Municipal road anti-explosion damping protection system close to hydrogen storage tank and construction method of municipal road anti-explosion damping protection system

Abstract

The invention discloses a municipal road anti-explosion damping protection system close to a hydrogen storage tank and a construction method of the municipal road anti-explosion damping protection system. The protection system is arranged in a reasonable protection range between a hydrogen storage tank and a municipal road to be protected in parallel, the axes of the hydrogen storage tank, the municipal road and the protection system are kept parallel, and the protection system comprises a horizontal cylinder protection device, a reinforced soil sand cushion foundation and a grating type interception plate; according to the horizontal cylinder protection device, explosive shock waves are converted into rotating kinetic energy around a center rotating shaft and radial and axial vibration energy, energy dissipation is achieved through friction between an elastic damper and a sand cushion layer, and large-size explosive fragments are intercepted in advance through a grating type interception net. The construction method comprises the steps of site positioning, foundation construction, arrangement of the support and the rotating shaft, hoisting and assembling of the device cylinder, and installation, debugging and acceptance of the intercepting plate. The device achieves the dual functions of explosive shock wave digestion and fragment interception, is short in construction period, meets the requirement for rapid protection of the periphery of the hydrogen storage tank, and has the advantages of being simple in structure and good in protection effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen storage facility safety protection, and particularly relates to an explosion-proof shock-absorbing protection system and a construction method thereof, which is arranged in a reasonable protection range between a hydrogen storage tank and a municipal road to be protected and protects the municipal road near the hydrogen storage tank. BACKGROUND

[0002] As clean energy, the safety protection of the hydrogen storage tank, a hydrogen storage equipment, is very important. When the hydrogen storage tank explodes, a high-intensity shock wave and high-speed flying debris are generated, which seriously threatens pedestrians and vehicles on the surrounding municipal road. The existing protection devices are mostly fixed explosion-proof walls or plate shock-absorbing structures, which have obvious defects: the fixed explosion-proof wall can only passively intercept debris and cannot eliminate the explosion impact force, and is easy to be damaged by the shock wave; the plate shock-absorbing structure has low energy consumption efficiency and needs a complex support system. At the same time, the foundation of the traditional protection device is mostly a concrete structure, which has a long construction period and high cost and is difficult to adapt to the rapid protection requirements of the surrounding site of the hydrogen storage tank.

[0003] Therefore, it is an urgent need in the field of safety protection of the hydrogen storage tank to develop a protection device that relies on its rolling and vibration to realize impact energy consumption and has a debris interception function and a simplified structure. SUMMARY

[0004] In view of the deficiencies and defects of the prior art, the present application provides an explosion-proof shock-absorbing protection system for a municipal road near a hydrogen storage tank and a construction method thereof, which is arranged in a reasonable range between the hydrogen storage tank and the municipal road to be protected and can protect the municipal road when the hydrogen tank explodes.

[0005] In order to achieve the above technical purpose, the present application provides an explosion-proof shock-absorbing protection system for a municipal road near a hydrogen storage tank, which is arranged in parallel between the hydrogen storage tank and a one-side municipal road, and comprises a horizontal cylinder protection device, a reinforced soil sand cushion foundation and a grid baffle.

[0006] The horizontal cylinder protection device comprises a horizontal cylinder main body and fixed hinge supports symmetrically arranged at both ends of the horizontal cylinder main body, a rotating shaft is arranged at the center of the horizontal cylinder main body, the rotating shaft horizontally penetrates the horizontal cylinder main body, and both ends of the rotating shaft are rotationally connected with the fixed hinge supports on the corresponding side, an elastic damping block is arranged at the connecting part of the rotating shaft and the fixed hinge support, and a reinforcing assembly is welded on the blast-facing surface of the horizontal cylinder main body; the rotating shaft of the horizontal cylinder main body is parallel to the municipal road.

[0007] The reinforced sand cushion foundation is located below the horizontal cylindrical protective device, and includes a bottom reinforced sand cushion layer and an upper sand surface layer. The reinforced sand cushion layer is a fill layer formed by alternating layers of gravel and geogrid, with reinforced soil retaining walls on both sides of the fill layer. The geogrid layer is laid horizontally and anchored to the reinforced soil retaining walls on both sides. An arc-shaped groove matching the horizontal cylindrical body is formed above the reinforced sand cushion layer, and a sand surface layer is laid in the arc-shaped groove. The curvature of the sand surface layer matches the bottom of the horizontal cylindrical body. Two sets of fixed hinge supports are anchored at the bottom of the reinforced sand cushion foundation, and the lower outer surface of the horizontal cylindrical body is in contact with the sand surface layer.

