Multi-tooth flow channel type explosion suppression isolation protection retaining wall based on angular 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 angular 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 and a top seat, the base is detachably arranged on the base plate, and the top seat is detachably arranged on the top seat. The two ends of the base and the two ends of the top seat are connected through I-shaped profiles, two rows of centrosymmetric special-shaped angle profiles are arranged between the two I-shaped profiles, each special-shaped angle profile comprises an angle profile and a turbulent flow toothed plate on a flange plate of the angle profile, and the connecting line of the ends of the two flanges of the angle profile is parallel to the transverse center line of the base and is close to the transverse center line of the base. The distance between the adjacent angular profiles in the same row is smaller than the length of the connecting line of the ends of the two flanges of the angular profiles. The multi-tooth flow channel is formed by the angular profile and the turbulent flow toothed plate, multiple hindrance is made 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 runner type explosion suppression isolation protection retaining wall based on an angular profile. 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, a reinforced concrete protection structure is mostly used in the production site 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 has to be removed, and then a new reinforced concrete protection structure has to 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 is difficult to directly remove and has a large removal difficulty. SUMMARY

[0004] In order to solve the above problems, the present application provides a multi-tooth runner type explosion suppression isolation protection retaining wall based on an angular profile.

[0005] The above technical purpose of the present application is achieved by the following technical scheme: a multi-tooth runner type explosion suppression isolation protection retaining wall based on an angular profile, 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 seat arranged in an upper and lower interval, the base is detachably arranged on the base plate, the base and the top seat are connected at both ends by two vertically arranged I-shaped profiles, two rows of vertically arranged special-shaped angular profiles are arranged between the two I-shaped profiles and are centrally symmetric with the center point of the base, the special-shaped angular profile comprises an angular profile and a plurality of spoiler tooth plates arranged on one of the flange plates of the angular profile, the length direction of the spoiler tooth plate is consistent with the length direction of the angular profile, and the plate surface is perpendicular to the flange plate, the connecting line of the two flange end portions of the angular profile is parallel to and adjacent to the horizontal center line of the base, and the distance between the two adjacent angular profiles in the same row is less than the length of the connecting line of the two flange end portions of the angular profile.

[0006] Further, the spoiler tooth plate is provided with two, symmetrically arranged on both sides of one of the flange plates of the angle profile, and the distance from the spoiler tooth plate to the corner of the angle profile is less than the distance from the spoiler tooth plate to the corresponding flange end of the angle profile.

[0007] Further, the spoiler tooth plate is provided with two, one of which is arranged on the inner side of the flange plate of the angle profile and adjacent to the corner of the angle profile, and the other is arranged at the end of the corresponding flange plate of the angle profile.

[0008] Further, the protective grid comprises a mother grid assembly and a sub-grid assembly, the mother grid assembly comprises first supporting plates and first lap plates arranged in parallel and spaced apart, both ends of the first supporting plates and the first lap plates are connected by two I-shaped steel, and a row of special-shaped angle profiles is arranged between the first supporting plates and the first lap plates; the sub-grid assembly comprises second supporting plates and second lap plates arranged in parallel and spaced apart, and a row of special-shaped angle profiles is arranged between the second supporting plates and the second lap plates; the I-shaped steel is provided with a first notch near one end of the first lap plate, the first lap plate is arranged in the first notch, and the outer plate surface of the first lap plate is flush with the end surface of the I-shaped steel; the I-shaped steel is provided with a second notch near one end of the first supporting plate to accommodate the second lap plate, and the second lap plate is arranged in the second notch and connected with the first supporting plate to form a base, and the first lap plate and the second supporting plate are connected to form a top.

[0009] Further, two rows of first through holes are symmetrically arranged on the first supporting plate, one row of second through holes is arranged on the second lap plate and has the same core as the corresponding side first through hole, and two rows of first screws are arranged on the base plate corresponding to the first through hole; a row of third through holes is arranged on the first lap plate, and a row of fourth through holes is arranged on the second supporting plate corresponding to the third through hole.

[0010] Further, two fifth through holes are arranged at both ends of the first supporting plate, a sixth through hole is arranged on the second lap plate corresponding to the fifth through hole, and a second screw is arranged on the base plate corresponding to the fifth through hole; a seventh through hole is arranged at both ends of the first lap plate, and an eighth through hole is arranged at both ends of the second supporting plate corresponding to the seventh through hole.

