Safety protection device for liquid oxygen blasting close to existing high-speed slope roadbed

Abstract

This invention provides a safety protection device for liquid oxygen energy blasting adjacent to existing highway slope subgrade, belonging to the field of slope subgrade blasting technology. It includes a blasting cylinder with a liquid oxygen chamber for filling; a filling cylinder with a filling chamber for filling a liquid oxygen fuel mixture; a first flow channel connecting the liquid oxygen chamber and the filling chamber; a sealing plate for closing or opening the first flow channel; an energy-absorbing plate disposed on one side of the blasting cylinder; an extension plate fixedly disposed at the end of the energy-absorbing plate near the ground, with the blasting cylinder and the extension plate located on the same side of the energy-absorbing plate; the extension plate having an arc-shaped arrangement on the side near the blasting cylinder; a tear slit along the length of the blasting cylinder on the inner wall of the liquid oxygen chamber, located away from the energy-absorbing plate; and ignition components disposed at the center of both ends of the blasting cylinder along its axial direction. This invention enables precise directional blasting, reducing environmental impact, especially avoiding damage to important facilities such as highways, thereby improving construction safety and environmental friendliness.

Description

Technical Field

[0001] This invention relates to the field of slope and roadbed blasting technology, and more specifically, to a safety protection device for liquid oxygen energy blasting adjacent to an existing highway slope and roadbed. Background Technology

[0002] Existing slope blasting methods typically employ explosives, but this approach presents significant environmental pollution and safety hazards. Firstly, the impact of explosive blasts largely spreads outwards, especially during slope operations, where the resulting shockwaves and debris can severely impact the surrounding environment. Post-blast dust pollution is particularly pronounced, especially near busy traffic areas like highways. This dust not only affects the quality of life for nearby residents but can also pose a threat to highway traffic safety. Dust, gravel, and solid explosives can sometimes drift onto the highway surface, potentially causing damage, increasing maintenance costs, and even leading to vehicle accidents.

[0003] Furthermore, explosive blasting not only releases impact force but also produces harmful substances through combustion. These substances are dispersed into the air after the blast, further exacerbating environmental pollution. For example, the toxic gases, dust, and residues released after explosive combustion not only affect air quality but may also pollute surrounding soil and water sources, threatening the ecological environment.

[0004] Furthermore, explosive blasting generates vibrations when releasing energy, which may potentially impact nearby buildings, bridges, and other infrastructure. To better address this issue, this application proposes a safety protection device for liquid oxygen-fired blasting adjacent to existing highway slope subgrade. Summary of the Invention

[0005] The purpose of this invention is to provide a safety protection device for liquid oxygen energy blasting adjacent to existing highway slope subgrade. It aims to reduce the impact on the environment through precise directional blasting, especially to avoid damage to important facilities such as highways, thereby improving construction safety and environmental friendliness.

[0006] The embodiments of the present invention are achieved through the following technical solutions:

[0007] A safety protection device for liquefied oxygen-fueled blasting of roadbed adjacent to an existing highway slope includes:

[0008] A blasting tube, wherein a liquid oxygen chamber for filling liquid oxygen is provided inside the blasting tube, and the thickness of the end wall at both ends of the blasting tube gradually decreases towards the axis.

[0009] A packing cylinder, wherein a packing chamber for filling a liquid oxygen fuel mixture is provided inside the packing cylinder;

[0010] The first flow channel is used to connect the liquid oxygen chamber and the packing chamber;

[0011] A sealing plate, used to close or open the first flow channel;

[0012] A drive assembly is used to drive the sealing plate to open the first flow channel and simultaneously drive the liquid oxygen fuel mixture in the filling chamber into the liquid oxygen chamber.

[0013] An energy-absorbing plate is disposed on one side of the blasting cylinder. The area of ​​the energy-absorbing plate itself is larger than the projected area of ​​the blasting cylinder along the energy-absorbing plate. An energy-absorbing chamber is formed inside the energy-absorbing plate.

[0014] An extension plate is fixedly disposed at one end of the energy-absorbing plate near the ground, and the blasting cylinder and the extension plate are located on the same side of the energy-absorbing plate, with the side of the extension plate near the blasting cylinder being arc-shaped.

