Anti-knock box with excellent anti-knock performance

Abstract

This invention discloses an explosion-proof box with excellent explosion-proof performance, comprising a pressure relief base, an explosion-proof container, and an explosion-proof box body. The pressure relief base has a pressure relief channel communicating with the outside environment. The explosion-proof container is fixedly mounted on the pressure relief base, with asbestos filling the space between its outer wall and the inner wall of the explosion-proof box body. The explosion-proof container has an opening and an explosion-proof cover, and a pressure relief port at its bottom. A pressure relief inner liner is installed inside the pressure relief port, and the connecting cavity communicates with the inner cavity of the explosion-proof container through the pressure relief inner liner. The explosion-proof box body covers the explosion-proof container and is connected to the pressure relief base, and a door is installed on the explosion-proof box body. This invention not only possesses the anti-theft properties of traditional explosion-proof boxes but also has excellent explosion-proof performance, fire resistance, heat insulation, and sound insulation functions, providing superior safety.

Description

Technical Field

[0001] This invention belongs to the technical field of explosive material storage devices, specifically relating to an explosion-proof box with excellent explosion-proof performance. Background Technology

[0002] Detonators, explosives, and other explosive materials are the initiation materials for blasting projects. According to regulations, any remaining explosives for the day must be returned to the explosives warehouse in a timely manner. In cases where the construction site is far from the explosives storage warehouse and the explosives are to be used again the next day or soon, it is not possible to retrieve the explosives from the warehouse at any time, which increases costs. Therefore, explosion-proof boxes are temporarily placed near the construction site for storage.

[0003] Currently, explosion-proof boxes used for storing explosive hazardous materials generally only serve to prevent explosions and theft. For example, they can shield electromagnetic signals and eliminate static electricity. However, the explosion-proof boxes themselves have poor explosion resistance, which is far lower than that of existing explosion-proof containers. Adding an inner liner inside the explosion-proof box is one way to improve its explosion resistance. For example, publication number CN204678997U, entitled "An Explosion-Proof Box for Handling Explosive Hazardous Materials," describes an explosion-proof box that, compared to traditional explosion-proof boxes, has an inner box with a circular vent hole. The space between the inner box and the outer box is filled with semi-rigid polyurethane foam. In the event of an explosion within the inner box, the resulting shock wave propagates through the vent hole to the semi-rigid polyurethane foam between the inner box and the outer box, absorbing and buffering the energy to attenuate the shock wave pressure. However, the shock wave still exerts a significant impact on the outer box. Furthermore, the box's body and lid are sealed, preventing the shock wave from being released. Therefore, if the box's explosion-proof performance is low, it still poses a significant safety hazard.

[0004] While current explosion-proof containers have excellent explosion-proof performance, they do not have the heat insulation, fire resistance, and anti-theft functions of explosion-proof boxes. Therefore, it is necessary to develop an explosion-proof box with excellent explosion-proof performance. Summary of the Invention

[0005] To address the aforementioned drawbacks, this invention provides an explosion-proof box with excellent explosion-proof performance.

[0006] The objective of this invention is achieved through the following technical solution: an explosion-proof box with excellent explosion-proof performance, comprising a pressure relief base, an explosion-proof container, and an explosion-proof box body;

[0007] The pressure relief base is provided with a pressure relief channel that communicates with the outside of the pressure relief base. The pressure relief channel includes a connecting cavity and at least one second pressure relief cavity. The second pressure relief cavity and the connecting cavity, and the outer wall of the pressure relief base and the second pressure relief cavity are respectively connected by a third pressure relief hole. The inner wall of the connecting cavity is provided with a barrier layer with flame retardant, heat insulation and sound insulation functions. The barrier layer is provided with a through hole corresponding to the third pressure relief hole.