[0008] Two grid-type baffles are provided, one on the side of the horizontal cylindrical protective device near the hydrogen storage tank and the other on the side near the municipal road. The grid baffles are installed close to the main body of the horizontal cylindrical device and fixed at the bottom on a reinforced soil and sand cushion foundation. The distance between the two grid baffles and the main body of the horizontal cylindrical device is 150-250mm, and the height of the grid baffles is 1.5-2.5m.

[0009] The preferred technical solution of the present invention is as follows: the geogrid layer adopts HDPE geogrid with a tensile strength ≥50kN / m; the gravel filling layer adopts gravel sand with a particle size ≤50mm and a compaction coefficient ≥0.95; the sand surface layer adopts medium-coarse sand with a particle size of 0.25~2mm.

[0010] The preferred technical solution of the present invention is as follows: the elastic damping retaining ring includes two sets of rubber buffer washers and a spring connected between the two sets of rubber buffer washers. The elastic damping retaining ring is sleeved on the part of the rotating shaft located between the cylindrical body and the fixed hinge support. One of the two sets of rubber buffer washers is fixed on the outer shell of the cylindrical body, and the other is connected to the fixed hinge support.

[0011] The preferred technical solution of the present invention is as follows: the reinforced sand cushion foundation further includes compacted backfill soil layers piled on both sides of the reinforced sand cushion layer and bagged soil layers stacked on top of the reinforced sand cushion layer and the compacted backfill soil layers.

[0012] The preferred technical solution of the present invention is as follows: the horizontal cylindrical body is made of Q345R steel; the reinforcing component includes multiple strip-shaped protrusions arranged along the length of the horizontal cylindrical body and parallel to each other, and the multiple strip-shaped protrusions are distributed in a ring at equal intervals on the outer wall of the horizontal cylindrical body.

[0013] The preferred technical solution of the present invention is as follows: the rotating shaft is a solid rotating shaft, and the two ends of the rotating shaft are respectively connected to the fixed hinge support through connecting bearings; the grid-type baffle on the side adjacent to the municipal road is higher than the overall height of the explosion-proof and shock-absorbing protective device.

[0014] This invention also provides a construction method for an explosion-proof and vibration-damping protection system for municipal roads near hydrogen storage tanks, the specific steps of which are as follows:

[0015] S1. Parallel positioning of the site and excavation of the foundation trench; Based on the volume of the hydrogen storage tank, the design explosion equivalent, and the location of the municipal road to be protected, determine the reasonable protection range of the device, use a total station to accurately locate the installation area, and ensure that the axes of the hydrogen storage tank, the explosion-proof and shock-absorbing protection system, and the municipal road are parallel; excavate the foundation trench according to the design trench size, the trench depth is the sum of the thickness of the reinforced soil and sand cushion layer and the height of the sand surface layer, after excavating to the plain soil layer, remove the humus and soft soil layers, level the bottom of the trench, and cover the cushion layer with a rainproof cloth during rainy weather to prevent water accumulation;

[0016] S2. Construction of reinforced soil-sand cushion foundation: The plain soil layer in the foundation trench is compacted in layers, each layer is 150-200mm thick, and the compaction coefficient is ≥0.93; gravel sand fill is laid in layers, each layer is loosely laid with a thickness of 200-250mm, and compacted with a light roller, with a compaction coefficient ≥0.95; multiple layers of HDPE geogrid are laid horizontally in the middle of the cushion layer, the geogrid is stretched taut without wrinkles, and fixed with U-shaped nails, with an end anchorage length ≥0.8m; after the geogrid is laid, the top surface of the cushion layer is arc-shaped to form an arc-shaped groove that matches the bottom of the horizontal cylindrical body. At the same time, graded reinforced soil retaining walls are constructed on both sides of the reinforced sand cushion layer. Backfill soil is compacted on the outside of the reinforced soil retaining walls, and bagged soil is piled in layers on the top of the reinforced sand cushion layer and the compacted backfill soil. Finally, a sand surface layer is laid in the arc-shaped groove to form the reinforced soil-sand cushion foundation.

[0017] S3. Installation of fixed hinge supports and layout of the central rotating shaft; Install fixed hinge supports at the preset positions of the reinforced soil and sand cushion foundation, and fit axial elastic damping retaining rings on both ends of the rotating shaft. Then, connect both ends of the rotating shaft to the two fixed hinge supports through connecting bearings. Adjust the level of the rotating shaft to ensure that the axial damping retaining rings and the rotating shaft can be reliably connected.

