An explosion-proof rolling door with self-locking function

Abstract

The utility model discloses a kind of anti-explosion roller shutter door with self-locking function, belong to anti-explosion equipment technical field, including door frame, roller shutter door main body and drive assembly, door frame is square frame body structure, top rotatably connected with reel, roller shutter door main body is connected with reel, drive assembly is installed on the outer side wall of door frame top, drive assembly is used to drive reel rotation.Solved in prior art due to traditional roller shutter door under the action of explosion impact or external vibration, displacement is prone to occur and roller shutter door will produce friction with guide rail in lifting process, and the problems caused by the failure of sealing performance, the reduction of explosion-proof effect and the risk of becoming ignition source.The utility model has the dual ability of active prevention spark and passive resistance explosion impact, significantly improves its safety in combustible dust environment.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof equipment technology, specifically to an explosion-proof roller shutter door with a self-locking function. Background Technology

[0002] Roller shutters are a common building component, typically composed of multiple interconnected curtain panels. They are raised and lowered by rotating a roller, and are widely used in industrial plants, warehouses, garages, and other similar settings. They are characterized by their small footprint, convenient operation, and strong area isolation capabilities. In the industrial sector, roller shutters not only serve as access control but also need to meet safety requirements such as fire prevention, theft prevention, and area separation, making them an important safety protection facility for industrial sites.

[0003] In industrial sites where flammable dust is present, such as grain processing workshops, metal powder production plants, and chemical raw material warehouses, the risk of dust explosions is always present. While traditional roller shutters can achieve area isolation, their explosion-proof performance is significantly insufficient. In the event of a dust explosion, ordinary roller shutters are prone to displacement or loosening under the impact of the explosion or external vibration, leading to the spread of flames and high-temperature gases, affecting sealing performance and explosion-proof effectiveness. Furthermore, the mechanical friction between the roller shutter and its guide rails during opening and closing can also become an ignition source, exacerbating the explosion risk.

[0004] Therefore, how to provide an explosion-proof roller shutter door with a self-locking function to overcome the defects in the existing technology is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] Therefore, this utility model provides an explosion-proof roller shutter door with a self-locking function to solve the problems in the prior art, such as the easy displacement of traditional roller shutter doors under the impact of explosions or external vibrations, and the friction between the roller shutter door and the guide rail during the lifting and lowering process, which leads to the failure of sealing performance, reduced explosion-proof effect, and the risk of becoming an ignition source.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model discloses an explosion-proof roller shutter door with a self-locking function, comprising: The door frame is a square frame structure with a rotating roller at the top; The main body of the roller shutter door is connected to the roller shaft; A drive assembly is mounted on the outer side wall at the top of the door frame, and the drive assembly is used to drive the scroll to rotate.

[0007] Furthermore, the inner sidewall of the door frame is provided with a guide rail groove, the inner sidewall of the guide rail groove is rotatably connected with a roller, and a conductive brush is provided inside the guide rail groove, the conductive brush being in contact with the main body of the roller shutter door.

[0008] Furthermore, the main body of the roller shutter door includes several curtain panels connected end to end and hinges installed on the left and right sides of the curtain panels.

[0009] Furthermore, the driving component includes: An explosion-proof box is installed on the outer side wall at the top of the door frame; A dust explosion-proof motor is installed inside the explosion-proof box. The output end of the dust explosion-proof motor passes through the side wall of the door frame and is connected to the reel via a coupling.

[0010] Furthermore, it also includes a locking component, the locking component comprising: A locking tongue is installed at the bottom of the main body of the roller shutter door, and a locking block is formed at the bottom of the locking tongue; The push block is integrally formed on the side wall of the latch; An unlocking block is slidably connected to the side wall of the locking tongue, and the unlocking block is disposed between the locking block and the push block; Locking posts, arranged in pairs, are installed on the bottom wall of the door frame, and a sliding groove is provided on the side wall of the locking post; The locking block is slidably connected within the slide groove; A spring is connected at one end to the inner wall of the slide groove, and at the other end to the side wall of the locking block.

[0011] Furthermore, the cross-section of the locking block is a trapezoid with the upper base length greater than the lower base length, and the cross-section of the unlocking block is a trapezoid with the upper base length less than the lower base length.

[0012] Furthermore, the door frame, roller, and curtain panel are all grounded via a grounding wire.

[0013] This utility model has the following advantages: This invention constructs a complete static electricity conduction path by using an antistatic curtain panel connected by brass hinges, a guide rail groove with conductive brushes, and a grounding system covering the door frame, roller, and curtain panel. This eliminates the risk of sparks generated by component friction and static electricity accumulation, significantly improving product safety.

