Relay

Abstract

The present disclosure relates to a relay, comprising a packaging cavity and a valve assembly. An inner cavity is formed in the interior of the packaging cavity, and a cavity wall of the inner cavity has a pressure relief hole in communication with the inner cavity. The valve assembly comprises a valve plate having a rupturable portion and a connecting portion. The connecting portion is connected around the outer periphery of the rupturable portion, and is connected to the cavity wall of the inner cavity. The structural strength of the rupturable portion is less than the structural strength of the connecting portion. The rupturable portion is configured to rupture to open the pressure relief hole when the gas pressure in the inner cavity is greater than or equal to a threshold.

Description

relay

[0001] This disclosure claims priority to Chinese Patent Application No. 202410938813.9, filed on July 12, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of electronic control device technology, and more specifically, to a relay. Background Technology

[0003] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0004] During operation, when the short-circuit load is very large, the moving contact and stationary contact of the high-voltage DC relay may spring apart due to the electrodynamic repulsion generated by the short-circuit current, resulting in contact arcing. Because both the load short-circuit current and voltage are very high, the moving contact and stationary contact may instantly and violently arc, which could easily cause the relay to explode, posing a significant safety hazard. Summary of the Invention

[0005] This disclosure provides a relay to address the problem that relays in the related art are prone to explosion.

[0006] The relay of this disclosure embodiment includes:

[0007] An encapsulated cavity is formed inside, and the cavity wall has a pressure relief hole communicating with the cavity; and

[0008] A valve assembly includes a valve disc having a burst portion and a connecting portion, the connecting portion being connected around the outer periphery of the burst portion and to the cavity wall of the inner cavity, the structural strength of the burst portion being less than the structural strength of the connecting portion; the burst portion is configured to rupture to open the pressure relief orifice when the gas pressure in the inner cavity is greater than or equal to a threshold.

[0009] According to some embodiments of this disclosure, the valve assembly further includes an adapter ring, and the connecting portion is connected to the cavity wall of the inner cavity via the adapter ring.

[0010] According to some embodiments of this disclosure, one end of the adapter ring is connected to the surface of the connecting portion in the thickness direction, and the other end is connected to the cavity wall of the inner cavity.

[0011] According to some embodiments of this disclosure, the adapter ring includes a vertical section and an extension section, the extension section extending out of the outer peripheral surface of the vertical section;

[0012] One of the vertical segment and the extended segment is connected to the connecting part, and the other is connected to the cavity wall of the inner cavity.

[0013] According to some embodiments of this disclosure, the adapter ring further includes a curved section, and the vertical section is connected to the extension section through the curved section.

[0014] According to some embodiments of this disclosure, the vertical segment is perpendicular to the outer extension segment.

[0015] According to some embodiments of this disclosure, the adapter ring and the connecting part are made of different materials and are connected by welding.

[0016] The structural strength of the adapter ring is less than that of the connecting part.

[0017] According to some embodiments of this disclosure, the blasting part and the connecting part are either an integral structure or separate structures.

[0018] According to some embodiments of this disclosure, the valve plate includes a flat plate and a connecting ring in a split structure, the flat plate covering one side surface of the connecting ring in the thickness direction, and the outer peripheral surface of the connecting ring being flush with the outer peripheral edge of the flat plate;

[0019] The connecting ring and the portion of the flat plate connected to the connecting ring constitute the connecting part, and the remaining portion of the flat plate constitutes the blasting part.

[0020] According to some embodiments of this disclosure, the valve plate includes a flat plate with a split structure and two connecting rings. The two connecting rings are respectively connected to the two side surfaces of the flat plate in the thickness direction, and the outer peripheral surface of each connecting ring is flush with the outer peripheral edge of the flat plate.

[0021] The two connecting rings and the portion of the flat plate connected to the connecting rings constitute the connecting part, and the remaining portion of the flat plate constitutes the blasting part.

[0022] According to some embodiments of this disclosure, the connecting portion has a first surface and a second surface disposed opposite to each other in the thickness direction, and the explosive portion has a third surface and a fourth surface disposed opposite to each other in the thickness direction;

[0023] The third surface is flush with the first surface, the fourth surface is located within the space enclosed by the connecting portion, and the second surface is connected to the cavity wall of the inner cavity.

[0024] According to some embodiments of this disclosure, the connecting portion has a first surface and a second surface disposed opposite to each other in the thickness direction, and the explosive portion has a third surface and a fourth surface disposed opposite to each other in the thickness direction;

[0025] The third surface is lower than the first surface, and the fourth surface is lower than the second surface.

[0026] According to some embodiments of this disclosure, the valve assembly includes a plurality of stacked valve plates;

[0027] In two adjacent valve plates, the two adjacent connecting portions are connected, and the two adjacent bursting portions are arranged at intervals along the thickness direction of the valve plate.

[0028] According to some embodiments of this disclosure, a transition portion is formed at the connection position between the inner peripheral surface of the connecting portion and one side surface of the explosive portion in the thickness direction.

[0029] According to some embodiments of this disclosure, the transition portion is any of the following structures: a chamfer, an inner rounded corner, or a combination of a chamfer and an inner rounded corner.

[0030] According to some embodiments of this disclosure, the connecting part and the bursting part are separate structures, and are connected by welding or bonding.

[0031] The transition section is formed by the accumulation of solder or glue.

[0032] According to some embodiments of this disclosure, the cavity wall of the inner cavity has a plurality of pressure relief holes, and the relay includes a plurality of valve assemblies, the positions of the plurality of valve assemblies corresponding to the positions of the plurality of pressure relief holes, for closing the plurality of pressure relief holes.

[0033] According to some embodiments of this disclosure, the thickness of the burst portion in the plurality of valve assemblies is not equal.

[0034] According to some embodiments of this disclosure, the encapsulation cavity includes:

[0035] A yoke plate having a first through hole that penetrates the yoke plate along its thickness direction;

[0036] An insulating cover, connected to one side surface of the yoke plate in the thickness direction via a frame, forms a first chamber; and

[0037] A metal cover is attached to the other side surface of the yoke plate in the thickness direction to form a second chamber;

[0038] The first chamber and the second chamber are connected through the first perforation and form the inner cavity.

[0039] According to some embodiments of this disclosure, the yoke plate has the pressure relief hole, and the valve assembly is connected to the yoke plate.

[0040] According to some embodiments of this disclosure, one side surface of the yoke plate in the thickness direction has a recessed groove, and the pressure relief hole penetrates the bottom surface of the recessed groove;

[0041] At least a portion of the valve assembly is located within the sinkhole.

[0042] According to some embodiments of this disclosure, the insulating cover has the pressure relief hole, and the valve assembly is connected to the insulating cover.

[0043] According to some embodiments of this disclosure, the insulating cover includes:

[0044] Top wall; and

[0045] A sidewall is connected to the outer periphery of the top wall; the top wall and / or the sidewall has the pressure relief hole.

[0046] According to some embodiments of this disclosure, the frame has the pressure relief hole, and the valve assembly is connected to the frame.

[0047] According to some embodiments of this disclosure, the metal cover has the pressure relief hole, and the valve assembly is connected to the inner or outer wall surface of the metal cover.

[0048] According to some embodiments of this disclosure, the inner cavity is a completely sealed chamber.

[0049] According to some embodiments of this disclosure, the valve assembly is configured to close the pressure relief orifice when the gas pressure in the cavity is less than the threshold.

