Multi-tooth flow channel type explosion suppression isolation protection retaining wall based on Z-shaped profile

Abstract

The invention belongs to the technical field of explosion suppression protection, and discloses a multi-tooth runner type explosion suppression isolation protection retaining wall based on Z-shaped profiles, which comprises a concrete base and a protection grating, a mounting groove is formed in the concrete base, a base plate is arranged at the bottom of the mounting groove, the protection grating comprises a base, a top seat and a row of special-shaped tooth profiles, the base is detachably arranged on the base plate, and the top seat is detachably arranged on the base plate. The special-shaped tooth profile comprises a Z-shaped profile and a plurality of turbulent flow toothed plates, an included angle of 30 degrees is formed between the width direction of a web plate of the Z-shaped profile and the width direction of the base plate, the distance from the end of a flange plate of the Z-shaped profile to the web plate of the adjacent Z-shaped profile is smaller than the width of the flange plate, and the turbulent flow toothed plates are distributed on the flange plate and the web plate of the Z-shaped profile. The multi-tooth flow channel is formed by the Z-shaped profile and the turbulent flow toothed plate, multiple hindrances are manufactured on the explosion shock wave propagation path, rapid dissipation of the total energy of the explosion shock waves is achieved, and therefore the explosion shock wave overpressure value and the explosion fireball heat radiation value are attenuated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of explosion suppression protection, in particular to a multi-tooth flow channel type explosion suppression isolation protection retaining wall based on Z-shaped profiles. BACKGROUND

[0002] Dangerous combustion and explosion products have high sensitivity, and external stimuli such as accidental friction, impact, static electricity and the like in the production process can cause them to burn and explode. In order to control the spread of accidental combustion and explosion accidents in the production process of dangerous combustion and explosion products and reduce personnel casualties and property losses caused by accidents, reinforced concrete protection structures are mostly used in production sites to achieve protection against explosion shock waves, fragments and heat radiation.

[0003] However, the reinforced concrete protection structure has a long construction period, high cost and cannot be moved. When the dangerous combustion and explosion product production line needs to be technologically transformed or upgraded, the transformation can only be carried out under the condition of the existing reinforced concrete protection structure space layout, which seriously restricts the process layout of the new production line. If the layout needs to be adjusted and the site space needs to be expanded, the original reinforced concrete protection structure has to be removed and new reinforced concrete protection structure construction has to be carried out according to the new space layout, which greatly increases the construction cost and construction period and greatly affects the industrial layout. In addition, the reinforced concrete protection structure is mostly force-coupled with the main structure of the plant, and is difficult to be directly removed and has a large removal difficulty. SUMMARY

[0004] In order to solve the above problems, the present application provides a multi-tooth flow channel type explosion suppression isolation protection retaining wall based on Z-shaped profiles.

[0005] The above technical purpose of the present application is achieved by the following technical scheme: a multi-tooth flow channel type explosion suppression isolation protection retaining wall based on Z-shaped profiles, comprising a pre-buried concrete base and a protection grid, the concrete base is provided with a mounting groove, the mounting groove is provided with a base plate at the groove bottom, the protection grid comprises a base and a top arranged in an upper and lower spaced manner, the base is detachably arranged on the base plate, a row of special-shaped tooth profiles arranged along the length direction of the base plate is arranged between the base and the top, the special-shaped tooth profile comprises a Z-shaped profile and a plurality of spoiler tooth plates, the length direction of the Z-shaped profile is perpendicular to the base plate surface, and the width direction of the web is at an angle of 30° with the width direction of the base plate, the distance from the end of the flange plate of the Z-shaped profile to the adjacent web of the Z-shaped profile is less than the width of the flange plate, the plurality of spoiler tooth plates are arranged on one side of the flange plate adjacent to the web of the Z-shaped profile and on both sides of the web of the Z-shaped profile, respectively, and the length direction of the spoiler tooth plate is consistent with the length direction of the Z-shaped profile and the plate surface is perpendicular to the flange plate / web of the Z-shaped profile at the position.

