CN220493364U - Pressure relief side plate of sealed case and sealed case - Google Patents

Abstract

The utility model discloses a pressure relief side plate of a sealed case and the sealed case, wherein the pressure relief side plate comprises a plate body and a sealing piece, and at least one pressure relief hole penetrating through the inner surface and the outer surface of the plate body is formed in the plate body; the outer edge of the sealing element is provided with flexible parts, the number of the sealing elements is the same as that of the pressure relief holes, the sealing elements are arranged in the pressure relief holes in a one-to-one correspondence manner so that the flexible parts are in sealing fit with the hole walls of the pressure relief holes, and the sealing element is suitable for being separated from the pressure relief holes when the pressure of gas in the sealing cavity acting on the sealing element is larger than the friction force between the flexible parts and the pressure relief holes. Each sealing element can realize pressure relief independently, so that harm is reduced, and after pressure relief is finished, the sealing elements can be reused after the plate body is not damaged; the outer edge of the sealing piece is provided with a flexible part, so that impact force can be reduced, harm to human bodies and objects is prevented, and sealing is easier to realize. Because the pressure release hole is arranged on the plate body of the pressure release side plate, the waterproof performance is easier to be ensured relative to the arrangement of the top plate.

Description

Pressure relief side plate of sealed case and sealed case

Technical Field

The utility model relates to the field of electrical equipment, in particular to a pressure relief side plate of a sealed case and the sealed case.

Background

In the prior art, the IP grade of the chassis is generally more than or equal to IP65, namely the protection grade of the electrical equipment shell against the invasion of foreign matters, when the IP grade of the chassis is more than or equal to IP65, dust can be prevented from entering the interior of the chassis, and the waterproof sealing effect is better, so that electronic components in the chassis can be free from the influence of dust and water vapor, the service life is prolonged, the chassis is generally assembled by a top plate, a side plate and a bottom plate, the side plate is used for connecting the top plate and the bottom plate, and the top plate, the side plate and the bottom plate are jointly enclosed to form a sealing cavity, thereby realizing the air tightness requirement; however, in general, even if the air tightness requirement is met, the ventilation valve is arranged on the case to realize the air pressure balance between the inside and the outside of the case, so that the temperature or the air generated by the internal electronic components can be prevented from causing the internal air pressure change or the external air pressure change caused by the change of the ambient temperature, the pressure difference between the inside and the outside can be caused, the case shell can be expanded to influence the subsequent use, the caliber of the ventilation valve is usually only a few millimeters, and the balance of the inside and the outside air pressure can be ensured when the internal electronic components normally work, but once the internal electronic components are failed or damaged, for example, the high temperature or the liquid medium gasification occurs, the internal air pressure can be rapidly increased in a short time, the ventilation valve has too small caliber and can not play a role of releasing the pressure in time, so that the weak part of the case shell can be exploded outwards, and the safety of a user or a maintainer is seriously influenced.

Disclosure of Invention

The utility model aims to overcome the defects or problems in the prior art and provide a pressure relief side plate of a sealed chassis and the sealed chassis.

To achieve the above object, the present utility model and its preferred embodiments adopt the following technical solutions but the embodiments are not limited to the following solutions:

the first scheme is a pressure relief side plate of a sealed case, which is suitable for being enclosed with a plurality of plates to form the sealed case with a sealed cavity, and comprises

The plate body is provided with at least one pressure relief hole penetrating through the inner surface and the outer surface of the plate body;

the sealing piece is provided with flexible parts at the outer edge, the number of the sealing pieces is the same as that of the pressure relief holes, the sealing pieces are arranged in the pressure relief holes in a one-to-one correspondence manner so that the flexible parts are in sealing fit with the wall of the pressure relief holes, and the sealing piece is suitable for being separated from the pressure relief holes when the pressure of the gas in the sealing cavity acting on the sealing piece is larger than the friction force between the flexible parts and the pressure relief holes.

Based on the scheme I, the pressure relief hole is formed in one end, close to the ground, of the plate body.

According to a third scheme, based on the second scheme, the pressure relief hole extends downwards from the inner surface of the plate body to the outer surface of the plate body in an inclined mode.