[0011] Further, the concrete base comprises a concrete bottom plate, the concrete bottom plate is provided with a mounting base, the mounting groove is arranged in the mounting base, and the anchor bar is welded to the bottom of the base plate and embedded in the mounting base.

[0012] Further, a cover plate is detachably arranged in the mounting groove, the cover plate is in the form of a box with an open bottom and a size consistent with the size of the groove cavity of the mounting groove, a plurality of reinforcing rib plates are arranged in the box cavity in a crisscross manner, and two lifting holes are arranged at both ends of the top surface of the cover plate.

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

[0014] 1、In the present application, the concrete base and the protective grid are arranged, the concrete base is pre-buried into the foundation pit corresponding to the position where the protective retaining wall needs to be installed, the stability of the base is ensured, thereby providing a solid bottom foundation for the protective grid and ensuring the stability of the protective grid under the impact of explosion; the protective grid is detachably arranged in the base plate of the concrete base through the base, so that the entire protective grid can be detached, thereby avoiding the influence of the existing protective retaining wall structure during on-site reconstruction, and greatly reducing the construction difficulty, construction cost and construction period of on-site reconstruction.

[0015] 2、In the present application, the overall frame of the protective grid is formed by the base, the top seat and the I-shaped profiles at both ends, and the protective wall body is formed by the two rows of center-symmetrical special-shaped angle profiles in an interactive structure, which can be used to resist explosion fragments generated by explosion, attenuate the explosion shock wave overpressure value and the explosion fireball thermal radiation value. The relatively complex multi-tooth flow channel is formed by the angle profiles and a plurality of spoiler plates in the special-shaped angle profiles, multiple obstacles are created on the propagation path of the explosion shock wave, the instability of the high-pressure gas molecular fluid is gradually induced in mechanics, the explosion shock wave is converted from the original Mach number dominated approximate non-viscous fluid to the Reynolds number dominated viscous fluid, a large amount of disordered turbulent flow is gradually formed in the flow channel during the propagation process. Finally, the internal energy is converted into heat energy and kinetic energy on the microscale through viscous dissipation, realizing rapid and efficient dissipation of the total energy of the explosion shock wave, thereby attenuating the explosion shock wave overpressure value and the explosion fireball thermal radiation value.

[0016] 3、In the present application, the mother grid assembly and the sub-grid assembly are arranged, the protective grid is formed by splicing the mother grid assembly and the sub-grid assembly, so that the weight of a single grid assembly can be reduced, the production and transportation are facilitated, during installation, the sub-grid assembly is only needed to be reversely inserted into the mother grid assembly, and then the splicing can be completed by screwing, which is also convenient for later disassembly and replacement. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0018] Figure 2 is a schematic diagram of the structure of the protective grid of the embodiment 1 of the present application;

[0019] Figure 3 is a schematic diagram of the structure of the concrete base of the embodiment 1 of the present application;

[0020] Figure 4 is a schematic diagram of the structure of the concrete base after the cover plate is covered on the cover plate of the embodiment 1 of the present application;

[0021] Figure 5 is a schematic diagram of the structure of the cover plate of the embodiment 1 of the present application;

[0022] Figure 6 This is a cross-sectional schematic diagram of the protective grille in Embodiment 2 of the present invention;

[0023] Figure 7 This is a schematic diagram showing the angle at which the protective barrier can block the scattering of fragments in Embodiment 2 of the present invention;

[0024] Figure 8 This is a cross-sectional schematic diagram of the protective grille in Embodiment 3 of the present invention;

[0025] Figure 9 This is a schematic diagram of the angle at which the protective barrier can block the scattering of fragments in Embodiment 3 of the present invention;

[0026] Figure 10 This is an exploded structural diagram of the protective grille in Embodiment 4 of the present invention;

[0027] Figure 11 This is a side view of the mother grid assembly in Embodiment 4 of the present invention.

