High slope excavation subgrade liquid oxygen energy accurate blasting device and method

Abstract

The invention provides a high slope excavation subgrade liquid oxygen energy accurate blasting device, which belongs to the technical field of high slope subgrade blasting, and comprises a blasting cartridge, the blasting cartridge is provided with a liquid oxygen chamber and a liquid oxygen fuel mixture chamber from bottom to top, the liquid oxygen chamber and the liquid oxygen fuel mixture chamber are separated from each other, and the blasting cartridge is provided with an air tap. A plurality of cracks are formed in the inner circumferential wall of the liquid oxygen chamber in the circumferential direction, the depths of the cracks are gradually shallower in the direction of the blasting cartridge from bottom to top, and a communicating hole is formed between the liquid oxygen chamber and the liquid oxygen fuel mixture chamber; the sealing plate is used for blocking or opening the communicating hole; the driving assembly is used for driving the sealing plate to open the communicating hole and driving a liquid oxygen fuel mixture in the liquid oxygen fuel mixture chamber to enter the liquid oxygen chamber; and the ignition assembly is arranged below the liquid oxygen chamber. Through the unique structural design of the blasting device, accurate directional blasting can be achieved to the maximum extent, and environmental pollution and damage are effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of high-slope roadbed blasting technology, and in particular to a liquid oxygen energy precise blasting device and method for high-slope excavation roadbed. Background Art

[0002] In the existing high-slope excavation roadbed construction, explosive blasting technology is often used to achieve the purpose of rapid rock breaking. However, there are many problems with explosive blasting, especially the negative impact on the environment. First, the impact force generated by explosive blasting mainly spreads outward, causing great damage to the surrounding rock, soil and vegetation, affecting the ecological environment in the construction area and its surroundings. Secondly, a large amount of smoke and harmful gases will be released during the blasting process, causing serious air pollution and dust diffusion, affecting the health of construction workers and the quality of life of surrounding residents. In addition, the traditional explosive blasting technology has the problem of insufficient control accuracy, which can easily lead to unsatisfactory blasting effects and even safety hazards.

[0003] In order to solve these problems, the applicant has proposed a new blasting device after long-term practice - liquid oxygen energy precise directional blasting. Liquid oxygen energy blasting has the characteristics of high energy density and strong controllability, which can achieve precise blasting and minimize the impact on the surrounding environment, especially reducing the dust and pollutant emissions generated by blasting. This technology not only helps to improve construction safety, but also effectively reduce environmental pollution and damage, and has high environmental value and application prospects. Summary of the invention

[0004] The object of the present invention is to provide a liquid oxygen energy precise blasting device and method for high slope excavation roadbed, which can realize precise directional blasting to the greatest extent through the unique structural design of the blasting device and effectively reduce environmental pollution and damage.

[0005] In the first aspect, the embodiments of the present invention are implemented by the following technical solutions:

[0006] A liquid oxygen energy precision blasting device for high slope excavation roadbed, comprising:

[0007] A blasting tube, wherein the blasting tube is provided with a liquid oxygen chamber and a liquid oxygen-fuel mixture chamber from bottom to top, the liquid oxygen chamber and the liquid oxygen-fuel mixture chamber are separated from each other, the blasting tube is provided with gas nozzles for filling the liquid oxygen chamber and the liquid oxygen-fuel mixture chamber with liquid oxygen and liquid oxygen-fuel mixture respectively, a plurality of cracks are provided on the inner circumferential wall of the liquid oxygen chamber along the circumferential direction, the depth of the cracks gradually becomes shallower along the direction from bottom to top of the blasting tube, and a connecting hole is provided between the liquid oxygen chamber and the liquid oxygen-fuel mixture chamber;

[0008] A sealing plate, the sealing plate is used to block or open the communicating hole;

[0009] A driving assembly, the driving assembly is used to drive the sealing plate to open the communicating hole, and at the same time to drive the liquid oxygen-fuel mixture in the liquid oxygen-fuel mixture chamber into the liquid oxygen chamber;

[0010] An ignition assembly is arranged below the liquid oxygen chamber.

[0011] Furthermore, a rupture annular seam is circumferentially arranged below the liquid oxygen chamber and at the position of the rupture seam, and the rupture annular seam is connected with all the rupture seams;

[0012] And / or, a rupture annular seam is circumferentially arranged in the middle of the liquid oxygen chamber and located at the position of the rupture seam, and the rupture annular seam is connected with all the rupture seams.

