Runner type explosion suppression isolation protection retaining wall based on I-shaped profile

Abstract

The invention belongs to the technical field of explosion suppression protection, and discloses an I-shaped profile-based flow channel type explosion suppression isolation protection retaining wall, which comprises a concrete base and a protection grid, a mounting groove is formed in the concrete base, a base plate is arranged at the bottom of the mounting groove, the protection grid comprises a base and a top seat, the base is detachably arranged on the base plate, and the top seat is detachably arranged on the top seat. Two rows of I-shaped profiles arranged at intervals in the length direction of the base plate are arranged between the base and the top seat, the length direction of the I-shaped profiles is perpendicular to the base plate, and wing plates on the two sides of the I-shaped profiles in the same row are coplanar. The two rows of I-shaped profiles are arranged in a staggered mode, and the interval between every two adjacent I-shaped profiles in the same row is smaller than the width of the I-shaped profiles and larger than the thickness of webs of the I-shaped profiles. The bent flow channel is formed by the two rows of I-shaped profiles which are arranged in a staggered mode, so that shock waves entering the flow channel are continuously reflected and diffracted, the internal energy of the shock waves is greatly attenuated, overpressure and heat radiation of explosive shock waves penetrating through the protective grating are effectively attenuated, and penetration of explosive fragments is effectively resisted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of explosion suppression protection, in particular to a flow channel type explosion suppression isolation protection retaining wall based on I-shaped section. 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 thermal 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 can only be demolished, and then a new reinforced concrete protection structure can be constructed 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 cannot be directly removed, and is difficult to remove. SUMMARY

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

[0005] The above technical purpose of the present application is achieved by the following technical scheme: a flow channel type explosion suppression isolation protection retaining wall based on I-shaped section, 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 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, two rows of I-shaped sections are arranged between the base and the top in a spaced manner along the length direction of the base plate, the length direction of the I-shaped section is perpendicular to the base plate surface, and the surface of the two side wings of the I-shaped section in the same row is coplanar, the two rows of I-shaped sections are arranged in a staggered manner, and the spacing between the two adjacent I-shaped sections in the same row is less than the width of the I-shaped section and greater than the thickness of the web of the I-shaped section.

[0006] Further, the protective grid comprises a first grid assembly and a second grid assembly, the first grid assembly comprises first supporting plates and first lap plates arranged in parallel and spaced apart, a row of first I-beams is arranged between the first supporting plates and the first lap plates and spaced apart along the length direction of the base plate, one side flange plate surface of the first I-beam is coplanar with the corresponding side surface of the first supporting plate and the first lap plate, the width of the first supporting plate is greater than or equal to the sum of the height of the first I-beam and the width of the first lap plate, and the width of the first lap plate is less than the height of the first I-beam by at least the thickness of one first I-beam flange plate, the second grid assembly comprises second supporting plates, second lap plates and a row of second I-beams, the overall structure of the second grid assembly is mirror-symmetric to the first grid assembly, and the second grid assembly is inserted into the first grid assembly after being vertically rotated by 180° to form the protective grid, the first supporting plate and the second lap plate are attached to form a base, and the first lap plate and the second supporting plate are attached to form a top.

[0007] Further, a row of first through holes and second through holes are respectively formed in the first supporting plates and the first lap plates and located between adjacent two first I-beams, a row of third through holes are formed in the first supporting plates away from the first through holes and are centrally symmetric to the first through holes, and two rows of screw rods are arranged on the base plate corresponding to the first through holes and the third through holes; a row of fourth through holes corresponding to the second through holes are formed in the second supporting plates, and a row of fifth through holes corresponding to the third through holes are formed in the second lap plates.

[0008] Further, a cover plate for covering the installation slot is further included, the size of the cover plate is consistent with the size of the slot cavity of the installation slot, and two lifting holes are respectively formed at two ends of the cover plate.

[0009] Further, the cover plate is in a box-like structure with an open bottom surface, a plurality of reinforcing rib plates are arranged in a crisscross manner in the box-like cavity of the cover plate, and the upper surface of the cover plate is flush with the upper surface of the installation slot and the surface of the floor.

[0010] Further, the lifting hole is a countersunk bolt hole.

[0011] Further, the concrete base comprises a concrete bottom plate, the concrete bottom plate is provided with a mounting base, the installation slot is formed in the mounting base, and an anchor bar is welded to the bottom of the base plate and pre-buried in the mounting base.