[0028] In the diagram: 10. Concrete base; 11. Mounting groove; 12. Base plate; 13. First screw; 14. Second screw; 15. Concrete base plate; 16. Mounting base; 20. Protective grille; 21. Base; 22. Top seat; 23. I-beam profile; 231. First notch; 232. Second notch; 24. Irregular angle profile; 241. Angle profile; 242. Baffle tooth plate; 25. Mother grille assembly; 2 51. First support plate; 252. First overlapping plate; 253. First through hole; 254. Third through hole; 255. Fifth through hole; 256. Seventh through hole; 26. Sub-grid assembly; 261. Second support plate; 262. Second overlapping plate; 263. Second through hole; 264. Fourth through hole; 265. Sixth through hole; 266. Eighth through hole; 30. Cover plate; 31. Reinforcing rib plate; 32. Lifting hole. 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] Example 1

[0031] like Figures 1-5 As shown in the figure, this application discloses a multi-tooth flow channel explosion suppression isolation and protective barrier based on angular profiles, including a pre-embedded concrete base 10, a protective grid 20 and a cover plate 30.

[0032] Specifically, the concrete base 10 is a pre-buried reinforced concrete structure, which can be directly poured on the construction site, or can be a factory prefabricated component, and then pre-buried in the foundation pit corresponding to the position where the protective barrier wall needs to be installed, to ensure the stability of the base, thereby providing a solid bottom foundation for the protective grid 20, and ensuring the stability of the protective grid 20 under explosion impact. The concrete base 10 is divided into two layers as a whole, including a concrete bottom plate 15 arranged at the bottom, and a mounting base 16 arranged on the concrete bottom plate 15. The concrete bottom plate 15 and the mounting base 16 are both poured with ordinary C30 plain concrete, HPB235 steel bars with a diameter of 8 mm, and HRB335 steel bars with a diameter of 20 mm. During construction, the top surface of the mounting base 16 is flush with the factory ground level, and the area on the concrete bottom plate 15 outside the mounting base 16 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 layout of the factory.

[0033] An installation slot 11 is arranged in the mounting base 16, which can be directly reserved during the pouring construction of the mounting base 16 to avoid wasting manpower in later excavation. The bottom of the installation slot 11 is provided with a base plate 12, which is a 10 mm thick steel plate used to connect the protective grid 20. During the concrete pouring construction of the mounting base 16, anchor bars are welded at the bottom of the base plate 12 and pre-buried in the mounting base 16. The anchor bars can be HRB335 hook-shaped steel bars with a diameter of 18 mm. The anchor bars make the base plate 12 lap with the steel bars in the reinforced concrete foundation, thereby firmly fixing the base plate 12 in the installation slot 11 of the mounting base 16 and ensuring the stability of the bottom of the protective grid 20 after installation.

[0034] A cover plate 30 is detachably arranged in the installation slot 11. After the cover plate 30 is installed in the installation slot 11, the upper surface of the cover plate 30 is flush with the upper surface of the installation slot 11 and the ground surface. When the process of the factory is adjusted so that the protective barrier wall does not need to be deployed at the original position, only the protective grid 20 needs to be removed, and then the cover plate 30 is covered in the installation slot 11, which can ensure that the base part is flush with the ground. When the protective barrier wall needs to be redeployed, only the cover plate 30 needs to be opened, and then the protective grid 20 can be installed. The cover plate 30 is a box-shaped structure with an open bottom and a size consistent with the size of the slot cavity of the installation slot 11. A plurality of reinforcing rib plates 31 are arranged in the box-shaped cavity in a longitudinal and transverse manner, which can be integrally injection molded with high-strength static conductive rubber material to ensure that the cover plate 30 has sufficient strength. In order to facilitate the installation and hoisting of the cover plate 30, two lifting holes 32 are arranged at both ends of the cover plate 30. The lifting holes 32 are counter-sunk bolt holes, which can be plugged by counter-sunk bolts after the cover plate 30 is covered in the installation slot 11, so as to prevent dangerous materials or impurities from entering.

[0035] The protective grid 20 comprises a base 21 and a top 22, which are arranged in a vertical direction, and the base 21 is detachably arranged on the base plate 12, so that the whole protective grid 20 can be detached, which can not be affected by the existing protective wall structure during the on-site modification, and greatly reduces the construction difficulty, construction cost and construction period of the on-site modification.