[0018] S4. Cylinder body hoisting and assembly; use a crane to hoist the cylinder body onto the arc-shaped sand surface, so that the rotating shaft can be inserted into the connecting component on the inner wall of the cylinder to ensure a stable connection between the rotating shaft and the cylinder; manually push the cylinder to test the smoothness of rotation and vibration;

[0019] S5. Installation of grid baffle: Steel columns are buried in the reinforced soil foundation at the front and rear of the cylindrical body; the grid baffle is fixed on the steel columns, ensuring that the height of the grid baffle is 1.5~2.5m and the distance between the grid baffle and the cylindrical body is 150~250mm;

[0020] S6. Commissioning and Acceptance: Using a simulated impact tool, an impact load is applied to the blast-facing surface of the cylindrical body. The rolling response and vibration attenuation effect of the test device are tested to ensure that the impact force can be effectively dissipated through rotation and damping, and that the vertical and radial vibration displacements are within the allowable range.

[0021] A further technical solution of the present invention: In step S1, the reasonable protection range of the device is determined based on the volume of the hydrogen storage tank, the designed explosion equivalent, and the location of the municipal road to be protected. The specific process is as follows:

[0022] S101. Calculate the peak overpressure of the explosion shock wave and the debris dispersion distance L based on the hydrogen storage tank volume and the explosion equivalent. f ;

[0023] First, calculate the mass of hydrogen: m = ρ·V;

[0024] Where ρ is the density of hydrogen gas; V is the volume of the hydrogen storage tank, in m³.

[0025] Calculate the explosive equivalent W using the TNT equivalent method. TNT Unit: kg

[0026] W TNT =ηm Q H / Q TNT

[0027] Where: m is the mass of hydrogen gas; η is the explosion efficiency, ranging from 0.05 to 0.15;

[0028] Q H Q is the heat of combustion of hydrogen. TNT TNT is becoming extremely popular;

[0029] By W TNT Calculate the maximum dispersion distance L of the debris f :

[0030] L f = 12 W TNT 1 / 3

[0031] S102. The distance L from the blast-facing side of the horizontal cylindrical protective device to the hydrogen storage tank ≤ the maximum fragmentation distance L. f The height and strength of the grid-type baffle meet the requirements for intercepting debris.

[0032] The preferred technical solution of the present invention is as follows: In step S3, the two ends of the elastic damping retaining ring are respectively connected to the end face of the adjacent fixed hinge support and the cylindrical body; in step S4, the cylindrical body is installed by connecting two half-cylinders; in step S6, the compaction degree of the reinforced soil and sand cushion layer, the tensile strength of the grid, and the reliability of the connection of each component are tested, and the construction is completed after all the standards are met.

[0033] The preferred technical solution of the present invention is as follows: the length of the horizontal cylindrical protective device, the reinforced soil and sand cushion foundation and the grid baffle covers the section of the hydrogen storage tank affected by the explosion, and each end extends by ≥1.0 m.

[0034] The working principle of this invention is as follows: When the hydrogen storage tank explodes, the large, high-speed flying debris is first blocked and falls off by the grid-type baffle; the remaining small debris and shock wave act on the explosion-facing surface of the horizontal cylindrical body, and the impact force is decomposed into two components: one is the tangential torque, which drives the cylinder to rotate around the central axis, and the rotational kinetic energy is gradually dissipated through the damping of the shaft bearing and the frictional resistance of the bottom of the cylinder and the arc-shaped sand surface; the other is the radial impact force, which causes the radial vibration of the cylinder. This vibration energy is gradually dissipated by the weight of the cylinder device and the frictional force on both sides, while the elastic-plastic deformation of the reinforced soil and sand cushion layer further buffers the vibration; the fixed support and the axial damping retaining ring together limit the range of motion of the cylinder, ensuring that the device completes energy dissipation and protection within a limited space, and finally achieves dual interception of shock wave and debris, protecting the safety of the parallel municipal road outside the device.

[0035] The beneficial effects of this invention are:

[0036] (1) High energy consumption efficiency: The present invention is equipped with a horizontal cylindrical protective device, which adopts a dual energy consumption mechanism of rotating the cylinder around the central axis and elastic damping buffering, converting the shock wave energy into rotational energy and vibration energy and then gradually dissipating it. Compared with the traditional plate structure, the impact energy dissipation efficiency is increased by more than 60%; the vibration displacement is strictly limited to ensure stable operation within the limited space.

[0037] (2) Functional integration: The present invention has grid-type baffles on both sides of the horizontal cylindrical protective device near the hydrogen storage tank and the municipal road, which have the two core functions of intercepting explosive debris and dissipating shock waves. The ring-shaped reinforcing ribs enhance the impact resistance performance, and no additional protective components are required.

[0038] (3) Strong layout adaptability: The protective device of the present invention is arranged in a reasonable protective range between the hydrogen storage tank and the parallel road on one side. The position of this range can be flexibly adjusted in combination with the volume of the hydrogen storage tank and the explosive equivalent, clearly dividing the base site area and the protective safety zone, avoiding the limitations of fixed distance, and adapting to different site conditions.

