An adjustable pressure relief structure and a sealed cabinet with pressure relief function

Abstract

This invention provides an adjustable explosion-proof pressure structure and a sealed cabinet with explosion-proof function. The adjustable explosion-proof pressure structure is used to fix or remove a fixed explosion-proof plate relative to the cabinet body. It includes: an adjusting member adapted to be adjustablely fixed to the cabinet body along a first direction, where the first direction is the movement direction of the explosion-proof plate; a fixing member having a connecting seat and abutting legs located on both sides of the connecting seat; the connecting seat at least upwards along the first direction and limitingly engaging with the adjusting member; the abutting legs extending vertically and / or obliquely downwards relative to the connecting seat along the first direction and adapted to abut against the explosion-proof plate to force the explosion-proof plate to be fixed to the cabinet body; the abutting legs are elastically deformably connected to the connecting seat, or the abutting legs themselves are adaptable to deformation. This explosion-proof structure allows adjustment of the trigger pressure according to actual needs, reducing material preparation costs.

Description

Technical Field

[0001] This invention relates to the field of explosion venting structure technology, specifically to an explosion venting structure with adjustable explosion venting pressure and a sealed cabinet with explosion venting function. Background Technology

[0002] In electrical cabinets, such as those housing battery modules and inverters, explosion venting structures are typically installed to prevent the cabinet from bursting due to abnormal heat dissipation from internal components. Common explosion venting structures employ either weakly connected explosion vent plates or openable explosion vent valves. The explosion vent plate disconnects from the cabinet under pressure, while the explosion vent valve automatically opens under pressure; both achieve pressure relief within the cabinet. However, when the trigger pressure of the explosion venting structure needs to be adjusted according to the actual requirements of the internal components, it is generally necessary to replace different models of explosion vent plates or valves, or adjust the number of explosion vent valves, resulting in high material costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the aforementioned defects or problems in the prior art and to provide a sealed cabinet with an adjustable explosion pressure and explosion venting function. This explosion venting structure can adjust the trigger pressure according to actual needs, thereby reducing material preparation costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: Technical Solution 1: An adjustable explosion relief structure for fixing or removing a fixed explosion relief plate relative to a cabinet, comprising: an adjusting member adapted to be adjustablely fixed to the cabinet along a first direction, the first direction being the movement direction of the explosion relief plate; a fixing member having a connecting seat and abutting legs located on both sides of the connecting seat; the connecting seat at least upward along the first direction and limitingly engaging with the adjusting member; the abutting legs extending vertically and / or obliquely downward relative to the connecting seat along the first direction and adapted to abut against the explosion relief plate to force the explosion relief plate to be fixed to the cabinet; the abutting legs being elastically deformably connected to the connecting seat, or the abutting legs themselves being deformable.

[0005] Technical Solution 2 based on Technical Solution 1: The adjusting component is provided with a connecting rod and a limiting part; the connecting rod passes through the connecting seat along a first direction and is adjustablely fixed to the cabinet; the limiting part is located above the connecting seat along the first direction to limit and cooperate with the connecting seat.

[0006] Based on technical solution one or two, technical solution three: the adjusting component is a bolt, which is threadedly connected to the cabinet body along the first direction.

[0007] Technical solution four, based on technical solution two, further includes a buffer element located between the limiting part and the connecting seat, and adapted to absorb the impact force of the connecting seat relative to the limiting part through elastic deformation.

[0008] Technical solution five based on technical solution one: the abutting legs are symmetrically arranged on both sides of the connecting seat.

[0009] Technical solution six based on technical solution one: The abutting leg is provided with an extension and a bending part; the extension extends vertically and / or obliquely downward along a first direction, and one end of the extension is connected to the connecting seat, and the other end is connected to the bending part; the bending part bends outward relative to the extension, and the junction of the extension and the bending part or the bending part itself is adapted to abut against the explosion relief plate.

[0010] Technical solution seven based on technical solution six: The junction of the extension and the bending part is smoothly transitioned.

[0011] Technical solution eight based on technical solution six: the bent portion bends outward relative to the extended portion and upward along the first direction.

[0012] Technical solution nine based on technical solution one: The adjusting member penetrates the explosion relief plate along the first direction.

[0013] In addition, the present invention provides technical solution ten: a sealed cabinet with explosion venting function, comprising: a cabinet body having an explosion vent; an explosion venting plate adapted to be assembled with the explosion venting port to cooperate with the cabinet body for sealing; and at least two explosion venting pressure adjustable explosion venting structures as described in any one of technical solutions one to nine, wherein the adjusting member is fixed to the cabinet body and the abutting leg of the fixing member abuts against the explosion venting plate.

