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 runner type explosion suppression isolation protection retaining wall based on Z-shaped profiles, which comprises a pre-embedded 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, and the protection grating comprises a base and a top seat which are arranged at an interval up and down; the base is detachably arranged on the base plate, a plurality of Z-shaped profiles with the length direction perpendicular to the plate face of the base plate are arranged between the base and the top seat, the included angle between the width direction of webs of the Z-shaped profiles and the width direction of the base plate is 30 degrees, and the Z-shaped profiles are alternately arranged in a row in the length direction of the base plate. The protective grating is detachably arranged in the concrete base, so that the protective grating is not influenced by an existing protective structure during on-site transformation, and the construction difficulty, the construction cost and the period of on-site transformation are reduced; by means of alternative arrangement of the Z-shaped profiles, explosion fragments generated by explosion can be resisted, and the overpressure value of explosion shock waves and the thermal radiation value of explosion fireballs can be attenuated.

Description

Technical Field

[0001] This invention relates to the field of explosion suppression and protection technology, and in particular to a flow channel type explosion suppression and isolation protective barrier based on Z-shaped profiles. Background Technology

[0002] Hazardous flammable and explosive materials are highly sensitive; accidental friction, impact, static electricity, and other external stimuli during the production process can cause them to ignite and explode. To control the spread of accidental combustion and explosion accidents during the production of hazardous flammable and explosive materials and to reduce casualties and property damage, reinforced concrete protective structures are mostly used at production sites to protect against blast waves, fragments, and heat radiation.

[0003] However, reinforced concrete protective structures have long construction cycles, high costs, and are immovable. When it is necessary to carry out technological modifications or upgrades to production lines for hazardous flammable and explosive materials, modifications can only be made within the existing spatial layout of the reinforced concrete protective structure, severely restricting the process layout of the new production line. If the layout needs to be adjusted or the site space expanded, the original reinforced concrete protective structure must be demolished, and a new reinforced concrete protective structure must be constructed according to the new spatial layout. This greatly increases construction costs and time, significantly impacting the industrial layout. In addition, reinforced concrete protective structures are mostly connected to the main structure of the factory building under stress, making direct demolition difficult and challenging. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a flow channel type explosion suppression and isolation protective barrier based on Z-shaped profiles.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a flow channel type explosion-proof isolation and protective barrier based on Z-shaped profiles, comprising a pre-embedded concrete base and a protective grid, wherein an installation groove is provided in the concrete base, and a base plate is provided at the bottom of the installation groove; the protective grid comprises a base and a top plate arranged at intervals above and below, wherein the base is detachably mounted on the base plate; and a plurality of Z-shaped profiles with their length direction perpendicular to the surface of the base plate are provided between the base and the top plate, wherein the width direction of the web of the Z-shaped profile forms a 30° angle with the width direction of the base plate, and the plurality of Z-shaped profiles are arranged alternately in a row along the length direction of the base plate.

[0006] 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 or equal to half the width of the first support plate and is arranged on one side of the first support plate. A row of first Z-shaped steels is arranged at intervals along the length direction of the substrate between the first support plate and the first overlapping plate. The width direction of the web of the first Z-shaped steel forms a 30° angle with the width direction of the substrate, and the central symmetrical points of the first Z-shaped steels are all distributed on the center line of the substrate. The gap between two adjacent first Z-shaped steels is less than the projection distance of the first Z-shaped steels in the length direction of the substrate. The second grille assembly includes a second support plate, a second overlapping plate, and a row of second Z-shaped steels. 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 to form a protective grille. The first support plate and the second overlapping plate are attached to form a base, and the first overlapping plate and the second support plate are attached to form a top seat.

[0007] Furthermore, the first lap plate is provided with a plurality of first clearance grooves to avoid the second Z-shaped steel, and the second lap plate is provided with a plurality of second clearance grooves to avoid the first Z-shaped steel.

[0008] Furthermore, a first receiving groove is provided at the end of the first Z-shaped steel away from the first support plate, and the body of the first overlapping plate is arranged in the first receiving groove and the surface of the first overlapping plate is flush with the end face of the first Z-shaped steel away from the first support plate. A second receiving groove is provided at the end of the second Z-shaped steel away from the second support plate, and the body of the second overlapping plate is arranged in the second receiving groove and the surface of the second overlapping plate is flush with the end face of the second Z-shaped steel away from the second support plate.