[0039] (4) Basic design innovation: This invention abandons the concrete foundation and adopts a reinforced soil and sand cushion layer design, which shortens the construction period by 50%; the geogrid and the slope protection work together to constrain the impact load and limit the movement range of the device, which is suitable for the rapid protection needs around the hydrogen storage tank. Attached Figure Description

[0040] Figure 1 This is a top view of the overall parallel arrangement of the protection system of the present invention;

[0041] Figure 2 This is a cross-sectional view of the overall protection system of the present invention;

[0042] Figure 3 This is a cross-sectional view of the horizontal cylindrical protective device of the present invention;

[0043] Figure 4 This is a schematic diagram of the external structure of the horizontal cylindrical protective device of the present invention;

[0044] Figure 5 This is a schematic diagram of the reinforced soil-sand cushion foundation structure of the present invention;

[0045] Figure 6 This is a partially enlarged schematic diagram of the axial elastic damping retaining ring of the present invention;

[0046] Figure 7 This is a schematic diagram illustrating the principle of rotational vibration energy dissipation in this invention.

[0047] In the diagram: 1-Horizontal cylindrical main body; 2-Rotating shaft; 3-Fixed hinge support; 4-Grid baffle; 5-Reinforced soil and sand cushion foundation; 501-Gravel fill layer; 502-Geogrid layer; 503-Reinforced soil retaining wall; 504-Bagged soil; 505-Sand surface layer; 506-Compacted backfill layer; 6-Hydrogen storage tank; 7-Municipal road; 8-Elastic damping retaining ring; 801-Rubber buffer gasket; 802-Spring; 9-Reinforcing component. Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 7 All accompanying drawings are simplified versions of embodiments and are intended only to clearly and concisely illustrate the embodiments of the present invention. The technical solutions shown in the drawings below are specific solutions of embodiments of the present invention and are not intended to limit the scope of the claimed invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] The embodiment provides an explosion-proof and vibration-damping protection system for municipal roads near hydrogen storage tanks, such as Figures 1 to 7As shown, the protection system is arranged in parallel between the hydrogen storage tank 6 and the municipal road 7 on one side. The protection system includes a horizontal cylindrical protective device, a reinforced soil and sand cushion foundation 5, and a grid-type baffle 4. The horizontal cylindrical protective device includes a horizontal cylindrical body 1 and fixed hinge supports 3 symmetrically arranged at both ends of the horizontal cylindrical body 1. A rotating shaft 2 is set at the center of the horizontal cylindrical body 1. The rotating shaft 2 horizontally penetrates the horizontal cylindrical body 1, and its two ends are rotatably connected to the fixed hinge supports 3 on the corresponding sides. The rotating shaft 2 is a solid rotating shaft. Both ends of the rotating shaft 2 are connected to the fixed hinge support 3 via connecting bearings; the rotating shaft 2 of the horizontal cylindrical body 1 is parallel to the municipal road 7; an elastic damping retaining ring 8 is provided at the connection between the rotating shaft 2 and the fixed hinge support 3, and a reinforcing component 9 is welded to the blast-facing surface of the horizontal cylindrical body 1; the horizontal cylindrical body 1 is made of Q345R steel; the reinforcing component 9 includes multiple parallel strip-shaped protrusions arranged along the length of the horizontal cylindrical body 1, and the multiple strip-shaped protrusions are distributed in a ring at equal intervals on the outer wall of the horizontal cylindrical body 1. The elastic damping retaining ring 8 includes two sets of rubber buffer washers 801 and a spring 802 connected between the two sets of rubber buffer washers 801. The elastic damping retaining ring 8 is sleeved on the part of the rotating shaft 2 located between the cylindrical body 1 and the fixed hinge support 3, and one of the two sets of rubber buffer washers 801 is fixed to the outer shell of the cylindrical body 1, and the other is connected to the fixed hinge support 3. The grid-type baffle 4 on one side of the adjacent municipal road 7 is higher than the overall height of the explosion-proof and shock-absorbing protective device.

[0051] In the embodiments, such as Figure 1 and Figure 5 As shown, the reinforced sand cushion foundation 5 is located below the horizontal cylindrical protective device, including a bottom reinforced sand cushion layer and an upper sand surface layer 505. The reinforced sand cushion layer is a fill layer formed by alternating layers of gravel fill 501 and geogrid layer 502, and reinforced soil retaining walls 503 are respectively provided on both sides of the fill layer. The geogrid layer is laid horizontally and anchored to the reinforced soil retaining walls 503 on both sides. An arc-shaped groove matching the horizontal cylindrical body 1 is formed above the reinforced sand cushion layer, and a geogrid is laid in the arc-shaped groove. The sand surface layer 505 has a curvature that matches the bottom of the horizontal cylindrical body 1; two sets of fixed hinge supports 3 are anchored at the bottom to the reinforced soil-sand cushion foundation 5, and the lower outer surface of the horizontal cylindrical body 1 is in contact with the sand surface layer 505; the geogrid layer 502 is made of HDPE geogrid with a tensile strength ≥50kN / m; the gravel fill layer 501 is filled with gravel sand with a particle size ≤50mm and a compaction coefficient ≥0.95; the sand surface layer 505 is made of medium-coarse sand with a particle size of 0.25~2mm. The reinforced soil-sand cushion foundation 5 also includes a compacted backfill layer 506 piled on both sides of the reinforced sand cushion layer and bagged soil 504 stacked in layers on top of the reinforced sand cushion layer and the compacted backfill layer 506.