[0008] The explosion-proof container is fixedly mounted on the pressure relief base. Asbestos is filled between the outer wall of the explosion-proof container and the inner wall of the explosion-proof box. The explosion-proof container has an opening and an explosion-proof cover that can seal the opening. A storage platform with distributed through holes is fixedly installed inside the explosion-proof container. A pressure relief port is located at the bottom of the explosion-proof container. A pressure relief liner is installed inside the pressure relief port, located below the storage platform. The upper end of the pressure relief liner extends into the explosion-proof container, leaving a gap between the pressure relief liner and the storage platform. The lower end of the pressure relief liner extends into the connecting cavity and is close to or attached to the bottom of the connecting cavity. When the storage platform deforms, the pressure relief liner can... Sufficient to support the storage platform, the connecting cavity is connected to the inner cavity of the explosion-proof container through the pressure relief liner; the pressure relief liner includes a hollow shell, and at least two horizontally arranged wave-damping plates are fixedly installed inside the shell. The wave-damping plates divide the inner cavity of the shell into multiple longitudinally distributed first pressure relief cavities. Through holes are distributed on the wave-damping plates, and adjacent first pressure relief cavities are connected through the through holes on the wave-damping plates. The shell is provided with a first pressure relief hole that connects the uppermost first pressure relief cavity to the inner cavity of the explosion-proof container, and a second pressure relief hole that connects the lowermost first pressure relief cavity to the connecting cavity;

[0009] The explosion-proof enclosure is installed outside the explosion-proof container and connected to the pressure relief base. The explosion-proof enclosure is equipped with a door.

[0010] Preferably, a connecting sleeve is fixedly provided on the pressure relief base, and a connecting ring is fixedly provided at the pressure relief port of the explosion-proof container. The connecting ring is fitted into the connecting sleeve and screwed to the connecting sleeve. A first limiting block is fixedly provided on the outer wall of the connecting sleeve and fits against the top of the connecting cavity. A second limiting block is fixedly provided on the outer wall of the connecting ring and fits against the upper end of the connecting sleeve. The pressure relief inner liner is fitted into the connecting ring and the outer wall of the shell is screwed to the inner wall of the connecting ring.

[0011] Preferably, the pitch of the thread connecting the outer side of the connecting ring to the connecting sleeve is greater than the pitch of the thread connecting the inner side of the connecting ring to the housing.

[0012] Preferably, the diameters of the first pressure relief hole, the through hole on the wave-damping plate, and the second pressure relief hole gradually increase, and the sum of the flow areas of all the first pressure relief holes, the sum of the flow areas of all the through holes on the wave-damping plate, and the sum of the flow areas of all the second pressure relief holes gradually increase.

[0013] Preferably, a connecting rod is fixed between adjacent wave-damping plates.

[0014] Preferably, the end of the connecting rod is screwed to the corresponding wave-damping plate.

[0015] Preferably, the upper and lower surfaces of the shell are both spherical, and the middle part of the shell is an annular structure.

[0016] Preferably, the pressure relief base includes a top plate and a bottom plate, with a supporting circular tube and a shell fixedly disposed between the bottom plate and the top plate. The supporting circular ring is located inside the shell, the inner cavity of the supporting circular tube serves as the connecting cavity, and the space between the shell and the supporting circular tube serves as the second pressure relief cavity. The supporting circular tube and the shell are both provided with the third pressure relief hole.

[0017] Preferably, the explosion-proof enclosure or the pressure relief base is provided with forklift holes.

[0018] Preferably, the cabinet door is a security door equipped with a combination lock.

[0019] Preferably, the second pressure relief hole is evenly distributed around the bottom of the housing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By combining an explosion-proof container, an explosion-proof box, and a pressure relief base, this invention not only possesses excellent explosion-proof performance but also the anti-theft properties of traditional explosion-proof boxes.

[0022] 2. The pressure relief base and pressure relief liner can provide multiple pressure reliefs from the shock wave generated by an explosion inside the explosion-proof container, thereby further improving the explosion-proof performance of the present invention.

