A stainless steel explosion-proof box for extreme environments and its production process

Abstract

The invention discloses a stainless steel explosion-proof box for extreme environments and a production process method thereof. The temperature range is large. By adopting high-quality silicone sealing pads, the explosion-proof box can meet the use requirements of most regions and special circumstances in the world, and the protection level is high. By adopting a flat sealing structure and a special pasting and joint splicing process of the sealing pad, the high protection requirement of IP68 can be met, and the corrosion resistance is good. By adopting high-quality 316L stainless steel, the requirements of a strong corrosive environment can be met. The welding reliability is high. By adopting a robot automatic welding process, the stability, consistency and aesthetics of the welding are effectively guaranteed, and the structural deformation is small. By adopting a sandblasting process to remove welding stress, the stability of the protection is effectively guaranteed. The box cover can be limited at any angle by adopting a stepless limiting support rod, which effectively avoids injuries to personnel when the box cover is suddenly closed. By arranging a buffer pad on the box cover to protect the sealing pad, the sealing pad can be effectively prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-high temperature, ultra-low temperature, high protection, strong corrosion outdoor and marine environments in explosion-proof areas (inflammable and explosive dangerous places), and specifically to a stainless steel explosion-proof box for extreme environments and a production process method thereof. Background Art

[0002] In explosion-proof areas (flammable and explosive hazardous places) with ultra-high temperature, ultra-low temperature, high protection, strong corrosion outdoor and marine environments, a stainless steel explosion-proof box is needed.

[0003] The main conditions of the existing stainless steel explosion-proof boxes are: the maximum applicable temperature range is -40℃~120℃, mainly because the sealing gasket material is foamed polyurethane or EPDM, and the maximum tolerance temperature range of this material is only -40℃~120℃; the protection level is IP65, mainly because the sealing method adopts a linear structure seal, the disadvantage of this structure is that the bonding area between the sealing surface and the sealing gasket is very small after being pressed, so the sealing performance is not high; it can only be used in WF1 moderate corrosion environment, mainly because the box body and the box cover are made of 304 stainless steel; after the box cover is opened, only one opening and closing angle can be limited and fixed, mainly because the support rod can only be stuck in the groove for limit fixation after the box cover is opened to a certain angle, if the box cover is opened to other angles, the support rod cannot be stuck in the groove for limit fixation. In general, the existing stainless steel explosion-proof boxes have the disadvantages of small applicable temperature range, low protection level, poor corrosion resistance, and only one limit angle for the box cover.

[0004] In view of the above problems, in order to increase the applicable temperature range, improve the protection level and improve the corrosion resistance, the present invention proposes a stainless steel explosion-proof box for extreme environments and a production process method thereof. Summary of the invention

[0005] The purpose of the present invention is to provide a stainless steel explosion-proof box for extreme environments and a production process method thereof, which has the advantages of a wide applicable temperature range, a high protection level and good corrosion resistance, high welding stability, the box cover can be limited at any angle when opened, and a buffer pad can protect the sealing pad and the sealing plane, thereby solving the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stainless steel explosion-proof box for extreme environments, wherein the end face of the box body is welded with studs, the box cover is fixed to the box body by screws, a limit block is provided at the upper end of the screw, a sealing gasket is pasted inside the box cover and the box body and the box cover are connected through a sealing plane, the box cover is provided with a stepless limit support rod, the positioning knob is arranged at the top end of the sliding rod, the sliding rod is fixed to the box cover through a lock nut, the positioning slide rail is fixed to the box body through a lock nut, a silicone buffer block is respectively arranged on the two edges adjacent to the hinge on the box cover, a fixing groove is arranged at one end of the buffer block, the buffer block is arranged on the side of the sealing plane, the sealing gaskets are all bonded to form a joint, the upper hinge is welded to the box cover, the lower hinge is welded to the box body, the inner hole of the lower hinge is set as a U-shaped hole, one end face of the upper hinge and the lower hinge is set as a finely machined surface, and the rotating shaft is provided with an elastic retaining spring for the shaft.

[0007] Furthermore, the sealing gasket is made of silicone material and is used in an environment with a temperature of -60°C to 250°C and a humidity of 95%.