[0014] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects: Technical Solution 1 provides an adjustable explosion venting structure, which includes an adjusting component and a fixing component. The adjusting component can be adjusted relative to the cabinet in a first direction. Under the action of the adjusting component, the connecting seat changes its position relative to the cabinet and the explosion venting plate, thereby causing the two abutting legs of the fixing component to change their opening posture relative to the connecting seat and their abutting angle relative to the explosion venting plate. When the two abutting legs tend to be vertically downward, the upward impact force of the explosion venting plate is transmitted more along the extension direction of the abutting legs. The abutting legs mainly bear the force along their own direction. At this time, the abutting leg body tends to deform as a whole, and the resistance to be overcome by this deformation is relatively large. Therefore, the explosion venting pressure required to trigger the opening of the explosion venting plate is relatively high. When the two abutting legs gradually tilt outward, the angle between the upward impact force of the explosion venting plate and the extension direction of the abutting legs increases. The force is more likely to form a bending moment at the connection between the abutting legs and the connecting seat, causing elastic deformation to occur preferentially at this connection. Since this connection is more prone to deformation, the explosion venting plate is more likely to push open the fixing component, and the pressure required to trigger the explosion venting is reduced. Therefore, this solution changes the tilt angle and stress deformation mode of the contact leg by adjusting the position of the adjusting component, thereby achieving adjustable explosion pressure.

[0015] In technical solution two, the adjusting component is equipped with a connecting rod and a limiting part. The connecting rod passes through the connecting seat, and the limiting part is located above the connecting seat. The cooperation between the connecting rod and the connecting seat provides a stable foundation for the installation and attitude adjustment of the fixing component. The limiting part axially limits the connecting seat, so that when the position of the adjusting component changes, the connecting seat can stably rise and fall accordingly, thereby reliably driving the two abutting legs to change the spatial attitude relative to the connecting seat and the explosion relief plate.

[0016] In technical solution three, the adjusting component uses bolts that are threadedly connected to the cabinet body. Since the bolts can generate a fixed axial displacement along the first direction when they rotate, the position of the connecting seat can be changed by turning the bolts, thereby changing the tilt angle of the two abutment legs.

[0017] In technical solution four, a buffer is installed between the limiting part and the connecting seat. When the explosion relief plate rises and pushes the fixing part to move, the connecting seat moves closer to the limiting part. The buffer first undergoes elastic compression, so that the movement of the connecting seat does not directly and rigidly collide with the limiting part, but first undergoes elastic energy absorption, thereby avoiding deformation of the connecting seat due to impact, and thus ensuring the accuracy of the explosion relief trigger pressure.

[0018] In technical solution five, the two abutment legs are symmetrically arranged on both sides of the connecting seat. In this way, the upward impact force of the explosion relief plate can be applied to the abutment legs on both sides more evenly, and the tilting state and deformation trend of the abutment legs on both sides are more likely to be consistent, thereby avoiding excessive deformation on one side first, which could cause the explosion relief plate to tilt, open, or get stuck.

[0019] In technical solution six, the abutment leg includes an extension and a bend. The extension extends vertically and / or obliquely downwards, while the bend bends outwards. The explosion venting plate is abutted at the junction of the extension and the bend, or at the bend itself. This allows the upward impact force of the explosion venting plate to more easily deflect relative to the extension direction of the abutment leg, resulting in a more pronounced overturning or bending tendency at the connection between the abutment leg and the connecting seat. Especially when the abutment leg is tilted outwards, this structure more easily converts the upward force of the explosion venting plate into a deformation driving force at the connection, thus facilitating the release of pressure on the explosion venting plate with lower resistance and achieving smoother triggering of the explosion vent.

[0020] In technical solution seven, the junction between the extension and the bend is smoothly transitioned. This smooth transition avoids stress concentration at the junction, allowing deformation to occur within a more reasonable area, which helps to stabilize the deformation process of the connecting leg.

[0021] In technical solution eight, the bent part bends outward relative to the extension part and upward along the first direction. When the explosion relief plate impacts upward, the contact relationship with the bent part is more conducive to converting the vertical impact force into a tendency to cause the abutment leg to flip outward, which is conducive to the stability of the deformation process of the abutment leg.