[0023] 3. The pressure relief liner not only relieves pressure but also supports the storage platform. The shock wave generated by the explosion inside the explosion-proof container will cause the storage platform to deform downwards. At this time, the pressure relief liner can support the storage platform and prevent it from embedding into the pressure relief base under the action of the shock wave, thereby preventing the pressure relief performance of the pressure relief base from being affected.

[0024] 4. Explosive materials are stored on the storage platform inside the explosion-proof container. In the event of an explosion, the inner cavity of the explosion-proof container explodes and is depressurized through the pressure relief liner and pressure relief base. The space between the explosion-proof box and the explosion-proof container is less affected and will not be subjected to the shock wave generated by the explosion. The shock wave will not directly affect the explosion-proof box. Therefore, the explosion-proof performance requirements of the explosion-proof box itself are low, and it is only necessary to use the existing explosion-proof box as the explosion-proof box structure.

[0025] 5. The asbestos used has high fire resistance, electrical insulation and heat insulation properties, while the barrier layer set on the inner wall of the connecting cavity has flame retardant, heat insulation and sound insulation functions. Therefore, the present invention also has a certain fire resistance. Even if a fire occurs outside the present invention, the heat can be isolated by the asbestos and the barrier layer, thereby improving the safety performance of the present invention.

[0026] 6. The pressure relief liner and the explosion-proof container, as well as the explosion-proof box and the pressure relief base, are connected by connecting rings and connecting sleeves. This prevents the pressure relief port from tearing during an explosion, enhances the explosion resistance of the pressure relief port, and facilitates welding, anti-corrosion treatment, and future maintenance of the pressure relief base.

[0027] 7. The second pressure relief hole is located around the bottom of the shell, which can change the discharge direction of the shock wave through the pressure relief liner to enhance the stability of the invention. Attached Figure Description

[0028] Figure 1 This is the front view of the present invention;

[0029] Figure 2 This is a top view of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0031] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0032] Figure 5 This is a schematic diagram of the internal structure of the pressure relief liner;

[0033] The markings in the diagram are: 1. Pressure relief base, 2. Explosion-proof container, 3. Explosion-proof box, 4. Connecting cavity, 5. Second pressure relief cavity, 6. Third pressure relief hole, 7. Barrier layer, 8. Connecting sleeve, 9. Top plate, 10. Bottom plate, 11. Supporting round tube, 12. Outer shell, 13. Asbestos, 14. Explosion-proof cover, 15. Storage platform, 16. Connecting ring, 17. First limiting block, 18. Second limiting block, 19. Pressure relief inner liner, 20. Shell, 21. Wave damping plate, 22. First pressure relief cavity, 23. Connecting rod, 24. Second pressure relief hole, 25. Box door, 26. Forklift hole, 27. First pressure relief hole. Detailed Implementation

[0034] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings:

[0035] Example 1

[0036] like Figures 1-5 As shown, an explosion-proof box with excellent explosion-proof performance includes a pressure relief base 1, an explosion-proof container 2, and an explosion-proof box body 3;

[0037] The pressure relief base 1 is provided with a pressure relief channel communicating with the outside of the pressure relief base 1. The pressure relief channel includes a connecting cavity 4 and a second pressure relief cavity 5. The second pressure relief cavity 5 and the connecting cavity 4, and the outer wall of the pressure relief base 1 and the second pressure relief cavity 5 are respectively connected by a third pressure relief hole 6. The inner wall of the connecting cavity 4 is provided with a barrier layer 7 with flame retardant, heat insulation and sound insulation functions. The barrier layer 7 is provided with a through hole corresponding to the third pressure relief hole 6. A connecting sleeve 8 is fixedly provided on the pressure relief base 1. The hollow position of the connecting sleeve 8 is connected to the connecting cavity 4.