[0008] Furthermore, the inner hole of the upper hinge is a round hole, the inner hole of the lower hinge is a U-shaped hole, the rotating shaft passes through the inner holes of the upper hinge and the lower hinge, and is fixed with an elastic retaining spring for the shaft.

[0009] Furthermore, the buffer pad is made of high-quality silicone and has a dumbbell shape.

[0010] Furthermore, the box body and the box cover are made of high-quality 316L stainless steel.

[0011] A stainless steel explosion-proof box for extreme environments and a production process method thereof, characterized in that:

[0012] Step 1: Through testing and comparison, the sealing pad is made of foamed silicone, the length is cut according to the size of the box, the maximum compression is 60%, the Shore hardness is 10~15 degrees, and there is no adhesive on both sides;

[0013] Step 2: The sealing method uses a plane structure for sealing. The end face of the box is welded with a 15mm high stud using the energy storage welding process. The stud is provided with an M5 internal thread. The maximum spacing between two studs on the same side of the box is 400mm. The top of the box is bent outward 90 degrees to form a plane as a sealing plane. The box cover is fixed to the box with M5 screws. The M5 screws are installed on the box studs and tightened. A limit block is provided on the M5 screws. At this time, tightening the M5 screws will not further compress the gasket, which can effectively prevent the gasket from being over-compressed and damaged. The limit block is provided with an M5 internal thread, which has the function of preventing it from falling off. When the box cover is opened, it can effectively prevent the M5 screws and limit blocks from falling off.

[0014] Step 3: The sealing gasket adopts a special pasting process and joint splicing process. The inner surface of the box cover is wiped with 99% industrial alcohol. The minimum width of the wipe is 35mm. After all four sealing gaskets are bonded, there are 4 joints in total. One hand will forcefully separate the gaps of the joints of the two adjacent sealing gaskets, and then use the other hand to slowly squeeze the bottled glue into the gap from the bottom of the sealing gasket until the gap is completely filled with glue, then relax your hand, and then wipe the glue overflowing from the gap clean. Do not press the sealing gasket when wiping, and then place it at room temperature for 4 hours to solidify the glue. If the room temperature is lower than 5℃, it needs to be placed for 8 hours;

[0015] Step 4: The box body and the box cover are made of high-quality 316L stainless steel and are welded by robot. The box body and the box cover need to be clamped and fixed by special tooling, and robot automatic welding is adopted;

[0016] Step 5: Sandblasting is used inside the explosion-proof box to remove welding stress. After the box body and box cover are welded, sandblasting with steel balls with a diameter of 0.2mm is used inside to remove welding stress.

[0017] Step 6: Use energy storage welding to weld one M5 screw inside the box cover, and use energy storage welding to weld two M5 screws on the end face of the box body. Then use M5 anti-loosening nuts to fix the sliding rod of the stepless limit support rod to the box cover, and use M5 anti-loosening nuts to fix the positioning rail to the box body. After opening the box cover, lock the positioning knob of the stepless limit support rod to limit the position.

[0018] Step 7: The box cover uses a buffer block to protect the sealing pad and the sealing plane. A silicone buffer block is set on each of the two sides adjacent to the hinge on the box cover. One end of the silicone buffer block has a 1mm wide fixing groove, which is fixed to the box cover through the fixing groove and using the elasticity of the silicone. If the side length of the box cover is greater than 600mm, a buffer block needs to be added in the middle of each of the two sides, and a buffer block is also set on the opposite side of the hinge;

[0019] Step 8: The hinge is fixed by welding. The hinge is divided into an upper hinge and a lower hinge. One end face of the upper hinge and the lower hinge needs to be finely processed. The two upper hinges are fixed on the left and right ends of the special welding tooling, and the finely processed end faces are in relative directions. The spacing adjustment accuracy of the two upper hinges is set to 0.2mm. Then the two upper hinges are fixed at the specified positions on the box cover by special tooling, and then the upper hinges are welded to the box cover by argon arc welding. According to the above method, the two lower hinges are welded to the specified positions on the box body, and the rotating shaft passes through the inner holes of the upper hinge and the lower hinge, and is fixed with an elastic retaining ring for the shaft. Tighten the M5 screws of the box cover, and the sealing gasket is gradually compressed. The box cover and the rotating shaft will move together along the radial direction of the U-shaped hole of the lower hinge.