[0052] In the embodiments, such as Figure 1 and Figure 2 As shown, there are two grid baffles 4, which are respectively arranged on the side of the horizontal cylindrical protective device near the hydrogen storage tank 6 and the side near the single-sided municipal road 7. The grid baffles 4 are arranged near the horizontal cylindrical body 1 and the bottom is fixed on the reinforced soil and sand cushion foundation 5. The distance between the two grid baffles 4 and the horizontal cylindrical body (1) is 150-250mm, and the height of the grid baffles (4) is 1.5-2.5m.

[0053] The construction method of a municipal road explosion-proof and vibration-damping protection system near a hydrogen storage tank, as described in this embodiment, includes the following specific steps:

[0054] S1. Site Parallel Positioning and Trench Excavation: Based on the volume of hydrogen storage tank 6, the design explosion equivalent, and the location of the municipal road to be protected, determine the reasonable protection range of the device. Use a total station to accurately locate the installation area, ensuring that the axes of hydrogen storage tank 6, the explosion-proof and shock-absorbing protection system, and the municipal road 7 on one side are parallel. Excavate according to the designed trench dimensions. The trench depth is the sum of the thickness of the reinforced soil and sand cushion layer and the height of the sand surface layer. After excavating to the subsoil layer, remove the humus and soft soil layers, level the trench bottom, and cover with a rainproof cloth during rainy weather to prevent water accumulation in the cushion layer. The specific process for determining the reasonable protection range of the protection system is as follows:

[0055] S101. Calculate the peak overpressure of the explosion shock wave and the debris dispersion distance L based on the hydrogen storage tank volume and the explosion equivalent. f First, calculate the mass of hydrogen: m = ρ·V;

[0056] Where ρ is the density of hydrogen gas; V is the volume of the hydrogen storage tank, in m³.

[0057] Calculate the explosive equivalent W using the TNT equivalent method. TNT Unit: kg

[0058] W TNT =ηm Q H / Q TNT

[0059] Where: m is the mass of hydrogen gas; η is the explosion efficiency, ranging from 0.05 to 0.15;

[0060] Q H Q is the heat of combustion of hydrogen. TNT TNT is becoming extremely popular;

[0061] By W TNT Calculate the maximum dispersion distance L of the debris f :

[0062] L f = 12 W TNT 1 / 3 ;

[0063] The attenuation law of the peak overpressure ΔP of the shock wave with distance;

[0064] S102. Determine the minimum distance based on the energy dissipation capacity of the horizontal cylindrical protective device. The main body 1 of the horizontal cylindrical body absorbs the impact kinetic energy through rotational inertia, and the axial elastic damping retaining ring dissipates the axial impact through spring + rubber buffer.

[0065] The distance L from the explosion-facing surface of the device to the hydrogen storage tank 6 must satisfy:

[0066] After the shock wave overpressure reaching the device is dissipated, the overpressure behind the embankment is ≤ 0.05 MPa (permissible value for protecting municipal roads).

[0067] L ≤ Maximum fragment scattering distance L f Furthermore, the height and strength of the grid-type baffle 4 can completely intercept debris.

[0068] Based on the layout requirements of the surrounding site conditions, the protective system is parallel to the axes of the hydrogen storage tank 6 and the municipal road 7 to ensure that the shock wave acts directly on the blast-facing surface of the cylinder. The length of the horizontal cylindrical protective device, the reinforced soil and sand cushion foundation, and the grid-type baffle covers the section of the hydrogen storage tank affected by the explosion, and extends ≥1.0 m at both ends to avoid lateral diffraction. The foundation depth and the height of the reinforced soil retaining wall are adjusted according to the site geological conditions to ensure overall stability.