[0006] Furthermore, two deflector teeth are provided at intervals on the side of the flange of the Z-shaped profile near the web. One deflector tooth is located at the end of the flange of the Z-shaped profile, and the other deflector tooth is located at the center of the flange of the Z-shaped profile near the web. Two deflector teeth are symmetrically arranged on the center of the web of the Z-shaped profile, and both deflector teeth are arranged near the center of the web of the Z-shaped profile.

[0007] Furthermore, the protective grille includes a first grille assembly and a second grille assembly. The first grille assembly includes a first support plate and a first overlapping plate arranged parallel to each other on the plate surface. The width of the first overlapping plate is less than half the width of the first support plate and is arranged on one side of the first support plate. Several irregularly shaped toothed profiles are arranged between the first support plate and the first overlapping plate. An avoidance notch is opened at the end of the irregularly shaped toothed profiles near the first overlapping plate. The first overlapping plate is arranged in the avoidance notch and its outer plate surface is flush with the corresponding end face of the irregularly shaped toothed profile. The second grille assembly includes a second support plate, a second overlapping plate, and several irregularly shaped toothed profiles. The overall structure of the second grille assembly is mirror-symmetrical to the first grille assembly. After the second grille assembly is rotated vertically by 180°, it is inserted into the first grille assembly. The first support plate and the second overlapping plate are fitted together to form a base, and the first overlapping plate and the second support plate are fitted together to form a top seat.

[0008] Furthermore, the first overlapping plate is provided with a plurality of first clearance grooves that avoid the irregular tooth profiles in the second grid assembly, and the second overlapping plate is provided with a plurality of second clearance grooves that avoid the irregular tooth profiles in the first grid assembly.

[0009] Furthermore, the first support plate has two rows of first through holes symmetrically arranged in a central manner, the first overlapping plate has a row of second through holes with the same core as the corresponding first through holes, and the substrate has two rows of screws corresponding to the first through holes; the second support plate and the second overlapping plate have corresponding third and fourth through holes.

[0010] Furthermore, the concrete base includes a concrete base plate, the concrete base plate is provided with an installation base, the installation groove is opened in the installation base, and the bottom of the base plate is welded with anchor bars that are embedded in the installation base.

[0011] Furthermore, a cover plate is detachably installed in the mounting groove. The cover plate is a box-shaped structure with an open bottom surface and a size consistent with the cavity of the mounting groove. Several reinforcing ribs are arranged in a crisscross pattern inside the box-shaped cavity. Two lifting holes are opened at each end of the top surface of the cover plate.

[0012] In summary, the present invention has the following beneficial effects:

[0013] 1. In this application, a concrete base and a protective grid are provided. The concrete base is pre-embedded in the foundation pit corresponding to the location where the protective retaining wall needs to be installed, ensuring the stability of the base and thus providing a solid bottom foundation for the protective grid, ensuring the stability of the protective grid under the impact of an explosion. The protective grid is detachably installed in the base plate of the concrete base through a base, so that the entire protective grid can be disassembled. This way, the on-site modification is not affected by the protective retaining wall structure, and the construction difficulty, construction cost and construction period of the on-site modification are greatly reduced.

[0014] 2. In this application, the protective grid is formed by a base, a top seat, and irregularly shaped toothed profiles, creating an overall framework that eliminates direct gaps in the vertical plane of the protective wall. This allows it to withstand explosive fragments and attenuate the overpressure value of the blast shock wave and the thermal radiation value of the blast fireball. The Z-shaped profiles and slightly interfering flow toothed plates within the irregularly shaped toothed profiles form a complex multi-toothed flow channel, creating multiple obstacles along the propagation path of the blast shock wave. This induces mechanical instability in the high-pressure gas molecules at each stage, transforming the blast shock wave from a Mach number-dominated, nearly inviscid fluid into a Reynolds number-dominated, viscous fluid. During propagation within the flow channel, a large amount of disordered turbulence gradually forms. Ultimately, through viscous dissipation, internal energy is converted into thermal and kinetic energy at the microscopic scale, achieving rapid and efficient dissipation of the total energy of the blast shock wave, thereby attenuating the overpressure value of the blast shock wave and the thermal radiation value of the blast fireball.