[0038] The pressure relief base 1 includes a top plate 9 and a bottom plate 10. A supporting circular tube 11 and a housing 12 are fixedly disposed between the bottom plate 10 and the top plate 9. A supporting circular tube is located inside the housing 12. The inner cavity of the supporting circular tube 11 serves as the connecting cavity 4. The space between the housing 12 and the supporting circular tube 11 serves as the second pressure relief cavity 5. The supporting circular tube 11 and the housing 12 are both provided with the third pressure relief hole 6. The inner and outer sides of the connection between the upper end of the supporting circular tube 11 and the top plate 9, and the inner and outer sides of the connection between the lower end of the supporting circular tube 11 and the bottom plate 10 are all welded and fixed.

[0039] The explosion-proof container 2 is fixedly mounted on the pressure relief base 1. Asbestos 13 is filled between the outer wall of the explosion-proof container 2 and the inner wall of the explosion-proof housing 3. Asbestos 13 has high fire resistance, electrical insulation, and heat insulation properties, thus providing fire resistance, electrical insulation, and heat insulation. The explosion-proof container 2 has an opening and an explosion-proof cover 14 that can seal the opening. The explosion-proof cover 14 is connected to the explosion-proof container 2 by screws, snap-fits, or buckles. No asbestos 13 is placed on the outside of the explosion-proof cover 14 to facilitate the storage and retrieval of explosive materials. A storage platform 15 with distributed through holes is fixedly installed inside the explosion-proof container 2. The storage platform 15 is used to place explosive materials. The bottom of the inner cavity of the explosion-proof container 2 supports the storage platform 15, and the edges of the storage platform 15 are welded and fixed to the inner wall of the explosion-proof container 2.

[0040] The explosion-proof container 2 has a pressure relief port at its bottom. A connecting ring 16 is fixedly installed at the pressure relief port of the explosion-proof container 2. The connecting ring 16 is fitted into the connecting sleeve 8 and screwed to the connecting sleeve 8. The screwing method provides excellent sealing performance between the connecting ring 16 and the connecting sleeve 8. A first limiting block 17 is fixedly installed on the outer wall of the connecting sleeve 8 and fits against the top of the connecting cavity 4. A second limiting block 18 is fixedly installed on the outer wall of the connecting ring 16 and fits against the upper end of the connecting sleeve 8. The second limiting block 18 is welded to the outer wall of the explosion-proof container 2. A pressure relief inner liner 19 is provided inside the pressure relief port and located below the storage platform 15. The pressure relief inner liner 19 is fitted into the connecting ring 16 and screwed to the inner wall of the connecting ring 16. The screwing method provides excellent sealing performance between the pressure relief inner liner 19 and the connecting ring 16. The upper end of the pressure relief liner 19 extends into the explosion-proof container 2, and there is a gap between the pressure relief liner 19 and the storage platform 15. The lower end of the pressure relief liner 19 extends into the connecting cavity 4 and fits against the bottom of the connecting cavity 4. When the storage platform 15 deforms, the pressure relief liner 19 can be used to support the storage platform 15. The connecting cavity 4 is connected to the inner cavity of the explosion-proof container 2 through the pressure relief liner 19. The pressure relief liner 19 includes a hollow shell 20. The upper and lower surfaces of the shell 20 are spherical, and the middle portion is annular. Two horizontally arranged wave-damping plates 21 are fixed inside the shell 20, dividing the inner cavity of the shell 20 into multiple longitudinally distributed first pressure relief chambers 22. Through holes are distributed on the wave-damping plates 21, and adjacent first pressure relief chambers 22 are connected through these through holes. Connecting rods 23 are fixed between adjacent wave-damping plates 21, with the ends of the connecting rods 23 screwed to the corresponding wave-damping plates 21. The shell 20 has a first pressure relief hole 27 that connects the uppermost first pressure relief chamber 22 to the inner cavity of the explosion-proof container 2, and a second pressure relief hole 24 that connects the lowermost first pressure relief chamber 22 to the connecting cavity 4. The diameters of the first pressure relief hole 27, the through holes on the wave-damping plate 21, and the second pressure relief hole 24 gradually increase, and the sum of the flow areas of all the first pressure relief holes 27, the sum of the flow areas of all the through holes on the wave-damping plate 21, and the sum of the flow areas of all the second pressure relief holes 24 also gradually increase. The aforementioned flow areas are the pressure relief areas of the holes. We can control the explosion relief effect by controlling the ratio of the sum of the flow areas of all the first pressure relief holes 27, the sum of the flow areas of all the through holes on the wave-damping plate 21, and the sum of the flow areas of all the second pressure relief holes 24. If the test results are unsatisfactory, we only need to replace the pressure relief inner liner 19 with one of different flow area ratios for the first pressure relief hole 27, the through holes on the wave-damping plate 21, and the second pressure relief hole 24 to conduct the test again.