[0014] By setting up an explosion-proof enclosure and a dust explosion-proof motor, key power components such as the dust explosion-proof motor and coupling are integrated into the explosion-proof enclosure and selected models that meet explosion-proof standards, forming an independent explosion-proof power unit, eliminating the possibility of the power system becoming an ignition source in an explosive environment.

[0015] By incorporating locking components, the roller shutter door can effectively resist blast shock waves or external vibrations when closed, preventing door displacement or loosening, blocking the spread of flames and high-temperature gases, and ensuring reliability and structural integrity under extreme conditions. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 A perspective view of an explosion-proof roller shutter door with self-locking function provided for this utility model; Figure 2 A three-dimensional view of the internal structure of the door frame provided for this utility model; Figure 3 A perspective view of the curtain panel provided for this utility model; Figure 4 A cross-sectional view of the drive component provided by this utility model; Figure 5 A perspective view of the locking component provided by this utility model; Figure 6 A cross-sectional view of the locking component provided by this utility model.

[0019] In the diagram: 1. Door frame; 11. Roller shaft; 12. Guide rail groove; 13. Roller; 14. Conductive brush; 2. Roller shutter body; 21. Curtain panel; 22. Hinge; 3. Drive assembly; 31. Explosion-proof box; 32. Dust explosion-proof motor; 4. Locking assembly; 41. Lock tongue; 42. Lock block; 43. Push block; 44. Unlocking block; 45. Locking post; 46. Slide groove; 47. Locking block; 48. Spring. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please refer to Figures 1-6 The explosion-proof roller shutter door with self-locking function disclosed in this utility model will now be described. This utility model consists of three parts, as follows: Figure 1 , Figure 5 As shown, it includes a door frame 1, a roller shutter door body 2, and a drive assembly 3. The door frame 1 is a square frame structure with a roller shaft rotatably connected to the top. The roller shutter door body 2 is connected to the roller shaft. The drive assembly 3 is installed on the outer side wall of the top of the door frame 1 and is used to drive the roller shaft to rotate.

[0022] In this embodiment, the door frame 1, the roller shutter door body 2, and the drive assembly 3 are arranged as follows: Figure 1 As shown. The main body of the door frame 1 is made of stainless steel, which combines strength and corrosion resistance. The connection between the door frame 1 and the wall is firmly fixed with expansion bolts. The bolt holes are filled with fireproof sealant, which can effectively block dust and prevent it from leaking from the gaps, thus enhancing the explosion-proof sealing effect.

[0023] Preferably, a roller can be added to the top of the door frame 1. The roller is located in front of the roller. After the roller door body 2 comes out from the roller, it rests on the roller. The advantage of doing this is that it can increase the extension distance of the roller door body 2, thereby leaving the space in the upper part of the door frame 1 for the roller to store the roller door body 2.

[0024] like Figure 2 As shown, a guide rail groove 12 is provided on the inner side wall of the door frame 1. A roller 13 is rotatably connected to the inner side wall of the guide rail groove 12. A conductive brush 14 is provided inside the guide rail groove 12. The conductive brush 14 is in contact with the roller shutter door body 2.

[0025] In this embodiment, guide rail grooves 12 are provided on the side walls where the door frame 1 contacts the two sides of the roller shutter body 2. The guide rail grooves 12 adopt a U-shaped groove design, are made of stainless steel, and have rollers 13 above and below them to facilitate better cooperation between the roller shutter body 2 and the guide rail grooves 12. At the same time, conductive brushes 14 are provided in the guide rail grooves 12, and the conductive brushes 14 are in close contact with the two sides of the roller shutter body 2 to ensure that the static electricity generated by the roller shutter body 2 during the lifting and lowering process can be discharged in real time, eliminating the hidden danger of static electricity accumulation and further enhancing the explosion-proof performance.

[0026] Preferably, wear-resistant guide strips are provided in the guide rail groove 12 to reduce friction and noise when the roller shutter body 2 is raised and lowered.

[0027] like Figure 2 , Figure 3 As shown, the main body 2 of the roller shutter door includes several curtain panels 21 connected end to end and hinges 22 installed on the left and right sides of the curtain panels 21. Preferably, the door frame 1, the roller shaft and the curtain panels 21 are all grounded through a grounding wire and the grounding resistance does not exceed 4Ω.

[0028] In this embodiment, the curtain panel 21 adopts a multi-layer composite structure. The base layer is a high-strength alloy steel plate (3-5mm thick), which has good impact resistance; the middle layer is a fireproof and heat-insulating material, which can effectively block the transmission of high temperature; the outer layer is an anti-static coating with a surface resistance of no more than 10Ω, reducing static electricity accumulation. The curtain panels 21 are connected by hinges 22, which are made of brass to prevent sparks from friction and ensure strength and explosion-proof static safety.