Scheme four, based on scheme one, the plate body still includes the pressure release portion that a plurality of intervals set up, the thickness of pressure release portion department is less than the thickness of other positions departments of plate body, just pressure that pressure release portion split required is greater than makes sealing member breaks away from pressure release hole required pressure.

The fifth scheme is based on the fourth scheme, the pressure relief portion comprises a first pressure relief portion and a second pressure relief portion which are arranged at intervals, and the thickness of the first pressure relief portion is smaller than that of the second pressure relief portion.

According to the sixth scheme, based on the fifth scheme, the exhaust amount of the first pressure relief portion when the first pressure relief portion is completely cracked is smaller than the exhaust amount of the second pressure relief portion when the second pressure relief portion is completely cracked.

According to the seventh scheme, based on the fourth scheme, the pressure relief groove is formed in the plate body, the pressure relief groove is formed in the inner surface of the plate body, and a pressure relief portion is formed between the groove bottom of the pressure relief groove and the outer surface of the plate body.

According to an eighth aspect, based on the seventh aspect, the pressure relief groove has at least two extending portions, and the two extending portions intersect.

A ninth aspect is a sealed enclosure, at least including one pressure relief side plate of the sealed enclosure according to any one of the first to eighth aspects.

The tenth scheme is based on the ninth scheme, and the device further comprises a top plate, a bottom plate and a plurality of side plates, wherein two ends of each side plate are respectively connected with the top plate and the bottom plate, and the top plate, the bottom plate and the side plates are fixedly connected and enclosed to form a sealing cavity; at least one of the side plates is the pressure relief side plate; the thickness of the top plate, the bottom plate and the rest of the side plates is greater than that of the pressure relief side plates.

As can be seen from the above description of the present utility model and the preferred embodiments thereof, compared with the prior art, the technical solution of the present utility model and the preferred embodiments thereof have the following beneficial effects due to the following technical means:

1. according to the scheme I and the preferred embodiment thereof, the number of the sealing elements is the same as that of the pressure relief holes, the sealing elements are arranged in the pressure relief holes in a one-to-one correspondence manner and are in sealing fit with the hole walls of the pressure relief holes, pressure relief can be independently realized by the sealing elements, the force of each sealing element separating from the corresponding pressure relief hole is small, pressure relief is conveniently realized, harm is reduced by separation, and after pressure relief is finished, the sealing elements can be reused because the plate body is not damaged; and the outer edge of the sealing piece is provided with a flexible part, so that the impact force can be reduced, the harm to human bodies and objects is prevented, and the sealing is easier to realize. Because the pressure release hole is arranged on the plate body of the pressure release side plate, the waterproof performance is easier to be ensured relative to the arrangement of the top plate.

2. In the second scheme and the preferred embodiment thereof, various electric devices are sequentially arranged from top to bottom in the case, and the pressure relief holes are arranged above the pressure relief holes, so that most of electric devices are influenced when water is not well sealed, the pressure relief holes are arranged below the ground, most of electric devices are prevented from being influenced when water is fed as much as possible, and the pressure relief holes are arranged below the pressure relief holes, so that when the sealing element is separated from the pressure relief holes, the flight track of the pressure relief holes is close to the ground, and important positions such as a head and a heart are not hit, and the pressure relief holes are safer.

3. Scheme three and its preferred embodiment, pressure release hole slope downward setting, waterproof nature is better, and the sealing member breaks away from pressure release Kong Shidi once will strike in ground, even follow-up bullet to human damage also further reduces, safer.

4. Scheme IV and preferred embodiment because the more the pressure release hole sets up, its gas tightness just probably is worse, therefore the quantity of pressure release hole can not a large amount of equipartitions in whole pressure release curb plate, when the pressure release hole still can not guarantee the pressure release, if still only carry out the pressure release through the pressure release hole this moment, then the board can bear the pressure and explode, produces danger. Therefore, the thickness of the pressure release part is smaller than that of other positions of the plate body, so that the pressure release part is better than other parts to crack and release pressure, and the pressure release side plate can be reused for a plurality of times, so that the pressure release part is required to act on the sealing element, namely the pressure required by cracking the pressure release part is larger than the pressure required by separating the sealing element from the pressure release hole. The pressure relief portions are arranged at intervals to ensure that cracks of adjacent pressure relief portions are not connected, so that large-area explosion is caused, and danger is caused when the pressure relief portions are separated from the plate body.