[0050] According to some embodiments of this disclosure, the structural strength of the bursting part is less than the structural strength of the encapsulation cavity.

[0051] According to some embodiments of this disclosure, the material of the bursting portion is different from the material of the encapsulation cavity; and / or, the thickness of the bursting portion is less than the thickness of the cavity wall of the inner cavity.

[0052] According to some embodiments of this disclosure, the blasting section is made of ceramic material.

[0053] According to some embodiments of this disclosure, the thickness of the blasting portion is less than the thickness of the connecting portion.

[0054] According to some embodiments of this disclosure, the connecting portion is welded to the encapsulation cavity.

[0055] An embodiment of the above application has at least the following advantages or beneficial effects:

[0056] In the relay of this embodiment, the connecting part is connected around the outer periphery of the bursting part, and the structural strength of the connecting part is greater than that of the bursting part. On the one hand, the structural strength of the bursting part is low, so it can be quickly ruptured by the gas in the inner cavity and the gas can be released in time. On the other hand, the structural strength of the connecting part is high, so when the connecting part is connected to the encapsulation cavity, the stress resistance of the connecting part is improved, thereby avoiding the bursting part from cracking due to the transmission of welding stress to the bursting part.

[0057] Furthermore, multiple valve plates are stacked and adjacent bursting sections are arranged at intervals. On the one hand, when the relay is in an abnormal working state, multiple bursting sections will burst and release pressure sequentially. On the other hand, when the relay is in a normal working state, the probability of multiple bursting sections bursting simultaneously is much lower than the probability of only one bursting section bursting. Therefore, the design of multiple bursting sections improves the sealing reliability of the encapsulation cavity under normal working conditions. Furthermore, the adjacent bursting sections are arranged at intervals, so the thickness of each bursting section will not increase, ensuring that the bursting section can burst and release pressure in time when the gas pressure in the inner cavity reaches the threshold.

[0058] Furthermore, the inner cavity wall is provided with multiple pressure relief holes, which can increase the discharge capacity and improve the relay's explosion resistance. In addition, while keeping the overall discharge capacity unchanged, the area of ​​each pressure relief hole can be set to be smaller, thus allowing for more flexible placement of each pressure relief hole.

[0059] Furthermore, the thickness of the bursting parts of multiple valve assemblies is not equal, so that the thinner bursting parts rupture first and the thicker bursting parts rupture later. This allows the high-pressure gas to be released sequentially and orderly into the cavity enclosed by the outer shell, avoiding the problem of the outer shell cracking due to the high-pressure gas being released into the outer shell from multiple pressure relief holes at the same time and the outer shell being unable to release the high-pressure gas in time. Attached Figure Description

[0060] Figure 1 shows an exploded view of a relay according to an embodiment of the present disclosure.

[0061] Figure 2 shows a cross-sectional view of the encapsulation cavity and the moving component.

[0062] Figure 3 shows a schematic diagram of a valve assembly according to a first embodiment of the present disclosure.

[0063] Figure 4 shows a cross-sectional view along section line AA in Figure 3.

[0064] Figure 5 shows a cross-sectional view of a valve assembly according to a second embodiment of this disclosure.

[0065] Figure 6 shows a cross-sectional view of a valve assembly according to a third embodiment of this disclosure.

[0066] Figure 7 shows a cross-sectional view of a valve assembly according to a fourth embodiment of this disclosure.

[0067] Figure 8 shows a cross-sectional view of a valve assembly according to a fifth embodiment of this disclosure.

[0068] Figure 9 shows a cross-sectional view of a valve assembly according to a sixth embodiment of this disclosure.

[0069] Figure 10 shows a cross-sectional view of a valve assembly according to a seventh embodiment of the present disclosure.

[0070] Figure 11 shows a cross-sectional view of a valve assembly according to an eighth embodiment of the present disclosure.

[0071] Figure 12 shows a cross-sectional view of a valve assembly according to a ninth embodiment of this disclosure.

[0072] Figure 13 shows a cross-sectional view of a valve assembly according to the tenth embodiment of this disclosure.

[0073] Figure 14 shows a cross-sectional view of a valve assembly according to the eleventh embodiment of this disclosure.

[0074] Figure 15 shows a cross-sectional view of a valve assembly according to the twelfth embodiment of this disclosure.

[0075] Figure 16 shows a cross-sectional view of a valve assembly according to the thirteenth embodiment of this disclosure.

[0076] Figure 17 shows a cross-sectional view of a valve assembly according to the fourteenth embodiment of this disclosure.

[0077] Figure 18 shows a cross-sectional view of a valve assembly according to the fifteenth embodiment of this disclosure.

[0078] Figure 19 shows a cross-sectional view of a valve assembly according to the sixteenth embodiment of this disclosure.

[0079] Figure 20 shows a cross-sectional view of the top wall of the insulating cover having a pressure relief hole, and the valve assembly being connected to the top wall.

[0080] Figure 21 shows a schematic diagram of an insulating cover with a pressure relief hole on its side wall and a valve assembly connected to the side wall.

[0081] Figure 22 shows another schematic diagram of an insulating cover with a pressure relief hole on its side wall and a valve assembly connected to the side wall.

[0082] Figure 23 shows a cross-sectional view of a frame plate with a pressure relief hole and a valve assembly connected to the frame plate.

[0083] Figure 24 shows a top view of the yoke plate with a pressure relief hole and the valve assembly connected to the yoke plate.

[0084] Figure 25 shows an exploded view of Figure 24.

[0085] Figure 26 shows a cross-sectional view along the BB section line in Figure 24.

[0086] Figure 27 shows a metal cover with a pressure relief hole, and a valve assembly connected to the inner surface of the metal cover.

[0087] Figure 28 shows a metal cover with a pressure relief hole, and a valve assembly connected to the outer surface of the metal cover.

[0088] Figures 29 to 32 show cross-sectional views of valve plates in four different embodiments connected to the top wall of an insulating cover via adapter rings.

[0089] Figure 33 shows a cross-sectional view of the valve plate connected to the yoke plate via an adapter ring.

[0090] Figure 34 shows a cross-sectional view of the valve plate connected to the metal cover via an adapter ring.

[0091] Figure 35 shows a schematic diagram of two valve assemblies connected to the top wall of the insulating cover.

[0092] Figure 36 shows a schematic diagram of two valve assemblies connected to the side wall of the insulating cover.

[0093] Figure 37 shows a cross-sectional view of two valve assemblies connected to a frame.

[0094] Figure 38 shows a cross-sectional view of two valve assemblies connected to a metal casing.

[0095] Figure 39 shows a top view of two valve assemblies connected to the yoke plate.

[0096] Figure 40 shows a cross-sectional view along the CC section line in Figure 39. Detailed Implementation

[0097] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0098] It is understood that the terms "comprising" and "having," and any variations thereof, used in the embodiments of this disclosure, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to such processes, methods, products, or apparatus.

[0099] As shown in Figures 1 and 2, the relay of this embodiment includes a housing 10, an insulating cover 21, a yoke plate 25, a pair of stationary contacts 22, an arc-extinguishing portion 26, a moving assembly 30, and a magnetic circuit portion 40. The insulating cover 21, the yoke plate 25, the pair of stationary contacts 22, the arc-extinguishing portion 26, the moving assembly 30, and the magnetic circuit portion 40 are disposed within the housing 10.