[0029] By employing an antistatic curtain panel 21 connected by brass hinges 22, a guide rail groove 12 with conductive brushes 14, and a grounding system covering the door frame 1, roller, and curtain panel 21, a complete static electricity conduction path is constructed, eliminating the risk of sparks generated by component friction and static electricity accumulation, and significantly improving the safety of the product.

[0030] like Figure 4 As shown, the drive assembly 3 includes an explosion-proof box 31 and a dust explosion-proof motor 32. The explosion-proof box 31 is installed on the outer side wall of the top of the door frame 1, and the dust explosion-proof motor 32 is located inside the explosion-proof box 31. The output end of the dust explosion-proof motor 32 passes through the side wall of the door frame 1 and is connected to the roller through a coupling.

[0031] In this embodiment, the dust explosion-proof motor 32 shall comply with GB 12476.1 standard, have an explosion-proof mark of Ext DA21, have no horizontal surface, and the surface temperature of the motor housing shall not exceed 80% of the minimum ignition temperature of the dust. It shall also be housed within an explosion-proof enclosure 31. The output shaft of the dust explosion-proof motor 32 is connected to the winding shaft via an explosion-proof coupling. The explosion-proof coupling is made of copper alloy and has good electrical conductivity and impact resistance.

[0032] Preferably, the explosion-proof coupling has a ring-shaped main body with multiple elastic buffer elements inside. These elements are evenly distributed within the ring structure, effectively absorbing energy and reducing rigid impacts. Both ends of the explosion-proof coupling are equipped with connection interfaces adapted to the output shaft and reel of the dust explosion-proof motor 32, respectively, using keyed or splined connections to ensure a robust and stable connection.

[0033] By setting up an explosion-proof box 31 and a dust explosion-proof motor 32, key power components such as the dust explosion-proof motor 32 and coupling are integrated into the explosion-proof box 31 and selected models that meet explosion-proof standards, forming an independent explosion-proof power unit, eliminating the possibility of the power system becoming an ignition source in an explosive environment.

[0034] like Figure 5 , Figure 6As shown, it also includes a locking component 4, which includes a latch 41, a push block 43, an unlocking block 44, a locking pin 45, a locking block 47, and a spring 48. The latch 41 is installed at the bottom of the roller shutter door body 2, and a locking block 42 is formed at the bottom of the latch 41. The push block 43 is integrally formed on the side wall of the latch 41. The unlocking block 44 is slidably connected to the side wall of the latch 41 and is located between the locking block 42 and the push block 43. The locking pins 45 are arranged in pairs and installed on the bottom wall of the door frame 1. A groove 46 is provided on the side wall of the locking pin 45. The locking block 47 is slidably connected in the groove 46. One end of the spring 48 is connected to the inner side wall of the groove 46, and the other end of the spring 48 is connected to the side wall of the locking block 47.

[0035] In this embodiment, the shape and position of the locking tongue 41, push block 43, unlocking block 44, locking pin 45, locking block 47, and spring 48 are as follows: Figure 6 As shown.

[0036] The working principle of locking component 4 is as follows: When the door is closed, the dust explosion-proof motor 32 starts, driving the roller shutter door body 2 to move downward. The locking block 42 at the bottom of the locking tongue 41 moves downward and contacts the locking block 47, pushing the locking block 47 back into the slide groove 46. The locking block 42 descends below the locking block 47, and the spring 48 pushes the locking block 47 to limit the locking block 42. When the door is opened, firstly, the roller shutter body 2 is driven to move downward. The latch 41 will move downward along with the roller shutter body 2. The push block 43 will push the unlocking block 44 to move to a position slightly lower than the locking block 47, so that the locking block 47 abuts against the side wall of the unlocking block 44. During this process, the unlocking block 44 will push the locking block 47 to retract into the slide groove 46. Then, the main body 2 of the roller shutter door moves upward. The locking block 47 first limits the unlocking block 44. Then the locking block 42 moves upward until it is tightly against the bottom of the unlocking block 44, and pushes the unlocking block 44 to move upward together, so that the combination of the locking block 42 and the unlocking block 44 passes over the locking block 47 and completes the unlocking.

[0037] Preferably, the cross-section of the locking block 42 is a trapezoid with the upper base length greater than the lower base length, and the cross-section of the unlocking block 44 is a trapezoid with the upper base length less than the lower base length. This structural design ensures that when the locking block 42 moves upward, it can definitely pass through the position of the locking block 47.