[0013] Furthermore, each of the cracks is provided with a plurality of welding spots from bottom to top, and the intervals between the plurality of welding spots along the crack from bottom to top gradually decrease.

[0014] Further, the blasting tube includes a partition wall, the partition wall is used to separate the liquid oxygen chamber and the liquid oxygen-fuel mixture chamber from each other, the two ends of the partition wall along the axial direction are arranged in a pointed cone shape, and the thickness of the partition wall is 10-20 times the thickness of the peripheral wall of the liquid oxygen chamber on the blasting tube;

[0015] And / or, the thickness of the lower bottom wall of the blasting tube gradually decreases along the center, and the ignition assembly is located at the center of the lower bottom wall of the blasting tube.

[0016] Furthermore, the communicating holes are opened on the partition wall and are evenly arranged in a plurality along the circumference of the blasting tube. The plurality of communicating holes are arranged in an outward divergent shape along the direction of the liquid oxygen chamber toward the liquid oxygen-fuel mixture chamber, and the communicating holes are arranged in a constricted shape at one end close to the liquid oxygen chamber.

[0017] Furthermore, the partition wall is located at a bottom wall position on one side of the liquid oxygen chamber and is fixedly provided with a drainage shell in the axial direction, the inner wall of the drainage shell is fixedly provided with a spiral blade, and the plurality of communicating holes are located in the drainage shell at the constricted end close to the liquid oxygen chamber;

[0018] And / or, the partition wall is rotatably provided with a mixing blade at a bottom wall position on one side of the liquid oxygen chamber, and the rotation axis of the mixing blade coincides with the axis of the blasting tube.

[0019] Further, the sealing plate is rotatably arranged on the inner bottom wall of the liquid oxygen-fuel mixture chamber, and a plurality of switch holes are opened on the sealing plate, and the switch holes correspond to the connecting holes one by one. The driving assembly includes a push plate, a push rod and a push member, and the push plate is slidably arranged in the liquid oxygen-fuel mixture chamber. The push rod is fixedly connected to the push plate and passes through the outside of the blasting tube, and the push member is used to push the push plate to push the liquid oxygen-fuel mixture chamber into the liquid oxygen chamber, wherein,

[0020] A handle is fixedly provided at one end of the push rod extending out of the blasting tube, a retaining tube is provided between the handle and the blasting tube, the retaining tube is sleeved on the push rod, the retaining tube is divided into two halves and bonded to each other to form a whole, and a striking block is fixedly provided on both halves of the retaining tube;

[0021] At the same time, the sealing plate is fixedly provided with a plurality of limit rods along the circumferential direction, the push plate is provided with a limit hole corresponding to each limit rod, the limit rod is correspondingly slidably penetrated into the limit hole, and a positioning block is fixedly provided on the sealing plate, and a pair of blocking blocks are fixedly and spaced apart on the inner side wall of the liquid oxygen-fuel mixture chamber, and the positioning block is located between the pair of blocking blocks.

[0022] Furthermore, both ends of the two halves of the retaining tube in the axial direction are fixedly provided with convex parts, and the end surfaces of the blasting tube and the handle that abut against the two halves of the retaining tube are provided with concave parts, and the convex parts are snap-fitted with the concave parts.

[0023] Furthermore, the bottom of the blasting tube is arranged in a frustum shape and a plurality of positioning cones are fixedly arranged on the bottom wall.

[0024] In a second aspect, the embodiments of the present invention are implemented by the following technical solutions:

[0025] A method for using a liquid oxygen energy precision blasting device for high slope excavation roadbed, comprising the following steps:

[0026] S1: Use excavation machinery to dig holes for placing blasting tubes. The depth of the holes is between 2 and 5 meters. The specific depth is adjusted according to the specific requirements of the high slope project and geotechnical conditions;

[0027] S2: Filling the liquid oxygen chamber and the liquid oxygen fuel mixture chamber of the blasting tube with corresponding liquid oxygen and liquid oxygen fuel mixture in the factory area or safe area;

[0028] S3: safely transport the blasting tube to the construction site, start the driving assembly to open the connecting hole of the sealing plate, and allow the liquid oxygen-fuel mixture in the liquid oxygen-fuel mixture chamber to enter the liquid oxygen chamber for mixing;

[0029] S4: Put the blasting tube to the bottom of the hole, extend the detonating line of the ignition assembly to the safe area for detonation, and cover the blasting tube with a layer of sand or soil until it is completely covered, then pour quick-drying cement into the hole to completely cover the hole, and wait for the quick-drying cement to harden;

[0030] S5: Perform ignition blasting.