[0015] 3. In this application, a first grid assembly and a second grid assembly are provided, and a protective grid is formed by splicing the first grid assembly and the second grid assembly. This can reduce the weight of a single grid assembly, facilitate production and handling, and also facilitate disassembly and replacement later. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the concrete base structure according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure after the concrete base is covered with a cover plate according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the cover plate in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the protective grille according to an embodiment of the present invention;

[0021] Figure 6 This is a cross-sectional schematic diagram of the protective grille according to an embodiment of the present invention;

[0022] Figure 7This is a schematic diagram of the Z-shaped profile and the spoiler tooth plate connected by bolts in an embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the structure of the Z-shaped profile and the spoiler tooth plate welded using a through-hole plug welding process according to an embodiment of the present invention;

[0024] Figure 9 This is a schematic diagram showing the angle at which the protective barrier can block the scattering of fragments according to an embodiment of the present invention;

[0025] Figure 10 This is an exploded structural diagram of the protective grille according to an embodiment of the present invention;

[0026] Figure 11 This is a schematic diagram comparing the structures of the first grille assembly and the second grille assembly in an embodiment of the present invention.

[0027] In the diagram: 10. Concrete base; 11. Mounting groove; 12. Base plate; 13. Screw; 14. Concrete base plate; 15. Mounting base; 20. Protective grille; 21. Base; 22. Top seat; 23. Irregular tooth profile; 231. Z-shaped profile; 232. Deflector tooth plate; 24. First grille assembly; 241. First support plate; 242. First overlapping plate; 243. First clearance groove; 244. First through hole; 245. Second through hole; 25. Second grille assembly; 251. Second support plate; 252. Second overlapping plate; 253. Second clearance groove; 254. Third through hole; 255. Fourth through hole; 30. Cover plate; 31. Reinforcing rib plate; 32. Lifting hole. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] like Figures 1-11 As shown in the figure, this application discloses a multi-tooth flow channel explosion suppression isolation and protection barrier based on Z-shaped profile, including a pre-embedded concrete base 10, a protective grid 20 and a cover plate 30.

[0030] Specifically, the concrete base 10 is a pre-embedded reinforced concrete structure, which can be directly cast on-site or prefabricated in a factory and then embedded in the foundation pit corresponding to the location where the protective retaining wall needs to be installed. This ensures the stability of the base and provides a solid foundation for the protective grid 20, guaranteeing its stability under explosive impact. The concrete base 10 consists of two layers: a concrete base slab 14 at the bottom, upon which the mounting base 15 is installed. Both the concrete base slab 14 and the mounting base 15 are constructed using ordinary C30 plain concrete reinforced with 8mm diameter HPB235 steel bars and 20mm diameter HRB335 steel bars. During construction, the top surface of the mounting base 15 is flush with the factory floor level. Areas on the concrete base slab 14 outside the mounting base 15 are filled with concrete or plain soil, ensuring that the concrete base 10 integrates seamlessly with the factory floor and does not affect the factory layout.

[0031] An installation groove 11 is formed within the mounting base 15. The installation groove 11 can be pre-reserved during the pouring of the mounting base 15, avoiding the waste of manpower for later excavation. A base plate 12, which is a 10mm thick steel plate, is provided at the bottom of the installation groove 11 for connecting the protective grid 20. During the concrete pouring of the mounting base 15, anchor bars are welded to the bottom of the base plate 12 and embedded into the mounting base 15. The anchor bars can be HRB335 hook-shaped steel bars with a diameter of 18mm. The anchor bars allow the base plate 12 to overlap with the steel bars in the reinforced concrete foundation, thereby firmly fixing the base plate 12 in the installation groove 11 of the mounting base 15 and ensuring the bottom stability of the protective grid 20 after installation.