[0036] The two ends of the base 21 and the top 22 are connected by two vertically arranged I-shaped profiles 23, the length direction of the I-shaped profile 23 is perpendicular to the plate surface of the base plate 12, and the two side flange plates of the two I-shaped profiles 23 are parallel, and the upper and lower ends of the I-shaped profile 23 are welded and fixed with the base 21 and the top 22, so that the two I-shaped profiles 23 and the base 21 and the top 22 form the overall frame structure of the protective grid 20. The I-shaped profile 23 is a steel profile, an aluminum alloy profile or a profile made of other materials with sufficient strength, such as I-shaped steel, I-shaped aluminum, etc.

[0037] Two rows of special-shaped angle profiles 24 are arranged between the two I-shaped profiles 23, which are vertically arranged and centrally symmetric with the center point of the base 21, and the upper and lower ends of the special-shaped angle profile 24 are welded and fixed with the base 21 and the top 22. The special-shaped angle profile 24 comprises an angle profile 241 and a plurality of spoiler tooth plates 242 arranged on one of the flange plates of the angle profile 241, the length direction of the spoiler tooth plate 242 is consistent with the length direction of the angle profile 241, and the plate surface is perpendicular to the flange plate. The angle profile 241 is a steel profile, an aluminum alloy profile or a profile made of other materials with sufficient strength, such as angle steel, angle aluminum, etc., and is preferably a ∟63×6 type hot-rolled ordinary equilateral angle steel of Q235 grade. The spoiler tooth plate 242 is a steel or aluminum plate structure, and its length is consistent with the length of the I-shaped profile 23.

[0038] The two flange end lines of the angle profile 241 are parallel to and adjacent to the horizontal center line of the base 21, and the distance between the two adjacent angle profiles 241 in the same row is less than the length of the two flange end lines of the angle profile 241. In this way, the two rows of angle profiles 241 form a protective surface without gaps in the vertical plane, which can be used to resist explosion fragments generated by explosion, and attenuate explosion shock wave and explosion fireball; in the horizontal plane, the two rows of angle profiles 241 and the plurality of spoiler tooth plates 242 form a more complex multi-tooth flow channel, thereby creating multiple obstacles in the propagation path of the explosion shock wave.

[0039] When the explosion shock wave passes through the corner or the missing corner of the flow channel, a large amount of energy will be converted due to the sparsity effect and instability effect, i.e. converted into heat energy and kinetic energy, thereby achieving the attenuation of the explosion shock wave in energy. The above-mentioned multi-tooth flow channel of the present application forms more than one corner or missing corner, which can achieve a large attenuation of the shock wave energy.

[0040] The attenuation principle of shock wave energy within the multi-tooth flow channel of this application can be roughly manifested in five phenomena:

[0041] 1) Reflection mechanism: When a shock wave strikes the rigid wall of the angled profile 241 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.

[0042] 2) Chase 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 chasing 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.

[0043] 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.

[0044] 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.

[0045] 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 must pass through the rarefaction wave (sparse region). After the reflected shock wave wavefront intrudes into the low-pressure, low-density rarefaction region, the pressure and velocity of the reflected shock wave wavefront decrease. In other words, the rarefaction wave "dilutes" and "disperses" the energy of the reflected wave, resulting in energy dissipation.

[0046] 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.

[0047] Example 2

[0048] like Figures 6-7 As shown in the figure, this application discloses a multi-toothed flow channel explosion suppression isolation and protection barrier based on angular profiles. Its overall structure is the same as that of embodiment 1, except that the only difference is the arrangement of the interference flow tooth plate 242.

[0049] Two spoiler teeth 242 are provided, symmetrically arranged on both sides of one of the flanges of the angular profile 241, and the distance from the spoiler teeth 242 to the corner of the angular profile 241 is less than the distance from the spoiler teeth 242 to the end of the corresponding flange of the angular profile 241.

[0050] Specifically, a ∟20×3 equilateral angle steel structure can be used, symmetrically arranged on both sides of one flange of the angle profile 241, i.e., one equilateral angle steel is arranged on each side. The equilateral angle steel is ordinary hot-rolled Q235 grade steel. During arrangement, one flange of the two equilateral angle steels is attached to the flange of the angle profile 241, and the end of the flange is arranged near the corner of the angle profile 241. The equilateral angle steel and the flange of the angle profile 241 are connected by bolts or by through-hole plug welding. The other flange of the equilateral angle steel is perpendicular to the corresponding flange of the angle profile 241 to form a spoiler tooth plate 242.