[0022] In technical solution nine, the adjusting component penetrates the explosion relief plate along the first direction. The adjusting component can act as a guide rod during the movement of the explosion relief plate, so that the explosion relief plate moves in a determined direction, ensuring that the pressure relief effect is consistent with expectations.

[0023] In technical solution ten, the sealed cabinet is equipped with an explosion vent, an explosion vent plate, and at least two of the aforementioned explosion vent pressure adjustable structures. Under normal conditions, the multiple explosion vent pressure adjustable structures work together to hold the explosion vent plate in place. When the pressure inside the cabinet increases, the explosion vent plate converts the internal pressure into an upward impact force, which is then applied to multiple fixing components. Since the posture of the contact legs of each fixing component can be pre-adjusted, the total pressure at which the explosion vent plate is triggered can be determined by setting the overall tilt state of each contact leg, thus achieving adjustment of the explosion vent trigger pressure. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a sealed cabinet with explosion-proof function according to an embodiment of the present invention; Figure 2 for Figure 1 Explosion diagram of the sealed cabinet; Figure 3 This is a schematic diagram of the explosion venting pressure adjustable explosion venting structure according to an embodiment of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the explosion venting pressure adjustable explosion venting structure according to an embodiment of the present invention. Figure 2 .

[0026] Explanation of key figure labels: 10. Sealing cabinet; 11. Cabinet body; 12. Explosion relief plate; 13. Fixing nut; 14. Sealing strip; 15. Explosion relief port; Adjusting component 20; connecting rod 21; limiting part 22; Fastener 30; Connecting seat 31; Abutting leg 32; Extension 321; Bending part 322; Abutting part 323; Buffer 40. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0029] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0030] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0031] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0032] Example This invention relates to a sealed cabinet 10 with explosion venting function. The sealed cabinet 10 can be applied to electrical cabinets such as battery modules and inverters. This type of electrical cabinet contains electronic components that are prone to abnormal heat generation, and an explosion venting structure is required to prevent abnormal explosions of the electrical cabinet.

[0033] Reference Figure 1 The sealing cabinet 10 provided in this embodiment mainly includes a cabinet body 11, an explosion relief plate 12, and at least two symmetrically arranged explosion relief pressure adjustable structures. Referring to... Figure 2The cabinet 11 is sealed on all four sides and has an explosion vent 15 at the top. A sealing strip 14 can be installed on the edge of the explosion vent 15. The explosion vent plate 12 is placed on the explosion vent 15 and is tightly attached to the sealing strip 14, thereby sealing the explosion vent 15 and forming a closed chamber inside the sealed cabinet 10.

[0034] Reference Figure 2 In this embodiment, the explosion vent 15 is generally rectangular, and the explosion vent plate 12 has the same shape as the explosion vent 15, but the size of the explosion vent plate 12 is larger than that of the explosion vent 15 to ensure that it can completely cover the explosion vent 15. Four of the above-mentioned adjustable explosion vent structures are provided, respectively arranged in... Figure 2 The explosion vent 15 is shown in four positions: front, back, left, and right, with the front and back positions being symmetrical and the left and right positions being symmetrical.

[0035] The aforementioned pressure-adjustable explosion-proof structure is used to fix or remove the fixed explosion-proof plate 12 relative to the cabinet 11. Under normal circumstances, it provides downward pressure to the explosion-proof plate 12, ensuring it adheres tightly to the sealing strip 14 and keeping the sealed cabinet 10 sealed. When abnormal heat generation from electronic components inside the sealed cabinet 10 causes the internal chamber pressure to increase beyond a preset range, the explosion-proof structure is released from the pressure of the explosion-proof plate 12, allowing it to move away from the cabinet 11 and opening the explosion-proof port 15. This allows gas inside the sealed cabinet 10 to escape quickly from the explosion-proof port 15, preventing the sealed cabinet 10 from exploding.

[0036] Among them, reference Figure 3 The explosion relief structure mainly includes an adjusting component 20, a fixing component 30, and a buffer component 40.