[0032] A cover plate 30 is detachably installed inside the mounting slot 11. After the cover plate 30 is installed inside the mounting slot 11, its upper surface is flush with the upper surface of the mounting slot 11 and the ground surface. When the plant process is adjusted so that the protective barrier is no longer needed in the original location, simply remove the protective grid 20 and then place the cover plate 30 inside the mounting slot 11 to ensure that the base is flush with the ground. When the protective barrier needs to be redeployed, simply open the cover plate 30 and reinstall the protective grid 20. The cover plate 30 is a box-shaped structure with an open bottom and the same size as the cavity of the mounting slot 11. Several reinforcing ribs 31 are arranged crisscrossingly inside the box-shaped cavity. It can be made of high-strength conductive rubber material and integrally injection molded to ensure that the cover plate 30 has sufficient strength. To facilitate the installation and hoisting of the cover plate 30, two hoisting holes 32 are opened at each end of the cover plate 30. The lifting hole 32 is a countersunk bolt hole. After the cover plate 30 is installed in the mounting groove 11, the lifting hole 32 can be sealed with countersunk bolts to prevent dangerous materials or impurities from entering.

[0033] The protective grille 20 includes a base 21 and a top seat 22, which are arranged at intervals. The base 21 is detachably mounted on the base plate 12, so that the entire protective grille 20 can be disassembled. This way, it can be modified on site without being affected by the protective retaining wall structure, and the construction difficulty, construction cost and construction period of the on-site modification are greatly reduced.

[0034] A row of irregularly shaped toothed profiles 23 arranged along the length of the base plate 12 is provided between the base 21 and the top seat 22. The irregularly shaped toothed profiles 23 include Z-shaped profiles 231 and deflection plate 232. The Z-shaped profiles 231 are made of steel profiles, aluminum alloy profiles, or other materials with sufficient strength, such as Z-shaped steel or Z-shaped aluminum, preferably Z-shaped 120×80×6 hot-rolled steel of grade Q235. The upper and lower ends of the Z-shaped profiles 231 are welded and fixed to the base 21 and the top seat 22, thereby forming the overall protective structure of the protective grille 20. The deflection plate 232 is a steel or aluminum plate structure, and its length is the same as that of the Z-shaped profiles 231.

[0035] In the specific arrangement, the length direction of the Z-shaped profile 231 is perpendicular to the surface of the base plate 12, and the width direction of the web plate forms a 30° angle with the width direction of the base plate 12, so that the center of symmetry of the Z-shaped profile 231 is located on the transverse center line of the base 21. The distance from the end of the flange plate of the Z-shaped profile 231 to the web plate of the adjacent Z-shaped profile 231 is less than the width of the flange plate, so that the flange plates of the adjacent Z-shaped profiles 231 are staggered with each other, so that there is no direct gap in the vertical plane, which can be used to resist the explosive fragments generated by the explosion. If the flow-disrupting toothed plates 232 are respectively arranged on the side of the flange plate near the web of the Z-shaped profile 231 and on both sides of the web of the Z-shaped profile 231, the length direction of the flow-disrupting toothed plates 232 is consistent with the length direction of the Z-shaped profile 231 and the plate surface is perpendicular to the flange plate / web of the Z-shaped profile 231 at the location, the flow-disrupting toothed plates 232 form flow-disrupting teeth in the flow channel between adjacent Z-shaped profiles 231, further increasing the complexity of the airflow channel and forming a complex multi-tooth flow channel, thereby creating multiple obstacles in the propagation path of the explosion shock wave.

[0036] When the explosive shock wave passes through the corners and notches of the flow channel, a large amount of energy conversion occurs due to rarefaction and instability, that is, the shock wave is converted into thermal energy and kinetic energy, thereby achieving energy attenuation of the explosive shock wave. The multi-tooth flow channel mentioned in this application forms more than one corner or notch, which can achieve a significant attenuation of the shock wave energy.

[0037] The attenuation principle of shock wave energy within the multi-tooth flow channel of this application can be roughly manifested in five phenomena:

[0038] 1) Reflection mechanism: When a shock wave strikes the rigid wall of the irregular tooth profile 23 at a certain angle, regular reflection will occur; as the incident angle increases or the wave becomes stronger, it will transform into Mach reflection, forming a stronger composite shock wave (Mach rod). In complex and narrow channels, these two types of reflection will occur alternately or simultaneously, resulting in local energy enhancement.

[0039] 2) Chase and Superposition: In curved or bifurcated flow channels, subsequent reflected waves may catch up with the previous main incident wave front. Since shock waves are compression waves, the chasing and superposition of subsequent waves can cause a sudden increase in pressure, density, and particle velocity at the main incident wave front. This is similar to the "shock focusing" or "detonation focusing" effect in acoustics, resulting in local energy amplification.