[0012] In summary, the present invention has the following beneficial effects: In this application, a cross-protective structure is formed by two rows of staggered I-beams, which can be used to resist explosive fragments generated by an explosion and attenuate the overpressure value of the explosion shock wave and the thermal radiation value of the explosion fireball. The staggered arrangement of the two rows of I-beams forms a bent flow channel, thereby creating multiple obstacles in the propagation path of the explosion shock wave. This prevents the explosion shock wave from directly passing through the protective grid. Part of it is reflected back by the wave-facing surface of the protective grid, while the other part enters the flow channel formed by the two rows of I-beams, where it is continuously reflected and diffracted. This causes the shock wave to continuously expand, compress, and converge due to the synchronous formation of sparse regions, shear layers, boundary layers, and eddies. Under the above-mentioned effects, the internal energy of the explosion shock wave is continuously dissipated and converted into the kinetic energy of the high-frequency vibration of the protective structure and the heat energy generated by the continuous friction of gas molecules. The kinetic energy is dissipated by the dynamic response of the protective structure, while the heat energy is transferred into the metal flow channel of the protective structure and slowly dissipated by entropy increase. Simultaneously, the flow channel structure "folds" the propagation paths of the explosive shock wave and fireball, transforming the straight-line propagation path into a zigzag path, indirectly extending the propagation distance of the explosive effect. Therefore, the internal energy of the shock wave is significantly converted, effectively attenuating the overpressure peak of the explosive shock wave and the thermal radiation value of the explosive fireball. Furthermore, the interlacing of the two rows of I-beams forms multiple layers of metal and air. During the penetration of the metal and air layers, the explosive fragments undergo kinetic energy attenuation and re-impact attitude adjustment, significantly reducing the specific kinetic energy of the explosive fragments, thus effectively resisting their penetration. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the protective grille according to an embodiment of the present invention;

[0015] Figure 3 This is a cross-sectional schematic diagram of the protective grille according to an embodiment of the present invention;

[0016] Figure 4 This is an exploded structural diagram of the protective grille according to an embodiment of the present invention;

[0017] Figure 5 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;

[0018] Figure 6 This is a schematic diagram of the concrete base structure according to an embodiment of the present invention;

[0019] Figure 7 This is a schematic diagram of the structure of the concrete base with cover plate according to an embodiment of the present invention;

[0020] Figure 8 This is a schematic diagram of the cover plate in an embodiment of the present invention;

[0021] 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;

[0022] Figure 10 This is a schematic diagram illustrating the constraint effect of the flow channel structure of the protective barrier wall on the shock wave according to an embodiment of the present invention;

[0023] Figure 11 This is a schematic diagram illustrating the evolution of the process by which the explosive shock wave is intercepted at the contact point between the surface of the I-beam profile and the target material, according to an embodiment of the present invention.

[0024] Figure 12 This is a schematic diagram illustrating the evolution of the explosion shock wave entering the narrow opening upon encountering the right-side flange of the I-beam profile in an embodiment of the present invention.

[0025] Figure 13 This is a schematic diagram illustrating the evolution of the explosion shock wave propagating in an L-shaped flow channel according to an embodiment of the present invention;

[0026] Figure 14 This is a schematic diagram illustrating the evolution of the explosion shock wave from the pipe into the large space according to an embodiment of the present invention;

[0027] Figure 15 This is a schematic diagram illustrating the evolution of the explosion shock wave propagating along a straight pipe according to an embodiment of the present invention.

[0028] In the diagram: 10. Concrete base; 11. Mounting groove; 12. Base plate; 13. Screw; 14. Concrete base slab; 15. Mounting base; 20. Protective grille; 21. Base; 22. Top seat; 23. I-beam; 24. First grille assembly; 241. First support plate; 242. First overlapping plate; 243. First I-beam; 244. First through hole; 245. Second through hole; 246. Third through hole; 25. Second grille assembly; 251. Second support plate; 252. Second overlapping plate; 253. Second I-beam; 254. Fourth through hole; 255. Fifth through hole; 30. Cover plate; 31. Lifting hole; 32. Reinforcing rib plate. Detailed Implementation

[0029] 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.

[0030] like Figures 1-15 As shown in the figure, this application discloses a flow channel type explosion suppression isolation and protective barrier based on I-beam profile, including a concrete base 10, a protective grid 20 and a cover plate 30.