[0037] The adjusting member 20 is adapted to be adjustablely fixed to the cabinet 11 along a first direction. The first direction in this specification and claims is the up-down direction shown in the accompanying drawings, which is the direction of movement of the explosion relief plate 12. The adjusting member 20 can be a bolt with threads, capable of being threadedly connected to the cabinet 11 along the first direction. A nut corresponding to the adjusting member 20 can be provided on the cabinet 11. After the adjusting member 20 is screwed to the corresponding nut, its position relative to the cabinet 11 in the up-down direction can be adjusted by turning the adjusting member 20, and it can be fixed in an appropriate location. It should be noted that the length of the adjusting member 20 can be set relatively long, and the length of the nut can also be set relatively long, thereby ensuring the stability of the adjusting member 20 when fixed relative to the nut. Of course, in other embodiments, the adjusting member 20 can also be adjustablely fixed to the cabinet 11 in other ways, such as using a pin engaging with multiple positioning holes spaced apart along the first direction, or using a sliding groove engaging with a locking element (such as a set screw, a locking bolt, etc.), as long as the position of the adjusting member 20 along the first direction can be adjusted up and down and can be stably fixed.

[0038] Reference Figure 3 The adjusting member 20 is provided with a connecting rod 21 and a limiting part 22. The connecting rod 21 extends along a first direction and can serve as the threaded part of a bolt. The connecting rod 21 can penetrate the explosion relief plate 12 along the first direction, thereby allowing the explosion relief plate 12 to move in a defined direction. A limiting part 22 is formed at the top of the connecting rod 21. The limiting part 22 is an end cap structure with a radial dimension larger than that of the connecting rod 21, and can serve as the nut part of a bolt.

[0039] Reference Figure 3 The fastener 30 has a connecting seat 31 and two abutting legs 32 located on both sides of the connecting seat 31. The connecting seat 31 extends generally horizontally, and the two abutting legs 32 are connected to the symmetrical ends of the connecting seat 31. The abutting legs 32 extend vertically and / or obliquely downward relative to the connecting seat 31 in a first direction, so that the two abutting legs 32 can abut against the explosion relief plate 12 and force the explosion relief plate 12 to be fixed to the cabinet 11. The shape and position of the two abutting legs 32 can be set to be symmetrically arranged or asymmetrically arranged, but the lower ends of the two abutting legs 32 are roughly flush. For example, when one abutting leg 32 extends vertically downward and the other abutting leg 32 extends obliquely, the lower ends of the two abutting legs 32 that abut against the explosion relief plate 12 are roughly flush. As a preferred embodiment, the two abutting legs 32 preferably extend relative to the connecting seat 31 at the same angle.

[0040] Reference Figure 3 The connecting seat 31 moves upward in a first direction and engages with the adjusting member 20 for limiting. The connecting rod 21 of the adjusting member 20 can pass through the connecting seat 31 in the first direction. Then, the connecting seat 31 can abut upward against the limiting part 22 of the adjusting member 20, while the abutting leg 32 abuts downward against the explosion relief plate 12. In this way, the fixing member 30 is limited by the adjusting member 20 and the explosion relief plate 12 in the vertical direction. Furthermore, the abutting leg 32 is elastically deformable to the connecting seat 31, or the abutting leg 32 itself is adapted to deform. For example, the connection position between the abutting leg 32 and the connecting seat 31 is made of a metal material that can elastically deform within a certain range, or the abutting leg 32 itself is made of a metal material that can elastically deform within a certain range. When the adjusting member 20 moves downward, the abutting leg 32 will open outward to both sides; when the adjusting member 20 moves upward, the abutting leg 32 will retract inward.

[0041] Of course, in other embodiments, the connecting seat 31 can be limited to the adjusting member 20 in both the first direction upward and downward. That is, an additional nut can be provided on the adjusting member 20, which can cooperate with the nut to clamp the connecting seat 31, so that the position of the fixing member 30 can be changed directly by adjusting the position of the adjusting member 20.

[0042] Furthermore, referring to Figure 3The abutment leg 32 has an extension portion 321 and a bending portion 322. The extension portion 321 is the main extension portion 321 of the abutment leg 32, with its upper end connected to the edge of the connecting seat 31 and its lower end connected to the bending portion 322. The bending portion 322 bends outward relative to the extension portion 321, and the junction of the extension portion 321 and the bending portion 322, or the bending portion 322 itself, can abut against the explosion relief plate 12. The bending portion 322 bending outward relative to the extension portion 321 means that the bending direction of the bending portion 322 is away from the location of the adjusting member 20. Meanwhile, the part on the fixing member 30 used to abut against the explosion relief plate 12 is defined as the abutment portion 323. In this embodiment, the bending portion 322 bends outward relative to the extension portion 321 and upward along a first direction, meaning that the bending portion 322 has an outward and upward inclined extension trend. Therefore, the abutment portion 323 is the junction of the extension portion 321 and the bending portion 322.