[0040] 3) Flow channel cross-sectional area reduction effect: According to one-dimensional flow theory, under instantaneous impact, a boundary layer also exists on the flow channel wall. The thickness of the boundary layer reduces the cross-sectional area available for shock wave propagation. When the shock wave enters the channel with a reduced cross-sectional area, the wave propagation velocity (particle velocity) increases to maintain mass conservation. This is similar in phenomenon to the acceleration of compressible fluids in a contracting tube, but the driving mechanism is wave dynamics rather than steady-state flow. Therefore, the instantaneous increase in local shock wave velocity observed in narrow sections is essentially the result of wave energy convergence and compression caused by geometric constraints, a localized intensification phenomenon.

[0041] 4) Wall friction and heat conduction (dissipation): The flow channel wall is a rough surface (not "smooth"). The high-speed airflow collides and rubs against the wall, directly converting part of the wave's kinetic energy into heat energy, thus achieving frictional dissipation. The high-temperature gas behind the wave exchanges heat with the wall, and the heat is absorbed and "stored" by the wall. This part of the energy is directly stripped from the wave's energy.

[0042] 5) Energy dissipation in the sparse region: When a shock wave bypasses a corner or passes through a narrow opening, the wavefront rapidly expands outwards, generating a series of expansion waves (or rarefaction waves). When the reflected shock wave catches up with the initial incident shock wave, it inevitably passes through the rarefaction wave (sparse region). After the reflected shock wave's wavefront intrudes into the low-temperature, low-pressure, low-density, and low-sound-velocity rarefaction region, the pressure and velocity of the reflected shock wave's wavefront decrease. In other words, the rarefaction wave "dilutes" and "disperses" the energy of the reflected wave, resulting in energy dissipation. Because this phenomenon occurs before the pursuit and superposition, the local energy enhancement effect formed by the pursuit and superposition is weakened overall.

[0043] Under the action of the multi-toothed flow channel, mechanical instability of the high-pressure gas molecular fluid is induced step by step, transforming the explosion shock wave from a near-inviscid fluid dominated by the Mach number to a viscous fluid dominated by the Reynolds number. During its propagation within the flow channel, a large amount of disordered turbulence is gradually formed. Ultimately, through viscous dissipation, the internal energy is converted into thermal and kinetic energy at the microscopic scale, achieving rapid and efficient dissipation of the total energy of the explosion shock wave, thereby attenuating the overpressure value of the explosion shock wave and the thermal radiation value of the explosion fireball.

[0044] Preferably, two deflector plates 232 are spaced apart on the side of the flange of the Z-shaped profile 231 near the web. One deflector plate 232 is located at the end of the flange of the Z-shaped profile 231, and the other deflector plate 232 is located at the center of the flange of the Z-shaped profile 231 near the web. Two deflector plates 232 are symmetrically arranged at the center of the web of the Z-shaped profile 231, and both deflector plates 232 are arranged near the center of the web of the Z-shaped profile 231.

[0045] To ensure the connection strength of the spoiler tooth plate 232 on the Z-shaped profile 231, equilateral angle steel and T-shaped steel are used for connection. Specifically, two ∟20×3 equilateral angle steels are spaced apart on the side of the flange plate of the Z-shaped profile 231 near the web. One flange plate of the two equilateral angle steels is attached to the flange plate of the Z-shaped profile 231 and connected by bolts or through-hole plug welding. The other flange plate is perpendicular to the corresponding flange plate of the Z-shaped profile 231 to form the spoiler tooth plate 232. The openings of the two equilateral angle steels face the web of the Z-shaped profile 231. The corner of one equilateral angle steel is aligned with the end of the flange plate of the Z-shaped profile 231, and the end of the flange plate of the other equilateral angle steel is aligned with the corresponding inner corner of the flange plate of the Z-shaped profile 231. The equilateral angle steels on the two flange plates of the Z-shaped profile 231 are arranged symmetrically with the center of the web of the Z-shaped profile 231 as the center of symmetry.