[0031] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0032] 1. The present invention achieves a more accurate directional blasting effect by optimizing the structure of the blasting tube. Specifically, the blasting tube is designed to be provided with a liquid oxygen chamber and a liquid oxygen-fuel mixture chamber from bottom to top, and the inner wall of the liquid oxygen chamber is provided with a plurality of cracks along the circumferential direction. The depth of these cracks gradually becomes shallower from the bottom to the top, ensuring that the impact force of the explosion is first released from the bottom of the blasting tube. In order to further control the blasting process, the ignition assembly is arranged below the liquid oxygen chamber, so that the explosion point starts from the bottom of the blasting tube, and the impact force is released from the bottom, which can minimize the impact of the explosion on the top area and avoid the generation of excessive dust.

[0033] At the same time, the peripheral wall of the blasting tube begins to rupture from the thinner position of the crack at the bottom, and the explosion shock wave expands to the surroundings, ensuring the directionality of the blasting and effectively avoiding unnecessary damage to the surrounding environment. In addition, in order to improve safety, the present invention drives the sealing plate to open the connecting hole through the driving component, and introduces the liquid oxygen fuel mixture into the liquid oxygen chamber when blasting is required. In this way, the liquid oxygen and fuel mixture can avoid premature contact, thereby preventing premature explosion, ensuring the safety and reliability of the entire blasting process.

[0034] 2. The present invention further optimizes the design of the blasting tube. By setting a rupture annular gap and connecting the rupture annular gap with all the rupture cracks, the impact force can be released more directly and efficiently from the bottom of the blasting tube. The setting of the rupture annular gap helps to guide the explosion shock wave to be released from the bottom, enhance the directional nature of the blasting effect, and avoid unnecessary damage to the upper area.

[0035] In addition, multiple welding points are set from bottom to top on each crack, and the intervals between these welding points gradually decrease. This design not only effectively improves the strength of the overall structure of the blasting tube, enabling it to withstand higher pressure and impact force, but also further promotes the efficiency of releasing the impact force from the bottom. The gradual reduction in the interval between welding points makes the crack more controllable, ensuring that the shock wave propagates along the predetermined path during blasting, thereby improving the accuracy and stability of blasting and further optimizing the blasting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 The overall structural diagram of the liquid oxygen energy precision blasting device for high slope excavation roadbed provided by the present invention;

[0038] Figure 2 The present invention is intended to show the internal structure of the blasting tube;

[0039] Figure 3 For the present invention Figure 2 Schematic diagram of the structure of part A;

[0040] Figure 4 For the present invention Figure 2 The structural diagram of part B;

[0041] Figure 5 The present invention is intended to show an exploded view of a drive assembly and a retaining cylinder;

[0042] Icons: 1-blasting tube, 11-liquid oxygen chamber, 12-liquid oxygen fuel mixture chamber, 121-blocking block, 13-gas nozzle, 14-breaking crack, 141-breaking ring seam, 142-welding point, 15-partition wall, 151-connecting hole, 16-positioning cone, 2-sealing plate, 21-switch hole, 22-limiting rod, 23-positioning block, 3-driving assembly, 31-push plate, 311-limiting hole, 32-push rod, 33-pushing member, 331-tension spring, 34-handle, 341-hexagonal groove, 342-recess, 4-ignition assembly, 41-spark plug, 5-drainage shell, 51-spiral blade, 52-shaft rod, 521-mixing blade, 522-bearing, 6-blocking tube, 61-knocking block, 62-convex part. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example

[0046] The following is further described in conjunction with specific embodiments. Figure 1-Figure 5 As shown, the present invention is a liquid oxygen energy precision blasting device for high-slope excavation roadbed, including a blasting tube 1. The blasting tube 1 is cylindrical as a whole, with a compact appearance design, and is suitable for the blasting needs of various high-slope projects. The bottom of the blasting tube 1 is arranged in a cone shape, and a plurality of positioning cones 16 are fixedly arranged on the bottom wall. These positioning cones 16 can effectively ensure the stability of the blasting tube 1 during installation and avoid displacement of the equipment due to vibration or external pressure during the blasting process. Especially in high-intensity blasting scenarios, the positioning cone 16 helps to ensure that the blasting tube 1 is fixed to the predetermined position through effective contact with the rock and soil layer, thereby improving the accuracy and safety of the overall blasting.