[0020] Furthermore, the glue-pasted sealing gasket uses a silicone plate with a width of 30mm and a thickness of 10mm immersed in slow-drying glue, and then one side of the silicone plate is fitted with the side wall of one edge of the inner surface of the box cover, and then the brush is brushed from one end to the other end at a uniform speed, and the cut sealing gasket is pasted on the position where the glue has just been brushed. When pasting, one end of the sealing gasket needs to be fitted with the side wall of one end of the inner surface of the box cover, and then a silicone plate without glue is pressed to the other end at a uniform speed, and then the sealing gasket on the opposite side is pasted in the same way, and the sealing gaskets on the remaining two edges are pasted according to the above method. The length of the sealing gasket needs to be 1mm longer than the spacing of the pasted sealing gaskets. The sealing gasket is elastic and can be pressed into the spacing of the pasted sealing gaskets. Because slow-drying glue is used, if the sealing gasket is not pasted neatly, it can be torn off and re-pasted according to the above method; if the sealing strip is torn off twice, the glue needs to be brushed again according to the above method, and then the sealing gasket is pasted according to the above method.

[0021] Furthermore, the sealing gasket can be used in an environment with a temperature of -60°C to 250°C and a humidity of 95%, with a natural thickness of 8mm and a width of 20mm, and the sealing plane width is set to 8mm.

[0022] Furthermore, the buffer pad is made of high-quality silicone, has a height of 12 mm, a compression amount of 6 mm, and a dumbbell shape.

[0023] Furthermore, the inner hole of the upper hinge is a round hole, and the inner hole of the lower hinge is a U-shaped hole.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention proposes a stainless steel explosion-proof box for extreme environments and a production process method thereof, which has a wide temperature range. By using high-quality silicone sealing pads, the applicable ambient temperature and humidity ranges of the explosion-proof box are -60°C to 250°C and 95% humidity, respectively, which can meet the use requirements of most regions and special circumstances in the world.

[0026] 2. The present invention proposes a stainless steel explosion-proof box for extreme environments and a production process method thereof, which has a high protection level. By adopting a flat sealing structure, a special sealing gasket bonding and a joint splicing process, it can meet the high protection requirements of IP68 level and can be applied to offshore drilling platforms, ocean tankers and ships with very high requirements for protection levels.

[0027] 3. The stainless steel explosion-proof box for extreme environments and its production process method proposed by the present invention have good corrosion resistance and can meet the requirements of WF2 outdoor strong corrosion environment and CM-5 marine strong corrosion environment by adopting high-quality 316L stainless steel.

[0028] 4. The present invention proposes a stainless steel explosion-proof box for extreme environments and a production process method thereof, which has high welding reliability and effectively ensures the stability, consistency and aesthetics of welding by adopting a robot automatic welding process.

[0029] 5. The present invention proposes a stainless steel explosion-proof box for extreme environments and a production process method thereof, which has small structural deformation. By adopting a sandblasting process to remove welding stress, the deformation of the sealing plane of the box is less than 0.2 mm during long-term use, effectively ensuring the stability of protection.

[0030] 6. The present invention proposes a stainless steel explosion-proof box for extreme environments and a production process method thereof. The box cover can be limited at any angle, and the box cover can be limited at any angle after opening by using a stepless limit support rod. Because the box cover can be opened at different angles due to the influence of the surrounding installed equipment at different construction sites, the box cover can be limited at any angle according to the actual situation to ensure construction safety and effectively avoid injuries to personnel when the box cover is suddenly closed.

[0031] 7. The stainless steel explosion-proof box for extreme environments and its production process method proposed by the present invention have a sealing gasket damage prevention measure. By arranging a buffer pad on the box cover to protect the sealing gasket, the sealing gasket can be effectively prevented from being damaged. When the box cover is suddenly closed, it will cause a large instantaneous impact on the sealing gasket and the sealing plane, which is easy to cause the seal to be damaged or the sealing plane to be deformed, thereby causing the seal to fail.