[0046] Two 25×25×3 T-shaped steels are symmetrically arranged on both sides of the web of the Z-shaped profile 231. The flanges of the T-shaped steels are attached to the web of the Z-shaped profile 231 and connected by bolts or through-hole plug welding. The web of the T-shaped steels is perpendicular to the web of the Z-shaped profile 231, forming a spoiler tooth plate 232. In this arrangement, the side surface of the T-shaped steel web opposite to the flange of the Z-shaped profile 231 is coplanar with the outer side surface of the flange of the adjacent Z-shaped profile 231, and there is a gap between the end of the T-shaped steel web and the end of the flange of the adjacent Z-shaped profile 231 to allow airflow.

[0047] During the specific connection, through holes of M6 bolt size are pre-drilled on the corresponding flange plates of the equilateral angle steel and on both sides of the flange plate of the T-shaped steel located on the web plate. Through holes of M6 bolt size are also pre-drilled on the corresponding positions of the flange plate and web plate of the Z-shaped profile 231. Then, the equilateral angle steel and T-shaped steel are placed in the installation position and the through holes on the equilateral angle steel and T-shaped steel are aligned with the corresponding through holes on the Z-shaped profile 231. Then, M6 bolts are used to pass through the through holes to fix the equilateral angle steel and T-shaped steel to the Z-shaped profile 231. Alternatively, an M6 stud with a length greater than the thickness of the Z-shaped profile 231 is placed in the aligned through holes. The studs are then welded to the flanges of the equilateral angle steel / T-shaped steel using an electric welding machine, and the welded surface is flush with the flange surface.

[0048] By arranging four equilateral angle steels and two T-shaped steels, six baffle plates 232 are formed, creating six baffles within the multi-toothed flow channel. This significantly attenuates the energy of the explosive shock wave as it passes through the channel. It also increases the number of penetration-resistant metal and air layers, with four metal layers and three air layers, improving the metal flow channel structure's resistance to fragment penetration.

[0049] By placing the protective barrier in this embodiment 1m away from the blast origin, it can capture and block blast fragments flying at a dispersion angle of 0° to 25°. Figure 9 As shown, the optimal protection angle of the protective barrier in this embodiment is 15.67°, the minimum thickness of the metal protective layer can reach 12mm, and the maximum thickness of the metal protective layer can reach 34mm. It can protect against the maximum penetration velocity of explosive fragments from typical 3cm×3cm×5cm steel equipment at 1097m / s and resist the maximum penetration kinetic energy of 211.2kJ. Thus, by blocking all incoming fragments and attenuating the explosive shock wave and thermal radiation, it can achieve the function of preventing sympathetic explosion and meet the penetration protection requirements of accidental explosion fragments in the production process of general dangerous combustible and explosive materials.

[0050] Further configuration: the protective grille 20 is divided into a first grille assembly 24 and a second grille assembly 25. The first grille assembly 24 includes a first support plate 241 and a first overlapping plate 242 arranged parallel to each other. The width of the first overlapping plate 242 is less than half the width of the first support plate 241 and is arranged on one side of the first support plate 241. The first support plate 241 is a 10mm thick wide strip steel plate formed from Q235 hot-rolled steel, and the first overlapping plate 242 is a 10mm thick narrow strip steel plate formed from Q235 hot-rolled steel. Several irregularly shaped toothed profiles 23 are arranged between the first support plate 241 and the first overlapping plate 242. An avoidance notch is provided at the end of the irregularly shaped toothed profile 23 near the first overlapping plate 242. The first overlapping plate 242 is arranged within the avoidance notch, and its outer plate surface is flush with the corresponding end face of the irregularly shaped toothed profile 23.

[0051] The second grille assembly 25 includes a second support plate 251, a second overlapping plate 252, and several irregularly shaped toothed profiles 23. The material and size of the second support plate 251 are the same as those of the first support plate 241, and the material and size of the second overlapping plate 252 are the same as those of the first overlapping plate 242. The number of irregularly shaped toothed profiles 23 in the second grille assembly 25 is the same as that in the first grille assembly 24. The overall structural layout of the second grille assembly 25 is mirror-symmetrical to that of the first grille assembly 24. In use, the second grille assembly 25 is vertically rotated 180° and then inserted into the first grille assembly 24. The first support plate 241 and the second overlapping plate 252 fit together to form a base 21, and the first overlapping plate 242 and the second support plate 251 fit together to form a top seat 22. The irregularly shaped toothed profiles 23 in the first grille assembly 24 and the second grille assembly 25 are arranged in a row to form a complete protective grille 20.