[0051] When bolted connections are used, through holes of M6 bolt size are pre-drilled on the corresponding flange plates of the angle profile 241 and the equilateral angle steel. Then, the two equilateral angle steels are symmetrically arranged on both sides of the corresponding flange plates of the angle profile 241, and the two equilateral angle steels are fixed to the flange plates of the angle profile 241 by passing M6 bolts through the through holes.

[0052] When using the through-hole plug welding process for welding connection, plug welding through holes are pre-drilled on the corresponding flange plates of the angle profile 241 and the equilateral angle steel. Then, the two equilateral angle steels are symmetrically arranged on both sides of the corresponding flange plates of the angle profile 241. An M6 stud with a length greater than the thickness of the flange plate of the angle profile 241 is placed in the plug welding through hole. The two ends of the stud are welded to the flange of the equilateral angle steel using an electric welding machine, and the welding surface is flush with the flange surface.

[0053] Two spoiler tooth plates 242 are formed by two equal angle steels, four spoiler teeth are formed in the multi-tooth flow channel, the peak shock wave attenuation efficiency of the explosion shock wave in the multi-tooth flow channel reaches 81%, and the shock wave energy is greatly attenuated. At the same time, the number of anti-penetration metal layers and air layers is increased, the metal layer is 4 layers, the air layer is 1 layer, and the ability of the metal flow channel structure to resist penetration of fragments is improved.

[0054] The protective barrier of the embodiment is arranged at a distance of 1 m from the explosion origin, and can capture and resist explosion fragments flying at a scattering angle of 0° to 25°. As shown in Figure 7 , the optimal protection angle of the protective barrier of the embodiment is 19°, the minimum metal protection layer thickness can reach 12 mm, the maximum metal protection layer thickness can reach 25 mm, and the maximum penetration speed of explosion fragments of a typical 3 cm x 3 cm x 5 cm steel equipment can be prevented at 834 m / s, and the maximum penetration kinetic energy can be resisted at 112.07 kJ, so that the anti-penetration protection demand of the general dangerous combustion and explosion product production process accidental explosion fragments can be met by resisting all flying fragments and attenuating explosion shock wave and heat radiation, and the anti-rampage effect can be realized.

[0055] Embodiment 3

[0056] As shown in Figures 8-9 , the application discloses a multi-tooth flow channel type explosion suppression isolation protective barrier based on an angle-shaped profile, which has the same overall structure as that of embodiment 1, and the difference lies only in the arrangement of the plurality of spoiler tooth plates 242.

[0057] The spoiler tooth plate 242 is provided with two, one of which is arranged on the inner side of the flange plate of the angle-shaped profile 241 and near the corner of the angle-shaped profile 241, and the other is arranged at the end of the corresponding flange plate of the angle-shaped profile 241.

[0058] Specifically, two 25x25x3 T-shaped steel structures can be used, and the T-shaped steel adopts ordinary hot-rolled Q235 grade steel. One of the T-shaped steels is arranged on the inner side of the flange plate of the angle-shaped profile 241, the flange plate of the T-shaped steel is attached to the inner side of the flange plate of the angle-shaped profile 241, and the end of the flange plate of the T-shaped steel is aligned with the inner folding corner of the flange plate of the angle-shaped profile 241. A row of M6 bolt size through holes are formed on the flange plate on both sides of the web of the T-shaped steel in advance, two rows of M6 bolt size through holes are formed on the corresponding position of the flange plate of the angle-shaped profile 241, and then M6 bolts are used to pass through the through holes to fix the T-shaped steel and the angle-shaped profile 241 or use the perforation plug welding process to weld and connect. After fixing, the web of the T-shaped steel is perpendicular to the corresponding flange plate of the angle-shaped profile 241 to form a spoiler tooth plate 242.