[0009] Furthermore, a row of corresponding first through holes and a row of second through holes are respectively provided on the first support plate and the first overlapping plate. A row of third through holes that are centrally symmetrical with the first through holes are provided on the side of the first support plate away from the first through holes. Two rows of screws are provided on the substrate corresponding to the first through holes and the third through holes. A row of fourth through holes corresponding to the second through holes are provided on the second support plate, and a row of fifth through holes corresponding to the third through holes are provided on the second overlapping plate.

[0010] Furthermore, it also includes a cover plate for covering the mounting groove, the size of which is the same as the size of the mounting groove cavity, and two lifting holes are provided at each end of the cover plate.

[0011] Furthermore, the cover plate is a box-shaped structure with an open bottom, and several reinforcing ribs are arranged in a crisscross pattern inside the box-shaped cavity. The upper surface of the cover plate is flush with the upper surface of the mounting groove and the ground surface.

[0012] 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.

[0013] In summary, the present invention has the following beneficial effects:

[0014] 1. In this application, a concrete base is set up and 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 set on the base plate of the concrete base through the base, so that the entire protective grid can be disassembled. In this way, the existing protective retaining wall structure can be ignored during on-site modification, and the construction difficulty, construction cost and construction period of on-site modification are greatly reduced.

[0015] 2. In this application, a protective wall is formed by a base, a top seat, and a row of alternating Z-shaped profiles. On the one hand, the alternating arrangement of the Z-shaped profiles ensures that there are no direct gaps in the vertical plane of the protective wall, which can be used to resist the explosive fragments generated by the explosion. On the other hand, it forms a curved airflow channel in the horizontal section, causing the explosive shock wave to undergo complex reflection and flow around the airflow channel. 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. This transforms the explosive shock wave from a Mach number-dominated, approximately inviscid fluid into a Reynolds number-dominated, viscous fluid, gradually forming a large amount of disordered turbulence during its propagation within the flow channel. 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 explosive shock wave, thereby attenuating the overpressure value of the explosive shock wave and the thermal radiation value of the explosive fireball. 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 structure of the protective grille according to an embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional schematic diagram of the protective grille according to an embodiment of the present invention;

[0019] Figure 4 This is an exploded structural diagram of the protective grille according to an embodiment of the present invention;

[0020] Figure 5 This is a comparative schematic diagram of the structures of the first grille assembly and the second grille assembly according to an embodiment of the present invention;

[0021] Figure 6This is a schematic diagram of the concrete base structure according to an embodiment of the present invention;

[0022] 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;

[0023] Figure 8 This is a schematic diagram of the cover plate in 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 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;

[0026] 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 contact portion of the Z-shaped profile flange and the rigid surface of the material, according to an embodiment of the present invention.

[0027] Figure 12 This is a schematic diagram illustrating the evolution of the explosion shock wave propagating along the rigid surface of the Z-shaped profile flange according to an embodiment of the present invention;

[0028] Figure 13 This is a schematic diagram illustrating the evolution of the explosion shock wave propagating in a straight flow channel according to an embodiment of the present invention;

[0029] Figure 14 This is a schematic diagram illustrating the evolution of the explosion shock wave entering a large space from a pipe, according to an embodiment of the present invention.

[0030] 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. Z-shaped profile; 24. First grille assembly; 241. First support plate; 242. First overlapping plate; 243. First Z-shaped steel; 244. First clearance groove; 245. First receiving groove; 246. First through hole; 247. Second through hole; 248. Third through hole; 25. Second grille assembly; 251. Second support plate; 252. Second overlapping plate; 253. Second Z-shaped steel; 254. Second clearance groove; 255. Second receiving groove; 256. Fourth through hole; 257. Fifth through hole; 30. Cover plate; 31. Lifting hole; 32. Reinforcing rib plate. Detailed Implementation

[0031] 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.