[0041] The pitch of the thread connecting the outer side of the connecting ring 16 to the connecting sleeve 8 is greater than the pitch of the thread connecting the inner side of the connecting ring 16 to the housing 20.

[0042] The explosion-proof enclosure 3 adopts an existing explosion-proof enclosure. The explosion-proof enclosure 3 is placed outside the explosion-proof container 2 and connected to the pressure relief base 1. A door 25 is installed on the top of the explosion-proof enclosure 3. The door 25 is an anti-theft door equipped with a combination lock. A square tube is fixedly installed on the explosion-proof enclosure 3 or the pressure relief base 1. The hollow inner cavity of the square tube serves as a forklift hole 26 to facilitate the handling of the invention by forklift.

[0043] Since the explosion-proof container 2 and the pressure relief base 1 are connected by a connecting ring 16 and a connecting sleeve 8, the explosion-proof container 2 can be removed from the pressure relief base 1 before filling with asbestos 13. It can be inserted into the pressure relief base 1 from the position of the connecting ring 16, which facilitates the anti-corrosion treatment and maintenance of the pressure relief base 1. At the same time, it also facilitates the welding of the inner side of the supporting round tube 11.

[0044] The second pressure relief hole 24 is located around the bottom of the housing 20, which can change the discharge direction of the shock wave through the pressure relief liner 19 to enhance the stability of the invention.

[0045] Based on the characteristics of the explosion-proof container, the explosion-proof container 2 can be made larger according to customer needs to increase the internal capacity of the explosion-proof container 2, so that more explosives can be placed inside the explosion-proof container 2.

[0046] The working principle of this invention is as follows:

[0047] When an explosion occurs inside the explosion-proof container 2, the shock wave generated by the explosion will directly act on the inner wall of the explosion-proof container 2 and the storage platform 15. Under the action of the shock wave, the storage platform 15 will deform downward and press on the upper pressure relief liner 19. The pressure relief liner 19 is fixed on the connecting ring 16 at the pressure relief port position, and the bottom of the pressure relief liner 19 is attached to the bottom of the connecting cavity 4. Therefore, the pressure relief liner 19 can support the storage platform 15 and prevent the storage platform 15 from being embedded in the pressure relief channel of the pressure relief base 1 under the action of the shock wave, thereby preventing the pressure relief performance of the pressure relief base 1 from being affected. The shock wave and flames generated by the explosion will instantly pass through the through holes on the pressure relief platform and enter the pressure relief liner 19 through the first pressure relief hole 27. They will then pass sequentially through the three first pressure relief chambers 22 within the pressure relief liner 19 and the through holes on the wave-damping plate 21, before entering the connecting cavity 4 within the pressure relief base 1 through the second pressure relief hole 24. Finally, they will pass through the third pressure relief hole 6 on the supporting circular tube 11 and enter the second pressure relief chamber 5, before being discharged to the outside through the third pressure relief hole 6 on the outer shell 12. The first pressure relief hole 27 experiences the greatest impact force during the passage of the shock wave through the pressure relief liner 19 because the diameters of the first pressure relief hole 27, the through holes on the wave-damping plate 21, and the second pressure relief hole 24 gradually increase, and the sum of the flow areas of all the first pressure relief holes 27, the sum of the flow areas of all the through holes on the wave-damping plate 21, and the sum of the flow areas of all the second pressure relief holes 24 gradually increase. This allows for a gradual increase in the discharge area. Shock waves, flames, and noise are fully relieved after passing through multiple first pressure relief chambers 22 in the pressure relief liner 19, the connecting chamber 4 on the pressure relief base 1, and the second pressure relief chamber 5. When finally discharged to the outside, it can achieve excellent pressure relief, flame suppression, and noise reduction, making the various performance indicators of the present invention even better.