[0059] Another T-shaped steel is arranged at the end of the corresponding flange plate of the angle profile 241. The web of the T-shaped steel is attached to the outside of the corresponding flange plate of the angle profile 241, and the inside of the flange plate of the T-shaped steel is aligned with the end of the corresponding flange plate of the angle profile 241. A row of through holes of M6 bolt size are pre-drilled on the web of the T-shaped steel, and a row of through holes of M6 bolt size are pre-drilled on the corresponding position of the flange plate of the angle profile 241, and then the T-shaped steel is fixed with the angle profile 241 by using M6 bolts to pass through the through holes or is connected by using the perforation plug welding process. After being fixed, the flange plate of the T-shaped steel is perpendicular to the corresponding flange plate of the angle profile 241 to form a spoiler plate 242.

[0060] Two spoiler plates 242 are formed by two T-shaped steels, and six spoiler teeth are formed in the multi-tooth flow channel, so that the peak value decay efficiency of the blast shock wave in the multi-tooth flow channel reaches 87%, and the shock wave energy is greatly attenuated.

[0061] The protective barrier of the present embodiment is arranged at a distance of 1 m from the explosion origin, and can capture and resist the explosion fragments flying at a scattering angle of 0° to 25°. As shown in Figure 9 The optimal protection angle of the protective barrier of the present embodiment is 11.6°, the minimum metal protection layer thickness can reach 12 mm, and the maximum metal protection layer thickness can reach 20 mm. The maximum penetration speed of the explosion fragments of a typical 3 cm x 3 cm x 5 cm steel equipment that can be protected is 680 m / s, and the maximum penetration kinetic energy that can be resisted is 81.15 kJ, so that the anti-rampage effect can be realized by resisting all the flying fragments and attenuating the blast shock wave and thermal radiation, and the anti-penetration protection requirement of the explosion fragments of the general dangerous combustion and explosion product production process can be met.

[0062] Embodiment 4

[0063] As shown in Figures 10-11 The present application discloses a multi-tooth flow channel type explosion suppression isolation protective barrier based on an angle profile, which has the same overall structure as that of embodiment 1, and the only difference is the specific structure of the protective grid 20.

[0064] The protective grid 20 comprises a mother grid assembly 25 and a child grid assembly 26. The mother grid assembly 25 comprises a first supporting plate 251, a first lap plate 252, two I-shaped sections 23 and a row of special-shaped angle sections 24. The first supporting plate 251 and the first lap plate 252 are arranged in parallel and at intervals. The first supporting plate 251 is selected from a 10mm-thick wide strip steel plate. The first lap plate 252 is selected from a 10mm-thick narrow strip steel plate. The width of the first lap plate 252 is half of the width of the first supporting plate 251 and is arranged on one side of the first supporting plate 251 correspondingly. The two ends of the first supporting plate 251 and the first lap plate 252 are connected by the two I-shaped sections 23. The I-shaped sections 23 are selected from I14 type hot-rolled ordinary I-shaped steel with a Q235 brand. The length direction of the I-shaped sections 23 is perpendicular to the plate surface of the base plate 12, and the plate surfaces of the two side flanges of the two I-shaped sections 23 are parallel. The two I-shaped sections 23 serve as two end supports, and the upper and lower ends thereof are welded and fixed to the first supporting plate 251 and the first lap plate 252 respectively, so as to ensure the overall strength of the mother grid assembly 25. The special-shaped angle sections 24 are arranged between the first supporting plate 251 and the first lap plate 252 and in the region between the two I-shaped sections 23. The upper and lower ends of the special-shaped angle sections 24 are welded and fixed to the first supporting plate 251 and the first lap plate 252 respectively.

[0065] The child grid assembly 26 comprises a second supporting plate 261, a second lap plate 262 and a row of special-shaped angle sections 24. The second supporting plate 261 and the second lap plate 262 are arranged in parallel and at intervals. The second supporting plate 261 is selected from a 10mm-thick wide strip steel plate, and the size thereof is consistent with that of the first supporting plate 251. The second lap plate 262 is selected from a 10mm-thick narrow strip steel plate, and the size thereof is consistent with that of the first lap plate 252. The special-shaped angle sections 24 are arranged between the second supporting plate 261 and the second lap plate 262 and are welded and fixed to the first supporting plate 251 and the first lap plate 252 at the upper and lower ends thereof respectively.