[0047] The blasting tube 1 is divided into a liquid oxygen chamber 11 and a liquid oxygen-fuel mixture chamber 12 from bottom to top. The liquid oxygen chamber 11 is used to store liquid oxygen, while the liquid oxygen-fuel mixture chamber 12 is used to store a liquid oxygen-fuel mixture. According to actual application requirements, the fuel in the liquid oxygen-fuel mixture chamber 12 is preferably liquid methane or natural gas. These flammable gases can react with liquid oxygen to generate powerful explosive energy and provide precise blasting effects when breaking rocks. The separation design of liquid oxygen and fuel mixture effectively avoids their early contact, thereby reducing the risk of accidental explosion.

[0048] The liquid oxygen chamber 11 and the liquid oxygen-fuel mixture chamber 12 are separated from each other. The blasting tube 1 is provided with gas nozzles 13 for filling the liquid oxygen chamber 11 and the liquid oxygen-fuel mixture chamber 12 with liquid oxygen and liquid oxygen-fuel mixture. The gas nozzle 13 is a one-way flow gas nozzle 13, which can effectively control the inflow direction and flow rate of the gas and prevent safety hazards caused by gas backflow.

[0049] The inner wall of the liquid oxygen chamber 11 is provided with a plurality of cracks 14 along the circumferential direction, and the design of these cracks 14 greatly improves the controllability of the blasting. The depth of the cracks 14 gradually becomes shallower from bottom to top along the blasting tube 1, so that the impact force of the explosion is released from the bottom of the blasting tube 1, ensuring that the impact force is evenly diffused from the bottom to the surroundings, thereby improving the blasting accuracy and reducing the impact on the surrounding environment. At the cracks 14, the energy of the blasting can be released from the bottom and gradually expand to the surroundings, reducing the impact force on the top area, thereby avoiding excessive splashing of dust and debris and improving construction safety.

[0050] Reference Figure 2 and Figure 3 As shown, the connecting hole 151 between the liquid oxygen chamber 11 and the liquid oxygen fuel mixture chamber 12 is designed so that when blasting is required, the connecting hole 151 can be opened by the driving assembly 3, and the liquid oxygen fuel mixture enters the liquid oxygen chamber 11. This design can effectively avoid the premature mixing of liquid oxygen and liquid oxygen fuel mixture, ensure that the mixture reacts only when blasting, and greatly improve the safety of the blasting process.

[0051] In this embodiment, the ignition assembly 4 is arranged below the liquid oxygen chamber 11 to ensure that the blasting process can release the impact force from the bottom. The ignition assembly 4 adopts an electric ignition form, which is remotely controlled by a spark plug 41 and wires, and has high safety and controllability. Compared with the traditional mechanical ignition method, the electric ignition method can more accurately control the ignition timing and reduce the risk of human operation.

[0052] As the core component of the ignition assembly 4, the spark plug 41 can generate a high-temperature arc to initiate a combustion reaction after the liquid oxygen and liquid oxygen fuel mixture reaches an appropriate mixing ratio, thereby ensuring the reliability and stability of the explosion. The wires are connected to the remote control system, and the construction workers can operate in a safe area away from the blasting area, further improving the safety of the operation process.

[0053] Reference Figure 2 As shown, in this embodiment, a rupture annular slit 141 is provided circumferentially below the liquid oxygen chamber 11 and at the position of the rupture cracks 14, and the rupture annular slit 141 is connected to all the rupture cracks 14. Through this design, the pressure release path in the liquid oxygen chamber 11 is clearer, ensuring that the impact force is released from the bottom of the blasting tube 1 during the explosion. The provision of the rupture annular slit 141 makes the rupture of the liquid oxygen chamber 11 more uniform, and the impact force can be gradually diffused to the surroundings along a predetermined path, thereby minimizing the shock wave to the top area, reducing dust flying and damage to the surrounding environment.

[0054] When the liquid oxygen in the liquid oxygen chamber 11 reacts with the liquid oxygen fuel mixture, the shock wave is first released from the bottom along the rupture annular seam 141, which can effectively guide the release direction of the blasting energy, ensure that the blasting is gradually carried out from bottom to top, avoid excessive reverse impact, and improve the accuracy and safety of the blasting effect. The connection between the rupture annular seam 141 and all the rupture cracks 14 makes the rupture mode of the liquid oxygen chamber 11 more consistent, further ensures the uniform release of the blasting energy, and helps to enhance the controllability and efficiency of the blasting.