[0032] 8. The present invention proposes a stainless steel explosion-proof box for extreme environments and a production process method thereof, which has high welding precision. By adopting a special tooling for welding hinges, the welding position precision is effectively guaranteed to be controlled within the range of 0.2mm, thereby effectively replacing the method of machining screw holes and fixing hinges with screws, effectively avoiding water leakage at the screw holes, thereby effectively ensuring the sealing of the explosion-proof box. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 A top view of the present invention;

[0035] Figure 3 It is a partial cross-sectional view of the present invention.

[0036] In the figure: 1. box body; 2. stud; 3. limit block; 4. screw; 5. box cover; 6. positioning knob; 7. sliding rod; 8. positioning rail; 9. screw; 10. anti-loosening nut; 11. U-shaped hole; 12. round hole; 13. rotating shaft; 14. end face; 15. upper hinge; 16. lower hinge; 17. elastic retaining ring; 18. joint; 19. sealing plane; 20. sealing gasket; 21. buffer block; 22. fixing groove. DETAILED DESCRIPTION

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

[0038] Embodiment 1:

[0039] like Figure 1-3 As shown, in this embodiment, the box body 1 is arranged below the box cover 5, and the box body 1 and the box cover 5 are fixed together by using screws 4. A limit block 3 is arranged on the upper end of the screw 4. The sealing gasket 20 is pasted inside the box cover 5 and connects the box body 1 and the box cover 5 through the sealing plane 19. The box cover 5 is provided with a stepless limiting support rod, and the buffer pad block 21 is arranged at the side end of the sealing plane 19. The sealing gasket 20 is made of silicone material. By adopting high-quality silicone sealing gaskets 20, the explosion-proof box can meet the use requirements of most regions and special circumstances in the world. The upper hinge 15 is welded on the box cover 5, and the lower hinge 16 is welded on the box body 1. The inner hole of the lower hinge 16 is set as a U-shaped hole 11, and the rotating shaft 13 is provided with an elastic retaining spring 17.

[0040] Embodiment 2:

[0041] Through testing and comparison in this embodiment, the sealing gasket 20 adopts foamed silica gel, which has the characteristics of non-water absorption, wide temperature resistance and high compression ratio. It is used in an environment with a temperature of -60°C to 250°C and a humidity of 95%. The natural thickness is 8mm, the width is 20mm, and the length is cut according to the size of the box 1. The maximum compression is 60%, the Shore hardness is 10 to 15 degrees, and there is no adhesive on both sides. The sealing method adopts a flat structure for sealing. The end face of the box 1 is welded with a 15mm high stud 2 by a storage welding process. The stud 2 is provided with an M5 internal thread. The maximum spacing between the two studs 2 on the same side of the box 1 is 400mm. The top of the box 1 is facing outward. Bend 90 degrees to form a plane as the sealing plane 19, the width of the sealing plane 19 is set to 8mm, use M5 screws 4 to fix the box cover 5 on the box body 1, install the M5 screws 4 on the studs of the box body 1 and tighten them, and a limit block 3 is provided on the M5 screws 4. The sealing gasket 20 adopts a special pasting process and joint splicing process. The inner surface of the box cover 1 is wiped with 99% industrial alcohol. The minimum width of the wipe is 35mm. The glue pasting sealing gasket 20 adopts a silicone plate with a width of 30mm and a thickness of 10mm immersed in slow-drying glue, and then one side of the silicone plate is connected to the side of one edge of the inner surface of the box cover 5. When pasting, one end of the sealing gasket 20 needs to be in contact with the side wall of one end of the inner surface of the box cover 1, and then a silicone plate without glue is used to press it to the other end at a uniform speed, and then the sealing gasket 20 on the opposite side is pasted in the same way. The sealing gasket 20 on the remaining two sides is pasted according to the above method. The length of the sealing gasket 20 needs to be 1mm longer than the spacing of the pasted sealing gaskets 20. The sealing gasket 20 is elastic and can be pressed into the spacing of the pasted sealing gaskets 20. Because slow-drying glue is used, if the sealing gasket 20 is not pasted neatly, Tear it off and re-paste it according to the above method. If the sealing strip is torn off twice, it is necessary to apply glue again according to the above method, and then paste the sealing gasket 20 according to the above method. After all four sealing gaskets 20 are bonded, there are 4 joints 18 in total. Use one hand to forcefully separate the gaps at the joints of two adjacent sealing gaskets 20, and then use the other hand to slowly squeeze the bottled glue into the gap from the bottom of the sealing gasket 20 until the gap is completely filled with glue and then release your hand, and then wipe the glue overflowing from the gap clean. Do not press the sealing gasket 20 when wiping, and then leave it at room temperature for 4 hours to allow the glue to solidify. If the room temperature is below 5°C, it needs to be left for 8 hours.The sealing method adopts a plane structure for sealing. The top of the box body 1 is bent outward by 90 degrees to form a plane as the sealing plane 19, and the width is set to 8mm. The width of the sealing gasket 20 combined with the sealing plane 19 is 8mm. When the M5 screw 4 fixing the box cover 5 is tightened, the sealing gasket is compressed by 4mm. Since there is a limit block 3 on the screw 4, the sealing gasket 20 will not be further compressed even if the screw 4 is tightened again, which can effectively prevent the sealing gasket from being over-compressed and damaged. The limit block 3 is provided with an M5 internal thread, which has the function of preventing falling off. When the box cover is opened, the screw 4 and the limit block 5 can be effectively prevented from falling off. The maximum spacing between the two screws 4 on the same side of the box cover 1 is 400mm, thereby ensuring that the explosion-proof box has a high protection level and can meet the high protection requirements of IP68 level. It can be used in offshore drilling platforms, ocean tankers and ships with high requirements for protection levels.