[0032] like Figure 1-14 As shown in the figure, this application discloses a flow channel type explosion suppression isolation and protective barrier based on Z-shaped profile, including a concrete base 10, a protective grid 20 and a cover plate 30.

[0033] 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.

[0034] 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 is provided at the bottom of the installation groove 11 for connecting the protective grid 20. The base plate 12 is a 10mm thick steel plate. 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 base plate 12 is connected to the steel bars in the reinforced concrete foundation by the anchor bars, thereby firmly fixing the base plate 12 in the installation groove 11 of the mounting base 15, ensuring the bottom stability of the protective grid 20 after installation.

[0035] The protective grille 20 includes a base 21 and a top seat 22 arranged at intervals. Between the base 21 and the top seat 22 are several Z-shaped profiles 23, whose length direction is perpendicular to the surface of the base plate 12. The Z-shaped profiles 23 are made of steel, aluminum alloy, or other materials with sufficient strength, such as I-beams or I-shaped aluminum profiles, with a Z-shaped cross-section. The upper and lower ends of the Z-shaped profiles 23 are welded and fixed to the base 21 and the top seat 22, thus forming the overall protective structure of the protective grille 20. The base 21 is detachably mounted on the base plate 12, allowing the entire protective grille 20 to be detachably mounted on the base plate 12 for easy disassembly and replacement.

[0036] In the arrangement, the width direction of the web of the Z-shaped profile 23 forms a 30° angle with the width direction of the base plate 12, and several Z-shaped profiles 23 are arranged alternately in a row along the length direction of the base plate 12. Through the oblique and alternating arrangement of the Z-shaped profiles 23, the flanges of the Z-shaped profiles 23 are staggered, thus eliminating direct gaps in the vertical plane and allowing them to withstand explosive fragments generated by an explosion. In this embodiment, the protective barrier is generally installed 1m away from the explosion origin and can capture and withstand explosive fragments flying at a dispersion angle of 0° to 25°. Figure 9 As shown. At 25°, there is one penetration-resistant metal layer, namely the web of Z-shaped profile 23. At 20°, there are two penetration-resistant metal layers, namely the right flange and the left flange of Z-shaped profile 23. At 15°, there are two penetration-resistant metal layers, namely the right flange and the left flange of Z-shaped profile 23. At 10°, there is one penetration-resistant metal layer, namely the web of Z-shaped profile 23. At 5°, there is one penetration-resistant metal layer, namely the web of Z-shaped profile 23. The average thickness of each metal layer is approximately 6mm. Therefore, the minimum protection thickness is 6mm. However, due to the typical fragment size of hazardous flammable and explosive materials production equipment, which is generally 1cm×2cm to 5cm×10cm and the thickness is 1cm to 4cm, the fragment frontal area is large, and the penetration efficiency is generally lower than that of pre-formed fragments. Due to the geometric characteristics of the fragments, they cannot penetrate the "minimum protection layer" in a straight line. Most fragments will have their flight path affected by the first impact, subsequently colliding with the adjacent Z-shaped flange 23 (second impact). Therefore, at the most extreme scattering angles of 25°, 10°, and 5°, the actual number of penetration-resistant metal layers is two. Thus, the minimum effective number of penetration-resistant metal layers for this explosion-suppressing isolation barrier is two, i.e., 12mm thick. Based on the calculation formula for the required penetration-resistant layer thickness of a structure under explosive fragment penetration, a 12mm thick Q235 steel plate can protect against explosive fragments from typical steel equipment with dimensions of 3cm × 3cm × 5cm and a velocity of 430m / s, meeting the penetration protection requirements for accidental explosions in general hazardous flammable and explosive production processes.

[0037] Furthermore, the alternating arrangement of the Z-shaped profiles 23 forms a bent airflow channel on the horizontal cross-section, causing the explosion shock wave to undergo complex reflection and flow around the airflow channel. This results in the shock wave continuously "expanding," "compressing," and "converging" due to the synchronous formation of sparse regions, shear layers, boundary layers, and vortices. This transforms the explosion shock wave from a Mach number-dominated inviscid fluid into a Reynolds number-dominated viscous fluid, gradually forming a large amount of disordered turbulence during propagation within the flow channel. Ultimately, kinetic energy is converted into thermal energy at the microscale through viscous dissipation, 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.