[0043] Furthermore, the junction between the extension 321 and the bend 322 can be made into a smooth transition, that is, the side surface used to abut against the explosion relief plate 12 can be made into a transition structure with an arc shape.

[0044] In addition, the fastener 30 can be set as a one-piece metal part. Since there is no additional splicing or assembly connection between the connecting seat 31 and the two abutment legs 32, the force transmitted from the explosion relief plate 12 to the abutment legs 32 can be directly transmitted to the connecting seat 31 through the continuous material, and the tilting posture change of the abutment legs 32 and the deformation response at the connection are more consistent.

[0045] Additionally, refer to Figure 3 A buffer 40 is provided between the limiting part 22 and the connecting seat 31. The buffer 40 is adapted to absorb the impact force of the connecting seat 31 relative to the limiting part 22 through elastic deformation. For example, the buffer 40 can be a spring or a rubber washer, which can be sleeved on the connecting rod 21 and disposed between the limiting part 22 and the connecting seat 31. When the pressure inside the cabinet increases sharply, the explosion relief plate 12 is subjected to an upward internal impact force and pushes the fixing part 30 upward. The connecting seat 31 will slide upward along the connecting rod 21 and approach the limiting part 22. At this time, the buffer 40 will be compressed first and undergo elastic deformation, thereby absorbing the impact force of the connecting seat 31 moving upward and hitting the limiting part 22, avoiding violent rigid collisions that could damage the components, and thus ensuring the accuracy of the explosion relief trigger pressure.

[0046] Reference Figure 3 and Figure 4The explosion relief pressure adjustable structure provided in this embodiment can adjust the height of the limiting part 22 and the connecting seat 31 relative to the cabinet 11 by turning the adjusting part 20 to change its screw-in depth into the cabinet 11. As the height position changes, the opening posture of the two abutting legs 32 relative to the connecting seat 31 and the tilt angle of abutting against the explosion relief plate 12 will also change. When the adjustment makes the two abutting legs 32 tend to be vertically downward, the upward impact force of the explosion relief plate 12 is transmitted more along the extension direction of the abutting legs 32. At this time, the resistance overcome by the overall deformation of the abutting leg 32 body is relatively large, so the explosion relief pressure required to trigger the explosion relief is relatively high. When the adjustment makes the two abutting legs 32 gradually tilt outward, the angle between the impact force and the extension direction of the abutting legs 32 increases. The force is very likely to form a bending and overturning moment at the connection between the abutting leg 32 and the connecting seat 31. Since elastic bending deformation is more likely to occur at this point, the resistance required for the explosion relief plate 12 to push open the fixing part 30 is reduced, and the pressure required to trigger the explosion relief is also reduced. Therefore, there is no need to replace different models of explosion relief plates 12. The trigger explosion relief pressure of the sealing cabinet 10 can be flexibly set by simply adjusting the position of the adjusting component 20, which greatly reduces the cost of material preparation and maintenance.

[0047] To further clarify the technical basis of "adjustable" in this scheme and provide a quantitative design basis, the following explains the relationship between the tilt angle of the abutment leg (32) and the explosion venting trigger pressure.

[0048] In a preferred embodiment of the present invention, the mechanical behavior of the abutment leg (32) can be simplified to establish a theoretical relationship between its structural parameters and the explosion relief pressure. The impact force of the explosion relief plate (12) acting on the bent portion (322) is defined as F, with its direction perpendicular to the explosion relief plate (12). The initial angle between the extension (321) of the abutment leg (32) and the inner wall plane of the cabinet (11) is α. The force F can be decomposed into a component force F∥ parallel to the extension (321) and a component force F⊥ perpendicular to the extension (321), wherein the component force that causes the abutment leg (32) to bend or become unstable at its root (i.e., at the connection point with the connecting seat 31) is mainly the component force. The impact force of the explosion relief plate (12) acting on the contact part of the abutment leg (32) (such as the junction of the extension and the bent portion or the surface of the bent portion) is defined as F, with its direction perpendicular to the explosion relief plate (12). Let α be the initial angle between the extension (321) of the abutment leg (32) and the inner wall plane of the cabinet (11). The force F can be decomposed into a component force F∥ parallel to the extension (321) and a component force F⊥ perpendicular to the extension (321). The component force F⊥ is the main component force that causes the abutment leg (32) to bend at the root (i.e., at the connection with the connecting seat 31), and F⊥ = F * sin(α).