[0042] Embodiment three:

[0043] In this embodiment, the box body 1 and the box cover 5 are made of high-quality 316L stainless steel and are welded using a robot automatic welding process. When welding the box body 1 and the box cover 5, special tooling is required to clamp and fix them. Robot automatic welding is used. By using high-quality 316L stainless steel, the requirements of the WF2 outdoor strong corrosion environment and the CM-5 marine strong corrosion environment can be met, so the corrosion resistance is good.

[0044] Embodiment 4:

[0045] In this embodiment, a sandblasting process is used inside the explosion-proof box to remove welding stress, and the welding reliability is high. By adopting a robot automatic welding process, the stability, consistency and aesthetics of the welding are effectively guaranteed. After the box body 1 and the box cover 5 are welded, a sandblasting process with a steel ball with a diameter of 0.2mm is used inside to remove the welding stress. By adopting the sandblasting process to remove the welding stress, the deformation of the sealing plane 19 of the box body 1 is less than 0.2mm during long-term use, which effectively ensures the stability of the protection.

[0046] Embodiment five:

[0047] In this embodiment, an M5 screw rod 9 is welded inside the box cover 5 by using the energy storage welding process, and two M5 screw rods 9 are welded on the end face of the box body 1 by using the energy storage welding process. Then, the sliding rod 7 of the stepless limiting support rod is fixed to the box cover 5 by using the M5 anti-loosening nut 10, and the positioning slide rail 8 is fixed to the box body 1 by using the M5 anti-loosening nut 10. After opening the box cover 5, the positioning knob 6 of the stepless limiting support rod is locked for limiting. The box cover 1 can be limited at any angle. The stepless limiting support rod is used to achieve limiting at any angle after the box cover 5 is opened. Because the box cover 5 can be opened at different angles at different construction sites due to the influence of the surrounding installed equipment, the box cover 5 can be limited at any angle according to the actual situation, thereby ensuring construction safety and effectively avoiding injuries to personnel when the box cover 5 is suddenly closed.

[0048] Embodiment six:

[0049] In this embodiment, the box cover 5 adopts a buffer pad 21 to protect the sealing gasket 20 and the sealing plane 19. A silicone buffer pad 21 is set on each of the two sides adjacent to the hinge on the box cover 5. The buffer pad 21 is made of high-quality silicone, has a height of 12mm, a compression amount of 6mm, and a dumbbell shape. One end of the buffer pad 21 is provided with a fixed groove 22 with a width of 1mm. It is fixed to the box cover 5 through this fixed groove and by utilizing the elasticity of silicone. If the side length of the box cover 5 is greater than 600mm, a buffer pad 21 needs to be added in the middle of each of the two sides. At the same time, a buffer pad 21 is also set on the opposite side of the hinge. The sealing gasket has an anti-damage measure. By setting a buffer pad on the box cover to protect the sealing gasket, this measure can effectively prevent the sealing gasket from being damaged. When the box cover is suddenly closed, it will cause a large instantaneous impact on the sealing gasket and the sealing plane, which is likely to cause damage to the seal or deformation of the sealing plane, thereby causing failure of the seal.