[0100] The outer casing 10 includes a first casing 11 and a second casing 12, which are connected to form a chamber for accommodating an insulating cover 21, a yoke plate 25, a pair of stationary contacts 22, an arc-extinguishing part 26, a moving assembly 30, and a magnetic circuit part 40.

[0101] It is understood that this disclosure does not particularly limit the shape of the first shell 11 and the second shell 12, as long as the first shell 11 and the second shell 12, when connected, can form a cavity for accommodating the insulating cover 21, the yoke plate 25, a pair of stationary contacts 22, the arc-extinguishing part 26, the moving assembly 30, and the magnetic circuit part 40. For example, in one embodiment, the first shell 11 is a cuboid shape with an opening, and the second shell 12 is plate-shaped, with the second shell 12 snapping into the opening of the first shell 11. The first shell 11 and the second shell 12 can be connected by a snap-fit ​​method, but this is not a limitation.

[0102] As shown in Figure 2, an insulating cover 21 is connected to a yoke plate 25 to form a first cavity 212. A pair of stationary contacts 22 are mounted on top of the insulating cover 21. At least a portion of each stationary contact 22 extends into the first cavity 212 formed by the insulating cover 21 and the yoke plate 25. Each stationary contact 22 also has a stationary contact point at its bottom, which can be integrally or separately disposed at the bottom of the stationary contact 22. One stationary contact 22 serves as the terminal for current inflow, and the other stationary contact 22 serves as the terminal for current outflow.

[0103] In this embodiment of the present disclosure, the top of the insulating cover 21 has two openings 211, each opening 211 communicating with the first cavity 212. A pair of stationary contacts 22 are respectively disposed in the two openings 211. Furthermore, each stationary contact 22 can be connected to the insulating cover 21 by welding, but is not limited thereto.

[0104] It is understood that the insulating cover 21 can be made of ceramic material, that is, the insulating cover 21 is a ceramic cover, but it is not limited thereto. For example, in other embodiments, the insulating cover 21 can also be made of plastic material.

[0105] In this embodiment, the insulating cover 21 is made of ceramic and is connected to the yoke plate 25 via a frame 24. The frame 24 can be a ring-shaped metal part, such as an iron-nickel alloy. One end of the frame 24 is connected to the edge of the opening of the insulating cover 21, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame 24 is connected to the yoke plate 25, also by laser welding, brazing, resistance welding, or adhesive bonding. The frame 24 is provided between the insulating cover 21 and the yoke plate 25 to facilitate their connection.

[0106] The insulating cover 21 includes a top wall 213 and a side wall 214. One end of the side wall 214 is connected to the outer periphery of the top wall 213, and the other end of the side wall 214 is connected to the frame 24.

[0107] The top wall 213 has two openings 211, and a pair of stationary contacts 22 are respectively inserted into the two openings 211. Each stationary contact 22 can be connected to the top wall 213 by welding, but is not limited to this.

[0108] Please refer to Figure 2. The moving assembly 30 includes a moving contact 31, a first elastic element 32, and a push rod member 33. The moving contact 31 is movable between a first position in contact with a pair of stationary contacts 22 and a second position away from the pair of stationary contacts 22. The push rod member 33 is used to drive the moving contact 31 to move.

[0109] For ease of explanation, the arrangement direction of a pair of stationary contacts 22 is defined as the first direction D1, and the movement direction of the moving component 30 is defined as the second direction D2, wherein the first direction D1 is perpendicular to the second direction D2. The direction perpendicular to the first direction D1 and the second direction D2 is defined as the third direction D3.

[0110] The push rod member 33 is movably inserted through the first through hole 251 of the yoke plate 25, and part of the push rod member 33 extends out of the side surface of the yoke plate 25 facing the stationary contact 22, and part of the push rod member 33 extends out of the side surface of the yoke plate 25 away from the stationary contact 22.

[0111] The movable contact 31 is movably mounted on the portion of the push rod member 33 that extends from the side surface of the yoke plate 25 toward the stationary contact 22. The first elastic member 32 is connected to the push rod member 33 and the movable contact 31 and is used to apply an elastic force to the movable contact 31 toward the stationary contact 22 to provide contact pressure.

[0112] As an example, the first elastic element 32 is a spring or a leaf spring, but is not limited thereto. In addition, the number of the first elastic elements 32 can be one or more. When the number of the first elastic elements 32 is multiple, all of the multiple first elastic elements 32 can be springs, or all of them can be leaf springs, or they can be a combination of leaf springs and springs. This disclosure does not particularly limit this.

[0113] A metal cover 27 is also provided on the side of the yoke plate 25 facing away from the stationary contact 22. The metal cover 27 covers the first through hole 251 of the yoke plate 25, and the metal cover 27 and the yoke plate 25 form a second chamber 271. The second chamber 271 is connected to the first chamber 212 through the first through hole 251. The portion of the push rod member 33 extending from the side of the yoke plate 25 facing away from the stationary contact 22 is inserted into the metal cover 27.

[0114] Please refer to Figures 1 and 2. The magnetic circuit section 40 includes a moving iron core 41, a stationary iron core 42, a coil frame 43, and a coil 44. The coil frame 43 is a hollow cylindrical shape and is made of insulating material. The coil frame 43 is located on the side of the yoke plate 25 facing away from the stationary contact 22 and surrounds the outer periphery of the metal cover 27. The coil 44 is wound around the outer periphery of the coil frame 43.

[0115] The stationary iron core 42 is fixedly disposed within the metal cover 27, with a portion of the stationary iron core 42 inserted into the first through hole 251. The stationary iron core 42 has a second through hole 421, which corresponds in position to the first through hole 251, allowing the push rod member 33 to be movably inserted into both the first through hole 251 and the second through hole 421. The moving iron core 41 is movably disposed within the metal cover 27 and is positioned opposite the stationary iron core 42 in the second direction D2. The moving iron core 41 is connected to the push rod member 33 and is attracted by the stationary iron core 42 when the coil 44 is energized. The moving iron core 41 and the push rod member 33 can be connected by screwing, riveting, welding, or other methods.

[0116] As shown in Figure 2, the magnetic circuit part 40 also includes a second elastic element 46, which is located inside the metal cover 27 and is disposed between the stationary iron core 42 and the moving iron core 41. It is used to reset the moving iron core 41 when the coil 44 is de-energized.

[0117] In one embodiment, the second elastic element 46 is a spring and is sleeved on the outer periphery of the push rod member 33, but is not limited thereto.

[0118] It should be noted that when the coil 44 is energized, the stationary iron core 42 attracts the moving iron core 41 to move upward, and the moving iron core 41 can drive the push rod component 33 to move upward. When the moving contact 31 contacts the stationary contact 22, the moving contact 31 is stopped by the stationary contact 22, while the push rod component 33 will continue to move upward until it has completed its overtravel.

[0119] During the overtravel process, the first elastic element 32, after being squeezed by the push rod member 33, can provide elastic force to the moving contact piece 31 to provide contact pressure.

[0120] As shown in Figure 1, the arc-extinguishing part 26 includes a permanent magnet 262, which is disposed on the outer surface of the insulating cover 21. By setting the permanent magnet 262 on the outer periphery of the insulating cover 21, a magnetic field can be formed around the stationary contact 22 and the moving contact 31. Therefore, under the action of the magnetic field, the electric arc generated between the stationary contacts 22 will be elongated in a direction away from each other, thus extinguishing the arc.