5. Scheme five and preferred embodiment thereof, pressure release portion include first pressure release portion and the second pressure release portion that the interval set up, and the thickness of first pressure release portion is less than the thickness of second pressure release portion. Therefore, the step-by-step cracking is realized, the problem that the plate body is difficult to repair and cannot be reused due to the large-scale same-stage cracking is prevented.

6. The sixth scheme and the preferred embodiment thereof, the exhaust volume of the first pressure relief portion when fully cracking is smaller than that of the second pressure relief portion when fully cracking, and because the second pressure relief portion is the last stage of pressure relief, the pressure relief volume is ensured to be larger as much as possible, and the risk that the side plate is exploded due to the fact that the pressure relief cannot be performed when the first pressure relief portion is also used for pressure relief is prevented.

7. Scheme seven and preferred embodiment thereof, the relief groove opening is more pleasing to the eye in the internal surface of plate body, and the tank bottom of relief groove and the part between the surface of plate body form the relief portion, and the relief portion is along the fracture of relief groove's shape.

8. According to the scheme eight and the preferred embodiment thereof, the pressure relief groove is provided with at least two extending parts, and the two extending parts are intersected, so that when the pressure relief part cracks along the pressure relief groove, a part of the pressure relief part is still connected with the main part of the plate body, and damage and danger caused by flying scraps are prevented.

9. The ninth aspect and the preferred embodiments thereof provide a sealed chassis, which at least includes a pressure relief side plate of the sealed chassis according to any one of the above, and has the beneficial effects brought by the pressure relief side plate.

10. Scheme ten and its preferred embodiment, the thickness of roof, bottom plate and other curb plates is greater than the thickness of pressure release curb plate, and the purpose that sets up like this makes this pressure release curb plate become sealed quick-witted case weak portion, takes place the pressure release action in preference to other boards to from the cost, because this pressure release curb plate is fragile, the thinner cost that can reduce of making, the processing of pressure release hole, pressure release groove is also more convenient when thinner.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the description of the embodiments below are briefly introduced, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a pressure relief side plate applied to a sealed chassis;

FIG. 2 is a cross-sectional view of the pressure relief side plate at A-A of FIG. 1;

FIG. 3 is a schematic diagram of another embodiment of the pressure relief side plate applied to a sealed chassis according to the first embodiment;

FIG. 4 is a schematic view of a plate body with only pressure relief holes of the pressure relief side plate according to the first embodiment;

fig. 5 is a cross-sectional view of a sealed enclosure of the second embodiment.

The main reference numerals illustrate:

a pressure relief side plate 1; a plate body 11; a pressure relief hole 111; a pressure release part 112; a first pressure release portion 1121; a second pressure relief portion 1122; a pressure relief groove 113; a first groove 1131; a second groove 1132; a seal 12;

the cavity 2 is sealed.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to be understood that the described embodiments are preferred embodiments of the utility model and should not be taken as excluding other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without creative efforts, are within the protection scope of the present utility model.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the utility model.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Referring to fig. 1-3, a pressure relief side plate 1 of a sealed chassis adapted for enclosing a plurality of plates to form a sealed chassis having a sealed cavity 2, the pressure relief side plate 1 comprising a plate body 11 and a seal 12.

Referring to fig. 1-2, the plate 11 is provided with at least one pressure relief hole 111 penetrating through the inner and outer surfaces of the plate 11, in this embodiment, the inner surface of the plate 11 refers to a surface participating in forming the cavity wall of the sealed cavity 2, the outer surface of the plate 11 and the inner surface of the plate 11 deviate from each other, and the outer surface of the plate 11 refers to a surface contacting with the external environment. In this embodiment, the pressure release hole 111 is preferably disposed at one end of the plate 11 near the ground, that is, near the lower position, and the pressure release hole 111 extends obliquely downward from the inner surface of the plate 11 to the outer surface of the plate 11, so as to be more waterproof and ensure safety. Wherein, the lower direction is the direction facing the ground, and the upper direction is the direction away from the ground.