[0031] 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. The concrete base 10 consists of two layers, including a concrete base slab 14 at the bottom, on which the installation base 15 is mounted. Both the concrete base slab 14 and the installation 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 installation base 15 is flush with the factory floor level, and the area on the concrete base slab 14 outside the installation base 15 is filled with concrete or plain soil to ensure that the concrete base 10 is integrated with the factory ground and does not affect the factory layout.

[0032] 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.

[0033] The protective grille 20 includes a base 21, a top seat 22, and two rows of I-beam profiles 23. The base 21 and top seat 22 are arranged vertically at intervals, and the base 21 is detachably mounted on the base plate 12. The I-beam profiles 23 are made of steel, aluminum alloy, or other materials with sufficient strength, such as I-beams or I-beam aluminum, with an I-shaped cross-section. The two rows of I-beam profiles 23 are arranged at intervals along the length of the base plate 12. The length of the I-beam profiles 23 is perpendicular to the surface of the base plate 12, and the two side flanges of the same row of I-beam profiles 23 are coplanar, meaning the I-beam profiles 23 are vertically arranged on the base plate 12, forming a protective surface through the flanges of the I-beam profiles 23. The upper and lower ends of the two rows of I-beam profiles 23 are welded and fixed to the base 21 and top seat 22, respectively, thus forming a solid whole.

[0034] Specifically, the arrangement is as follows: two rows of I-beams 23 are staggered, and the interval between two adjacent I-beams 23 in the same row is less than the width of the I-beam 23 and greater than the thickness of the web of the I-beam 23. This allows the inner flange of each row of I-beams 23 to be inserted between the two flanges of the other row of I-beams 23, forming a cross-protection structure that can be used to resist the explosive fragments generated by the explosion and attenuate the explosive shock wave and the explosive fireball.

[0035] By staggering the two rows of I-beams 23, the flanges of the two rows of I-beams 23 are misaligned, forming four layers of metal protection. In this embodiment, the protective barrier is generally installed 1 meter from the blast origin, capable of capturing and blocking blast fragments flying at a dispersion angle of 0° to 25°, such as... Figure 9 As shown. At 25°, there are 4 penetration-resistant metal layers: the center of the upper flange of the I-beam 23, the solid web, the lower flange, and the lower flange of the adjacent I-beam 23. At 20°, there are 3 penetration-resistant metal layers. At 15°, there are 4 penetration-resistant metal layers. At 10°, there are 2 penetration-resistant metal layers. At 5°, there are 3 penetration-resistant metal layers.

[0036] However, due to the typical fragment size of hazardous flammable and explosive materials production equipment, the fragment size is generally 1cm×2cm to 5cm×10cm, and the thickness is 1cm to 4cm. The large frontal area of ​​the fragments generally results in lower penetration efficiency compared to pre-formed fragments. Due to the characteristics of the fragment geometry, it is difficult for fragments to penetrate the "minimum protection layer" in a straight line. Most fragments will have their re-entry flight path and attitude affected by the first impact penetration, leading to a collision with the adjacent I-beam 23 flange (resulting in a second collision). Therefore, even with the most extreme fragment dispersion angle of 10°, the actual number of penetration-resistant metal layers is three. Thus, the minimum effective number of penetration-resistant metal layers in this explosion suppression isolation barrier is three, with each metal layer averaging approximately 5mm thick, or 15mm thick. Based on the calculation formula for the required thickness of the anti-penetration layer under the penetration of explosive fragments, a 15mm thick Q235 steel plate can protect against explosive fragments of typical steel equipment with dimensions of 3cm×3cm×5cm and a velocity of 500m / s. It can meet the anti-penetration protection requirements of accidental explosive fragments in the production process of general hazardous flammable and explosive materials.

[0037] The two rows of I-beams 23 intersect to form a bent flow channel, which creates multiple obstacles in the propagation path of the explosion shock wave. This prevents the shock wave generated by the explosion from passing directly through the protective grid 20. Part of it is reflected back by the explosion-facing surface of the protective grid 20, and part of it enters the flow channel formed by the two rows of I-beams 23, where it is continuously reflected and diffracted. This results in a significant conversion of the internal energy of the shock wave, effectively dissipating the internal energy of the explosion shock wave that passes through the protective grid 20, and effectively attenuating the overpressure peak value of the explosion shock wave and the thermal radiation value of the explosion fireball.