[0069] S2. Construction of reinforced soil-sand cushion foundation: The plain soil layer in the foundation trench is compacted in layers, each layer is 150-200mm thick, and the compaction coefficient is ≥0.93; gravel sand fill is laid in layers, each layer is loosely laid with a thickness of 200-250mm, and compacted with a light roller, with a compaction coefficient ≥0.95; multiple layers of HDPE geogrid are laid horizontally in the middle of the cushion layer, the geogrid is stretched taut without wrinkles, and fixed with U-shaped nails, with an end anchorage length ≥0.8m; after the geogrid is laid, the top surface of the cushion layer is arc-shaped to form an arc-shaped groove that matches the bottom of the horizontal cylindrical body. At the same time, graded reinforced soil retaining walls are constructed on both sides of the reinforced sand cushion layer. Backfill soil is compacted on the outside of the reinforced soil retaining walls, and bagged soil is piled in layers on the top of the reinforced sand cushion layer and the compacted backfill soil. Finally, a sand surface layer is laid in the arc-shaped groove to form the reinforced soil-sand cushion foundation.

[0070] S3. Installation of fixed hinge support 3 and layout of central rotating shaft; Install fixed hinge support 3 at the preset position of reinforced soil and sand cushion foundation 5, and fit axial elastic damping retaining rings 8 on both ends of the central solid rotating shaft 2. Then, rotatably connect both ends of the rotating shaft 2 to the two fixed hinge supports 3 through connecting bearings, and fix and bond the rubber buffer washer 801 of the elastic damping retaining ring 8 near the fixed hinge support 3 to the fixed hinge support 3.

[0071] S4. Hoisting and assembly of the cylindrical body; hoisting and assembly of the cylindrical body 1; using a crane to hoist the cylindrical body 1, which can be composed of two half-cylinders joined together. After installation, the rotating shaft 2 is located at the center of the cylindrical body 1. The two half-cylinders are fixed in place, and the connection between the rotating shaft and the cylinder is ensured to be stable. The cylinder is manually pushed to test the smoothness of rotation and vibration. After the cylindrical body 1 is installed, the two elastic damping retaining rings 8 are respectively located between the two end faces of the cylindrical body 1 and the two fixed hinge supports 3. Then, the other set of rubber buffer washers 801 of each elastic damping retaining ring 8 is fixedly bonded to the corresponding end face of the cylindrical body 1.

[0072] S5. Installation of the grid baffle; Installation of the grid baffle; Steel columns are buried on the reinforced soil foundation in front of and behind the cylindrical body 1; The grid baffle 4 is fixed on the steel columns, ensuring that the height of the grid baffle 4 is 1.5~2.5m and the distance between the grid baffle 4 and the cylindrical body 1 is 200mm; The height of the grid baffle 4 on the side near the municipal road is higher than the entire explosion-proof and shock-absorbing protective device.

[0073] S6. Commissioning and Acceptance: Using a simulated impact tool, an impact load is applied to the blast-facing surface of the cylindrical body. The rolling response and vibration attenuation effect of the test device are tested to ensure that the impact force can be effectively dissipated through rotation and damping, and that the vertical and radial vibration displacements are within the allowable range.

[0074] Application Example: A horizontal cylindrical explosion-proof and shock-absorbing protection system is installed for a 30m³ gaseous hydrogen storage tank. It is arranged in parallel within a reasonable protection range between the hydrogen storage tank 6 and the municipal road 7 on one side. Based on the volume of the hydrogen storage tank and the site conditions, the horizontal distance between the device and the hydrogen storage tank is determined to be 8m, and the horizontal distance between the device and the edge of the municipal road is determined to be 5m.

[0075] Device parameters: Horizontal cylindrical body 1 with a diameter of 1.2m, a length of 5m, a wall thickness of 25mm, and annular reinforcing ribs on the blast-facing side spaced 300mm apart with a cross-section of 40mm×30mm; Rotating shaft 2 with a diameter of 120mm and a length of 5.5m; Elastic damper 8 with a spring diameter of 40mm and a stroke of 80mm; Reinforced sand cushion foundation with a thickness of 500mm; HDPE geogrid 502 with a tensile strength of 55kN / m; Grid-type barrier plate 4 with a height of 2.5m, internal grid holes of 50mm, and a distance of 200mm from the cylinder.