[0066] A first notch 231 is formed at one end of the I-shaped section 23 close to the first lap plate 252. The first lap plate 252 is arranged in the first notch 231, and the outer plate surface of the first lap plate 252 is flush with the end surface of the I-shaped section 23. A second notch 232 is formed at one end of the I-shaped section 23 close to the first supporting plate 251, and the second notch 232 accommodates the second lap plate 262. Two rows of first through holes 253 are formed on the first supporting plate 251 in a central symmetry, and the center of symmetry is the center point of the first supporting plate 251. A row of second through holes 263 is formed on the second lap plate 262 and is coaxial with the corresponding side first through holes 253. Two rows of first screws 13 are arranged on the base plate 12 corresponding to the first through holes 253. A row of third through holes 254 is formed on the first lap plate 252, and a row of fourth through holes 264 is formed on the second supporting plate 261 corresponding to the third through holes 254.

[0067] When installing, the sub-grid assembly 26 is vertically rotated so that the second supporting plate 261 faces upward and the second lap plate 262 is horizontally inserted into the female grid assembly 25, so that the second lap plate 262 is placed in the second gap 232. Then, the sub-grid assembly 26 and the female grid assembly 25 are hoisted into the installation slot 11 using a liftable small gantry electric hoist or a small hoist, so that the first through hole 253 on the first supporting plate 251 is aligned with the first screw 13 on the base plate 12, and the second through hole 263 on the second lap plate 262 is aligned with the first screw 13 on the corresponding side of the base plate 12, and then the second lap plate 262 is placed in contact with the first supporting plate 251, the first supporting plate 251 is placed in contact with the base plate 12, and then the second lap plate 262, the first supporting plate 251 and the base plate 12 are fastened and connected by screwing nuts on the ends of the first screw 13. After the second lap plate 262 is connected with the first supporting plate 251, the base 21 is formed. At this time, the first lap plate 252 is in contact with the second supporting plate 261, and the third through hole 254 is aligned with the fourth through hole 264. The first lap plate 252 and the second supporting plate 261 are connected by using M24 bolt connection to form the top 22. In this way, the female grid assembly 25 and the sub-grid assembly 26 can be spliced to form the protective grid 20 and can be detachably fixed on the base plate 12. The protective grid 20 is spliced by two groups of grid assemblies, so that the weight of each group of grid assemblies can be controlled within 200 kg, and 3 people can realize the carrying of the grid assemblies, and the splicing operation of the two groups of grid assemblies can be realized within 20 minutes, which greatly shortens the construction time and reduces the construction difficulty and complexity. In the later stage, only the bolts need to be unscrewed to disassemble, replace and assemble.

[0068] To further ensure the firmness of the connection between the protective grid 20 and the base plate 12, two fifth through holes 255 are arranged at intervals at the two ends of the first supporting plate 251, and a sixth through hole 265 is arranged on the second lap plate 262 corresponding to the fifth through hole 255, and a second screw 14 is arranged on the base plate 12 corresponding to the fifth through hole 255. Then, the fifth through hole 255 and the sixth through hole 265 are respectively sleeved on the corresponding second screw 14, and then the nuts are tightened, so as to ensure the connection between the two ends of the protective grid 20 and the base plate 12, and further strengthen the connection stability. The seventh through hole 256 is arranged at the two ends of the first lap plate 252, and the eighth through hole 266 is arranged at the two ends of the second supporting plate 261 corresponding to the seventh through hole 256. After the eighth through hole 266 is aligned with the corresponding seventh through hole 256, the M24 bolt connection is used to ensure the fastening of the top two ends of the female grid assembly 25 and the sub-grid assembly 26. The first screw 13 and the second screw 14 are both M24 ordinary high-strength screws, which ensure the connection strength.

[0069] The above merely describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-described embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A multi-toothed runner type explosion suppression isolation shield wall based on angle section, characterized in that: The utility model relates to a pre-embedded concrete base (10) and a protective grid (20), the concrete base (10) is provided with a mounting groove (11) in it, the mounting groove (11) is provided with a base plate (12) on the groove bottom, the protective grid (20) includes bottom seat (21) and top seat (22) arranged in upper and lower intervals, the bottom seat (21) is detachably arranged on the base plate (12), the bottom seat (21) and top seat (22) are connected through two vertically arranged I-shaped sections (23) at both ends, two I-shaped sections (23) are provided with two rows of vertically arranged and center-symmetrical special-shaped angle sections (24) with the center point of bottom seat (21), the special-shaped angle section (24) includes angle section (241) and a plurality of spoiler toothed plates (242) arranged on one of the flange plates of angle section (241), the length direction of spoiler toothed plate (242) is consistent with the length direction of angle section (241), and the plate surface is perpendicular to the flange plate, the connecting line of the two flange end portions of angle section (241) is parallel to and arranged adjacent to the transverse center line of bottom seat (21), and the distance between adjacent two angle sections (241) in the same row is less than the length of the connecting line of the two flange end portions of angle section (241).