[0038] When the blast shock wave enters the flow channel of the protective grid 20, it can be divided into 8 stages: ①→②→③→④→⑤→⑥→③→④, producing 6 types of phenomena: ① interception at the contact point, ② entering a narrow opening, ③ propagation in an L-shaped flow channel, ④ entering a large space through the pipe, ⑤ propagation along a straight pipe, ⑥ entering a narrow opening, ⑦ propagation in an L-shaped flow channel, and ⑧ entering a large space through the pipe. Figure 10 As shown.

[0039] The analysis is based on the stages of the explosion shock wave propagation within the flow channel structure as follows:

[0040] Stage ① The blast shock wave was intercepted at the contact point with the surface of the I-beam 23.

[0041] like Figure 11 As shown, the incident blast shock wave contacts the surface of the protective grid 20 and accumulates on the grid surface, forming a reflected shock wave that propagates in the direction of the incoming wave. Simultaneously, the incident shock wave front gradually advances towards the rigid body surface and continues to propagate horizontally along the surface. Some of the gas molecules on the reflected shock wave front, under the influence of a velocity difference created by a strong deflection force, move parallel to the rigid body surface and form a shear layer. Within this shear layer, the laminar flow is disturbed by the velocity difference, forming vortices. Gas molecules within these vortices rub against each other, continuously converting internal energy into heat and kinetic energy, achieving local energy dissipation. This gradually develops into a Mach rod wave, intersecting with the incident and reflected waves at a three-wave point, and forming local energy enhancement phenomena such as a three-wave point slip surface during propagation. During this process, a portion of the blast shock wave forms a reflected shock wave that propagates in the direction of the incoming wave, thus "diverting" the continuously propagating energy and achieving overall energy attenuation.

[0042] Phase ② The blast shockwave enters the narrow opening upon encountering the 23rd flange of the right-side I-beam profile.

[0043] like Figure 12 As shown, during the process of the blast shock wave entering a confined space, shock wave reflection, superposition, and vortex phenomena occur, resulting in local energy enhancement but overall energy attenuation. This energy attenuation is mainly based on the following aspects:

[0044] 1) Reflection mechanism: When a shock wave strikes a rigid wall at a certain angle, regular reflection occurs; as the incident angle increases, it transforms into Mach reflection, forming a stronger composite shock wave (Mach rod). In complex and narrow channels, these two types of reflection may occur alternately or simultaneously, thus amplifying the local energy.

[0045] 2) Catching and Superposition: In curved or bifurcated flow channels, subsequent reflected waves may catch up with the previous main incident wavefront. Since shock waves are compression waves, the catching and superposition of subsequent waves can cause a sudden increase in pressure, density, and particle velocity at the wavefront. This is similar to the "shock focusing" or "detonation focusing" effect in acoustics, resulting in local energy amplification.

[0046] 3) Reduction in Channel Cross-sectional Area: According to one-dimensional flow theory, under instantaneous impact, a boundary layer also exists on the channel wall. The thickness of the boundary layer reduces the cross-sectional area available for shock wave propagation. Since the shock wave is approximately a non-viscous fluid, its propagation within the channel primarily involves the retention of continuously entering gas molecules in the form of vortices. These briefly retained gas molecules collide and rub within the vortices, converting their internal energy into heat energy, which is then transferred to the metal channel structure. This results in localized energy dissipation along the shock wave propagation path and a reduction in the local gas molecule propagation velocity. This effect is somewhat similar to the boundary layer of a viscous fluid, reducing the effective diameter of the high-speed passage within the cross-section. When the shock wave enters a 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 a result of wave energy convergence and compression caused by geometric constraints—a localized intensification phenomenon.

[0047] 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 and slowly completes entropy increase thereafter.

[0048] 5) Energy dissipation in the rarefaction region: When a shock wave bypasses a corner or passes through a narrow opening, the wavefront rapidly expands outwards. This expansion generates a series of expansion waves (i.e., the high-pressure medium accelerates towards the explosion center under the action of the pressure gradient force, also known as rarefaction waves). When the reflected shock wave catches up with the initial incident shock wave, it must pass through the low-pressure region of the rarefaction wave (rare region). After the wavefront of the reflected shock wave invades the low-pressure, low-density rarefaction region, it causes a decrease in the pressure and velocity of the wavefront of the reflected shock wave. That is, the rarefaction wave "dilutes" and "disperses" the energy of the reflected wave, resulting in energy dissipation.