[0052] To ensure smooth insertion, several first clearance grooves 243 are formed on the first lap plate 242 to avoid the irregular toothed profiles 23 inside the second grid assembly 25, and several second clearance grooves 253 are formed on the second lap plate 252 to avoid the irregular toothed profiles 23 inside the first grid assembly 24. Both the first clearance grooves 243 and the second clearance grooves 253 are semi-circular grooves to avoid the irregular toothed profiles 23 during insertion. The semi-circular groove design can also be used for the transition of the force transmission path of the components, which helps to avoid stress concentration in the lap plate under explosive loads and the dynamic tensile and torsional action of the steel grid, reducing the risk of local deformation and cracking, and ensuring the overall stability of the structure. Furthermore, while ensuring structural strength and stability, it also reduces the weight of the grid.

[0053] Two rows of first through holes 244 are centrally symmetrically arranged on the first support plate 241, with the center of symmetry being the center point of the first support plate 241. A row of second through holes 245, coaxial with the corresponding first through holes 244, is opened on the first overlapping plate 242. Two rows of screws 13 are provided on the base plate 12 corresponding to the first through holes 244, and all screws 13 are M24 ordinary high-strength screws 13. A third through hole 254 and a fourth through hole 255 are correspondingly opened on the second support plate 251 and the second overlapping plate 252.

[0054] During installation, first lift the first grille assembly 24, align the first through hole 244 on the first support plate 241 of the first grille assembly 24 with the screw 13 on the base plate 12, and lower the first grille assembly 24 so that the first support plate 241 of the first grille assembly 24 is in contact with the base plate 12. Then, rotate the second grille assembly 25 vertically 180° and lift it up so that the second overlapping plate 252 of the second grille assembly 25 faces downward. Insert the second grille assembly 25 into the first grille assembly 24, and make the fourth through hole 255 on the second overlapping plate 252 aligned. Align the screws 13 on the corresponding side of the base plate 12, lower the second grid assembly 25 so that the second overlapping plate 252 fits against the first support plate 241, and screw on the M24 nut at the end of the screw 13, thereby fastening the first support plate 241 and the second overlapping plate 252 to form the base 21 of the protective grid 20; then align the third through hole 254 on the second support plate 251 with the second through hole 245 on the first overlapping plate 242 and connect them with M24 bolts to form the top seat 22, and finally tighten the M24 nut and M24 bolt to achieve fastening. In this way, the first grid assembly 24 and the second grid assembly 25 can be spliced ​​together to form the protective grid 20 and the protective grid 20 can be detachably fixed to the base plate 12. By using two sets of grid assemblies to splice the protective grid 20, the weight of each set of grid assemblies can be controlled within 250kg, and it can be transported by 4 people. When vertically assembling the grid, a small, liftable gantry crane or a small hoist can be used. The assembly of two sets of grids can be completed within 20 minutes, significantly shortening construction time and reducing construction difficulty and complexity. Subsequent disassembly and replacement only require unscrewing the bolts, making disassembly and replacement convenient.

[0055] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A multi-tooth flow channel explosion-proof isolation and protective barrier based on Z-shaped profiles, characterized in that: The system includes an embedded concrete base (10) and a protective grille (20). The concrete base (10) has an installation groove (11) with a base plate (12) at the bottom. The protective grille (20) includes a base (21) and a top plate (22) spaced apart vertically. The base (21) is detachably mounted on the base plate (12). A row of irregularly shaped toothed profiles (23) arranged along the length of the base plate (12) is provided between the base (21) and the top plate (22). The irregularly shaped toothed profiles (23) include Z-shaped profiles (231) and minor interference flow toothed plates (232). The length direction of the Z-shaped profile (231) is perpendicular to the surface of the substrate (12), and the width direction of the web is at a 30° angle to the width direction of the substrate (12). The distance from the end of the flange of the Z-shaped profile (231) to the web of the adjacent Z-shaped profile (231) is less than the width of the flange. If the flow-disrupting toothed plates (232) are respectively arranged on the side of the flange of the Z-shaped profile (231) near the web and on both sides of the web of the Z-shaped profile (231), the length direction of the flow-disrupting toothed plates (232) is consistent with the length direction of the Z-shaped profile (231) and the plate surface is perpendicular to the flange / web of the Z-shaped profile (231) at the location.