[0015] The tearing seam is formed along the length of the blasting tube on the inner wall of the liquid oxygen chamber and located on the side away from the energy-absorbing plate. Multiple tearing seams are provided and are evenly arranged along the peripheral wall of the liquid oxygen chamber away from the energy-absorbing plate. At the same time, the depth of the tearing seam gradually increases from the middle of the blasting tube toward its two ends.

[0016] An ignition assembly is disposed at the center of both ends of the blasting cylinder along the axial direction.

[0017] Furthermore, a guide portion is provided on the inner wall of the liquid oxygen chamber near the energy-absorbing plate. The guide portion is V-shaped, and the V-shaped tip of the guide portion is positioned away from the energy-absorbing plate.

[0018] Furthermore, each of the tear seams is provided with multiple welding points, and the spacing between the multiple welding points gradually increases from the middle of the rupture cylinder toward both ends;

[0019] And / or, tear guide slits are provided at both ends of the inner wall of the liquid oxygen chamber along the axial direction, and the tear guide slits are respectively connected to the ends of the multiple tear slits.

[0020] Furthermore, the energy-absorbing chamber includes a first chamber and a second chamber, which are isolated from each other. The first chamber is located on the side facing the blasting cylinder, and the second chamber is located on the side closer to the ground. The first chamber has vent holes on the side closer to the blasting cylinder, and the second chamber is arranged in a grid pattern and used to fill concrete. The top of the extension plate has a filling groove for filling concrete.

[0021] Furthermore, a deformable plate is fixedly installed in the first chamber. The deformable plate is arranged along the axial direction of the blasting cylinder. An impact fracturing section is disposed on the deformable plate. The thickness of the impact fracturing section is less than the thickness of the deformable plate.

[0022] Furthermore, a shock-absorbing plate is fixedly installed between the blasting cylinder and the energy-absorbing plate.

[0023] Furthermore, the drive assembly includes a push plate, a push rod, and a pusher. The push plate is slidably disposed in the packing chamber. One end of the push rod is fixedly connected to the push plate, and the other end extends out of the packing cylinder. The pusher is used to push the push rod to drive the push plate to push the liquid oxygen fuel mixture into the liquid oxygen chamber.

[0024] Furthermore, the drive assembly also includes a connecting rod and a stop rod. The connecting rod is fixedly connected to one end of the push rod that extends out of the packing cylinder. The stop rod is L-shaped. The sealing plate is slidably disposed at the bottom wall of the packing chamber and blocks the first flow channel. One end of the sealing plate slides out of the packing chamber. A locking bolt threaded onto the outer wall of the packing cylinder is disposed on the sealing plate. One end of the stop rod is fixedly connected to the sealing plate, and the other end is supported by the connecting rod.

[0025] Furthermore, the first flow channel is bifurcated at one end that enters the liquid oxygen chamber and forms a pair of inlets. The pair of inlets are constricted and located on the V-shaped walls on both sides of the guide portion. A pair of protrusions are fixedly provided on the inner wall of the liquid oxygen chamber. The pair of protrusions are respectively located above the pair of inlets, and the cross-section of the protrusions is hook-shaped.

[0026] Furthermore, an insertion plate is fixedly provided on the bottom wall of the energy-absorbing plate, the bottom wall of the insertion plate is provided in a pointed cone shape, and multiple reinforcing ribs are fixedly provided between the energy-absorbing plate and the insertion plate.

[0027] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0028] 1. This invention, by incorporating energy-absorbing plates and extension plates, aims to prevent the release of blast energy from one side of these components and effectively absorb the impact force. The arc-shaped surface of the extension plate guides the release direction of the impact force, making it easier for the blast energy to impact the side away from the energy-absorbing plate, preventing the impact force from being released directly from the top and preventing dust and debris from flying towards sensitive areas such as highways. Furthermore, the energy-absorbing plate must be installed facing the highway side to minimize the impact on the highway. The tear slit design is along the length of the blasting tube, gradually deepening from the middle towards both ends. This allows the impact force to be released more quickly from both sides, controlling the direction of the lateral blast impact force and reducing the amount of blast impact force hitting the highway side. The gradually thinning end wall thickness along the axial center of the blasting tube and the installation of ignition components on both sides of the blasting tube further facilitate the release of impact force from both sides, further improving the accuracy of directional blasting. Simultaneously, the drive assembly opens the first flow channel by driving the enclosed plate, ensuring the smooth flow of the liquid oxygen and fuel mixture under safe conditions and preventing premature contact between the liquid oxygen and fuel mixture, thereby improving the safety of the entire blasting process. Through these technological optimizations, this invention not only improves construction safety but also effectively reduces environmental pollution and facility damage caused by traditional blasting methods.