The plate body 11 is also provided with a plurality of pressure relief portions 112 which are arranged at intervals, and the pressure relief portions 112 are arranged at intervals so as to ensure that cracks of adjacent pressure relief portions 112 are not connected, so that the plate body 11 is broken away in a large area, and danger is caused. The thickness of the pressure release portion 112 is smaller than the thickness of the other positions of the plate 11, so that the pressure release portion 112 is cracked to ensure pressure release in preference to other positions, wherein the thickness of the other positions of the plate 11 is generally the distance from the inner surface to the outer surface of the plate 11, the thickness of the pressure release portion 112 is the length of the pressure release portion 112 in the thickness direction, and the thickness direction is the direction perpendicular to the inner surface and the outer surface of the plate 11 (the thickness of the top plate and the bottom plate is also the direction perpendicular to the inner surface and the outer surface). Specifically, the plate 11 is provided with a pressure relief groove 113, the pressure relief groove 113 is opened on the inner surface of the plate 11, and a pressure relief portion 112 is formed between the bottom of the pressure relief groove 113 and the outer surface of the plate 11. It should be understood that the pressure relief groove 113 may also be opened on the outer surface of the plate 11, such that a portion between the bottom of the pressure relief groove 113 and the inner surface of the plate 11 forms the pressure relief portion 112. The pressure relief groove 113 may be machined by milling. The pressure relief groove 113 has at least two extending portions, and the two extending portions intersect, so that the pressure relief groove 113 is of a non-fully enclosed structure, and when the pressure relief portion 112 is broken along the pressure relief groove 113, a part of the pressure relief portion is still connected with the main portion of the plate 11 to prevent damage and danger caused by flying scraps, for example, the projection shape of the pressure relief groove 113 on the outer surface of the plate 11 is one or more of a combination of a ten shape, a solid shape, a Y shape, a V shape, a L shape, or a U shape, or a rotation shape in the above examples.

Specifically, in this embodiment, the pressure relief groove 113 includes a first groove 1131 and a second groove 1132, the pressure relief portion 112 includes a first pressure relief portion 1121 and a second pressure relief portion 1122, the first groove 1131 corresponds to the first pressure relief portion 1121, the second groove 1132 corresponds to the second pressure relief portion 1122, the first pressure relief portion 1121 and the second pressure relief portion 1122 are also spaced apart from each other, and the thickness of the first pressure relief portion 1121 is smaller than the thickness of the second pressure relief portion 1122, i.e. the groove depth of the first groove 1131 is smaller than the groove depth of the second groove 1132, thereby realizing step-by-step cracking, preventing the plate 11 from being repaired difficultly due to the same-level cracking in a large range and being unable to be reused. And the exhaust volume of the first pressure relief portion 1121 when fully cracking is smaller than that of the second pressure relief portion 1122 when fully cracking, because the second pressure relief portion 1122 is the last stage of pressure relief, the pressure relief volume is ensured as much as possible, and the risk of side plate explosion caused by the fact that the pressure relief is impossible when the first pressure relief portion 1121 is also relieved is prevented. As in the present embodiment, the area of the first grooves 1131 is smaller than the area of the second grooves 1132, so the amount of exhaust when the first pressure relief portion 1121 is completely cracked will be smaller than the amount of exhaust when the second pressure relief portion 1122 is completely cracked.

Specifically, in the present embodiment, the number of the first grooves 1131 is several, the number of the second grooves 1132 is one, as shown in fig. 1, the second grooves 1132 are formed by mutually connecting one transverse groove and one longitudinal groove, and four quadrants are formed, where the number of the first grooves 1131 is distributed in the four quadrants. Alternatively, as shown in fig. 3, the second grooves 1132 are formed by connecting a plurality of transverse grooves with one longitudinal groove, and are in a fishbone shape, and a plurality of first grooves 1131 are in a group, and each group of first grooves 1131 is located between two adjacent fishbones.