[0049] Stage ③ The explosion shock wave propagates in the L-shaped flow channel.

[0050] like Figure 13 As shown, the propagation process of the shock wave within the L-shaped flow channel can actually be broken down into stage ② and stage ①, with the addition of a rigid surface reflection. During this process, reflection mechanisms, pursuit and superposition, the effect of reduced flow channel cross-sectional area, wall friction and heat conduction (dissipation), and energy dissipation in the rarefaction region also occur. The internal energy of the shock wave is converted into heat energy and conducted to the flow channel's metallic material for "storage," while simultaneously inducing a high-frequency vibration response in the flow channel structure, thus achieving energy consumption.

[0051] Phase 4: The blast shockwave enters the large space through the pipes.

[0052] like Figure 14 As shown, the process of the shock wave propagating from the pipe into the large space can actually be regarded as the final stage of stage ②. In this process, at the instant the wavefront bursts out of the narrow channel and enters the large space, the shock wave front will rapidly spread out from a small cross section, causing the energy (energy density) per unit area to drop sharply, while the energy density is diluted as the wavefront area increases. At the same time, at the instant the locally intensified shock wave bursts out of the narrow channel and enters the large space, the presence of the shear layer and rarefaction wave (rare region) will also cause the high-pressure region and the rarefaction region (low-pressure region) to undergo shearing and torsion under the force couple of shear force and rarefaction wave impact force (opposite direction), forming a velocity difference, which in turn disturbs the laminar flow and forms vortices. Since the shear force is greater than the rarefaction wave impact force, and as the shock wave front develops, the rarefaction region will be extended, which will cause vortices to be continuously generated and, under the shear impact, detach from the vortex bed (narrow channel port) and continue to propagate along the shock wave direction. During this process, the internal energy of the shock wave is converted into heat energy and conducted to the flow channel metal material and the low-pressure undisturbed air at the front end for "storage". At the same time, it causes high-frequency vibration response of the flow channel structure, thus realizing energy consumption.

[0053] Stage 5: The blast shock wave propagates along the straight pipe.

[0054] like Figure 15 As shown, before the shock wave propagates within the straight pipe, it is induced by multiple obstacles, causing mechanical instability in the high-pressure gas molecules. This transforms the explosion shock wave from an approximately inviscid fluid dominated by the Mach number into a viscous fluid dominated by the Reynolds number. When a viscous fluid propagates within a confined space, it is affected by the Reynolds number, forming a boundary layer on the surface of the wall along the propagation path. The formation of the boundary layer reduces the diameter of the flow channel within the confined space, increasing the velocity and pressure of the gas molecules during propagation. Although the reduction in the cross-sectional area of ​​the flow channel has a relatively weak attenuation effect on the shock wave, the friction between the high-pressure gas molecules and the wall converts some of the internal energy into heat energy. This heat energy is conducted to the metal material of the flow channel for "storage," while simultaneously causing a high-frequency vibration response in the flow channel structure, thus dissipating the energy.

[0055] Stage 6: The shockwave from the explosion enters the narrow opening.

[0056] Its process is similar to stage ①.

[0057] Therefore, when an explosion occurs, the shock wave enters the flow channel of the protective grid 20 and propagates through 8 stages, which prolongs the propagation distance and duration of the shock wave, causing the energy of the shock wave to be greatly attenuated, thereby achieving the expected protective effect.

[0058] Further configuration: 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 in parallel at intervals. A row of first I-beams 243 is arranged at intervals along the length direction between the first support plate 241 and the first overlapping plate 242. The first support plate 241 is made of 10mm thick wide steel plate, and the first overlapping plate 242 is made of 10mm thick narrow steel plate. The first I-beams 243 can be made of hot-rolled ordinary I-beams of grade Q235 or aluminum alloy and other metal profiles. The two ends of the first I-beams 243 are connected to the first support plate 241 and the first overlapping plate 242 by welding. One side flange of the first I-beam 243 is coplanar with the corresponding side of the first support plate 241 and the first overlapping plate 242, such that one side of the first I-beam 243 flange, the first support plate 241, and the first overlapping plate 242 are arranged coplanarly. During installation, this coplanar side is positioned on the outer side. The width of the first support plate 241 is greater than or equal to the sum of the height of the first I-beam 243 and the width of the first overlapping plate 242. The width of the first overlapping plate 242 is less than the height of the first I-beam 243 by at least one thickness of the flange of the first I-beam 243, thereby ensuring that the two sets of grid components can be interlocked to form an interlaced layout.