[0029] 2. This invention further optimizes the release of blast energy by incorporating multiple welding points. Multiple welding points are provided on each tear seam, with the spacing between these points gradually increasing from the center to both ends of the blasting tube. This design ensures that the impact force is released rapidly and systematically from both sides of the blasting tube, while increasing the strength of the blasting tube and preventing excessive concentration of impact force. This effectively reduces potential damage to the environment and facilities, while improving the controllability and safety of the blast.

[0030] Furthermore, tear guide slits are provided at both ends of the inner wall of the liquid oxygen chamber along the axial direction. These guide slits are respectively connected to the ends of multiple tear slits. The tear guide slits further optimize the release path of the explosive energy, enabling the energy in the liquid oxygen chamber to be released in an orderly manner along a predetermined direction and to rapidly release the explosive impact force from both sides of the blasting tube. This ensures the directional release of explosive energy, improves the efficiency and accuracy of the blasting process, and reduces unnecessary vibration and dust pollution. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the overall structure of the safety protection device for liquid oxygen energy blasting adjacent to the existing highway slope subgrade provided by the present invention.

[0033] Figure 2 A cross-sectional view of the safety protection device for liquid oxygen energy blasting adjacent to the existing highway slope subgrade provided by the present invention.

[0034] Figure 3 This invention is intended to illustrate the internal structure of the drive assembly and the blasting cylinder;

[0035] Figure 4 This invention aims to illustrate the internal structure of the blasting cylinder and the packing cylinder;

[0036] Figure 5 This is a schematic diagram illustrating the structure of the tear seam and tear guide seam of the blasting tube, which is intended to demonstrate the present invention.

[0037] Figure 6 For the present invention Figure 5 Enlarged view of section A;

[0038] Icons: 1-Explosion tube, 11-Liquid oxygen chamber, 111-Tear seam, 1111-Tear guide seam, 1112-Weld point, 112-Guide section, 113-Protrusion, 12-First flow channel, 121-Inlet, 2-Stuffing tube, 21-Stuffing chamber, 22-Gas nozzle, 3-Sealing plate, 30-Handle, 31-Locking bolt, 4-Drive assembly, 41-Push plate, 42-Push rod, 43-Pushing component, 431-Tension spring, 44-Connecting rod, 45-Stop bar, 5-Energy absorbing plate, 50-Energy absorbing chamber, 51-First chamber, 511-Gas hole, 512-Deformation plate, 5121-Impact fracturing section, 52-Second chamber, 6-Extension plate, 61-Filling groove, 62-Side plate, 7-Ignition assembly, 71-Spark plug, 8-Shock damping plate, 9-Insert plate, 91-Reinforcing rib. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] Example

[0042] The following description, in conjunction with specific embodiments, provides further details. Figures 1-6 As shown, this invention is a safety protection device for liquid oxygen energy blasting adjacent to an existing highway slope subgrade. It should be noted that before installing the blasting cylinder 1 and energy-absorbing plate 5 as a whole, a blasting hole with a depth of approximately 2 to 5 meters needs to be excavated at the construction site using mechanical equipment. The size of this blasting hole must be sufficient to accommodate the entire structure of the blasting cylinder 1 and energy-absorbing plate 5 to ensure stable installation. The energy-absorbing plate 5 must be installed facing the highway side. After placing the blasting cylinder 1 and energy-absorbing plate 5 into the blasting hole, the detonating cord must be routed to a safe detonation area, and fine sand must be filled in to compact the blasting cylinder 1 and energy-absorbing plate 5, ensuring their stability during the blasting process.