[0038] When the blast shock wave enters the bent flow channel formed by the Z-shaped profile 23 of the protective grid 20, it can be divided into 7 stages: ①→②→①→③→①→④→②, producing 4 types of phenomena: ① the rigid surface contact portion is intercepted; ② it propagates along the rigid surface (partial interception); ③ it propagates in the straight flow channel; ④ it enters a large space from the flow channel, such as... 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] Phase ① The blast shockwave was intercepted at the contact point between the rigid surface of the Z-shaped profile 23 flange.

[0041] like Figure 11 As shown, the incident blast shock wave contacts the rigid body surface (the surface of flange 23 of the Z-shaped profile) and accumulates on the 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 it. 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, 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 localized energy dissipation. This gradually develops into a Mach rod wave, intersecting with the incident and reflected waves at a three-wave point. During propagation, localized energy enhancement continuously occurs along the slip surface (shear layer) of the three-wave point. In 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] Stage ② The blast shock wave propagates along the rigid surface of the 23rd flange of the Z-shaped profile.

[0043] like Figure 12 As shown, when the shock wave front contacts the web of the left-side Z-shaped profile 23, the web forms an angle with the direction of shock wave propagation (it is not parallel to the direction of shock wave propagation). Therefore, during the propagation of the shock wave along the web of the Z-shaped profile 23, reflection, pursuit, and superposition phenomena occur, and Mach waves are formed locally, resulting in local energy enhancement, but the overall energy is attenuated. This energy attenuation is mainly based on the following aspects.

[0044] 1) Reflection mechanism: When a shock wave impacts a rigid wall at a certain angle, regular reflection occurs; as the incident angle or the peak overpressure 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, resulting in local energy amplification.

[0045] 2) Pursuit and superposition: On the rigid surface of the web of the Z-shaped profile 23, the subsequent reflected wave will catch up with the previous main incident wave front. Since the shock wave is a compression wave, the pursuit and superposition of the subsequent wave will cause a sudden increase in pressure, density and particle velocity at the wave front, resulting in local energy enhancement.

[0046] 3) 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.

[0047] 4) 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.

[0048] Stage ③ The explosion shock wave propagates in the straight flow channel.

[0049] like Figure 13 As shown, the propagation process of the shock wave within the straight flow channel between two adjacent Z-shaped profiles 23 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 sparse region also exist. Meanwhile, 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 a near-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.

[0050] Phase 4: The blast shockwave enters the large space through the pipes.

[0051] like Figure 14As shown, during the propagation of the blast shock wave from the pipe into the large space, the moment the wavefront bursts out of the narrow channel and enters the large space, the shock wave front rapidly expands from a small cross-section, causing a sharp drop in energy (energy density) per unit area. The energy density is diluted as the wavefront area increases. The internal energy of the shock wave is converted into heat energy and conducted into the flow channel's metal material for "storage," while simultaneously causing a high-frequency vibration response in the flow channel structure, thus dissipating energy. At the same time, the locally intensified shock wave bursting out of the narrow channel and entering the large space will also experience shearing and torsion between the high-pressure region and the rarefaction region (low-pressure region) due to the presence of shear layers and rarefaction waves (rare regions). This creates a velocity difference, causing disturbance between the shear layers and forming vortices. Since the shear force is greater than the rarefaction wave impact force, and the rarefaction region extends as the shock wave front develops, vortices are continuously generated and, under shear impact, detach from the vortex bed (narrow channel port) and continue propagating 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.

[0052] When an explosion occurs, the shock wave enters the flow channel of the protective grid 20 and propagates through 7 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.