[0055] As an optional embodiment, a rupture annular seam 141 is provided in the middle of the liquid oxygen chamber 11 and at the position of the rupture cracks 14 along the circumferential direction. The rupture annular seam 141 is connected to all the rupture cracks 14. This arrangement can produce a more balanced pressure distribution during the blasting process, ensure that the explosion energy is gradually released from the middle of the blasting tube 1, and effectively reduce the risks that may be caused by uneven blasting. Through this structural design, the shock wave of the blasting can start to expand more accurately along the middle of the liquid oxygen chamber 11, reduce the non-directional impact on the surrounding area during the explosion, and further enhance the safety and environmental protection of the blasting.

[0056] Reference Figure 2 and Figure 3 As shown, each fracture crack 14 is provided with a plurality of welding points 142 from bottom to top, and the intervals between the plurality of welding points 142 along the fracture crack 14 from bottom to top gradually decrease. This design can effectively control the formation and expansion process of the fracture crack 14, making the blasting process more controllable and precise.

[0057] Specifically, the setting of the welding points 142 plays a role in enhancing the strength of the rupture crack 14, ensuring that the pressure on the blasting tube 1 during the blasting process can be evenly distributed according to the design requirements. During the explosion process, the welding points 142 not only serve as structural support, but also promote the gradual opening of the rupture crack 14 according to the predetermined path and sequence. By designing the welding points 142 with gradually decreasing intervals, the expansion of the rupture crack 14 can be gradually intensified, and the release process from the bottom to the top is smoother, avoiding unnecessary damage caused by premature or excessive release of energy.

[0058] As the intervals between the welds 142 gradually decrease, the expansion of the crack 14 from the bottom to the top will be more detailed and orderly, ensuring that the shock wave can be released more accurately from the bottom and gradually expand to the surroundings. The control design of the welds 142 can effectively prevent the shock wave from propagating to the upper part too early, thereby reducing the impact force in the upper area, effectively reducing the splashing of dust and debris, and reducing environmental pollution during blasting.

[0059] Reference Figure 2 As shown, the blasting tube 1 includes a partition wall 15, which is used to separate the liquid oxygen chamber 11 and the liquid oxygen-fuel mixture chamber 12 from each other. Both ends of the partition wall 15 along the axial direction are arranged in a pointed cone shape. This design not only helps to effectively isolate the liquid oxygen and the liquid oxygen-fuel mixture, but also provides a more stable energy release path during blasting;

[0060] At the same time, the thickness of the partition wall 15 is 10-20 times the thickness of the peripheral wall of the liquid oxygen chamber 11 on the blasting tube 1. Through this thickness design, the partition wall 15 can withstand greater internal pressure during the blasting process, provide stronger support force, and ensure the stability of the liquid oxygen chamber 11 and the liquid oxygen fuel mixture chamber 12 during the entire blasting process. In addition, the thicker partition wall 15 can effectively resist the high pressure generated in the liquid oxygen chamber 11, preventing the partition wall 15 from rupturing or failing due to excessive pressure.

[0061] As an optional embodiment, the thickness of the lower bottom wall of the blasting tube 1 gradually decreases along the center, and the ignition assembly 4 is located at the center of the lower bottom wall of the blasting tube 1. This design not only enhances the structural stability of the blasting tube 1, but also optimizes the release method of the blasting energy. The thicker bottom wall structure can better withstand the initial impact force generated by the explosion, while the thin-walled area can more easily break and guide the shock wave to propagate in a predetermined direction, thereby ensuring that the shock wave is released evenly starting from the bottom.

[0062] Reference Figure 2 and Figure 3 As shown, the connecting hole 151 is opened on the partition wall 15 and is evenly arranged along the circumference of the blasting tube 1. The multiple connecting holes 151 are arranged in a divergent shape outward from the liquid oxygen chamber 11 toward the liquid oxygen fuel mixture chamber 12. The connecting hole 151 is arranged in a constricted shape at one end close to the liquid oxygen chamber 11. This design helps to control the flow rate of the liquid oxygen and fuel mixture, ensure the stability of the mixing ratio of the two, avoid excessive liquid oxygen or premature contact with fuel, and further improve the safety of the blasting. The constricted design can make the liquid oxygen enter the liquid oxygen fuel mixture chamber 12 more slowly and stably, avoid the impact caused by the excessive flow of liquid oxygen, and ensure the smooth progress of the blasting process.