[0043] In the design of the blasting cylinder 1, it is usually made of high-strength alloy steel or stainless steel. The blasting cylinder 1 has a liquid oxygen chamber 11 for filling with liquid oxygen. One side of the blasting cylinder 1 has a semi-circular arc cross section, and the other side has a square cross section. The square part is mostly solid, which increases the structural strength of the blasting cylinder 1 and enables it to effectively resist unnecessary deformation under external pressure. The wall thickness of the two ends of the blasting cylinder 1 gradually decreases towards the axis. The packing cylinder 2 is fixedly installed above the blasting cylinder 1. The packing cylinder 2 has a packing chamber 21 for filling with liquid oxygen fuel mixture. Both the blasting cylinder 1 and the packing cylinder 2 are equipped with gas nozzles 22. The gas nozzles 22 adopt a one-way flow structure to ensure that the liquid oxygen and liquid oxygen fuel mixture will not leak out, avoiding potential hazards to the surrounding environment or construction personnel.

[0044] The first flow channel 12 connects the liquid oxygen chamber 11 and the packing chamber 21 and is located on both chambers, ensuring that liquid oxygen and the liquid oxygen fuel mixture can flow smoothly into the liquid oxygen chamber 11 when needed. The design of the first flow channel 12 ensures efficient fluid transfer while preventing unnecessary leakage. The sealing plate 3 is a key component used to close or open the first flow channel 12. The sealing plate 3 employs a reliable sealing structure to ensure that the liquid oxygen fuel mixture only enters the liquid oxygen chamber 11 through the first flow channel 12 when needed.

[0045] The drive assembly 4 is used to drive the opening or closing of the sealing plate 3. Its driving method can be electric, pneumatic, or hydraulic, etc., and the most suitable driving method is selected according to actual needs. Through the action of the drive assembly 4, the sealing plate 3 can precisely open the first flow channel 12, allowing the liquid oxygen fuel mixture to enter the liquid oxygen chamber 11 from the packing chamber 21. The function of the drive assembly 4 is not limited to opening the sealing plate 3; it also uses its mechanical force to push the liquid oxygen fuel mixture in the packing chamber 21 into the liquid oxygen chamber 11, thereby completing the mixing process.

[0046] The energy-absorbing plate 5 is positioned on one side of the square portion of the blasting tube 1, with the blasting tube 1 located near the bottom of the side wall of the energy-absorbing plate 5. The height of the energy-absorbing plate 5 needs to be selected based on the specific blast hole, with at least a small difference between the two. Its width on both sides needs to extend at least 20-50mm beyond the length of the blasting tube 1. In terms of design, the area of ​​the energy-absorbing plate 5 itself is larger than the projected area of ​​the blasting tube 1 along the energy-absorbing plate 5. This design effectively expands the contact area of ​​the energy-absorbing plate 5, thereby improving its ability to absorb blast impact. Energy-absorbing chambers 50 are formed within the energy-absorbing plate 5. These chambers help absorb and disperse the shock wave during the explosion, reducing the impact on the surrounding environment during the blast.

[0047] The outer extension plate 6 is fixedly welded to the end of the energy-absorbing plate 5 near the ground. The main function of the outer extension plate 6 is to guide the release direction of the impact force and enhance the stability of the energy-absorbing plate 5. The side of the outer extension plate 6 near the blasting cylinder 1 is arc-shaped. This design has important functions: First, the arc-shaped surface can effectively guide the impact force, ensuring that the blast energy is mainly released from the back side of the energy-absorbing plate 5, rather than from the top or other undesirable directions. Second, the arc-shaped surface can reasonably distribute the stress generated during the blasting process, preventing the shock wave from directly spreading to the highway or surrounding sensitive areas, thereby reducing the potential threat to the environment.