[0038] By setting the locking component 4, the roller shutter door can effectively resist the shock wave of an explosion or external vibration when closed, prevent the door from shifting or loosening, and prevent the spread of flames and high-temperature gases, thus ensuring reliability and structural integrity under extreme working conditions.

[0039] Application scenario analysis and parameter determination: For specific application scenarios, collect parameters such as dust type (e.g., grain dust, metal dust), dust concentration, explosion limits, minimum ignition temperature, as well as doorway dimensions (width and height), ambient temperature, and humidity. Determine the explosion-proof rating of the roller shutter door based on the classification of dust explosion hazard zones.

[0040] Door installation and debugging: Install door frame 1 according to design requirements, ensuring that the verticality error of door frame 1 does not exceed 1mm / m and that it is firmly connected to the wall. Connect the curtain panel 21 into a whole using explosion-proof hinges 22, and install it onto the roller shaft. Adjust the clearance between the curtain panel 21 and the guide rail groove 12 to be no more than 2mm to ensure smooth lifting and lowering. Install the dust explosion-proof motor 32 and the roller shaft, calibrate the motor rotation and the tension of the transmission chain to ensure smooth transmission. Connect the electrical control system and perform a grounding resistance test (≤4Ω) and an electrical explosion-proof performance check. During commissioning, test the lifting speed of the roller shutter door (generally controlled between 0.1-0.3m / s), sealing performance (through dust penetration test), and whether the linkage response with the monitoring system is normal.

[0041] Routine maintenance and management: Establish a regular maintenance plan, and check daily whether the roller shutter door's lifting and lowering is smooth, the sealing is good, and the electrical control is normal. Clean dust from the guide rail groove 12 and curtain panel 21 weekly, check the lubrication of the drive chain, and replenish explosion-proof grease. Check the grounding system, the integrity of explosion-proof components, and the linkage function with other safety systems monthly. Conduct a comprehensive explosion-proof performance test and door structure strength inspection annually, and replace aged or damaged components promptly. Provide professional training to operators to ensure they are familiar with the equipment's operation methods, explosion-proof precautions, and emergency response procedures, ensuring the long-term safe and reliable operation of the equipment.

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An explosion-proof roller shutter door with a self-locking function, characterized in that, include: The door frame (1) is a square frame structure with a rotating roller at the top; The main body of the roller shutter door (2) is connected to the roller shaft; A drive assembly (3) is installed on the outer side wall of the top of the door frame (1), and the drive assembly (3) is used to drive the scroll to rotate; The inner sidewall of the door frame (1) is provided with a guide rail groove (12), and a roller (13) is rotatably connected to the inner sidewall of the guide rail groove (12). A conductive brush (14) is provided inside the guide rail groove (12), and the conductive brush (14) is in contact with the roller shutter door body (2). It also includes a locking component (4), which includes: A locking tongue (41) is installed at the bottom of the roller shutter body (2), and a locking block (42) is formed at the bottom of the locking tongue (41). The push block (43) is integrally formed on the side wall of the latch (41); The unlocking block (44) is slidably connected to the side wall of the latch (41), and the unlocking block (44) is disposed between the locking block (42) and the push block (43); Locking posts (45) are installed in pairs on the bottom wall of the door frame (1), and a sliding groove (46) is provided on the side wall of the locking post (45). The locking block (47) is slidably connected within the groove (46); One end of the spring (48) is connected to the inner wall of the slide (46), and the other end of the spring (48) is connected to the side wall of the locking block (47).

2. The explosion-proof roller shutter door with self-locking function as described in claim 1, characterized in that, The main body (2) of the roller shutter door includes several curtain panels (21) connected end to end and hinges (22) installed on the left and right sides of the curtain panels (21).

3. The explosion-proof roller shutter door with self-locking function as described in claim 1, characterized in that, The driving component (3) includes: An explosion-proof box (31) is installed on the outer side wall of the top of the door frame (1); The dust explosion-proof motor (32) is installed inside the explosion-proof box (31). The output end of the dust explosion-proof motor (32) passes through the side wall of the door frame (1) and is connected to the reel via a coupling.

4. The explosion-proof roller shutter door with self-locking function as described in claim 1, characterized in that, The cross-section of the locking block (42) is a trapezoid with the upper base length greater than the lower base length, and the cross-section of the unlocking block (44) is a trapezoid with the upper base length less than the lower base length.

5. The explosion-proof roller shutter door with self-locking function as described in claim 2, characterized in that, The door frame (1), roller and curtain panel (21) are all grounded through a grounding wire.

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