[0063] Reference Figure 2 and Figure 3 As shown, the partition wall 15 is located at the bottom wall position of one side of the liquid oxygen chamber 11, and a drainage shell 5 is fixedly welded in the axial direction. The drainage shell 5 is annular, and a spiral blade 51 is fixedly welded on the inner wall of the drainage shell 5. A plurality of connecting holes 151 are located in the drainage shell 5 near the constricted end of the liquid oxygen chamber 11 to facilitate mixing of liquid oxygen and the liquid oxygen fuel mixture and improve mixing efficiency.

[0064] As an optional embodiment, the partition wall 15 is located at the bottom wall of one side of the liquid oxygen chamber 11 and is rotatably provided with a mixing blade 521. The rotation axis of the mixing blade 521 coincides with the axis of the blasting tube 1. Specifically, the mixing blade 521 is provided with multiple pieces and is fixedly arranged on the shaft rod 52 along the circumferential direction. The shaft rod 52 is coaxially rotatably installed at the top position of the liquid oxygen chamber 11 through a bearing 522, thereby further improving the mixing efficiency.

[0065] Reference Figure 2and Figure 4 As shown, the sealing plate 2 is rotatably arranged on the inner bottom wall of the liquid oxygen-fuel mixture chamber 12, and a plurality of switch holes 21 are opened on the sealing plate 2, and the switch holes 21 correspond to the connecting holes 151 one by one. The driving assembly 3 includes a push plate 31, a push rod 32 and a push member 33. The push plate 31 is slidably arranged in the liquid oxygen-fuel mixture chamber 12, the push rod 32 is fixedly connected to the push plate 31 and penetrates out of the blasting tube 1, and the push member 33 is used to push the push plate 31 to push the liquid oxygen-fuel mixture chamber 12 into the liquid oxygen chamber 11. In the present embodiment, the pushing member 33 uses a tension spring 331 to pull the push plate 31 to move closer to the liquid oxygen chamber 11. When selecting the tension of the tension spring 331, it is necessary to select a tension spring 331 with a tension sufficient to pull the push plate 31 to push the liquid oxygen-fuel mixture into the liquid oxygen chamber 11. In other embodiments, the tension spring 331 can be replaced with an electric push rod. The end of the push rod 32 extending outside the blasting tube 1 is fixedly welded with a handle 34, and the top of the handle 34 is provided with a hexagonal groove 341 to facilitate the turning of the wrench.

[0066] Reference Figure 2 and Figure 5 As shown, a retaining tube 6 is arranged between the handle 34 and the blasting tube 1, and the retaining tube 6 is sleeved on the push rod 32. The retaining tube 6 is divided into two halves and is bonded to each other to form a whole. A knocking block 61 is fixedly arranged on the two halves of the retaining tube 6. The retaining tube 6 can limit the movement of the push rod 32 and the push plate 31. The knocking block 61 can easily knock the two halves of the retaining tube 6 apart to avoid pushing the liquid oxygen-fuel mixture chamber 12 into the liquid oxygen chamber 11 when not in use, thereby ensuring safety during transportation.

[0067] In order to facilitate the connection and alignment of the switch hole 21 of the sealing plate 2 with the connecting hole 151, four limiting rods 22 are uniformly fixed and welded on the top of the sealing plate 2 along the circumferential direction, and the push plate 31 is provided with four limiting holes 311 corresponding to each limiting rod 22. The limiting rods 22 are correspondingly slidably penetrated in the limiting holes 311, and a positioning block 23 is fixedly provided on the sealing plate 2, and a pair of blocking blocks 121 are fixedly and spaced apart on the inner side wall of the liquid oxygen-fuel mixture chamber 12, and the positioning block 23 is located between the pair of blocking blocks 121. In this way, when the handle 34 is turned to drive the push rod 32 and the push plate 31 to rotate, under the action of the limiting rod 22, the switch hole 21 on the sealing plate 2 can be driven from being offset from the connecting hole 151 to being connected with each other, wherein the blocking block 121 and the positioning block 23 can play a limiting role, so that the switch hole 21 on the sealing plate 2 can be just connected with the connecting hole 151 to avoid mutual dislocation during rotation.

[0068] Reference Figure 4 and Figure 5As shown, both ends of the two half retaining tubes 6 along the axial direction are fixedly provided with convex portions 62. In the present embodiment, the convex portion 62 is hemispherical. The end surfaces of the blasting tube 1 and the handle 34 that abut against the two half retaining tubes 6 are provided with concave portions 342. The convex portion 62 is snap-fitted with the concave portion 342. The mutual cooperation between the convex portion 62 and the concave portion 342 can prevent the handle 34 from being accidentally touched and rotated. Only when the two half retaining tubes 6 are knocked open under the action of external force can the handle 34 be rotated and a protective effect is played.