[0048] Tear slits 111 are formed along the length of the blasting tube 1 on the inner wall of the liquid oxygen chamber 11 and located on the side away from the energy-absorbing plate 5. Multiple tear slits 111 are provided and are evenly arranged along the peripheral wall of the liquid oxygen chamber 11 away from the energy-absorbing plate 5. This arrangement can ensure that the liquid oxygen chamber 11 releases energy evenly during the explosion, thereby effectively guiding the distribution of explosion energy and reducing the concentrated release of energy. At the same time, the depth of the tear slits 111 gradually increases from the middle of the blasting tube 1 toward both ends, which helps to ensure a more uniform distribution of the impact force during the explosion.

[0049] The ignition assembly 7 employs electric ignition, specifically using spark plug 71. Spark plug 71, as an ignition device, offers advantages such as simple structure, fast response speed, and high stability, effectively initiating the reaction of the liquid oxygen fuel mixture within the blasting cylinder 1. In this embodiment, the ignition assembly 7 is positioned at the center of both ends of the axial direction of the blasting cylinder 1. This location is chosen to control the precise ignition point, thereby better controlling the explosion's initiation point and ensuring the release of explosion energy in the designed direction and manner. The use of spark plug 71 as the ignition device makes the ignition process more controllable, enabling remote control and precise triggering, thus enhancing safety.

[0050] Reference Figure 3 and Figure 4The inner wall of the liquid oxygen chamber 11, near the energy-absorbing plate 5, is integrally formed with a guide portion 112. The guide portion 112 is V-shaped, with its V-shaped tip facing away from the energy-absorbing plate 5. The function of the guide portion 112 is to guide the energy and shock wave released during the explosion, causing it to spread in a predetermined direction and minimizing the impact on one side of the energy-absorbing plate 5. Because the guide portion 112 is V-shaped and its tip faces away from the energy-absorbing plate 5, it can effectively guide the impact force of the explosion to both sides, thereby avoiding the impact force from concentrating on one side of the energy-absorbing plate 5, ensuring a uniform distribution of the explosion energy, and reducing unnecessary damage to the surrounding structure or environment.

[0051] Furthermore, each tear slit 111 is provided with multiple weld points 1112, with the spacing between the weld points 1112 gradually increasing from the middle of the blasting cylinder 1 towards both ends. The purpose of the weld points 1112 is to control the opening process of the tear slit 111, ensuring that it can crack according to a predetermined pattern during blasting. Specifically, the spacing of the weld points 1112 gradually increases from the middle to both ends, which helps to achieve more precise and controllable crack propagation during blasting.

[0052] As an optional embodiment, tear guide slits 1111 are provided at both ends of the inner wall of the liquid oxygen chamber 11 along the axial direction, and the tear guide slits 1111 are respectively connected to the two ends of the multiple tear slits 111.

[0053] Reference Figure 2 The energy-absorbing chamber 50 includes a first chamber 51 and a second chamber 52, which are isolated from each other. The first chamber 51 is located on the side facing the blasting cylinder 1, while the second chamber 52 is located on the side closer to the ground. The first chamber 51 has vents 511 on the side closer to the blasting cylinder 1 to regulate airflow and help balance the pressure waves generated during the blast. The second chamber 52 is arranged in a grid pattern and is mainly used to fill concrete to enhance its impact resistance and energy absorption performance. A filling groove 61 for filling concrete is provided on the top of the extension plate 6. This design ensures uniform concrete filling and structural integrity, thereby improving the overall impact resistance of the energy-absorbing plate 5.

[0054] Reference Figure 2A deformable plate 512 is fixedly welded into the first chamber 51. The deformable plate 512 is arranged along the axial direction of the blasting cylinder 1. An impact fracturing section 5121 is disposed on the deformable plate 512, located in the middle of the deformable plate 512. The thickness of the impact fracturing section 5121 is less than the thickness of the deformable plate 512, thereby ensuring that the shock wave can act on the impact fracturing section 5121 first during the blasting process, forming local fracturing and further consuming energy. This structural design can effectively absorb and uniformly disperse the shock wave energy generated by the blasting, reduce the propagation of vibration, and ensure the directional release of blasting energy, improving the accuracy and safety of the blasting.