Referring to fig. 2, the outer edge of the seal member 12 is provided with a flexible portion, such as a portion of the outer edge made of a rubber material or plastic, and the inner portion made of another material, it should be appreciated that the portion of the seal member 12 other than the outer edge may also be a flexible portion, such as an entire portion made of a rubber material. The number of the sealing pieces 12 is the same as that of the pressure relief holes 111, and the sealing pieces 12 are arranged in the pressure relief holes 111 in a one-to-one correspondence manner so that the flexible parts are in sealing fit with the wall of the pressure relief holes 111, and the sealing pieces 12 are suitable for being separated from the pressure relief holes 111 when the pressure of the gas in the sealing cavity 2 acting on the sealing pieces 12 is larger than the friction force between the flexible parts and the pressure relief holes 111. And the pressure required for the pressure relief portion 112 (including the first pressure relief portion 1121 and the second pressure relief portion 1122) to rupture is greater than the pressure required for the seal 12 to disengage from the pressure relief hole 111, to ensure that the pressure relief side plate 1 can be reused multiple times.

In the pressure relief side plate 1 of this scheme, when the pressure in the seal chamber 2 reaches a certain level, the seal 12 is first separated from the pressure relief hole 111, and the pressure is released through the pressure relief hole 111, if the pressure release of the pressure relief hole 111 is not satisfied enough, the first pressure relief portion 1121 is split in advance to release the pressure, and if the washing liquid of the first pressure relief portion 1121 is still not satisfied enough, the second pressure relief portion 1122 is split to release the pressure.

Compared with the prior art, the number of the sealing elements 12 is the same as that of the pressure relief holes 111, the sealing elements 12 are arranged in the pressure relief holes 111 in a one-to-one correspondence manner and are in sealing fit with the wall of the pressure relief holes 111, pressure relief can be independently realized by each sealing element 12, the force of each sealing element 12 separating from the corresponding pressure relief hole 111 is small, pressure relief is conveniently realized, harm is reduced by separation, and only when the pressure relief holes 111 can realize pressure relief, the sealing elements 12 can be reused because the plate 11 is not damaged; and the outer edge of the sealing member 12 is provided with a flexible part, so that impact force can be reduced, harm to human bodies and objects is prevented, and sealing is easier to realize. Since the pressure release hole 111 is provided in the plate body 11 of the pressure release side plate 1, the waterproof property can be ensured more easily than in the case of providing a top plate. In order to ensure that the pressure relief side plate 1 can be reused a plurality of times, it is necessary that the pressure relief portion 112 acts on the sealing member 12 after the pressure relief portion 112 is broken, that is, the pressure required for breaking the pressure relief portion 112 is greater than the pressure required for releasing the sealing member 12 from the pressure relief hole 111.

Of course, in another embodiment, the pressure relief portion 112 may not be provided, and as shown in fig. 4, the plate body 11 of the pressure relief side plate 1 only has the pressure relief hole 111, and the sealing member 12 is matched with the pressure relief hole 111.

Embodiment two:

referring to fig. 5, a sealed chassis further includes a top plate, a bottom plate, and a plurality of side plates, two ends of each side plate are respectively connected to the top plate and the bottom plate, in this embodiment, four side plates are fixedly connected to the top plate, the bottom plate, and the side plates, and enclose a sealed cavity 2; at least one of the side plates is a pressure relief side plate 1; in general, one of the side plates has a maintenance door, and the side plate is the front side, and the side plate on the back side is usually attached to the wall, so the pressure release side plate 1 is generally located on the left and right side plates preferentially, and the pressure release side plate 1 is required to be reused by filling after the first pressure release portion 1121 is ruptured, but if the second pressure release portion 1122 is ruptured, the filling difficulty is high, the side plate is basically scrapped, and only one of the left and right side plates is the pressure release side plate 1 in order to reduce the cost. Also, in this embodiment, the thicknesses of the top plate, the bottom plate, and the remaining side plates are preferably greater than the thickness of the pressure release side plate 1. The purpose of this arrangement is to make this pressure relief side plate 1 a sealed case weak portion, take place the pressure relief action in preference to other boards, and from the cost point of view, because this pressure relief side plate 1 is vulnerable, the cost can be reduced to make thinner, and processing of pressure relief hole 111, pressure relief groove 113 is also more convenient when thinner.