[0049] The abutment leg (32) is simplified as a cantilever beam model with a fixed root. The section modulus of the root is W, and the yield strength of the material is σ_s. In order for the abutment leg (32) to fail (undergo plastic deformation or buckling), the root bending moment M ≥ σ_s * W must be satisfied. Wherein, the bending moment M ≈ F⊥ * L, and L is the equivalent force arm from the point of application of force F⊥ to the root, which can be approximated as the length of the bent part (322).

[0050] The stress at the root of the abutment leg (32) is simplified to a fixed constraint model (similar to the root of a cantilever beam), with a bending section modulus of W and a yield strength of σ_s. For the abutment leg (32) to fail (undergo plastic deformation or buckling), the root bending moment M ≥ σ_s * W must be satisfied. Wherein, the bending moment M ≈ F⊥ * L, and L is the equivalent force arm from the point of application of force F⊥ to the root.

[0051] Combining the above relationships, we can obtain the estimation formula for the explosion trigger pressure F: F ≈ (σ_s * W) / (L *sin(α)).

[0052] As can be seen from this formula, given that the material (determining σ_s), cross-sectional dimensions (determining W), and structural dimensions L of the abutment leg (32) are fixed, the explosion venting trigger pressure F is inversely proportional to sin(α). By continuously changing the tilt angle α of the abutment leg (32) by rotating the adjusting member (20), continuous and linear adjustment of the explosion venting trigger pressure F can be achieved. For example, if the angle α is adjusted from 30° to 60°, the sin(α) value increases from 0.5 to approximately 0.866, and under the same structural conditions, the expected explosion venting trigger pressure F can be reduced to approximately 58% of its original value. This provides a clear physical basis and quantitative design guidance for the pressure adjustable function of the present invention.

[0053] It should be noted that the above analysis is a simplified theoretical model. The original instruction manual mentioned that when the connecting leg tends to be vertical, it may involve the overall deformation mode of the body; while the above formula mainly reflects the trend of root bending deformation. The actual pressure relief is also affected by factors such as the stiffness of the connecting seat (31), dynamic load effect, and friction. In specific applications, the adjustment trend can be determined according to the above relationship, and the pressure-angle curve of the specific product can be calibrated through finite element simulation or experiment, so as to achieve accurate pressure setting.

[0054] This embodiment relates to an adjustable explosion relief structure, which includes an adjusting member 20 and a fixing member 30. The adjusting member 20 can be adjusted relative to the cabinet 11 in a first direction. Under the action of the adjusting member 20, the connecting seat 31 changes its position relative to the cabinet 11 and the explosion relief plate 12, thereby causing the two abutting legs 32 of the fixing member 30 to change their opening posture relative to the connecting seat 31 and their abutting angle relative to the explosion relief plate 12. When the two abutment legs 32 tend to be vertically downward, the upward impact force of the explosion relief plate 12 is mostly transmitted along the extension direction of the abutment legs 32. The abutment legs 32 mainly bear the force along their own direction. At this time, the abutment legs 32 body tends to deform as a whole. However, the resistance to be overcome in this deformation is relatively large. Therefore, the explosion relief pressure required to trigger the explosion relief plate 12 is relatively high. When the two abutment legs 32 gradually tilt outward, the angle between the upward impact force of the explosion relief plate 12 and the extension direction of the abutment legs 32 increases. The force is more likely to form a bending moment at the connection between the abutment legs 32 and the connecting seat 31, causing elastic deformation to occur preferentially at this connection. Since this connection is more prone to deformation, the explosion relief plate 12 is more likely to push open the fixing member 30, and the pressure required to trigger the explosion relief is reduced. Therefore, this solution changes the tilt angle and force deformation mode of the abutment legs 32 by adjusting the position of the adjusting member 20, thereby achieving adjustable explosion relief pressure.

[0055] In at least one embodiment, the adjusting member 20 is provided with a connecting rod 21 and a limiting part 22; the connecting rod 21 passes through the connecting seat 31 along a first direction and is adjustablely fixed to the cabinet 11; the limiting part 22 is located above the connecting seat 31 along the first direction to limit and cooperate with the connecting seat 31.

[0056] The adjusting component 20 is provided with a connecting rod 21 and a limiting part 22. The connecting rod 21 passes through the connecting seat 31, and the limiting part 22 is located above the connecting seat 31. The cooperation between the connecting rod 21 and the connecting seat 31 provides a stable foundation for the installation and attitude adjustment of the fixing component 30. The limiting part 22 axially limits the connecting seat 31, so that when the position of the adjusting component 20 changes, the connecting seat 31 can stably rise and fall accordingly, thereby reliably driving the two abutting legs 32 to change the spatial attitude relative to the connecting seat 31 and the explosion relief plate 12.