[0055] As an optional embodiment, a vibration damping plate 8 is fixedly installed between the blasting cylinder 1 and the energy-absorbing plate 5. The vibration damping plate 8 can be made of high-performance energy-absorbing materials such as rubber, polyurethane, silicone, or composite materials to effectively attenuate the vibration and impact generated during the blasting process. These materials have excellent elasticity, impact resistance, and fatigue resistance, which can reduce the propagation of vibration to the surrounding environment, thereby mitigating the impact on highways, slope subgrades, and other facilities. Through the installation of the vibration damping plate 8, the vibration energy generated by the blasting can be effectively absorbed and dispersed, reducing potential damage to the external environment of the construction area, improving construction safety, and ensuring the smooth progress of the construction process and environmental friendliness.

[0056] Reference Figure 1 and Figure 4 The drive assembly 4 includes a push plate 41, a push rod 42, and a pusher 43. The push plate 41 is slidably disposed in the filling chamber 21. One end of the push rod 42 is fixedly connected to the push plate 41, and the other end extends through the top of the filling cylinder 2. In this embodiment, multiple push rods 42 are installed in parallel. The pusher 43 is used to push the push rod 42 to drive the push plate 41 to push the liquid oxygen fuel mixture into the liquid oxygen chamber 11. In this embodiment, the pusher 43 is selected as a tension spring 431. The tension spring 431 corresponds one-to-one with the push rod 42 and is sleeved on the push rod 42. When selecting the tension of the tension spring 431, it should be selected to be sufficient to drive the push plate 41 to push the liquid oxygen fuel mixture into the liquid oxygen chamber 11. Of course, in other embodiments, the pusher 43 can be an electric push rod 42.

[0057] Furthermore, the drive assembly 4 also includes a connecting rod 44 and a stop rod 45. The connecting rod 44 is fixedly connected to one end of multiple push rods 42 that protrude from the stuffing cylinder 2, and connects all the push rods 42 together. The stop rod 45 is L-shaped. The sealing plate 3 is slidably disposed at the bottom wall of the stuffing chamber 21 and blocks the first flow channel 12. One end of the sealing plate 3 slides out of the stuffing chamber 21 and is welded with a handle 30. A locking bolt 31 threadedly connected to the outer wall of the stuffing cylinder 2 is passed through the sealing plate 3. One end of the stop rod 45 is fixedly connected to the sealing plate 3, and the other end is supported by the connecting rod 44. In this way, only after the locking bolt 31 is loosened can a part of the sealing plate 3 be pulled out, and the stop rod 45 will disengage from the support of the connecting rod 44. In this state, the push plate 41, under the action of the tension spring 431, begins to push the liquid oxygen fuel mixture into the liquid oxygen chamber 11, thereby achieving a safe separation of liquid oxygen and liquid oxygen fuel mixture. This design effectively prevents the liquid oxygen and liquid oxygen fuel mixture from mixing prematurely without proper operation, preventing potential dangers.

[0058] The safety of the entire system is enhanced by ensuring that the movement of the sealing plate 3 only occurs after the locking bolt 31 is loosened. Thus, only after the locking bolt 31 is loosened can a portion of the sealing plate 3 be pulled out, allowing the stop rod 45 to disengage from the support of the connecting rod 44. In this state, the push plate 41, under the action of the tension spring 431, begins to push the liquid oxygen fuel mixture into the liquid oxygen chamber 11, thereby achieving a safe separation of liquid oxygen and the liquid oxygen fuel mixture. This design effectively prevents premature mixing of liquid oxygen and the liquid oxygen fuel mixture without proper operation, preventing potential hazards. The safety of the entire system is enhanced by ensuring that the movement of the sealing plate 3 only occurs after the locking bolt 31 is loosened.

[0059] Reference Figure 3 and Figure 4 The first flow channel 12, connected to the end entering the liquid oxygen chamber 11, is bifurcated and forms a pair of inlets 121. The bifurcation of the first flow channel 12 is Y-shaped, and the pair of inlets 121 are constricted. The pair of inlets 121 are located on the V-shaped walls on both sides of the guide section 112. The inner wall of the liquid oxygen chamber 11 is integrally formed with a pair of protrusions 113, which are spaced apart above the pair of inlets 121. The purpose of this design is to guide the flow of liquid oxygen and the liquid oxygen fuel mixture, promoting their uniform mixing. The protrusions 113 are hook-shaped, with a cross-sectional shape resembling the curved part of an eagle's beak. This design not only effectively guides the flow of liquid oxygen but also enhances the contact between liquid oxygen and the liquid oxygen fuel mixture, thereby improving mixing efficiency. The hook-shaped design allows the liquid oxygen to generate a certain turbulence effect when flowing through the protrusions 113, further accelerating the fusion of the liquid oxygen and fuel mixture and ensuring the stability and safety of the mixture.

