil bracket 17 and a coil 18. The U-shaped yoke 15 is fixed to the base, and the coil bracket 17 is located in the U-shaped structure of the U-shaped yoke 15. An axial cavity for movement of the stator assembly is provided in the middle of the coil bracket 17; the coil 18 is sleeved on the coil bracket 17 on the outer periphery of the axial cavity, and is used to generate a magnetic field that drives the magnet 19 to move axially.

[0064] The mover assembly includes a magnet 19, a transmission rod 20, and a lifting bracket. The magnet 19 is located in the axial cavity. One end of the transmission rod 20 is connected to the magnet 19, and the other end passes through the base plate 6 and extends into the insulating cover 1 and the insulating bracket 2. A lifting bracket is provided at the end, and the active contact 9 and the follower arm 11 are provided on the lifting bracket; the magnet 19 moves toward the insulating cover 1 in the magnetic field generated by the coil 18, thereby driving the transmission rod 20 to move toward the main static contact 7 (micro switch 10), and then the transmission rod 20 pushes the active contact 9 (follower arm 11) on the lifting bracket to move toward the main static contact 7 (micro switch 10), thereby realizing electrical conduction of the main static contact 7 and electrical conduction of the terminal 8.

[0065] Considering that the active contact 9 should be separated from the main static contact 7 after the magnetic field generated by the coil 18 disappears, an elastic member can be sleeved on the outer periphery of the transmission rod 20, and the elastic force of the elastic member can be used to reset the transmission rod 20 and the magnet 19, so that the active contact 9 and the follower arm 11 are ready for the next action.

[0066] Among them, the circuit board 16 can be set in the U-shaped yoke 15 to utilize the internal space of the U-shaped yoke 15 to avoid the circuit board 16 occupying additional space. The coil 18 and the wire 14 can be led out of the shell through the circuit board 16 to realize the connection between the coil 18 and the wire 14 and the external circuit.

[0067] In some embodiments, the height of the magnet 13 is lower than the upper surface of the magnetic support 12, and the height of the magnetic support 12 is higher than the upper surface of the insulating cover 1, thereby forming a glue groove; during assembly, after the terminal 8 is connected, glue is dispensed on the terminal 8 and the upper surface of the insulating cover 1, and the shell is installed after gluing. The glue covers the upper surface of the insulating cover 1 under the extrusion of the shell, thereby achieving effective insulation between the lead-out ends of the main static contacts 7, as well as effective insulation between the terminal 8 and between the terminal 8 and the lead-out end of the main static contact 7.

[0068] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0069] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core ideas of this application. It should be noted that for those skilled in the art, without departing from the principles of this application, various improvements and modifications can be made to this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A high voltage relay, characterized in that: include: An insulating cover (1) is provided on the base plate (6) and encloses the base plate (6) to form a contact working space; An insulating bracket (2) having a hollow interior and a side opening (202) provided on a side wall, the insulating bracket (2) being located in the insulating cover (1), a side gap (4) communicating with the side opening (202) being provided between the side wall of the insulating bracket (2) and the inner wall of the insulating cover (1), and the side gap (4) extending to the bottom of the insulating bracket (2); the insulating bracket (2) being arranged on the bottom plate (6), and a bottom gap (5) communicating with the interior of the insulating bracket (2) being provided between the bottom surface of the insulating bracket (2) and the bottom plate (6); The adapter (3) surrounds the bottom of the insulating bracket (2), and the adapter (3) has a adapter chamber (301) connected to the side gap (4) and the bottom gap (5). The adapter (3) is fixedly arranged on the bottom plate (6), and the insulating cover (1) is fixedly arranged on the adapter (3).

2. The high voltage relay according to claim 1, characterized in that: The adapter (3) comprises: A lower folding edge (302) is fixedly connected to the bottom plate (6); A connecting edge (303) is formed by bending the lower folding edge (302) upward, and the connecting edge (303) is spaced apart from the insulating support (2); An upper folded edge (304) is formed by bending the connecting edge (303) toward the insulating support (2), and the upper folded edge (304) extends toward the insulating support (2) and is spaced therefrom to form a through opening (305) connecting the side gap (4) and the transition chamber (301).

3. The high voltage relay according to claim 2, characterized in that: The upper folded edge (304) is fixedly connected to the bottom surface of the insulating cover (1).

4. The high voltage relay according to claim 1, characterized in that: The insulating support (2) has a side wall with the side opening (202) provided with a first rib (203), the first rib (203) protruding from the side wall of the insulating support (2), and the first rib (203) abutting against the inner wall of the insulating cover (1) to form the side gap (4).

5. The high voltage relay according to claim 1, characterized in that: The bottom surface of the insulating bracket (2) is provided with a protruding foot seat (201), and the foot seat (201) abuts against the bottom plate (6) to form the bottom gap (5).

6. The high voltage relay according to claim 4, characterized in that: The side opening (202) is provided on a group of opposite side walls of the insulating support (2), and another group of opposite side walls of the insulating support (2) is provided with a second rib (204), the second rib (204) abuts against the inner wall of the insulating cover (1) to form the side gap (4), and the height of the second rib (204) is higher than that of the first rib (203).

7. The high voltage relay according to claim 1, characterized in that: The transfer chamber (301) is annular and is arranged around the bottom of the insulating support (2); the bottom surfaces around the insulating support (2) form a bottom gap (5) with the bottom plate (6).

8. The high voltage relay according to claim 1, wherein: The side gap (4) formed by the insulating support (2) and the insulating cover (1) is annular, and the annular side gap (4) is divided by a plurality of ribs provided on the insulating support (2).

9. The high voltage relay according to claim 1, characterized in that: The width of the side gap (4) is smaller than the width of the transfer chamber (301).

10. The high voltage relay according to claim 1, characterized in that: The top wall of the insulating cover (1) is pressed against the upper surface of the insulating bracket (2) to press the insulating bracket (2) downward and lock it on the bottom plate (6).

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