[0050] Embodiment seven:

[0051] In this embodiment, the hinge is fixed by welding. The hinge is divided into an upper hinge 15 and a lower hinge 16. The inner hole of the upper hinge 15 is a round hole 12, and the inner hole of the lower hinge 16 is a U-shaped hole 11. One end surface 14 of the upper hinge 15 and the lower hinge 16 needs to be finely processed. The two upper hinges 15 are respectively fixed on the left and right ends of the special welding tooling, and the finely processed end surfaces 14 are in opposite directions. The spacing adjustment accuracy of the two upper hinges 15 is set to 0.2mm, and then The two upper hinges 15 are fixed to the designated positions on the box cover 5 by special tooling, and then the upper hinges are welded to the box cover by argon arc welding. The two lower hinges 16 are welded to the designated positions on the box body 1 according to the above method. The rotating shaft 13 is passed through the inner holes of the upper hinge 15 and the lower hinge 16, and is fixed by the shaft elastic retaining ring 17. The M5 screws 4 of the box cover 5 are tightened, and the sealing gasket 20 is gradually compressed. The box cover 5 and the rotating shaft 13 will move together along the radial direction of the U-shaped hole 11 of the lower hinge 16. By using a special tooling for welding hinges, high welding accuracy is ensured, and the welding position accuracy is effectively controlled within the range of 0.2mm, thereby effectively replacing the method of fixing the hinges with screws by machining screw holes, effectively avoiding water leakage at the screw holes, and effectively ensuring the sealing of the explosion-proof box.

[0052] In summary: the present invention proposes a stainless steel explosion-proof box for extreme environments and its production process method, which has a wide temperature range. By adopting high-quality silicone sealing gaskets, the explosion-proof box can be used in an ambient temperature of -60°C~250°C and a humidity of 95%, which can meet the use requirements of most regions and special situations in the world, and has a high protection level. By adopting a flat sealing structure and a special pasting and joint splicing process of the sealing gasket, the high protection requirements of IP68 can be met, and it can be applied to offshore drilling platforms, ocean tankers and ships with very high requirements for protection levels. It has good corrosion resistance and can meet the requirements of WF2 outdoor strong corrosion environment and CM-5 marine strong corrosion environment by adopting high-quality 316L stainless steel. The welding reliability is high, and the robot automatic welding process is adopted to effectively ensure the stability, consistency and aesthetics of the welding, and the structural deformation is small. By adopting the sandblasting process to remove the welding stress, the deformation of the sealing plane of the box body is less than 0.2mm during long-term use, which effectively ensures protection The stability of the box cover can be limited at any angle. The stepless limiting support rod is used to limit the box cover at any angle after it is opened. Because the box cover can be opened at different angles due to the influence of the surrounding installed equipment at different construction sites, the box cover can be limited at any angle according to the actual situation, so as to ensure the construction safety and effectively avoid the injury to personnel when the box cover is suddenly closed. It has a sealing gasket damage prevention measure. By setting a buffer pad on the box cover to protect the sealing gasket, it can effectively prevent the sealing gasket from being damaged. When the box cover is suddenly closed, it will cause a great instantaneous impact on the sealing gasket and the sealing plane, which may easily cause the seal to be damaged or the sealing plane to be deformed, thereby causing the seal to fail. The welding precision is high. By adopting a special tooling for welding hinges, the welding position accuracy is effectively guaranteed to be controlled within the range of 0.2mm, thereby effectively replacing the method of fixing the hinge with screws by processing screw holes, effectively avoiding water leakage at the screw holes, thereby effectively ensuring the sealing of the explosion-proof box.

