46 results about "Underwater blast" patented technology

The invention discloses a digital twinning-AI prediction driven cofferdam directional micro-blasting system, which relates to the technical field of underwater blasting engineering, and comprises the following steps of: constructing multi-domain digital twinning, reading a compliance rule machine by a loading machine, fusing a hydrophone array, shore-based vibration and distributed optical fiber observation assimilation to form a baseline field; defining an isobaric surface leakage volume, a sector deflection angle, a closure degree and a frequency band energy ratio, and establishing two sets of equivalent boundary admittances and preselection of a switchable physical layer; training a multi-output AI element model, combining opportunity constraint and hard constraint, performing linkage optimization on a physical layer and a detonation network, and generating a linkage instruction and a sensitivity atlas; and small-dose trial explosion is executed by a hierarchical correction state machine, and on-line guarding and knowledge writing-back are carried out in combination with sequential ratio test and quantile tracking. And minute-level interpretable prediction can be realized, leakage and direction drift are inhibited, the safety of an ecological structure is guaranteed, and the construction period and the cost are reduced.

The invention discloses a waterproof and pressure-resistant acceleration impact sensor, and relates to the technical field of impact detection, the waterproof and pressure-resistant acceleration impact sensor comprises a base, the bottom of the base is provided with a mounting screw groove, the top of the base is fixedly provided with a supporting stud, the outer ring of the supporting stud is sleeved with an inner protective shell in a threaded manner, and the inner protective shell is internally provided with a sensitive element. The device comprises an inner protective shell, the outer side of the inner protective shell is wrapped with an outer protective shell in a protective mode, a buffer reset mechanism is installed at the top of the outer protective shell, and an outer ring damping mechanism is installed in the buffer reset mechanism. The waterproof sealing performance, the impact resistance and pressure resistance and the signal transmission stability are remarkably improved, the problems that a traditional sensor is prone to leakage, signal distortion and connection looseness in extreme environments such as underwater explosion are effectively solved, and the sensor is suitable for complex application scenes such as wide temperature and high-frequency impact.

The application belongs to the technical field of numerical simulation. The application provides a research method for near-wall cavitation of underwater explosion based on secondary development of LS-DYNA. The disclosed embodiment can reproduce the dynamic processes of explosion-induced local negative pressure area, cavitation nucleus formation and collapse in LS-DYNA, and can make up for the problems that the traditional model cannot accurately process cavitation truncation and negative pressure non-convergence; LS-DYNA is used for driving modeling, parameter input, cavitation model embedding, solution submission and result extraction, so that the simulation whole process automation is realized, the manual operation amount is greatly reduced, and the calculation efficiency and reliability are improved; the automatic batch processing of multiple working conditions is supported, the influence of factors such as explosion source distance, water depth, static water pressure, explosive equivalent and wall surface material on cavitation behavior can be systematically studied, and good expansibility is obtained; and the key data such as cavitation area pressure and wall surface structure response can be automatically extracted, so that scientific basis is provided for analyzing the wall surface strengthening impact caused by cavitation collapse.

The application provides an anti-explosion underwater soft robot, and belongs to the field of robots.The problem that high transient energy of underwater explosion easily causes damage to internal components and circuits is solved.The anti-explosion underwater soft robot comprises a flexible circuit layer, a plurality of circuit modules are arranged on the flexible circuit layer, and the circuit modules are flexibly connected; a non-Newtonian fluid buffer layer is wrapped outside the flexible circuit layer; an elastic buffer layer is wrapped outside the non-Newtonian fluid buffer layer; and a driving unit is connected with the elastic buffer layer and used for driving the robot to move.The anti-explosion underwater soft robot is mainly used for underwater safety detection and underwater resource exploration.

The utility model relates to an underwater anti-blasting-impact pier pile protection device, and belongs to the technical field of bridge structure protection.The pier pile protection device comprises a baffle and a plurality of supporting rods, a bearing platform and a pier pile are arranged in the baffle, the supporting rods are arranged between the baffle and the bearing platform, and the two ends of each supporting rod are connected to the bearing platform and the baffle correspondingly; the baffle is of a cylindrical structure and is formed by sequentially bonding a polyurea coating, a first layer of steel plate, an anti-impact tile, gradient foamed aluminum, a stainless steel honeycomb plate layer and a second layer of steel plate from outside to inside. According to the pier pile protection device with the underwater blasting impact resisting effect, when water flow is resisted, the circular structures of the baffles can reduce the stress concentration phenomenon, the borne force can be evenly transmitted to all positions of the inner bearing platform, meanwhile, the streamline cylinders can effectively reduce the resistance of the water flow and wind power, and the service life of the pier pile protection device is prolonged. A porous elastic structure is arranged in the baffle, so that the influence of blasting vibration on the pier can be reduced.