[0057] In at least one embodiment, the adjusting member 20 is a bolt that is threadedly connected to the cabinet 11 in a first direction.

[0058] The adjusting component 20 is connected to the cabinet 11 by a bolt threaded to it. Since the bolt can generate a fixed axial displacement in the first direction when it rotates, the position of the connecting seat 31 can be changed by turning the bolt, thereby changing the tilt angle of the two abutting legs 32.

[0059] In at least one embodiment, a buffer 40 is also included, which is located between the limiting portion 22 and the connecting seat 31 and is adapted to absorb the impact force of the connecting seat 31 relative to the limiting portion 22 through elastic deformation.

[0060] A buffer 40 is provided between the limiting part 22 and the connecting seat 31. When the explosion relief plate 12 rushes upward and pushes the fixing part 30 to move, the connecting seat 31 moves closer to the limiting part 22. The buffer 40 first undergoes elastic compression, so that the movement process of the connecting seat 31 is not a direct rigid collision with the limiting part 22, but rather an elastic energy absorption process. This avoids the connecting seat 31 from deforming due to impact, thereby ensuring the accuracy of the explosion relief trigger pressure.

[0061] In at least one embodiment, the abutment legs 32 are symmetrically arranged on both sides of the connecting seat 31.

[0062] Two abutment legs 32 are symmetrically arranged on both sides of the connecting seat 31. In this way, the upward impact force of the explosion relief plate 12 can be applied to the abutment legs 32 on both sides more evenly, and the tilting state and deformation trend of the abutment legs 32 on both sides are more likely to be consistent, thereby avoiding excessive deformation on one side first, which would cause the explosion relief plate 12 to tilt and open or get stuck.

[0063] In at least one embodiment, the abutment leg 32 is provided with an extension 321 and a bend 322; the extension 321 extends vertically and / or obliquely downward along a first direction, and one end of it is connected to the connecting seat 31, and the other end is connected to the bend 322; the bend 322 bends outward relative to the extension 321, and the junction of the extension 321 and the bend 322 or the bend 322 itself is adapted to abut against the explosion relief plate 12.

[0064] The abutment leg 32 includes an extension 321 and a bend 322. The extension 321 extends vertically and / or obliquely downward, while the bend 322 bends outward. The junction of the extension 321 and the bend 322, or the bend 322 itself, abuts against the explosion relief plate 12. In this way, the upward impact force of the explosion relief plate 12 can more easily be offset relative to the extension direction of the abutment leg 32, resulting in a more pronounced flipping or bending tendency at the connection between the abutment leg 32 and the connecting seat 31. Especially when the abutment leg 32 is tilted outward, this structure more easily converts the upward force of the explosion relief plate 12 into a deformation driving force at the connection, thus facilitating the release of pressure on the explosion relief plate 12 with lower resistance and achieving smoother triggering of explosion relief.

[0065] In at least one embodiment, the junction of the extension 321 and the bend 322 is smoothly transitioned.

[0066] The junction of the extension 321 and the bend 322 is smoothly transitioned. This smooth transition avoids stress concentration at the junction, allowing deformation to occur within a more reasonable area, which helps to stabilize the deformation process of the abutment leg 32.

[0067] In at least one embodiment, the bent portion 322 bends outward relative to the extension portion 321 and upward along a first direction.

[0068] The bending portion 322 bends outward relative to the extension portion 321 and upward along the first direction. When the explosion relief plate 12 impacts upward, the contact relationship with the bending portion 322 is more conducive to converting the vertical impact force into a tendency to cause the abutment leg 32 to flip outward, which is conducive to stabilizing the deformation process of the abutment leg 32.

[0069] In at least one embodiment, the adjusting member 20 extends through the explosion relief plate 12 along a first direction.

[0070] The adjusting member 20 passes through the explosion relief plate 12 along the first direction. The adjusting member 20 can be used as a guide rod during the movement of the explosion relief plate 12, so that the explosion relief plate 12 moves in a certain direction and ensures that the pressure relief effect is consistent with the expectation.