[0048] The shock wave generated by the explosion, after being discharged into the connecting cavity 4 through the pressure relief liner 19, will cause the pressure relief liner 19 to tend to move upward. The pressure relief liner 19 is screwed to the connecting ring 16, and the connecting ring 16 is screwed to the connecting sleeve 8. The first limiting block 17 on the connecting sleeve 8 abuts against the top of the connecting cavity 4, preventing the pressure relief liner 19 from moving upward. Therefore, the function of the first limiting block 17 is to improve the internal structural stability of the invention. The second limiting block 18 serves to position the connecting ring 16 and the connecting sleeve 8, while the connecting sleeve 8 also supports the second limiting block 18. The cooperation of the connecting ring 16 and the connecting sleeve 8 also strengthens the pressure relief port of the explosion-proof container, preventing the pressure relief port from being torn open.

[0049] The pressure relief liner 19 of the present invention, by setting up a wave-damping plate 21 to separate multiple first pressure relief chambers 22, can improve the pressure relief and flame extinguishing performance of the pressure relief liner 19 and enhance the structural strength of the pressure relief liner 19. By setting a connecting rod 23 between the wave-damping plates 21, the overall structural strength of the pressure relief liner 19 can be further improved, the space of each first pressure relief chamber 22 in the pressure relief liner 19 can be maintained, and adjacent wave-damping plates 21 can be prevented from being squeezed together under the action of shock waves. It can also enable the pressure relief liner 19 to better support the storage platform 15.

[0050] During the entire depressurization process, the shock wave generated by the explosion will not enter the space between the explosion-proof container 2 and the explosion-proof enclosure 3. Therefore, the space between the explosion-proof container 2 and the explosion-proof enclosure 3 is very safe and will not generate high pressure.

[0051] The asbestos 13 provided has high fire resistance, electrical insulation and heat insulation properties, and the barrier layer 7 provided on the inner wall of the connecting cavity 4 has flame retardant, heat insulation and sound insulation functions. Therefore, the present invention also has certain fire resistance properties. Even if a fire occurs outside the present invention, the heat can be isolated by the asbestos 13 and the barrier layer 7, thereby improving the safety performance of the present invention.

[0052] The explosion-proof enclosure 3 of this invention can use existing explosion-proof enclosures, thus retaining the anti-theft and other functions of existing explosion-proof enclosures. The explosion-proof container 2 gives this invention excellent explosion-proof performance. At the same time, by setting up the pressure relief liner 19, pressure relief base 1, asbestos 13, and barrier layer 7, this invention can achieve excellent pressure relief, flame extinguishing, sound silencing, heat insulation, and fire resistance effects.