[0059] The second grid assembly 25 includes a second support plate 251, a second overlapping plate 252, and a row of second I-beams 253. Its overall structure is mirror-symmetrical to the first grid assembly 24. During installation, the second grid assembly 25 is vertically rotated 180° and then inserted into the first grid assembly 24 and fixed with bolts to form a protective grid 20. The first support plate 241 and the second overlapping plate 252 are attached to form a base 21, and the first overlapping plate 242 and the second support plate 251 are attached to form a top seat 22.

[0060] Furthermore, a first through hole 244 and a second through hole 245 are respectively formed on the first support plate 241 and the first overlapping plate 242, located between two adjacent first I-beams 243. A third through hole 246 is formed on the side of the first support plate 241 away from the first through hole 244, and the center of symmetry is the center point of the first support plate 241. A fourth through hole 254 corresponding to the second through hole 245 is formed on the second support plate 251, and a fifth through hole 255 corresponding to the third through hole 246 is formed on the second overlapping plate 252. Two rows of screws 13 are provided on the base plate 12 corresponding to the first through hole 244 and the third through hole 246. The screws 13 are ordinary high-strength M24 studs welded to the base plate 12 to facilitate the connection between the protective grille 20 and the base plate 12. During installation, first lift the first grid assembly 24, align the first through hole 244 and the third through hole 246 on the first support plate 241 of the first grid assembly 24 with the screw 13 on the base plate 12, and lower the first grid assembly 24 so that the first support plate 241 of the first grid assembly 24 is in contact with the base plate 12. Then lift the second grid assembly 25, with the second overlapping plate 252 of the second grid assembly 25 facing downwards, insert the second I-beam 253 of the second grid assembly 25 into the first I-beam 243 of the first grid assembly 24, and align the fourth through hole 254 on the second overlapping plate 252 of the second grid assembly 25 with the corresponding screw 13 on the base plate 12. Fit the fourth through hole 254 onto the screw 13 and align the second overlapping plate 252 with the first grid assembly 24. The first support plate 241 of component 24 is attached, and an M24 nut is screwed onto 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 grille 20. Then, the fifth through hole 255 on the second support plate 251 of the second grille assembly 25 is aligned with the second through hole 245 on the first overlapping plate 242 of the first grille assembly 24 and connected using M24 bolts. Finally, the M24 nut and M24 bolt are tightened to achieve a secure connection, thereby fastening the first overlapping plate 242 and the second support plate 251 to form the top seat 22 of the protective grille 20. In this way, the first grille assembly 24 and the second grille assembly 25 can be spliced ​​together to form the protective grille 20 and the protective grille 20 can be detachably fixed to the base plate 12. By using two sets of grille assemblies to splice the protective grille 20, the weight of each set of grille assemblies can be controlled within 250kg, allowing four people to move it. 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.

[0061] The cover plate 30 is used to cover the mounting groove 11. The size of the cover plate 30 is the same as the size of the groove 11, and the upper surface of the cover plate 30 is flush with the upper surface of the mounting groove 11 and the ground surface. When the plant process is adjusted so that the protective barrier is no longer needed in the original location, the protective grid 20 can be removed, and then the cover plate 30 can be placed in the mounting groove 11 to ensure that the base is flush with the ground. When the protective barrier needs to be redeployed, the cover plate 30 can be opened and the protective grid 20 can be installed. The cover plate 30 is a box-shaped structure with an open bottom. Several reinforcing ribs 32 are arranged in a crisscross pattern 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 31 are opened at each end of the cover plate 30. The lifting hole 31 is a countersunk bolt hole. After the cover plate 30 is installed in the mounting groove 11, the lifting hole 31 can be sealed with countersunk bolts to prevent dangerous materials or impurities from entering.

[0062] This application also verifies the protective performance of the retaining wall through experiments. Two pen-type overpressure sensors, measuring points 1 and 2, are installed on the back of the retaining wall to measure the overpressure of transmitted and diffracted shock waves, thereby assessing the attenuation effect of the retaining wall on the shock waves. Simultaneously, two pen-type overpressure sensors, measuring points 3 and 4, are installed on the face of the retaining wall facing the blast, to measure the overpressure of reflected shock waves, thereby assessing the reflection effect of the retaining wall on the overpressure of the shock waves.