[0069] In addition, the embodiments of the present invention are implemented by the following technical solutions:

[0070] A method for using a liquid oxygen energy precision blasting device for high slope excavation roadbed, comprising the following steps:

[0071] S1: using an excavator to dig a hole for placing the blasting tube 1, the hole depth is between 2 and 5 meters, and the specific depth is adjusted according to the specific requirements of the high slope project and the geotechnical conditions;

[0072] S2: Filling the liquid oxygen chamber 11 and the liquid oxygen-fuel mixture chamber 12 of the blasting tube 1 with corresponding liquid oxygen and liquid oxygen-fuel mixture in the factory area or the safe area;

[0073] S3: safely transport the blasting tube 1 to the construction site, start the driving assembly 3 to open the connecting hole 151 of the sealing plate 2, and allow the liquid oxygen-fuel mixture in the liquid oxygen-fuel mixture chamber 12 to enter the liquid oxygen chamber 11 for mixing;

[0074] S4: Put the blasting tube 1 to the bottom of the hole, follow the detonating line of the ignition assembly 4 to the detonation safety area, and cover the blasting tube 1 with a layer of sand or soil until it completely covers the blasting tube 1, then pour quick-drying cement into the hole to completely cover the hole, and wait for the quick-drying cement to harden;

[0075] S5: Perform ignition blasting.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid oxygen energy precision blasting device for high slope excavation roadbed, characterized in that: include: A blasting tube (1), wherein the blasting tube (1) is provided with a liquid oxygen chamber (11) and a liquid oxygen-fuel mixture chamber (12) from bottom to top, wherein the liquid oxygen chamber (11) and the liquid oxygen-fuel mixture chamber (12) are separated from each other, wherein the blasting tube (1) is provided with gas nozzles (13) for filling the liquid oxygen chamber (11) and the liquid oxygen-fuel mixture chamber (12) with liquid oxygen and liquid oxygen-fuel mixture respectively, wherein the inner peripheral wall of the liquid oxygen chamber (11) is provided with a plurality of cracks (14) along the circumferential direction, wherein the depth of the cracks (14) gradually becomes shallower along the direction from bottom to top of the blasting tube (1), and a connecting hole (151) is provided between the liquid oxygen chamber (11) and the liquid oxygen-fuel mixture chamber (12); A sealing plate (2), the sealing plate (2) being used to seal or open the communicating hole (151); a driving assembly (3), the driving assembly (3) being used to drive the sealing plate (2) to open the communicating hole (151), and at the same time being used to drive the liquid oxygen-fuel mixture in the liquid oxygen-fuel mixture chamber (12) to enter the liquid oxygen chamber (11); An ignition assembly (4), wherein the ignition assembly (4) is arranged below the liquid oxygen chamber (11).

2. The high slope excavation roadbed liquid oxygen energy precision blasting device according to claim 1 is characterized by: A rupture annular slit (141) is provided below the liquid oxygen chamber (11) and at the position of the rupture slit (14) along the circumferential direction, and the rupture annular slit (141) is connected to all the rupture slits (14); And / or, a rupture annular seam (141) is circumferentially arranged in the middle of the liquid oxygen chamber (11) and located at the position of the rupture seams (14), and the rupture annular seam (141) is connected to all the rupture seams (14).

3. The high slope excavation roadbed liquid oxygen energy precision blasting device according to claim 2 is characterized by: Each of the fracture cracks (14) is provided with a plurality of welding points (142) from bottom to top, and the intervals between the plurality of welding points (142) along the fracture crack (14) from bottom to top gradually decrease.

4. The high slope excavation roadbed liquid oxygen energy precision blasting device according to claim 3 is characterized by: The blasting tube (1) comprises a partition wall (15), the partition wall (15) is used to separate the liquid oxygen chamber (11) and the liquid oxygen fuel mixture chamber (12) from each other, the two ends of the partition wall (15) along the axial direction are arranged in a pointed cone shape, and the thickness of the partition wall (15) is 10-20 times the thickness of the peripheral wall of the liquid oxygen chamber (11) on the blasting tube (1); And / or, the thickness of the lower bottom wall of the blasting tube (1) gradually decreases along the center, and the ignition assembly (4) is located at the center of the lower bottom wall of the blasting tube (1).