[0121] The arc-extinguishing section 26 also includes a yoke clamp 261, with a permanent magnet 262 disposed between the side surface of the yoke clamp 261 facing the insulating cover 21 and the outer peripheral surface of the insulating cover 21. The design of the yoke clamp 261 surrounding the permanent magnet 262 prevents the magnetic field generated by the permanent magnet 262 from spreading outwards and affecting the arc-extinguishing effect.

[0122] In one embodiment, the yoke clip 261 is made of a soft magnetic material, which may include, but is not limited to, iron, cobalt, nickel, and their alloys.

[0123] It is understood that the number of yoke clips 261 can be one or two. When there is one yoke clip 261, the yoke clip 261 forms a ring structure and surrounds the outer periphery of the insulating cover 21. When there are two yoke clips 261, each yoke clip 261 can be U-shaped and arranged opposite each other along the first direction D1, with the two yoke clips 261 respectively surrounding the two ends of the insulating cover 21 along the first direction D1.

[0124] As shown in Figures 2 to 4, the relay of this embodiment includes an encapsulation cavity 20 and a valve assembly 60. The encapsulation cavity 20 includes an insulating cover 21, a frame 24, a yoke plate 25, and a metal cover 27, for encapsulating components such as the moving assembly 30, the stationary iron core 42, the moving iron core 41, and the second elastic element 46. An inner cavity 20a is formed inside the encapsulation cavity 20, including a first cavity 212 and a second cavity 271. The cavity wall of the inner cavity 20a has a pressure relief hole 28 communicating with the inner cavity 20a.

[0125] It is understood that, in one embodiment, the inner cavity 20a is a completely sealed chamber (i.e., the interior of the encapsulated cavity 20 is not in communication with the external space); in another embodiment, the inner cavity 20a may not be a completely sealed chamber.

[0126] As shown in Figures 3 and 4, the valve assembly 60 includes a valve plate 61 having a burst portion 611 and a connecting portion 612. The connecting portion 612 is connected to the outer periphery of the burst portion 611 and to the cavity wall of the inner cavity 20a. The structural strength of the burst portion 611 is less than the structural strength of the connecting portion 612. The valve assembly 60 is configured to close the pressure relief port 28 when the gas pressure in the inner cavity 20a is less than a threshold value, and to rupture the burst portion 611 to open the pressure relief port 28 when the gas pressure in the inner cavity 20a is greater than or equal to the threshold value.

[0127] Understandably, when the relay is in normal operating condition, the gas pressure in the inner cavity 20a is less than the threshold. At this time, the bursting part 611 is not ruptured by the gas pressure in the inner cavity 20a, and the valve assembly 60 remains closed to the pressure relief port 28. When the relay is in abnormal operating condition, the gas pressure in the inner cavity 20a is greater than or equal to the threshold. At this time, the bursting part 611 is ruptured by the gas pressure in the inner cavity 20a, and the gas pressure in the inner cavity 20a can be released into the outer casing 10 through the pressure relief port 28, and ultimately released to the outside of the outer casing 10.

[0128] In other words, under abnormal operating conditions, as the gas pressure inside the inner cavity 20a gradually increases, the gas pressure will first break through the burst section 611, causing the rapidly rising gas pressure to be released through the pressure relief hole 28. This prevents the gas pressure inside the inner cavity 20a from continuing to rise and thus avoids reaching the structural strength of the encapsulation cavity 20, preventing the encapsulation cavity 20 from exploding. Under normal operating conditions, the gas pressure inside the inner cavity 20a will not break through the burst section 611, and the valve assembly 60 can still function to seal the pressure relief hole 28.

[0129] It can be seen that the ultimate structural strength of the bursting part 611 is greater than the upper limit of the structural strength of the encapsulation cavity 20 when it is working normally, but less than the ultimate structural strength of the encapsulation cavity 20.

[0130] It is understandable that the term "normal operating condition" refers to the relay operating at its rated current, while the term "abnormal operating condition" refers to the moment when the moving contact 31 and the stationary contact 22 are subjected to a high-current short circuit, or an overload trip, etc. Furthermore, the pressure represented by the term "threshold" is slightly greater than the gas pressure within the internal cavity 20a of the relay under normal operating conditions. The threshold may be adjusted depending on the relay model, but it cannot exceed the structural strength of the internal cavity 20a.

[0131] In other words, when the relay is in normal working condition, the pressure inside the inner cavity 20a will not reach the threshold, and the bursting part 611 will not be ruptured. When the relay is in abnormal working condition, the pressure inside the inner cavity 20a is greater than or equal to the threshold, and the bursting part 611 can be ruptured by the gas.

[0132] Understandably, when valve assembly 60 closes the pressure relief hole 28, it can maintain the sealing of the inner cavity 20a and ensure the normal operation of the relay.

[0133] In one embodiment, the structural strength of the bursting part 611 is less than that of the encapsulation cavity 20. Thus, when the relay is in an abnormal operating state and the gas pressure inside the encapsulation cavity 20 gradually increases, the bursting part 611 will burst before the encapsulation cavity 20, thereby achieving the purpose of pressure relief.

[0134] The structural strength of the bursting part 611 being less than that of the encapsulation cavity 20 can be achieved by using different materials and / or different structures for the two. For example, in one embodiment, when the bursting part 611 and the encapsulation cavity 20 are made of the same material, the thickness of the bursting part 611 can be designed to be thinner and less than the wall thickness of the encapsulation cavity 20; in another embodiment, when the wall thickness of the bursting part 611 and the encapsulation cavity 20 is the same, the bursting part 611 can be made of ceramic material, while the encapsulation cavity 20 can be made of metal material. Of course, other suitable combinations can also be used to make the structural strength of the bursting part 611 less than that of the encapsulation cavity 20, which will not be listed here.

[0135] In this embodiment of the valve plate 61, the connecting portion 612 is connected around the outer periphery of the burst portion 611, and the structural strength of the connecting portion 612 is greater than that of the burst portion 611. On the one hand, the structural strength of the burst portion 611 is lower, so it can be quickly ruptured by the gas in the inner cavity 20a and the gas can be released in time. On the other hand, the structural strength of the connecting portion 612 is higher, so when the connecting portion 612 is connected to the encapsulation cavity 20, the stress-bearing capacity of the connecting portion 612 is improved, thereby avoiding the burst portion 611 from rupturing due to the transmission of welding stress to the burst portion 611.

[0136] As shown in Figures 3 and 4, the valve plate 61 has a sheet-like structure. For example, the valve plate 61 can be a circular sheet-like structure, a rectangular sheet-like structure, an oval sheet-like structure, an elliptical sheet-like structure, etc. The thickness t1 of the explosive portion 611 is less than the thickness t2 of the connecting portion 612. In other words, in this embodiment of the present disclosure, by controlling the thickness of the explosive portion 611 to be less than the thickness of the connecting portion 612, the structural strength of the explosive portion 611 is made less than the structural strength of the connecting portion 612.

[0137] Of course, in other embodiments, the materials of the blasting part 611 and the connecting part 612 can be designed to be different to achieve different structural strengths. For example, the blasting part 611 can be made of ceramic material and the connecting part 612 can be made of metal material.

[0138] As shown in Figure 4, in one embodiment, the connecting part 612 and the bursting part 611 are an integral structure. The valve plate 61 can be made of materials such as ceramics or glass. Ceramic and glass materials are more brittle, making it easier for the bursting part 611 to be ruptured by gas, thereby releasing the gas in a timely manner.