[0053] It should be noted that, in this article, distinctions such as first and second, etc., do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article, or device.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stainless steel explosion-proof box for use in extreme environments, comprising a box body (1), characterized in that: The end surface of the box body (1) is welded with a stud (2), and the box cover (5) is fixed to the box body (1) by a screw (4). A limit block (3) is arranged on the upper end of the screw (4), and the limit block (3) is provided with an internal thread. The sealing gasket (20) is pasted inside the box cover (5) and the box body (1) and the box cover (5) are connected through a sealing plane (19). The box cover (5) is provided with a stepless limit support rod, and a positioning knob (6) is arranged at the top end of a sliding rod (7). The sliding rod (7) is fixed to the box cover (5) by a locking nut (10). The positioning slide rail (8) is fixed to the box body (1) by a locking nut (10). The screw (9) is welded to the box cover (5). The interior and the end surface of the box body (1) are provided with a silicone cushion block (21) on each of the two sides adjacent to the hinge on the box cover (5), a fixing groove (22) is provided at one end of the cushion block (21), the cushion block (21) is provided on the side of the sealing plane (19), and the sealing gasket (20) is all bonded to form a joint (18), the upper hinge (15) is welded to the box cover (5), the lower hinge (16) is welded to the box body (1), the inner hole of the lower hinge (16) is set as a U-shaped hole (11), one end surface of the upper hinge (15) and the lower hinge (16) is set as a precision-machined end surface (14), and the rotating shaft (13) is provided with a shaft elastic retaining spring (17).

2. The stainless steel explosion-proof box for extreme environments according to claim 1, characterized in that: The sealing gasket (20) is made of silica gel material and is used in an environment with a temperature of -60°C to 250°C and a humidity of 95%.

3. The stainless steel explosion-proof box for extreme environments according to claim 1, characterized in that: The inner hole of the upper hinge (15) is a circular hole (12), the inner hole of the lower hinge (16) is a U-shaped hole (11), the rotating shaft (13) passes through the inner holes of the upper hinge (15) and the lower hinge (16), and is fixed by an elastic retaining spring (17) for the shaft.

4. The stainless steel explosion-proof box for extreme environments according to claim 1, characterized in that: The buffer pad (21) is made of silica gel and has a dumbbell shape.

5. The stainless steel explosion-proof box for extreme environments according to claim 1, characterized in that: The box body (1) and the box cover (5) are made of 316L stainless steel.