2. The multi-tooth flow channel explosion suppression and isolation protective barrier based on Z-shaped profiles according to claim 1, characterized in that: Two deflector teeth (232) are provided at intervals on the side of the flange of the Z-shaped profile (231) near the web. One deflector tooth (232) is located at the end of the flange of the Z-shaped profile (231), and the other deflector tooth (232) is located at the center of the flange of the Z-shaped profile (231) near the web. Two deflector teeth (232) are symmetrically arranged on the center of the web of the Z-shaped profile (231), and both deflector teeth (232) are arranged near the center of the web of the Z-shaped profile (231).

3. The multi-tooth flow channel explosion suppression and isolation protective barrier based on Z-shaped profiles according to claim 2, characterized in that: The protective grille (20) includes a first grille assembly (24) and a second grille assembly (25). The first grille assembly (24) includes a first support plate (241) and a first overlapping plate (242) arranged parallel to each other on the plate surface. The width of the first overlapping plate (242) is less than half the width of the first support plate (241) and is arranged on one side of the first support plate (241). A plurality of irregular tooth profiles (23) are arranged between the first support plate (241) and the first overlapping plate (242). The irregular tooth profiles (23) have a clearance notch at one end near the first overlapping plate (242). 242) Arranged within the clearance gap and with the outer plate surface flush with the corresponding end face of the irregular tooth profile (23); The second grid assembly (25) includes a second support plate (251), a second overlapping plate (252) and several irregular tooth profiles (23). The overall structure of the second grid assembly (25) is mirror-symmetrical to the first grid assembly (24). After the second grid assembly (25) is rotated vertically by 180°, it is inserted into the first grid assembly (24). The first support plate (241) and the second overlapping plate (252) are fitted together to form a base (21). The first overlapping plate (242) and the second support plate (251) are fitted together to form a top seat (22).

4. The multi-tooth flow channel explosion suppression and isolation protective barrier based on Z-shaped profiles according to claim 3, characterized in that: The first overlapping plate (242) is provided with a plurality of first clearance grooves (243) for avoiding the irregular tooth profile (23) in the second grid assembly (25), and the second overlapping plate (252) is provided with a plurality of second clearance grooves (253) for avoiding the irregular tooth profile (23) in the first grid assembly (24).

5. A multi-tooth flow channel explosion suppression and isolation protective barrier based on Z-shaped profiles according to claim 4, characterized in that: The first support plate (241) has two rows of first through holes (244) symmetrically arranged in a central direction. The first overlapping plate (242) has a row of second through holes (245) that are co-centric with the corresponding first through holes (244). The base plate (12) has two rows of screws (13) corresponding to the first through holes (244). The second support plate (251) and the second overlapping plate (252) have corresponding third through holes (254) and fourth through holes (255).

6. The multi-tooth flow channel explosion suppression and isolation protective barrier based on Z-shaped profiles according to claim 2, characterized in that: The concrete base (10) includes a concrete base plate (14), the concrete base plate (14) is provided with an installation base (15), the installation groove (11) is opened in the installation base (15), and the bottom of the base plate (12) is welded with anchor bars and embedded in the installation base (15).

7. A multi-tooth flow channel explosion suppression and isolation protective barrier based on Z-shaped profiles according to claim 6, characterized in that: The mounting groove (11) is detachably provided with a cover plate (30). The cover plate (30) is a box-shaped structure with an open bottom surface and a size consistent with the cavity of the mounting groove (11). Several reinforcing ribs (31) are arranged in a crisscross pattern inside the box-shaped cavity. Two lifting holes (32) are opened at each end of the top surface of the cover plate (30).

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