[0139] Of course, in other embodiments, the connecting part 612 and the bursting part 611 may also be separate structures.

[0140] The connecting portion 612 has a first surface 6121 and a second surface 6122 arranged opposite to each other in the thickness direction, and the explosive portion 611 has a third surface 6111 and a fourth surface 6112 arranged opposite to each other in the thickness direction; the third surface 6111 is flush with the first surface 6121, the fourth surface 6112 is located within the space enclosed by the connecting portion 612, and the second surface 6122 is connected to the cavity wall of the inner cavity 20a.

[0141] In one embodiment, the connecting portion 612 is welded to the encapsulation cavity 20.

[0142] As shown in Figure 5, the similarities between the second embodiment and the first embodiment of this disclosure will not be repeated here. The differences are as follows:

[0143] A transition portion 615 is formed at the connection position between the inner peripheral surface of the connecting portion 612 and one side surface (fourth surface 6112) of the explosive portion 611 in the thickness direction.

[0144] It is understandable that by providing a transition portion 615 at the connection position between the connecting portion 612 and the rupture portion 611, the effect of stress concentration can be further reduced, and the rupture portion 611 can be prevented from cracking.

[0145] In one embodiment, the transition portion 615 is chamfered.

[0146] As shown in Figure 6, the similarities between the third embodiment and the second embodiment of this disclosure will not be repeated here. The difference is that the transition portion 615 is an inner arc angle.

[0147] Of course, in other embodiments, the transition portion 615 may also be a combination of a chamfer and an inner rounded corner.

[0148] As shown in Figure 7, the similarities between the fourth embodiment and the first embodiment of this disclosure will not be repeated here, but the differences are as follows:

[0149] The connecting part 612 and the explosive part 611 are separate structures. In one embodiment, the connecting part 612 and the explosive part 611 can be connected by welding, bonding or other methods, and this disclosure does not limit this.

[0150] The connecting part 612 and the explosive part 611 can be made of the same material or different materials.

[0151] It is understood that the valve plate 61 in the fourth embodiment may also be provided with a transition portion 615, which will not be described in detail here.

[0152] As shown in Figure 8, the similarities between the fifth embodiment and the first embodiment of this disclosure will not be repeated here, but the differences are as follows:

[0153] The valve plate 61 includes a flat plate 613 and a connecting ring 614, which are separate structures. The flat plate 613 covers one side surface of the connecting ring 614 in the thickness direction, and the outer peripheral surface of the connecting ring 614 is flush with the outer peripheral edge of the flat plate 613. By designing the outer peripheral surface of the connecting ring 614 to be flush with the outer peripheral edge of the flat plate 613, the valve plate 61 can be subjected to more uniform force.

[0154] Of course, in other embodiments, the outer peripheral surface of the connecting ring 614 may not be flush with the outer peripheral edge of the flat plate 613.

[0155] The flat sheet 613 includes a middle portion 6131 and an edge portion 6132, which are integrally formed. The edge portion 6132 is annular and surrounds the outer periphery of the middle portion 6131. ​​The edge portion 6132 is stacked with a connecting ring 614.

[0156] The connecting ring 614 and the edge portion 6132 constitute the connecting portion 612, and the middle portion 6131 constitutes the bursting portion 611. That is, in this embodiment of the present disclosure, the thickness of the connecting portion 612 is equal to the sum of the thicknesses of the connecting ring 614 and the edge portion 6132.

[0157] It is understandable that the flat plate 613 and the connecting ring 614 can be made of the same material or different materials.

[0158] Furthermore, the thickness of the connecting ring 614 can be greater than or less than the thickness of the flat plate 613. When the thickness of the connecting ring 614 is less than the thickness of the flat plate 613, since the sum of the thicknesses of the connecting ring 614 and the edge portion 6132 is greater than the thickness of the middle portion 6131, the requirement that the thickness of the connecting portion 612 of the valve plate 61 is greater than the thickness of the burst portion 611 is still satisfied.

[0159] As shown in Figure 9, the similarities between the sixth embodiment and the fifth embodiment of this disclosure will not be repeated here, but the differences are as follows:

[0160] The connection position between the inner circumferential surface of the connecting ring 614 and the side surface (fourth surface 6112) of the flat plate 613 facing the connecting ring 614 forms a transition portion 615.

[0161] Understandably, by setting the transition section 615, the impact of stress concentration can be further reduced, and the bursting section 611 can be prevented from cracking.

[0162] In one embodiment, the transition portion 615 is chamfered.

[0163] It should be noted that since the flat plate 613 and the connecting ring 614 are separate structures, the flat plate 613 and the connecting ring 614 can be connected by welding or glue. Therefore, the transition part 615 can be formed by the accumulation of solder or glue.

[0164] As shown in Figure 10, the similarities between the seventh embodiment and the sixth embodiment of this disclosure will not be repeated here. The difference is that the transition portion 615 is an inner arc angle.

[0165] Of course, in other embodiments, the transition portion 615 may also be a combination of a chamfer and an inner rounded corner.

[0166] As shown in Figure 11, the similarities between the eighth embodiment and the fifth embodiment of this disclosure will not be repeated here, but the differences are as follows:

[0167] The valve plate 61 includes a flat plate 613 with a split structure and two connecting rings 614. The two connecting rings 614 are respectively connected to the two side surfaces of the flat plate 613 in the thickness direction, and the outer peripheral surface of each connecting ring 614 is flush with the outer peripheral edge of the flat plate 613. By designing the outer peripheral surface of each connecting ring 614 to be flush with the outer peripheral edge of the flat plate 613, the valve plate 61 can be subjected to more uniform force.

[0168] Of course, in other embodiments, the outer peripheral surface of the connecting ring 614 may not be flush with the outer peripheral edge of the flat plate 613.

[0169] The flat plate 613 includes a middle portion 6131 and an edge portion 6132, which are integrally formed. The edge portion 6132 is annular and surrounds the outer periphery of the middle portion 6131. ​​The edge portion 6132 is sandwiched between two connecting rings 614.

[0170] Two connecting rings 614 and an edge portion 6132 constitute a connecting portion 612, and a middle portion 6131 constitutes a bursting portion 611. That is, in this embodiment of the present disclosure, the thickness of the connecting portion 612 is equal to the sum of the thicknesses of the two connecting rings 614 and the edge portion 6132.

[0171] It is understood that the valve plate 61 of the eighth embodiment may also be provided with a transition portion 615, and the transition portion 615 may be formed by solder or glue buildup, which will not be described in detail here.

[0172] As shown in Figure 12, the similarities between the ninth embodiment and the first embodiment of this disclosure will not be repeated here, but the differences are as follows:

[0173] The third surface 6111 is lower than the first surface 6121, and the fourth surface 6112 is lower than the second surface 6122.

[0174] It is understood that the valve plate 61 in the ninth embodiment may also be provided with a transition portion 615, which will not be described in detail here.

[0175] As shown in Figure 13, the similarities between the tenth embodiment and the third embodiment of this disclosure will not be repeated here, but the differences are as follows:

[0176] A chamfer 616 is formed at the junction of the first surface 6121 of the connecting portion 612 and the outer peripheral surface of the connecting portion 612; and / or, a chamfer 616 is formed at the junction of the second surface 6122 of the connecting portion 612 and the outer peripheral surface of the connecting portion 612; and / or, a chamfer 616 is formed at the junction of the inner peripheral surface of the connecting portion 612 and the second surface 6122 of the connecting portion 612.