6. A production process for a stainless steel explosion-proof box for extreme environments as claimed in any one of claims 1 to 5, characterized in that: Step 1: Through testing and comparison, the sealing gasket (20) is made of foamed silicone, the length is cut according to the size of the box, the maximum compression is 60%, the Shore hardness is 10-15 degrees, and there is no adhesive on both sides; Step 2: The sealing method adopts a plane structure for sealing. A stud (2) with a height of 15 mm is welded on the end surface of the box body (1) by energy storage welding. The stud (2) is provided with an M5 internal thread. The maximum spacing between two studs (2) on the same side of the box body (1) is 400 mm. The top of the box body (1) is bent outward by 90 degrees to form a plane as a sealing plane (19). The box cover (5) is fixed to the box body (1) by an M5 screw (4). The M5 screw (4) is installed on the stud (2) of the box body (1) and tightened. A stop block (3) is provided on the M5 screw (4); Step 3: The sealing gasket (20) is made by pasting and joint splicing. The inner surface of the box cover (5) is wiped clean with 99% industrial alcohol. The minimum width of the wipe is 35 mm. After all four sealing gaskets (20) are bonded, there are 4 joints (18). One hand is used to forcefully separate the gaps between the joints (18) of two adjacent sealing gaskets (20). Then, with the other hand, the bottled glue is slowly squeezed into the gap from the bottom of the sealing gasket (20). After the gap is completely filled with glue, the hand is released. Then, the glue overflowing from the gap is wiped clean. The sealing gasket (20) cannot be pressed during wiping. Then, the glue is placed in a room temperature environment for 4 hours to solidify the glue. If the room temperature is lower than 5°C, it needs to be placed for 8 hours. Step 4: The box body (1) and the box cover (5) are made of 316L stainless steel and are welded by a robot. The box body (1) and the box cover (5) are welded by special tooling and clamped. Robotic automatic welding is used. Step 5: After the welding of the box body (1) and the box cover (5) is completed, the welding stress is removed by sandblasting inside the explosion-proof box; Step 6: Weld one M5 screw (9) inside the box cover (5) by using the energy storage welding process, and weld two M5 screws (9) on the end surface of the box body (1) by using the energy storage welding process, then fix the sliding rod (7) of the stepless limit support rod to the box cover (5) by using the M5 anti-loosening nut (10), and fix the positioning slide rail (8) to the box body (1) by using the M5 anti-loosening nut (10), open the box cover (5), and lock the positioning knob (6) of the stepless limit support rod to limit the position; Step 7: The box cover (5) uses a buffer pad (21) to protect the sealing pad (20) and the sealing plane (19). A silicone buffer pad (21) is provided on each of the two sides of the box cover (5) adjacent to the hinge. A fixing groove (22) with a width of 1 mm is provided at one end of the buffer pad (21). The buffer pad (21) is fixed to the box cover (5) through the fixing groove (22) and by utilizing the elasticity of the silicone. If the side length of the box cover (5) is greater than 600 mm, one buffer pad (21) needs to be added at the middle position of each of the two sides, and a buffer pad (21) is also provided on the opposite side of the hinge. Step 8: The hinge is fixed by welding. The hinge is divided into an upper hinge (15) and a lower hinge (16). One end surface (14) of the upper hinge (15) and the lower hinge (16) needs to be finely processed. The two upper hinges (15) are respectively fixed on the left and right ends of the special welding tool, and the finely processed end surfaces (14) are in opposite directions. The spacing adjustment accuracy of the two upper hinges (15) is set to 0.2mm. Then, the two upper hinges are fixed to the specified positions on the box cover (5) by the special tool, and then The upper hinge (15) is welded to the box cover (5) by argon arc welding, and the two lower hinges (16) are welded to the specified positions on the box body (1) according to the above welding method. The rotating shaft (13) passes through the inner holes of the upper hinge (15) and the lower hinge (16), and is fixed by an elastic retaining ring (17) for the shaft. The M5 screw (4) of the box cover (5) is tightened, and the sealing gasket (20) is gradually compressed. The box cover (5) and the rotating shaft (13) will move together along the radial direction of the U-shaped hole (11) of the lower hinge (16).

7. The production process according to claim 6, characterized in that: The glue-pasting sealing gasket (20) is made by immersing a silicone plate with a width of 30 mm and a thickness of 10 mm in slow-drying glue, and then a side of the silicone plate is fitted with a side wall of one side of the inner surface of the box cover (5), and then brushing from one end to the other end at a uniform speed, and pasting the cut sealing gasket (20) on the position where the glue has just been brushed. When pasting, one end of the sealing gasket (20) needs to be fitted with a side wall of one end of the inner surface of the box cover (5), and then a silicone plate without glue is pressed at a uniform speed to the other end, and then the sealing gasket (20) on the opposite side is pasted in the same way. 0), the sealing gaskets (20) of the remaining two edges are pasted according to the above-mentioned pasting method. The length of the sealing gasket (20) needs to be 1 mm longer than the spacing of the pasted sealing gaskets (20). The sealing gasket (20) is elastic and can be pressed into the spacing of the pasted sealing gaskets (20). Because a slow-drying glue is used, if the sealing gasket (20) is not pasted neatly, it can be torn off and pasted again according to the above-mentioned pasting method; if the sealing gasket (20) is torn off twice, the glue needs to be brushed again according to the above-mentioned glue brushing method, and then the sealing gasket (20) is pasted according to the above-mentioned pasting method.

8. The production process according to claim 6, characterized in that: The sealing gasket (20) is used in an environment with a temperature of -60°C to 250°C and a humidity of 95%, has a natural thickness of 8 mm and a width of 20 mm, and the width of the sealing plane (19) is set to 8 mm.

9. The production process according to claim 6, characterized in that: The buffer pad (21) is made of silica gel, has a height of 12 mm, a compression amount of 6 mm, and a dumbbell shape.

10. The production process according to claim 6, characterized in that: The inner hole of the upper hinge is a circular hole (12), and the inner hole of the lower hinge is a U-shaped hole (11).

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