[0053] A further configuration is provided, whereby 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 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. The width of the first overlapping plate 242 is less than or equal to half the width of the first support plate 241 and is arranged on one side of the first support plate 241. In this embodiment, it is preferred that the width of the first overlapping plate 242 is half the width of the first support plate 241, and the two sides of the first overlapping plate 242 are aligned with one side and the centerline of the first support plate 241, respectively. A row of first Z-shaped steel bars 243 are arranged at intervals along the length of the base plate 12 between the first support plate 241 and the first overlapping plate 242. The first Z-shaped steel bars 243 can be made of Z-shaped steel cold-bent from Q235 hot-rolled steel or aluminum alloy and other metal profiles, with dimensions of h×b×c×t=120mm×80mm×0mm×6mm. During arrangement, the width direction of the web of the first Z-shaped steel bar 243 forms a 30° angle with the width direction of the base plate 12, and the central symmetrical points of the first Z-shaped steel bars 243 are all distributed on the centerline of the base plate 12. The gap between two adjacent first Z-shaped steel bars 243 is less than the projection distance of the first Z-shaped steel bars 243 in the length direction of the base plate 12, so that there can be no gap in the vertical plane after assembly.

[0054] The second grid assembly 25 includes a second support plate 251, a second overlapping plate 252, and a row of second Z-shaped steel bars 253. The materials and dimensions of the second support plate 251, the second overlapping plate 252, and the second Z-shaped steel bars 253 are the same as those of the first support plate 241, the first overlapping plate 242, and the first Z-shaped steel bars 243. The overall structural arrangement of the second grid assembly 25 is mirror-symmetrical to that of the first grid assembly 24. During installation, the second grid assembly 25 is rotated vertically by 180° and then inserted into the first grid assembly 24 to form a protective grid 20. The first support plate 241 and the second overlapping plate 252 are fitted together to form a base 21, and the first overlapping plate 242 and the second support plate 251 are fitted together to form a top seat 22.

[0055] To ensure smooth insertion, several first clearance grooves 244 are provided on the first lap plate 242 to avoid the second Z-shaped steel 253, and several second clearance grooves 254 are provided on the second lap plate 252 to avoid the first Z-shaped steel 243. Both the first clearance grooves 244 and the second clearance grooves 254 are semi-circular grooves with their centers on the inner edge of the corresponding lap plate, allowing for avoidance of the Z-shaped steel during insertion. The semi-circular groove design also facilitates the transition of the force transmission path between components, helping to avoid stress concentration in the lap plate under explosive loads and the dynamic tensile and torsional action of the steel grating, 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 grating.

[0056] A first receiving groove 245 is provided at the end of the first Z-shaped steel 243 away from the first support plate 241. Specifically, the receiving groove is stepped, starting from the inward indentation on the side of the first Z-shaped steel 243 away from the first support plate 241, corresponding to the location of the first overlapping plate 242. A portion of the first overlapping plate 242 is arranged within the first receiving groove 245, and the surface of the first overlapping plate 242 is flush with the end face of the first Z-shaped steel 243 away from the first support plate 241. Similarly, a second receiving groove 255 is provided at the end of the second Z-shaped steel 253 away from the second support plate 251. Specifically, the receiving groove is stepped, starting from the inward indentation on the side of the second Z-shaped steel 253 away from the second support plate 251, corresponding to the location of the second overlapping plate 252. A portion of the second overlapping plate 252 is arranged within the second receiving groove 255, and the surface of the second overlapping plate 252 is flush with the end face of the second Z-shaped steel 253 away from the second support plate 251. This ensures that after the lap plate and the support plate are attached, the side of the Z-shaped steel that is away from the lap plate can also be attached to the support plate, thus ensuring that there are no gaps between the Z-shaped steel and the support plate, further guaranteeing the stability and connection strength of the overall structure.

[0057] Furthermore, a row of corresponding first through holes 246 and second through holes 247 are respectively formed on the first support plate 241 and the first overlapping plate 242. A row of third through holes 248, which are centrally symmetrical to the first through holes 246, is formed on the side of the first support plate 241 away from the first through holes 246, with the center of symmetry being the center point of the first support plate 241. A row of fourth through holes 256, which correspond to the second through holes 247, is formed on the second support plate 251, and a row of fifth through holes 257, which correspond to the third through holes 248, 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 holes 246 and the third through holes 248. The screws 13 are welded to the base plate 12 using M24 ordinary high-strength studs to facilitate the connection between the protective grille 20 and the base plate 12. During installation, first lift the first grille assembly 24, align the first through hole 246 and the third through hole 248 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 lift the second grille assembly 25, with the second overlapping plate 252 of the second grille assembly 25 facing downwards, insert the second grille assembly 25 into the first grille assembly 24, and align the fourth through hole 256 on the second overlapping plate 252 of the second grille assembly 25 with the corresponding screw 13 on the base plate 12. Fit the fourth through hole 256 onto the screw 13 and align the second overlapping plate 252 with the first support plate of the first grille assembly 24. 241 is fitted together, and an M24 nut is screwed onto the end of the screw 13, thereby securing the first support plate 241 and the second overlapping plate 252 together to form the base 21 of the protective grille 20. Then, the fifth through hole 257 on the second support plate 251 of the second grille assembly 25 is aligned with the second through hole 247 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 secure the first overlapping plate 242 and the second support plate 251 together 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 together 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.