[0076] The construction method was carried out according to the above steps. The compaction coefficient of the plain soil layer was 0.94, and the compaction coefficient of the gravel and sand layer was 0.96. The cylinder was rotated smoothly when manually pushed. In the simulated impact test, the displacement was controlled within the limit. The vibration attenuation rate was ≥85%. Large-sized fragments were completely intercepted by the grid baffle. The energy of small fragments after impact was effectively dissipated. No fragments penetrated to the side of the municipal road. The acceptance was qualified.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the structural relationships and principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A municipal road explosion-proof and vibration-damping protection system near a hydrogen storage tank, characterized in that: The protection system is arranged in parallel between the hydrogen storage tank (6) and the municipal road (7) on one side. The protection system includes a horizontal cylindrical protection device, a reinforced soil and sand cushion foundation (5) and a grid baffle (4). The horizontal cylindrical protective device includes a horizontal cylindrical body (1) and fixed hinge supports (3) symmetrically arranged at both ends of the horizontal cylindrical body (1). A rotating shaft (2) is provided at the center of the horizontal cylindrical body (1). The rotating shaft (2) passes horizontally through the horizontal cylindrical body (1), and its two ends are rotatably connected to the fixed hinge supports (3) on the corresponding sides. An elastic damping retaining ring (8) is provided at the connection between the rotating shaft (2) and the fixed hinge support (3). A reinforcing component (9) is welded on the blast-facing surface of the horizontal cylindrical body (1). The rotating shaft (2) of the horizontal cylindrical body (1) is parallel to the municipal road (7). The reinforced sand cushion foundation (5) is located below the horizontal cylindrical protective device, including a bottom reinforced sand cushion layer and an upper sand surface layer (505). The reinforced sand cushion layer is a fill layer formed by alternating sand and gravel fill layer (501) and geogrid layer (502), and reinforced soil retaining walls (503) are provided on both sides of the fill layer. The geogrid layer is laid horizontally and anchored to the reinforced soil retaining walls (503) on both sides. An arc-shaped groove matching the horizontal cylindrical body (1) is formed above the reinforced sand cushion layer, and a sand surface layer (505) is laid in the arc-shaped groove. The curvature of the sand surface layer (505) matches the bottom of the horizontal cylindrical body (1). The bottom of two sets of fixed hinge supports (3) are anchored on the reinforced sand cushion foundation (5), and the lower outer surface of the horizontal cylindrical body (1) is in contact with the sand surface layer (505). Two grid baffles (4) are provided, which are respectively arranged on the side of the horizontal cylindrical protective device near the hydrogen storage tank (6) and the side near the single-sided municipal road (7). The grid baffles (4) are arranged near the horizontal cylindrical body (1) and the bottom is fixed on the reinforced soil and sand cushion foundation (5). The distance between the two grid baffles (4) and the horizontal cylindrical body (1) is 150-250mm, and the height of the grid baffles (4) is 1.5-2.5m.

2. The explosion-proof and vibration-damping protection system for municipal roads near hydrogen storage tanks according to claim 1, characterized in that: The geogrid layer (502) is made of HDPE geogrid with a tensile strength ≥50kN / m; the gravel fill layer (501) is made of gravel with a particle size ≤50mm and a compaction coefficient ≥0.95; the sand surface layer (505) is made of medium-coarse sand with a particle size of 0.25~2mm.

3. A municipal road explosion-proof and vibration-damping protection system near a hydrogen storage tank according to claim 1 or 2, characterized in that: The elastic damping retaining ring (8) includes two sets of rubber buffer washers (801) and a spring (802) connected between the two sets of rubber buffer washers (801). The elastic damping retaining ring (8) is sleeved on the part of the rotating shaft (2) located between the cylindrical body (1) and the fixed hinge support (3). One of the two sets of rubber buffer washers (801) is fixed on the outer shell of the cylindrical body (1), and the other is connected to the fixed hinge support (3).

4. A municipal road explosion-proof and vibration-damping protection system near a hydrogen storage tank according to claim 1 or 2, characterized in that: The reinforced sand cushion foundation (5) also includes compacted backfill soil layers (506) piled on both sides of the reinforced sand cushion layer and bagged soil (504) stacked in layers on top of the reinforced sand cushion layer and the compacted backfill soil layers (506).

5. A municipal road explosion-proof and vibration-damping protection system for proximity to a hydrogen storage tank according to claim 1 or 2, characterized in that: The horizontal cylindrical body (1) is made of Q345R steel; the reinforcing component (9) includes multiple strip-shaped protrusions arranged along the length of the horizontal cylindrical body (1) and parallel to each other, and the multiple strip-shaped protrusions are distributed in a ring at equal intervals on the outer wall of the horizontal cylindrical body (1).

6. A municipal road explosion-proof and vibration-damping protection system near a hydrogen storage tank according to claim 1 or 2, characterized in that: The rotating shaft (2) is a solid rotating shaft, and the two ends of the rotating shaft (2) are respectively connected to the fixed hinge support (3) through connecting bearings; the grid-type baffle (4) on the side adjacent to the municipal road (7) is higher than the overall height of the explosion-proof shock-absorbing protection device.