[0053] It should be understood that in the claims and description of this invention, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0054] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An explosion-proof box with excellent explosion-proof performance, characterized in that, Includes pressure relief base, explosion-proof container, and explosion-proof enclosure; The pressure relief base is provided with a pressure relief channel that communicates with the outside of the pressure relief base. The pressure relief channel includes a connecting cavity and at least one second pressure relief cavity. The second pressure relief cavity and the connecting cavity, and the outer wall of the pressure relief base and the second pressure relief cavity are respectively connected by a third pressure relief hole. The inner wall of the connecting cavity is provided with a barrier layer with flame retardant, heat insulation and sound insulation functions. The barrier layer is provided with a through hole corresponding to the third pressure relief hole. The explosion-proof container is fixedly mounted on the pressure relief base. Asbestos is filled between the outer wall of the explosion-proof container and the inner wall of the explosion-proof box. The explosion-proof container has an opening and an explosion-proof cover that can seal the opening. Inside the explosion-proof container is a storage platform with distributed through holes. A pressure relief port is located at the bottom of the explosion-proof container, and a pressure relief liner is installed inside the pressure relief port. The upper end of the pressure relief liner extends into the explosion-proof container and is located below the storage platform. The lower end of the pressure relief liner extends into the connecting cavity and is close to or attached to the bottom of the connecting cavity. The pressure relief liner is activated when the storage platform deforms. It can be used to support the storage platform; the pressure relief liner includes a hollow shell, and at least two horizontally arranged wave-damping plates are fixed inside the shell. The wave-damping plates divide the inner cavity of the shell into multiple longitudinally distributed first pressure relief chambers. Through holes are distributed on the wave-damping plates, and adjacent first pressure relief chambers are connected through the through holes on the wave-damping plates. The shell is provided with a first pressure relief hole that connects the uppermost first pressure relief chamber to the inner cavity of the explosion-proof container, and a second pressure relief hole that connects the lowermost first pressure relief chamber to the connecting cavity. The explosion-proof enclosure is installed outside the explosion-proof container and connected to the pressure relief base. The explosion-proof enclosure is equipped with a door.

2. The explosion-proof box with excellent explosion-proof performance according to claim 1, characterized in that, A connecting sleeve is fixedly provided on the pressure relief base, and a connecting ring is fixedly provided at the pressure relief port of the explosion-proof container. The connecting ring is fitted into the connecting sleeve and screwed to the connecting sleeve. A first limiting block is fixedly provided on the outer wall of the connecting sleeve and fits against the top of the connecting cavity. A second limiting block is fixedly provided on the outer wall of the connecting ring and fits against the upper end of the connecting sleeve. The pressure relief inner liner is fitted into the connecting ring and the outer wall of the shell is screwed to the inner wall of the connecting ring.

3. The explosion-proof box with excellent explosion-proof performance according to claim 2, characterized in that, The pitch of the thread connecting the outer side of the connecting ring to the connecting sleeve is greater than the pitch of the thread connecting the inner side of the connecting ring to the housing.

4. The explosion-proof box with excellent explosion-proof performance according to claim 1, characterized in that, The diameters of the first pressure relief hole, the through hole on the wave-damping plate, and the second pressure relief hole gradually increase, and the sum of the flow areas of all the first pressure relief holes, the sum of the flow areas of all the through holes on the wave-damping plate, and the sum of the flow areas of all the second pressure relief holes gradually increase.

5. The explosion-proof box with excellent explosion-proof performance according to claim 4, characterized in that, A connecting rod is fixed between adjacent wave-damping plates, and the end of the connecting rod is screwed to the corresponding wave-damping plate.

6. The explosion-proof box with excellent explosion-proof performance according to claim 1, characterized in that, The upper and lower surfaces of the shell are both spherical, while the middle part of the shell is an annular structure.

7. The explosion-proof box with excellent explosion-proof performance according to claim 1, characterized in that, The pressure relief base includes a top plate and a bottom plate. A supporting circular tube and a shell are fixedly provided between the bottom plate and the top plate. The supporting circular ring is located inside the shell. The inner cavity of the supporting circular tube serves as the connecting cavity. The space between the shell and the supporting circular tube serves as the second pressure relief cavity. The supporting circular tube and the shell are both provided with the third pressure relief hole.

8. The explosion-proof box with excellent explosion-proof performance according to claim 1, characterized in that, The cabinet door is a security door equipped with a combination lock.

9. The explosion-proof box with excellent explosion-proof performance according to claim 1, characterized in that, The second pressure relief holes are evenly distributed around the bottom of the housing.

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