[0060] The design of this structure has important functional benefits. The beak-like curved shape of the protrusion 113 effectively controls the flow direction of liquid oxygen, preventing uneven distribution of liquid oxygen within the chamber, thereby ensuring uniform mixing and reaction efficiency. Because the shape of the protrusion 113 is combined with fluid dynamics principles, the flow of liquid oxygen is properly guided as it passes through this structure, reducing potential hazards caused by insufficient mixing of liquid oxygen and fuel.

[0061] Reference Figure 1 and Figure 3 The bottom wall of the energy-absorbing plate 5 is connected to the insertion plate 9 by fixed welding. The design of the insertion plate 9 allows it to be easily inserted into the slope subgrade, thus providing better stability during blasting impact and preventing displacement or deformation of the energy-absorbing plate 5 under the action of blasting force. At the same time, the structure of the insertion plate 9 facilitates the fixing of the energy-absorbing plate 5 in the slope subgrade, ensuring that it can maintain a stable working state throughout the blasting process. Side plates 62 are also fixedly welded to both sides of the energy-absorbing plate 5. The side plates 62 have an overall V-shaped design. This shape not only facilitates the insertion of the energy-absorbing plate 5, but also ensures more accurate overall positioning of the energy-absorbing plate 5 during installation, thereby improving installation efficiency and stability.

[0062] The bottom wall of the insert plate 9 is designed in a pointed cone shape, which further improves the contact stability between the insert plate 9 and the slope subgrade, ensuring that the energy-absorbing plate 5 can be firmly embedded in the slope subgrade and avoiding loosening or displacement that may occur during blasting. In order to enhance the strength of the overall structure, multiple reinforcing ribs 91 are also welded between the energy-absorbing plate 5 and the insert plate 9. These reinforcing ribs 91 can effectively improve the overall impact resistance and durability of the energy-absorbing plate 5, ensuring that the energy-absorbing plate 5 can work stably for a long time in complex blasting environments.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A safety protection device for liquid oxygen energy blasting adjacent to an existing highway slope subgrade, characterized in that: include: A blasting tube (1) is provided with a liquid oxygen chamber (11) for filling liquid oxygen. The thickness of the end walls of the blasting tube (1) gradually decreases towards the axis along the axial direction. A packing cylinder (2) is provided with a packing chamber (21) for filling a liquid oxygen fuel mixture; The first flow channel (12) is used to connect the liquid oxygen chamber (11) and the packing chamber (21); A sealing plate (3) is used to close or open the first flow channel (12); Drive assembly (4), which is used to drive the sealing plate (3) to open the first flow channel (12) and at the same time drive the liquid oxygen fuel mixture in the filling chamber (21) into the liquid oxygen chamber (11); An energy-absorbing plate (5) is provided on one side of the blasting cylinder (1). The area of ​​the energy-absorbing plate (5) is larger than the projected area of ​​the blasting cylinder (1) along the energy-absorbing plate (5). An energy-absorbing chamber (50) is provided inside the energy-absorbing plate (5). An extension plate (6) is fixedly disposed at one end of the energy-absorbing plate (5) near the ground, and the blasting cylinder (1) and the extension plate (6) are located on the same side of the energy-absorbing plate (5). The side of the extension plate (6) near the blasting cylinder (1) is arranged in an arc shape. Tear slits (111) are formed along the length of the blasting tube (1) on the inner wall of the liquid oxygen chamber (11) and located on the side away from the energy-absorbing plate (5). Multiple tear slits (111) are provided and are evenly arranged along the peripheral wall of the liquid oxygen chamber (11) away from the energy-absorbing plate (5). At the same time, the depth of the tear slits (111) gradually increases from the middle of the blasting tube (1) toward its two ends. Ignition assembly (7), the ignition assembly (7) is disposed at the center of both ends of the blasting cylinder (1) along the axial direction; A guide portion (112) is provided on the inner wall of the liquid oxygen chamber (11) near the energy-absorbing plate (5). The guide portion (112) is V-shaped, and the V-shaped tip of the guide portion (112) is away from the energy-absorbing plate (5). The drive assembly (4) includes a push plate (41), a push rod (42), and a pusher (43). The push plate (41) is slidably disposed in the packing chamber (21). One end of the push rod (42) is fixedly connected to the push plate (41), and the other end passes through the packing cylinder (2). The pusher (43) is used to push the push rod (42) to drive the push plate (41) to push the liquid oxygen fuel mixture into the liquid oxygen chamber (11). The first flow channel (12) is bifurcated at one end that enters the liquid oxygen chamber (11) and forms a pair of inlets (121). The pair of inlets (121) are constricted and located on the V-shaped walls on both sides of the guide (112). A pair of protrusions (113) are fixedly provided on the inner wall of the liquid oxygen chamber (11). The pair of protrusions (113) are respectively located above the pair of inlets (121). The cross-section of the protrusions (113) is hook-shaped. An insertion plate (9) is fixedly provided on the bottom wall of the energy-absorbing plate (5). The bottom wall of the insertion plate (9) is cone-shaped. Multiple reinforcing ribs (91) are fixedly provided between the energy-absorbing plate (5) and the insertion plate (9).