5. The high slope excavation roadbed liquid oxygen energy precision blasting device according to claim 4 is characterized in that: The communicating holes (151) are opened on the partition wall (15) and are evenly arranged in a plurality along the circumference of the blasting tube (1). The plurality of communicating holes (151) are arranged in an outwardly divergent shape in a direction from the liquid oxygen chamber (11) toward the liquid oxygen-fuel mixture chamber (12), and one end of the communicating holes (151) close to the liquid oxygen chamber (11) is arranged in a constricted shape.

6. The high slope excavation roadbed liquid oxygen energy precision blasting device according to claim 5 is characterized by: The partition wall (15) is located at a bottom wall position on one side of the liquid oxygen chamber (11), and a drainage shell (5) is fixedly arranged in the axial direction; a spiral blade (51) is fixedly arranged on the inner wall of the drainage shell (5); and a plurality of the communication holes (151) are located in the drainage shell (5) near the constricted end of the liquid oxygen chamber (11); And / or, the partition wall (15) is rotatably provided with a mixing blade (521) at a bottom wall position on one side of the liquid oxygen chamber (11), and the rotation axis of the mixing blade (521) coincides with the axis of the blasting tube (1).

7. The high slope excavation roadbed liquid oxygen energy precision blasting device according to claim 6 is characterized by: The sealing plate (2) is rotatably arranged on the inner bottom wall of the liquid oxygen-fuel mixture chamber (12); a plurality of switch holes (21) are opened on the sealing plate (2); the switch holes (21) correspond to the connecting holes (151) one by one; the driving assembly (3) comprises a push plate (31), a push rod (32) and a push member (33); the push plate (31) is slidably arranged in the liquid oxygen-fuel mixture chamber (12); the push rod (32) is fixedly connected to the push plate (31) and is passed through the outside of the blasting tube (1); the push member (33) is used to push the push plate (31) to push the liquid oxygen-fuel mixture chamber (12) into the liquid oxygen chamber (11); wherein, A handle (34) is fixedly provided at one end of the push rod (32) extending outside the blasting tube (1), a retaining tube (6) is provided between the handle (34) and the blasting tube (1), the retaining tube (6) is sleeved on the push rod (32), the retaining tube (6) is divided into two halves and bonded to each other to form a whole, and a striking block (61) is fixedly provided on both halves of the retaining tube (6); At the same time, the sealing plate (2) is fixedly provided with a plurality of limiting rods (22) along the circumferential direction, the push plate (31) is provided with a limiting hole (311) corresponding to each limiting rod (22), the limiting rod (22) is correspondingly slidably penetrated in the limiting hole (311), and a positioning block (23) is fixedly provided on the sealing plate (2), and a pair of blocking blocks (121) are fixedly provided on the inner side wall of the liquid oxygen fuel mixture chamber (12) and spaced apart, and the positioning block (23) is located between the pair of blocking blocks (121).

8. The high slope excavation roadbed liquid oxygen energy precision blasting device according to claim 7 is characterized by: Both ends of the two halves of the retaining tube (6) in the axial direction are fixedly provided with convex parts (62), and the end surfaces of the blasting tube (1) and the handle (34) abutting against the two halves of the retaining tube (6) are provided with concave parts (342), and the convex parts (62) are snap-fitted with the concave parts (342).

9. The high slope excavation roadbed liquid oxygen energy precision blasting device according to claim 8, characterized in that: The bottom of the blasting tube (1) is arranged in a frustum shape, and a plurality of positioning cones (16) are fixedly arranged on the bottom wall.

10. A method for using the liquid oxygen energy precision blasting device for high slope excavation roadbed as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: using an excavator to dig a hole for placing the blasting tube (1), the hole depth being between 2 and 5 meters, and the specific depth being adjusted according to the specific requirements of the high slope project and the geotechnical conditions; S2: filling the liquid oxygen chamber (11) and the liquid oxygen fuel mixture chamber (12) of the blasting tube (1) with corresponding liquid oxygen and liquid oxygen fuel mixture in the factory area or the safe area; S3: safely transporting the blasting tube (1) to the construction site, starting the driving assembly (3) to open the connecting hole (151) of the sealing plate (2), and allowing the liquid oxygen-fuel mixture in the liquid oxygen-fuel mixture chamber (12) to enter the liquid oxygen chamber (11) for mixing; S4: insert the blasting tube (1) to the bottom of the hole, extend the detonating line of the ignition assembly (4) to the safe area for detonation, and cover the blasting tube (1) with a layer of sand or soil until the blasting tube (1) is completely covered, and then pour quick-drying cement into the hole to completely cover the hole, and wait for the quick-drying cement to harden; S5: Perform ignition blasting.

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