[0063] An experimental group and a control group were set up. The experimental group consisted of a blast-suppressing isolation protective barrier as described in this embodiment, while the control group consisted of an open space without the blast-suppressing isolation protective barrier as described in this embodiment. Five tests were conducted in each group. The locations of the explosion centers and the arrangement parameters of each measuring point in the five tests are shown in the table below:

[0064] Table 1: Location of the explosion center and layout parameters of each measuring point in the 5 tests

[0065] After the experiment was completed, the peak overpressure data of the shock wave at each measuring point were obtained as shown in the table below:

[0066] Table 2: Peak Overpressure Data of Shock Waves at Various Measuring Points in the Experimental Group

[0067]

[0068] Table 3: Shock wave overpressure peak values ​​at various measuring points in the control group

[0069] Based on the above data analysis, it can be concluded that the explosion-suppressing isolation and protective barrier in this embodiment can significantly reduce the overpressure of the shock wave and play a good protective role.

[0070] 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 flow channel type explosion suppression and isolation protective barrier based on I-beam profiles, characterized in that: The system includes a pre-embedded concrete base (10) and a protective grid (20). The concrete base (10) is provided with an installation groove (11). The bottom of the installation groove (11) is provided with a base plate (12). The protective grid (20) includes a base (21) and a top plate (22) arranged at intervals. The base (21) is detachably mounted on the base plate (12). Two rows of I-beams (23) are arranged at intervals along the length of the base plate (12) between the base (21) and the top plate (22). The length of the I-beams (23) is perpendicular to the surface of the base plate (12), and the two side flanges of the same row of I-beams (23) are coplanar. The two rows of I-beams (23) are staggered, and the interval between two adjacent I-beams (23) in the same row is less than the width of the I-beam (23) and greater than the thickness of the web of the I-beam (23).

2. The flow channel type explosion suppression and isolation protective barrier based on I-beam profiles according to claim 1, 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 in parallel. A row of first I-beams (243) spaced along the length of the base plate (12) is provided between the first support plate (241) and the first overlapping plate (242). One side flange of the first I-beam (243) is coplanar with the corresponding side of the first support plate (241) and the first overlapping plate (242). The width of the first support plate (241) is greater than or equal to the sum of the height of the first I-beam (243) and the width of the first overlapping plate (242). The width of the first lap plate (242) is smaller than the height of the first I-beam (243) by at least the thickness of the flange of the first I-beam (243). The second grid assembly (25) includes a second support plate (251), a second lap plate (252) and a row of second I-beams (253). 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) to form a protective grid (20). The first support plate (241) and the second lap plate (252) are attached to form a base (21). The first lap plate (242) and the second support plate (251) are attached to form a top seat (22).

3. The flow channel type explosion suppression and isolation protective barrier based on I-beam profiles according to claim 2, characterized in that: The first support plate (241) and the first overlapping plate (242) are respectively provided with a first through hole (244) and a second through hole (245) located between two adjacent first I-beams (243). The first support plate (241) is provided with a third through hole (246) that is centrally symmetrical with the first through hole (244) on the side away from the first through hole (244). The base plate (12) is provided with two rows of screws (13) corresponding to the first through hole (244) and the third through hole (246). The second support plate (251) is provided with a fourth through hole (254) that corresponds to the second through hole (245). The second overlapping plate (252) is provided with a fifth through hole (255) that corresponds to the third through hole (246).

4. The flow channel type explosion suppression and isolation protective barrier based on I-beam profiles according to claim 1, characterized in that: It also includes a cover plate (30) for covering the mounting groove (11), the size of the cover plate (30) being the same as the size of the groove cavity of the mounting groove (11), and two lifting holes (31) being provided at each end of the cover plate (30).

5. A flow channel type explosion suppression and isolation protective barrier based on I-beam profiles according to claim 4, characterized in that: The cover plate (30) is a box-shaped structure with an open bottom, and a number of reinforcing ribs (32) are arranged in a crisscross pattern inside the box-shaped cavity.

6. A flow channel type explosion suppression and isolation protective barrier based on I-beam profiles according to claim 4, characterized in that: The lifting hole (31) is a countersunk bolt hole.

7. A flow channel type explosion suppression and isolation protective barrier based on I-beam profiles according to claim 1, 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).

Images