[0071] In at least one embodiment, a sealed cabinet 10 with explosion venting function is also involved, comprising: a cabinet body 11 having an explosion vent 15; an explosion vent plate 12 adapted to be fitted to the explosion vent 15 to cooperate with the cabinet body 11 for sealing; and at least two explosion venting pressure adjustable explosion venting structures as described in any one of technical solutions one to nine, symmetrically arranged, wherein an adjusting member 20 is fixed to the cabinet body 11, and an abutting leg 32 of a fixing member 30 abuts against the explosion vent plate 12.

[0072] The sealed cabinet 10 is equipped with an explosion vent 15, an explosion vent plate 12, and at least two of the aforementioned explosion vent pressure adjustable structures. Under normal conditions, the multiple explosion vent pressure adjustable structures work together to press against the explosion vent plate 12. When the pressure inside the cabinet increases, the explosion vent plate 12 converts the internal pressure into an upward impact force, which acts on multiple fixing members 30. Since the posture of the abutment legs 32 of each fixing member 30 can be pre-adjusted, the total pressure when the explosion vent plate 12 is triggered can be determined by setting the overall tilt state of each abutment leg 32, thus achieving adjustment of the explosion vent trigger pressure.

[0073] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. An explosion-proof pressure adjustable explosion-proof structure for fixing or removing a fixed explosion-proof plate (12) relative to a cabinet (11), characterized in that it comprises: Adjusting member (20), which is adapted to be adjustablely fixed to the cabinet (11) along a first direction, the first direction being the direction of movement of the explosion relief plate (12); The fastener (30) has a connecting seat (31) and abutting legs (32) located on both sides of the connecting seat (31); the connecting seat (31) is at least upwardly positioned in a first direction to limit the engagement of the adjusting member (20); the abutting legs (32) extend vertically and / or obliquely downward relative to the connecting seat (31) in the first direction and are adapted to engage with the explosion relief plate (12) to force the explosion relief plate (12) to be fixed to the cabinet (11); The abutting leg (32) is elastically deformably connected to the connecting seat (31), or the abutting leg (32) itself is adapted to deform.

2. The explosion relief pressure adjustable explosion relief structure as described in claim 1, characterized in that, The adjusting member (20) is provided with a connecting rod (21) and a limiting part (22); the connecting rod (21) passes through the connecting seat (31) along the first direction and is adjustablely fixed to the cabinet (11); the limiting part (22) is located above the connecting seat (31) along the first direction to limit and cooperate with the connecting seat (31).

3. The explosion relief pressure adjustable explosion relief structure as described in claim 1 or 2, characterized in that, The adjusting element (20) is a bolt, which is threaded to the cabinet (11) in a first direction.

4. The explosion relief pressure adjustable explosion relief structure as described in claim 2, characterized in that, It also includes a buffer (40) located between the limiting part (22) and the connecting seat (31), and is adapted to absorb the impact force of the connecting seat (31) relative to the limiting part (22) through elastic deformation.

5. The explosion relief pressure adjustable explosion relief structure as described in claim 1, characterized in that, The abutting legs (32) are symmetrically arranged on both sides of the connecting seat (31).

6. The explosion relief pressure adjustable explosion relief structure as described in claim 1, characterized in that, The abutment leg (32) is provided with an extension (321) and a bend (322); the extension (321) extends vertically and / or obliquely downward along a first direction, and one end of it is connected to the connecting seat (31), and the other end is connected to the bend (322); the bend (322) bends outward relative to the extension (321), and the junction of the extension (321) and the bend (322) or the bend (322) itself is adapted to abut against the explosion relief plate (12).

7. The explosion relief pressure adjustable explosion relief structure as described in claim 6, characterized in that, The junction of the extension (321) and the bend (322) is smoothly transitioned.

8. The explosion relief pressure adjustable explosion relief structure as described in claim 6, characterized in that, The bent portion (322) bends outward relative to the extension portion (321) and upward in a first direction.

9. The explosion relief pressure adjustable explosion relief structure as described in claim 1, characterized in that, The adjusting member (20) penetrates the explosion relief plate (12) along the first direction.

10. A sealed cabinet (10) with explosion venting function, characterized in that, include: The cabinet (11) has an explosion vent (15); An explosion relief plate (12) is adapted to be fitted onto the explosion relief port (15) to fit and seal with the cabinet (11); and At least two pressure-adjustable explosion relief structures as described in any one of claims 1-9 are symmetrically arranged, wherein the adjusting member (20) is fixed to the cabinet (11), and the abutting leg (32) of the fixing member (30) abuts against the explosion relief plate (12).

Images