[0177] It is understandable that by setting a chamfer 616 at the connection point, burrs at the sharp corners of the valve plate 61 can be removed, thus facilitating the assembly of the valve plate 61.

[0178] As shown in Figure 14, the similarities between the eleventh embodiment and the first embodiment will not be repeated here, but the differences are as follows:

[0179] The valve assembly 60 includes a plurality of stacked valve plates 61, each valve plate 61 being the valve plate 61 of the first embodiment. In two adjacent valve plates 61, two adjacent connecting portions 612 are connected, and two adjacent bursting portions 611 are spaced apart along the thickness direction of the valve plate 61. The adjacent connecting portions 612 can be connected by welding, adhesive bonding, or other methods, and this disclosure does not impose any particular limitation on this method.

[0180] In this embodiment of the present disclosure, multiple valve plates 61 are stacked and adjacent bursting parts 611 are arranged at intervals. On the one hand, when the relay is in an abnormal working state, multiple bursting parts 611 burst and release pressure in sequence; on the other hand, when the relay is in a normal working state, the probability of multiple bursting parts 611 bursting simultaneously is much less than the probability of only one bursting part 611 bursting. Therefore, the design of multiple bursting parts 611 improves the sealing reliability of the encapsulation cavity 20 in a normal working state.

[0181] As shown in Figure 15, the similarities between the twelfth and eleventh embodiments of this disclosure will not be repeated here, but the differences are as follows:

[0182] Each valve plate 61 is the valve plate 61 of the fifth embodiment.

[0183] As shown in Figure 16, the similarities between the thirteenth and eleventh embodiments of this disclosure will not be repeated here, but the differences are as follows:

[0184] Each valve plate 61 is the valve plate 61 of the fourth embodiment.

[0185] As shown in Figure 17, the similarities between the fourteenth and eleventh embodiments of this disclosure will not be repeated here, but the differences are as follows:

[0186] Each valve plate 61 is the valve plate 61 of the ninth embodiment.

[0187] As shown in Figure 18, the similarities between the fifteenth and eleventh embodiments of this disclosure will not be repeated here, but the differences are as follows:

[0188] Each valve plate 61 is the valve plate 61 of the eighth embodiment.

[0189] As shown in Figure 19, the similarities between the sixteenth and eleventh embodiments of this disclosure will not be repeated here, but the differences are as follows:

[0190] The valve assembly 60 includes two valve plates 61, one of which is the valve plate 61 of the first embodiment and the other valve plate 61 of the fifth embodiment.

[0191] It is understood that when the valve assembly 60 includes multiple valve plates 61, each valve plate 61 can be selected from any one of the first to tenth embodiments, which will not be listed here.

[0192] It is understood that any one of the insulating cover 21, frame plate 24, yoke plate 25, and metal cover 27 may be provided with at least one pressure relief hole 28. The following description, with reference to the accompanying drawings, explains the provision of pressure relief holes 28 in the insulating cover 21, frame plate 24, yoke plate 25, and metal cover 27.

[0193] As shown in Figure 20, a pressure relief hole 28 is provided on the top wall 213 of the insulating cover 21, and the pressure relief hole 28 penetrates the top wall 213 along the thickness direction. The valve assembly 60 is connected to the outer wall surface of the top wall 213 to seal the pressure relief hole 28.

[0194] It is understood that, in the embodiments of this disclosure, the valve assembly 60 may include the valve plate 61 of any of the above embodiments.

[0195] As shown in Figures 21 and 22, in a modified embodiment, the pressure relief hole 28 can be provided on the side wall 214 of the insulating cover 21. The valve assembly 60 is connected to the outer wall surface of the side wall 214.

[0196] In one embodiment, the sidewall 214 may include two first sidewalls 2141 and two second sidewalls 2142. The two first sidewalls 2141 are arranged opposite each other along a first direction D1, and the two second sidewalls 2142 are arranged opposite each other along a third direction D3. The two first sidewalls 2141 and the two second sidewalls 2142 are connected end to end to form a ring structure.

[0197] The first sidewall 2141 and / or the second sidewall 2142 may be provided with pressure relief holes 28.

[0198] It is understood that, in the embodiments of this disclosure, valve assembly 60 may include valve plate 61 of any of the above embodiments.

[0199] As shown in Figure 23, in a modified embodiment, the pressure relief hole 28 can be disposed on the frame piece 24, and the valve assembly 60 is connected to the frame piece 24. It is understood that, in the embodiments of this disclosure, the valve assembly 60 may include the valve piece 61 of any of the above embodiments.

[0200] As shown in Figures 24 to 26, in a modified embodiment, the pressure relief hole 28 can be provided on the yoke plate 25, and the pressure relief hole 28 penetrates the yoke plate 25 along its thickness direction. The valve assembly 60 is connected to the yoke plate 25.

[0201] Furthermore, one side surface of the yoke plate 25 in the thickness direction has a recessed groove 29, and a pressure relief hole 28 penetrates the bottom surface of the recessed groove 29; at least a portion of the valve assembly 60 is located within the recessed groove 29.

[0202] It is understood that, in the embodiments of this disclosure, valve assembly 60 may include valve plate 61 of any of the above embodiments.

[0203] As shown in Figure 27, as a modified embodiment, the bottom plate of the metal cover 27 may be provided with a pressure relief hole 28, and the valve assembly 60 is connected to the inner surface of the metal cover 27. It is understood that, in this embodiment, the valve assembly 60 may include the valve plate 61 of any of the above embodiments.

[0204] As shown in FIG28, as a modified embodiment, the valve assembly 60 may also be connected to the outer surface of the metal cover 27. It is understood that, in embodiments of this disclosure, the valve assembly 60 may include the valve plate 61 of any of the above embodiments.

[0205] As shown in Figure 29, the valve assembly 60 also includes an adapter ring 62, and the connecting part 612 is connected to the outer wall surface of the top wall 213 through the adapter ring 62. It can be understood that the adapter ring 62 and the insulating cover 21, and the connecting part 612 of the valve plate 61, can be connected by laser welding, brazing, resistance welding, adhesive bonding, etc.

[0206] In this embodiment of the present disclosure, the adapter ring 62 is sheet-shaped, one side surface of the adapter ring 62 in the thickness direction is connected to the outer wall surface of the top wall 213, and the other side surface of the adapter ring 62 in the thickness direction is connected to one side surface of the connecting portion 612 in the thickness direction.

[0207] The adapter ring 62 and the connecting part 612 can be made of the same material or different materials. When the adapter ring 62 and the connecting part 612 are made of different materials and are connected by welding, the structural strength of the adapter ring 62 is less than that of the connecting part 612. By designing the structural strength of the adapter ring 62 to be less than that of the connecting part 612, the rupture of the bursting part 611 due to the transmission of welding stress to the valve plate 61 can be avoided.

[0208] In one embodiment, the adapter ring 62 is made of a metal material and the connecting part 612 is made of a ceramic material, but this is not a limitation.

[0209] It is understood that, in the embodiments of this disclosure, valve assembly 60 may include valve plate 61 of any of the above embodiments.