[0058] 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.

[0059] 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-proof isolation and protective barrier based on Z-shaped 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). A number of Z-shaped profiles (23) with their length direction perpendicular to the surface of the base plate (12) are arranged between the base (21) and the top plate (22). The width direction of the web of the Z-shaped profile (23) forms a 30° angle with the width direction of the base plate (12). A number of the Z-shaped profiles (23) are arranged alternately in a row along the length direction of the base plate (12).

2. The flow channel type explosion suppression and isolation protective barrier based on Z-shaped 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 parallel to each other on the plate surface. The width of the first overlapping plate (242) is less than or equal to half the width of the first support plate (241) and is arranged on one side of the first support plate (241). A row of first Z-shaped steels (243) is arranged at intervals along the length direction of the base plate (12) between the first support plate (241) and the first overlapping plate (242). The width direction of the web of the first Z-shaped steel (243) forms a 30° angle with the width direction of the base plate (12), and the central symmetrical points of the first Z-shaped steel (243) are all distributed on the base plate. On the center line of the plate (12), the gap between two adjacent first Z-shaped steels (243) is smaller than the projection distance of the first Z-shaped steels (243) in the length direction of the substrate (12). The second grid assembly (25) includes a second support plate (251), a second overlapping plate (252) and a row of second Z-shaped steels (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 overlapping plate (252) are attached to form a base (21). The first overlapping 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 Z-shaped profiles according to claim 2, characterized in that: The first lap plate (242) is provided with a plurality of first clearance grooves (244) to avoid the second Z-shaped steel (253), and the second lap plate (252) is provided with a plurality of second clearance grooves (254) to avoid the first Z-shaped steel (243).

4. A flow channel type explosion suppression and isolation protective barrier based on Z-shaped profiles according to claim 2, characterized in that: The first Z-shaped steel (243) is provided with a first receiving groove (245) at the end away from the first support plate (241). Part of the first overlapping plate (242) is arranged in the first receiving groove (245) and the surface of the first overlapping plate (242) is flush with the end face of the first Z-shaped steel (243) away from the first support plate (241). The second Z-shaped steel (253) is provided with a second receiving groove (255) at the end away from the second support plate (251). Part of the second overlapping plate (252) is arranged in the second receiving groove (255) and the surface of the second overlapping plate (252) is flush with the end face of the second Z-shaped steel (253) away from the second support plate (251).

5. A flow channel type explosion suppression and isolation protective barrier based on Z-shaped profiles according to claim 2, characterized in that: The first support plate (241) and the first overlapping plate (242) are respectively provided with a row of corresponding first through holes (246) and second through holes (247). The first support plate (241) is provided with a row of third through holes (248) that are centrally symmetrical with the first through hole (246) on the side away from the first through hole (246). The base plate (12) is provided with two rows of screws (13) corresponding to the first through hole (246) and the third through hole (248). The second support plate (251) is provided with a row of fourth through holes (256) that correspond to the second through hole (247). The second overlapping plate (252) is provided with a row of fifth through holes (257) that correspond to the third through hole (248).

6. A flow channel type explosion suppression and isolation protective barrier based on Z-shaped 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).

7. A flow channel type explosion suppression and isolation protective barrier based on Z-shaped profiles according to claim 6, characterized in that: 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. The upper surface of the cover plate (30) is flush with the upper surface of the mounting groove (11) and the ground surface.

8. A flow channel type explosion suppression and isolation protective barrier based on Z-shaped 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).

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