2. A multi-toothed runner type explosion suppression isolation shield wall based on angle section according to claim 1, characterized in that: The spoiler toothed plate (242) is provided with two, symmetrically arranged on both sides of one of the flange plates of angle section (241), and the distance from spoiler toothed plate (242) to the corner of angle section (241) is less than the distance from spoiler toothed plate (242) to the corresponding flange end portion of angle section (241).

3. The multi-toothed runner type explosion suppression isolation and protection bulkhead based on angle-shaped section bar according to claim 1, characterized in that: The spoiler toothed plate (242) is provided with two, one of which is arranged on the inner side of the flange plate of angle section (241) and adjacent to the corner of angle section (241), and the other is arranged at the end of the corresponding flange plate of angle section (241).

4. A multi-toothed runner blast containment barrier based on angle section according to any one of claims 1 to 3, characterized in that: The protective grid (20) comprises a mother grid assembly (25) and a sub-grid assembly (26), the mother grid assembly (25) comprises first supporting plates (251) and first lap plates (252) arranged in parallel and at intervals, both ends of the first supporting plates (251) and the first lap plates (252) are connected by two I-shaped sections (23), and a row of special-shaped angle sections (24) is arranged between the first supporting plates (251) and the first lap plates (252); the sub-grid assembly (26) comprises second supporting plates (261) and second lap plates (262) arranged in parallel and at intervals, and a row of special-shaped angle sections (24) is arranged between the second supporting plates (261) and the second lap plates (262); the I-shaped section (23) is provided with a first notch (231) near one end of the first lap plate (252), the first lap plate (252) is arranged in the first notch (231), and the outer plate surface of the first lap plate (252) is flush with the end surface of the I-shaped section (23); the I-shaped section (23) is provided with a second notch (232) for accommodating the second lap plate (262) near one end of the first supporting plate (251), and the second lap plate (262) is arranged in the second notch (232) and connected with the first supporting plate (251) to form a base (21), and the first lap plate (252) is connected with the second supporting plate (261) to form a top seat (22).

5. A multi-toothed runner type explosion suppression and isolation containment wall based on angle section according to claim 4, characterized in that: A plurality of first through holes (253) are symmetrically arranged on the first supporting plate (251), a plurality of second through holes (263) are arranged on the second lap plate (262) and correspond to the first through holes (253), and a plurality of first screws (13) are arranged on the base plate (12) and correspond to the first through holes (253).

6. A multi-toothed runner type explosion suppression and isolation containment wall based on angle section according to claim 5, characterized in that: A plurality of fifth through holes (255) are arranged at intervals on both ends of the first supporting plate (251), a plurality of sixth through holes (265) are arranged on the second lap plate (262) and correspond to the fifth through holes (255), and a plurality of second screws (14) are arranged on the base plate (12) and correspond to the fifth through holes (255).

7. A multi-toothed runner blast containment barrier based on angle section according to any one of claims 1 to 3, characterized in that: The concrete base (10) comprises a concrete bottom plate (15), the concrete bottom plate (15) is provided with a mounting base (16), the mounting groove (11) is arranged in the mounting base (16), and the base plate (12) is welded with an anchor bar embedded in the mounting base (16).

8. A multi-toothed runner type explosion suppression and isolation containment wall based on angle section according to claim 7, characterized in that: A cover plate (30) is detachably arranged in the mounting groove (11), the cover plate (30) is in a box-shaped structure with an open bottom and a size consistent with the size of the groove cavity of the mounting groove (11), a plurality of reinforcing rib plates (31) are arranged in the box-shaped cavity in a crisscross manner, and two lifting holes (32) are arranged at both ends of the top surface of the cover plate (30).

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