7. A construction method for a municipal road explosion-proof and vibration-damping protection system near a hydrogen storage tank as described in any one of claims 1 to 6, characterized in that, The specific steps are as follows: S1. Parallel positioning of the site and excavation of the foundation trench; Based on the volume of the hydrogen storage tank, the design explosion equivalent, and the location of the municipal road to be protected, determine the reasonable protection range of the device, use a total station to accurately locate the installation area, and ensure that the axes of the hydrogen storage tank, the explosion-proof and shock-absorbing protection system, and the municipal road are parallel; excavate the foundation trench according to the design trench size, the trench depth is the sum of the thickness of the reinforced soil and sand cushion layer and the height of the sand surface layer, after excavating to the plain soil layer, remove the humus and soft soil layers, level the bottom of the trench, and cover the cushion layer with a rainproof cloth during rainy weather to prevent water accumulation; S2. Construction of reinforced soil-sand cushion foundation: The plain soil layer in the foundation trench is compacted in layers, each layer is 150-200mm thick, and the compaction coefficient is ≥0.93; gravel sand fill is laid in layers, each layer is loosely laid with a thickness of 200-250mm, and compacted with a light roller, with a compaction coefficient ≥0.95; multiple layers of HDPE geogrid are laid horizontally in the middle of the cushion layer, the geogrid is stretched taut without wrinkles, and fixed with U-shaped nails, with an end anchorage length ≥0.8m; after the geogrid is laid, the top surface of the cushion layer is arc-shaped to form an arc-shaped groove that matches the bottom of the horizontal cylindrical body. At the same time, graded reinforced soil retaining walls are constructed on both sides of the reinforced sand cushion layer. Backfill soil is compacted on the outside of the reinforced soil retaining walls, and bagged soil is piled in layers on the top of the reinforced sand cushion layer and the compacted backfill soil. Finally, a sand surface layer is laid in the arc-shaped groove to form the reinforced soil-sand cushion foundation. S3. Installation of fixed hinge supports and layout of the central rotating shaft; Install fixed hinge supports at the preset positions of the reinforced soil and sand cushion foundation, and fit axial elastic damping retaining rings on both ends of the rotating shaft. Then, connect both ends of the rotating shaft to the two fixed hinge supports through connecting bearings. Adjust the level of the rotating shaft to ensure that the axial damping retaining rings and the rotating shaft can be reliably connected. S4. Cylinder body hoisting and assembly; use a crane to hoist the cylinder body onto the arc-shaped sand surface, so that the rotating shaft can be inserted into the connecting component on the inner wall of the cylinder to ensure a stable connection between the rotating shaft and the cylinder; manually push the cylinder to test the smoothness of rotation and vibration; S5. Installation of grid baffle: Steel columns are buried in the reinforced soil foundation at the front and rear of the cylindrical body; the grid baffle is fixed on the steel columns, ensuring that the height of the grid baffle is 1.5~2.5m and the distance between the grid baffle and the cylindrical body is 150~250mm; S6. Commissioning and Acceptance: Using a simulated impact tool, an impact load is applied to the blast-facing surface of the cylindrical body. The rolling response and vibration attenuation effect of the test device are tested to ensure that the impact force can be effectively dissipated through rotation and damping, and that the vertical and radial vibration displacements are within the allowable range.

8. The construction method of a municipal road explosion-proof and vibration-damping protection system near a hydrogen storage tank according to claim 7, characterized in that, In step S1, the reasonable protection range of the device is determined based on the volume of the hydrogen storage tank, the design explosion yield, and the location of the municipal road to be protected. The specific process is as follows: S101. Calculate the peak overpressure of the explosion shock wave and the debris dispersion distance L based on the hydrogen storage tank volume and the explosion equivalent. f ; First, calculate the mass of hydrogen: m = ρ·V; Where ρ is the density of hydrogen gas; V is the volume of the hydrogen storage tank, in m³. Calculate the explosive equivalent W using the TNT equivalent method. TNT Unit: kg W TNT =ηm Q H / Q TNT Where: m is the mass of hydrogen gas; η is the explosion efficiency, ranging from 0.05 to 0.15; Q H The heat of combustion of hydrogen, Q TNT TNT is becoming extremely popular; By W TNT Calculate the maximum dispersion distance L of the debris f : L f = 12 W TNT 1 / 3 S102. The distance L from the blast-facing side of the horizontal cylindrical protective device to the hydrogen storage tank ≤ the maximum fragmentation distance L. f The height and strength of the grid-type baffle meet the requirements for intercepting debris.

9. A construction method for a municipal road explosion-proof and vibration-damping protection system near a hydrogen storage tank according to claim 7 or 8, characterized in that: In step S3, the two ends of the elastic damping retaining ring are connected to the end faces of the adjacent fixed hinge support and the main body of the cylinder, respectively; in step S4, the main body of the cylinder is installed by butt joint of two half cylinders; in step S6, the compaction degree of the reinforced soil and sand cushion layer, the tensile strength of the grid, and the reliability of the connection of each component are tested, and the construction is completed after all the standards are met.

10. A construction method for a municipal road explosion-proof and vibration-damping protection system near a hydrogen storage tank according to claim 8, characterized in that: The length of the horizontal cylindrical protective device, the reinforced soil and sand cushion foundation, and the grid baffle covers the section of the hydrogen storage tank affected by the explosion, and extends ≥1.0 m at each end.

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