2. The safety protection device for liquid oxygen energy blasting in close proximity to the existing high-speed slope roadbed according to claim 1, characterized in that: Each of the tear seams (111) is provided with a plurality of weld points (1112), and the distance between the plurality of weld points (1112) gradually increases from the middle of the blasting tube (1) toward both ends; And / or, tear guide slits (1111) are provided at both ends of the inner wall of the liquid oxygen chamber (11) along the axial direction, and the tear guide slits (1111) are respectively connected to the two ends of the multiple tear slits (111).

3. The safety protection device for liquid oxygen energy blasting adjacent to existing highway slope subgrade as described in claim 2, characterized in that: The energy-absorbing chamber (50) includes a first chamber (51) and a second chamber (52). The first chamber (51) and the second chamber (52) are isolated from each other. The first chamber (51) is located on the side facing the blasting cylinder (1), and the second chamber (52) is located on the side closer to the ground. The first chamber (51) has an air hole (511) on the side closer to the blasting cylinder (1). The second chamber (52) is arranged in a grid pattern and is used to fill concrete. The top of the extension plate (6) has a filling groove (61) for filling concrete.

4. The safety protection device for liquid oxygen energy blasting adjacent to existing highway slope subgrade as described in claim 3, characterized in that: A deformable plate (512) is fixedly installed in the first chamber (51). The deformable plate (512) is arranged along the axial direction of the blasting cylinder (1). An impact fracturing part (5121) is arranged on the deformable plate (512). The thickness of the impact fracturing part (5121) is less than the thickness of the deformable plate (512).

5. The safety protection device for liquid oxygen energy blasting of roadbed adjacent to existing highway slopes as described in claim 4, characterized in that: A shock-absorbing plate (8) is fixedly installed between the blasting cylinder (1) and the energy-absorbing plate (5).

6. The safety protection device for liquid oxygen energy blasting of roadbed adjacent to existing highway slopes as described in claim 5, characterized in that: The drive assembly (4) also includes a connecting rod (44) and a stop rod (45). The connecting rod (44) is fixedly connected to one end of the push rod (42) that protrudes from the packing cylinder (2). The stop rod (45) is L-shaped. The sealing plate (3) is slidably disposed at the bottom wall of the packing chamber (21) and blocks the first flow channel (12). One end of the sealing plate (3) slidably protrudes from the packing chamber (21). A locking bolt (31) threadedly connected to the outer wall of the packing cylinder (2) is provided on the sealing plate (3). One end of the stop rod (45) is fixedly connected to the sealing plate (3), and the other end is supported by the connecting rod (44).

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