[0210] As shown in Figure 30, in a modified embodiment, the adapter ring 62 includes a vertical section 621, an extension section 622, and a curved section 623. The vertical section 621 is connected to the extension section 622 through the curved section 623, and the extension section 622 extends out of the outer peripheral surface of the vertical section 621. The vertical section 621 is perpendicular to the extension section 622.

[0211] The vertical section 621 is connected to one side surface of the connecting part 612 in the thickness direction, and the outer extension section 622 is connected to the outer wall surface of the top wall 213.

[0212] It is understood that, in the embodiments of this disclosure, valve assembly 60 may include valve plate 61 of any of the above embodiments.

[0213] As shown in Figure 31, in a modified embodiment, the extension segment 622 is connected to one side surface of the connecting portion 612 in the thickness direction, and the vertical segment 621 is connected to the outer wall surface of the top wall 213.

[0214] It is understood that, in the embodiments of this disclosure, valve assembly 60 may include valve plate 61 of any of the above embodiments.

[0215] As shown in Figure 32, in a modified embodiment, the adapter ring 62 is cylindrical, with one end connected to one side surface of the connecting part 612 in the thickness direction, and the other end connected to the outer wall surface of the top wall 213.

[0216] As shown in Figure 33, as a modified embodiment, the valve plate 61 can also be connected to the yoke plate 25 via the adapter ring 62. The valve plate 61 can be any of the valve plate 61 described in the above embodiments, and the adapter ring 62 can be any of the adapter rings described in the above embodiments.

[0217] As shown in Figure 34, as a modified embodiment, the valve plate 61 can also be connected to the metal cover 27 via the adapter ring 62. The valve plate 61 and the adapter ring 62 can be located on either the inner surface or the outer surface of the metal cover 27. Furthermore, the valve plate 61 can be any of the valve plate 61 described in the above embodiments, and the adapter ring 62 can be any of the adapter rings described in the above embodiments.

[0218] As shown in Figure 35, the cavity wall of the inner cavity 20a has multiple pressure relief holes 28, and the relay includes multiple valve assemblies 60. The positions of the multiple valve assemblies 60 correspond to the positions of the multiple pressure relief holes 28, and are used to close the multiple pressure relief holes 28.

[0219] In this embodiment, the cavity wall of the inner cavity 20a is provided with multiple pressure relief holes 28, which increases the discharge capacity to quickly expel high-pressure gas. Furthermore, since there are multiple pressure relief holes 28, the area of ​​each pressure relief hole 28 can be set to be smaller while maintaining the overall discharge capacity, thus allowing for more flexible placement of each pressure relief hole 28. For example, some pressure relief holes 28 can be located on the insulating cover 21, while others can be located on the yoke plate 25, etc.

[0220] Please refer to Figure 35. Multiple pressure relief holes 28 can be opened on the top wall 213 of the insulating cover 21.

[0221] As shown in Figure 36, as a modified embodiment, the multiple pressure relief holes 28 can all be formed on the sidewalls 214 of the insulating cover 21. For example, the number of pressure relief holes 28 is two. In one embodiment, the two pressure relief holes 28 are respectively formed on the two first sidewalls 2141; in another embodiment, the two pressure relief holes 28 are respectively formed on the two second sidewalls 2142; in yet another embodiment, one pressure relief hole 28 is formed on one first sidewall 2141 and the other pressure relief hole 28 is formed on one second sidewall 2142.

[0222] As shown in Figure 37, as a modified embodiment, multiple pressure relief holes 28 can be opened on the frame piece 24.

[0223] As shown in Figure 38, in a modified embodiment, multiple pressure relief holes 28 can all be formed on the bottom plate of the metal cover 27. The valve assembly 60 can be located on either the inner surface or the outer surface of the metal cover 27.

[0224] As shown in Figures 39 and 40, in a modified embodiment, multiple pressure relief holes 28 can be formed on the yoke plate 25.

[0225] It is understandable that, as shown in Figure 40, in an embodiment where multiple pressure relief holes 28 are provided in the cavity wall of the inner cavity 20a, the thickness of the bursting part 611 in the multiple valve assemblies 60 is not equal.

[0226] In this embodiment of the present disclosure, the thickness of the bursting portion 611 of the multiple valve assemblies 60 is not equal, so that the thinner bursting portion 611 breaks first and the thicker bursting portion 611 breaks later. This allows the high-pressure gas to be released sequentially and orderly into the cavity enclosed by the outer shell 10, avoiding the problem of the outer shell 10 cracking due to multiple pressure relief holes 28 releasing gas into the outer shell 10 in a concentrated manner and the outer shell 10 being unable to release the gas in time.

[0227] The unequal thickness of the bursting portion 611 in the multiple valve assemblies 60 should be understood as follows: the thickness of the bursting portion 611 in the multiple valve assemblies 60 is not equal; or, among the bursting portions 611 in the multiple valve assemblies 60, at least one bursting portion 611 has a thickness that is not equal to the thickness of the other bursting portions 611. For example, taking the bursting portions 611 of three valve assemblies 60 as an example, the thickness of the bursting portion 611 of one valve assembly 60 is less than the thickness of the bursting portions 611 of the other two valve assemblies 60, and the thickness of the bursting portions 611 of the other two valve assemblies 60 is equal.

[0228] It should be noted that in the embodiment where the encapsulation cavity 20 is connected to multiple valve assemblies 60, the valve plate 61 included in the valve assembly 60 can be the valve plate 61 of any of the above embodiments.

[0229] In addition, the valve plate 61 can be directly connected to the encapsulation cavity 20, for example, the valve plate 61 can be directly connected to the insulating cover 21, the valve plate 61 can be directly connected to the yoke plate 25, the valve plate 61 can be directly connected to the metal cover 27, etc.

[0230] Of course, the valve plate 61 can also be connected to the encapsulation cavity 20 via the adapter ring 62. The adapter ring 62 can be the shape of any of the above embodiments, which will not be described in detail here.

[0231] In summary, the relays of the present disclosure embodiments have at least the following advantages and beneficial effects:

[0232] In the relay of this embodiment, the connecting portion 612 is connected around the outer periphery of the burst portion 611, and the thickness of the connecting portion 612 is greater than the thickness of the burst portion 611. On the one hand, the thinner burst portion 611 has lower structural strength and can be quickly ruptured by the gas in the inner cavity 20a to release the gas in time; on the other hand, the thicker connecting portion 612 has higher structural strength, and when the connecting portion 612 is connected to the encapsulation cavity 20, the stress-bearing capacity of the connecting portion 612 is improved, thereby preventing the burst portion 611 from rupturing due to the transmission of welding stress to the burst portion 611.

[0233] Furthermore, multiple valve plates 61 are stacked, and adjacent bursting sections 611 are arranged at intervals. On the one hand, when the relay is in an abnormal working state, multiple bursting sections 611 will burst and release pressure in sequence; on the other hand, when the relay is in a normal working state, the probability of multiple bursting sections 611 bursting simultaneously is much lower than the probability of only one bursting section 611 bursting. Therefore, the design of multiple bursting sections 611 improves the sealing reliability of the encapsulation cavity 20 in a normal working state. Furthermore, the adjacent bursting sections 611 are arranged at intervals, so the thickness of each bursting section 611 will not increase, ensuring that the bursting section 611 can burst and release pressure in time when the gas pressure in the inner cavity 20a reaches the threshold.