The foregoing description of the embodiments and description is presented to illustrate the scope of the utility model, but is not to be construed as limiting the scope of the utility model. Modifications, equivalents, and other improvements to the embodiments of the utility model or portions of the features disclosed herein, as may occur to persons skilled in the art upon use of the utility model or the teachings of the embodiments, are intended to be included within the scope of the utility model, as may be desired by persons skilled in the art from a logical analysis, reasoning, or limited testing, in combination with the common general knowledge and/or knowledge of the prior art.

Claims (10)

1. The utility model provides a pressure release curb plate of sealed machine case, its is suitable for enclosing with a plurality of boards and forms the sealed machine case that has sealed chamber (2), its characterized in that: comprising

The plate comprises a plate body (11), wherein the plate body (11) is provided with at least one pressure relief hole (111) penetrating through the inner surface and the outer surface of the plate body (11); the sealing piece (12) is provided with flexible parts at the outer edge, the number of the sealing pieces (12) is the same as that of the pressure relief holes (111) and the sealing pieces are arranged in the pressure relief holes (111) in a one-to-one correspondence mode so that the flexible parts are in sealing fit with the wall of the pressure relief holes (111), and the sealing piece (12) is suitable for being separated from the pressure relief holes (111) when the pressure of gas in the sealing cavity (2) acting on the sealing piece (12) is larger than the friction force between the flexible parts and the pressure relief holes (111).

2. The pressure relief side panel of a sealed enclosure of claim 1, wherein: the pressure relief hole (111) is arranged at one end of the plate body (11) close to the ground.

3. The pressure relief side panel of a sealed enclosure of claim 2, wherein: the pressure relief hole (111) extends obliquely downwards from the inner surface of the plate body (11) to the outer surface of the plate body (11).

4. The pressure relief side panel of a sealed enclosure of claim 1, wherein: the plate body (11) further comprises a plurality of pressure relief portions (112) arranged at intervals, the thickness of the pressure relief portions (112) is smaller than that of other positions of the plate body (11), and the pressure required by cracking of the pressure relief portions (112) is larger than that required by releasing the sealing element (12) from the pressure relief holes (111).

5. The pressure relief side panel of a sealed enclosure of claim 4, wherein: the pressure relief part (112) comprises a first pressure relief part (1121) and a second pressure relief part (1122) which are arranged at intervals, and the thickness of the first pressure relief part (1121) is smaller than that of the second pressure relief part (1122).

6. The pressure relief side panel of a sealed enclosure of claim 5, wherein: the amount of exhaust gas when the first pressure release portion (1121) is completely broken is smaller than the amount of exhaust gas when the second pressure release portion (1122) is completely broken.

7. The pressure relief side panel of a sealed enclosure of claim 4, wherein: the pressure relief groove (113) is formed in the plate body (11), the pressure relief groove (113) is formed in the inner surface of the plate body (11), and a pressure relief portion (112) is formed between the bottom of the pressure relief groove (113) and the outer surface of the plate body (11).

8. The pressure relief side panel of a sealed enclosure of claim 7, wherein: the pressure relief groove (113) is provided with at least two extending parts, and the two extending parts are intersected.

9. A sealed chassis, characterized in that: pressure relief side plate (1) comprising at least one sealed chassis according to any of claims 1-8.

10. A sealed enclosure as defined in claim 9, wherein: the sealing device also comprises a top plate, a bottom plate and a plurality of side plates, wherein two ends of each side plate are respectively connected with the top plate and the bottom plate, and the top plate, the bottom plate and the side plates are fixedly connected and enclosed to form a sealing cavity (2); at least one of the side plates is the pressure relief side plate (1); the thickness of the top plate, the bottom plate and the rest of the side plates is larger than that of the pressure relief side plate (1).