[0234] Furthermore, the cavity wall of the inner cavity 20a is provided with multiple pressure relief holes 28, which can increase the discharge capacity and improve the explosion resistance of the relay. In addition, under the premise of keeping the overall discharge capacity unchanged, the area of ​​each pressure relief hole 28 can be set to be smaller, thus making the placement of each pressure relief hole 28 more flexible.

[0235] Furthermore, the thickness of the bursting parts 611 of the multiple valve assemblies 60 is not equal, so that the thinner bursting parts 611 rupture first and the thicker bursting parts 611 rupture later. This allows the high-pressure gas to be released sequentially and orderly into the cavity enclosed by the outer shell 10, avoiding the problem of the outer shell 10 cracking due to the high-pressure gas being released into the outer shell 10 at the same time from multiple pressure relief holes 28 and the outer shell 10 being unable to release the high-pressure gas in time.

[0236] It is understood that the various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions, and will not be described in detail here.

[0237] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0238] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0239] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0240] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay, characterized in that, include: The encapsulated cavity has an internal cavity, and the cavity wall has a pressure relief hole communicating with the internal cavity; as well as A valve assembly includes a valve disc having a burst portion and a connecting portion, the connecting portion being connected around the outer periphery of the burst portion and to the cavity wall of the inner cavity, the structural strength of the burst portion being less than the structural strength of the connecting portion; the burst portion is configured to rupture to open the pressure relief orifice when the gas pressure in the inner cavity is greater than or equal to a threshold.

2. The relay according to claim 1, characterized in that, The valve assembly further includes an adapter ring, through which the connecting part is connected to the cavity wall of the inner cavity.

3. The relay according to claim 2, characterized in that, One end of the adapter ring is connected to the surface of the connecting part in the thickness direction, and the other end is connected to the cavity wall of the inner cavity.

4. The relay according to claim 3, characterized in that, The adapter ring includes a vertical section and an extension section, the extension section extending out of the outer peripheral surface of the vertical section; One of the vertical segment and the extended segment is connected to the connecting part, and the other is connected to the cavity wall of the inner cavity.

5. The relay according to claim 4, characterized in that, The adapter ring also includes a curved section, and the vertical section is connected to the extension section through the curved section.

6. The relay according to claim 4, characterized in that, The vertical segment is perpendicular to the outer extension segment.

7. The relay according to claim 2, characterized in that, The adapter ring and the connecting part are made of different materials and are connected by welding. The structural strength of the adapter ring is less than that of the connecting part.

8. The relay according to any one of claims 1 to 7, characterized in that, The blasting part and the connecting part are either an integral structure or separate structures.

9. The relay according to any one of claims 1 to 7, characterized in that, The valve plate includes a flat plate and a connecting ring in a split structure. The flat plate covers one side surface of the connecting ring in the thickness direction, and the outer peripheral surface of the connecting ring is flush with the outer peripheral edge of the flat plate. The connecting ring and the portion of the flat plate connected to the connecting ring constitute the connecting part, and the remaining portion of the flat plate constitutes the blasting part.

10. The relay according to any one of claims 1 to 7, characterized in that, The valve plate includes a flat plate with a split structure and two connecting rings. The two connecting rings are respectively connected to the two side surfaces of the flat plate in the thickness direction, and the outer peripheral surface of each connecting ring is flush with the outer peripheral edge of the flat plate. The two connecting rings and the portion of the flat plate connected to the connecting rings constitute the connecting part, and the remaining portion of the flat plate constitutes the blasting part.

11. The relay according to any one of claims 1 to 7, characterized in that, The connecting part has a first surface and a second surface arranged opposite to each other in the thickness direction, and the explosive part has a third surface and a fourth surface arranged opposite to each other in the thickness direction; The third surface is flush with the first surface, the fourth surface is located within the space enclosed by the connecting portion, and the second surface is connected to the cavity wall of the inner cavity.

12. The relay according to any one of claims 1 to 7, characterized in that, The connecting part has a first surface and a second surface arranged opposite to each other in the thickness direction, and the explosive part has a third surface and a fourth surface arranged opposite to each other in the thickness direction; The third surface is lower than the first surface, and the fourth surface is lower than the second surface.

13. The relay according to any one of claims 1 to 7, characterized in that, The valve assembly includes multiple stacked valve plates; In two adjacent valve plates, the two adjacent connecting portions are connected, and the two adjacent bursting portions are arranged at intervals along the thickness direction of the valve plate.

14. The relay according to any one of claims 1 to 7, characterized in that, The connection point between the inner circumferential surface of the connecting part and one side surface of the explosive part in the thickness direction forms a transition part.

15. The relay according to claim 14, characterized in that, The transition section can be any of the following structures: a chamfer, an inner rounded corner, or a combination of a chamfer and an inner rounded corner.

16. The relay according to claim 14, characterized in that, The connecting part and the explosive part are separate structures, and are connected by welding or bonding. The transition section is formed by the accumulation of solder or glue.

17. The relay according to any one of claims 1 to 7, characterized in that, The inner cavity wall has multiple pressure relief holes, and the relay includes multiple valve assemblies, the positions of which correspond to the positions of the multiple pressure relief holes, for closing the multiple pressure relief holes.

18. The relay according to claim 17, characterized in that, The thickness of the burst portion in the multiple valve assemblies is not equal.

19. The relay according to claim 1, characterized in that, The encapsulation cavity includes: A yoke plate having a first through hole that penetrates the yoke plate along its thickness direction; An insulating cover, connected to one side surface of the yoke plate in the thickness direction via a frame, forms a first chamber; and A metal cover is attached to the other side surface of the yoke plate in the thickness direction to form a second chamber; The first chamber and the second chamber are connected through the first perforation and form the inner cavity.

20. The relay according to claim 19, characterized in that, The yoke plate has the pressure relief hole, and the valve assembly is connected to the yoke plate.

21. The relay according to claim 20, characterized in that, The yoke plate has a recessed groove on one side surface in the thickness direction, and the pressure relief hole penetrates the bottom surface of the recessed groove. At least a portion of the valve assembly is located within the sinkhole.

22. The relay according to claim 19, characterized in that, The insulating cover has the pressure relief hole, and the valve assembly is connected to the insulating cover.

23. The relay according to claim 22, characterized in that, The insulating cover includes: Top wall; and A sidewall is connected to the outer periphery of the top wall; the top wall and / or the sidewall has the pressure relief hole.

24. The relay according to claim 19, characterized in that, The frame plate has the pressure relief hole, and the valve assembly is connected to the frame plate.

25. The relay according to claim 19, characterized in that, The metal cover has the pressure relief hole, and the valve assembly is connected to the inner or outer wall surface of the metal cover.

26. The relay according to claim 1, characterized in that, The inner cavity is a completely sealed chamber.

27. The relay according to claim 1, characterized in that, The valve assembly is configured to close the pressure relief port when the gas pressure inside the cavity is less than the threshold.

28. The relay according to claim 1, characterized in that, The structural strength of the bursting part is less than the structural strength of the encapsulation cavity.

29. The relay according to claim 28, characterized in that, The material of the bursting part is different from the material of the encapsulation cavity; and / or, the thickness of the bursting part is less than the thickness of the cavity wall of the inner cavity.

30. The relay according to claim 1, characterized in that, The blasting section is made of ceramic material.

31. The relay according to claim 1, characterized in that, The thickness of the blasting section is less than the thickness of the connecting section.

32. The relay according to claim 1, characterized in that, The connecting part is welded to the packaging cavity.

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