The utility model relates to a fixing device for an underwater explosion impact resistance test of an electronic detonator, which comprises a fixing disc, a screw hole is arranged on the fixing disc, and a first bolt is arranged in the screw hole; at least one sliding groove is formed in the fixed disc; a second bolt is installed in any sliding groove, and the second bolt can slide along the sliding groove so as to change the distance between the second bolt and the first bolt. The second bolt is matched and fixed with the locking nut; a first through hole and a second through hole are respectively formed in the first bolt and the second bolt; the top of the primer detonator can be inserted into and abut against the first through hole, and a lead of the primer detonator can penetrate out of the upper end of the first through hole. The top of the to-be-tested detonator can be inserted into and abutted against the second through hole, and a lead of the to-be-tested detonator can penetrate out of the upper end of the second through hole; according to the utility model, the distance between the to-be-tested detonator and the primer detonator can be continuously adjusted, so that the distance setting is not limited by the hole site any more; and the height of the primer detonator can be adjusted, so that the blasting center of the primer detonator and key components of the to-be-tested detonator are positioned on the same horizontal plane, and test errors are avoided.

The invention discloses a surface tension coordinated regulation and control high-strength dense net underwater explosion jet flow suppression protection device and a use method. A selective permeable barrier is constructed through a high-strength dense net, surface tension of an interface is used for cooperatively and selectively permeating a water phase, blocking a gas phase from passing, breaking symmetrical expansion of bubbles and inducing energy to be dissipated in a capillary wave form, and the surface tension and multi-layer array configuration are adjusted by combining real-time adjustment of mesh tension and a dense net structure; the formation of high-speed jet flow is inhibited; and collapse energy is dispersed. The limitation that traditional protection only weakens shock waves is broken through, double inhibition of bubble pulsation and jet flow can be achieved, and the device has the advantages of light weight and modular deployment and has important popularization value in military and engineering scenes such as submarines and underwater facilities.

The invention discloses a multiphase fluid compressible and weak compressible mode mutual conversion numerical simulation method, and relates to the technical field of underwater explosion bubble full-time-history simulation, the method adopts a compressible Euler equation to carry out numerical simulation at the initial stage of underwater explosion, i.e., the initial stage of condensed phase charge detonation and bubble expansion; at the later stage of bubble expansion, converting a compressible Euler equation into a weak compressible hypothesis method for processing by judging whether the density change of a fluid grid unit exceeds a set threshold value or not; and in the bubble shrinkage stage, the compressible Euler equation is adopted again for numerical simulation, and underwater explosion bubble full-time-history numerical simulation is achieved. A volume fraction method is adopted in the equation solving process, the MUSCL reconstruction format and the HLLC numerical flux calculation format are coupled, and the prediction precision, stability and robustness of the overall numerical calculation method are improved.

The present invention discloses a method for predicting the dynamic response of a plate frame structure under underwater explosion load based on a convolutional neural network, which belongs to the technology of ship damage under underwater explosion load. The method first uses CEL to perform numerical simulation on the dynamic response of the plate frame structure under underwater explosion load to obtain data samples; generates different explosive equivalent-damage picture sets according to the damage caused to the plate frame by different equivalent explosives; performs dimensionality reduction processing on the aforementioned data samples according to the symmetrical structure of the plate frame; binds the reduced-dimensional data to the picture set; executes a convolutional neural network training program, uses the reduced-dimensional data and the picture set to train and obtain training results; executes a neural network training program, trains the input explosive equivalent-damage picture and the displacement data of each node of the plate frame, so that the explosive equivalent-plate frame damage-displacement of each node of the plate frame form a fitting relationship to achieve the purpose of prediction. The present invention uses a coupled Euler-Lagrangian method (CEL) to perform numerical simulation to obtain a database, trains the convolutional neural network based on the numerical calculation results, and realizes the rapid prediction of the dynamic response of the plate frame structure under underwater explosion load.

The present invention provides an array-type underwater explosive cutting device based on a multi-degree-of-freedom design. The array-type underwater explosive cutting device is a regular polygonal ring structure, comprising: a plurality of array-type cutting units connected in a ring, each array-type cutting unit being provided with a support structure at the connection with the adjacent array-type cutting unit; a cavity structure being provided on the inner side of the outer shell structure, the outer shell structure and the cavity structure forming the outer shell of a shaped charge structure; buffer structures being provided on both sides of the shaped charge structure, the buffer structures being connected to the inner wall of the outer shell structure; a rotating structure and a sliding structure being provided on the outer wall of the outer shell structure, the rotating structure being rotatably connected to the shaped charge structure. The present invention achieves efficient cutting of targets with uneven thickness or dispersed structure, and can also efficiently damage flexible structures such as submarine optical cables and electric cables, or submarine structural systems with multiple extension directions.

The embodiment of the invention discloses an underwater blasting monitoring method and device, electronic equipment and a computer readable medium. A specific implementation mode of the method comprises the steps that mobile drilling equipment is controlled to move into a water surface range corresponding to a target blasting position, and the mobile drilling equipment is controlled to conduct underwater drilling operation; controlling an image acquisition device to acquire an image of an acquisition range corresponding to the target blasting position to obtain a to-be-ranged image set; generating a target ranging information set according to the to-be-ranged image set and a target ranging model, and sending the target ranging information set to an early warning device; according to the target distance measurement information set, generating a safety early warning information set, and according to the safety early warning information set, sending early warning completion information to the monitoring terminal; and the blasting equipment is detected, a blasting equipment detection result is obtained, and the blasting equipment is controlled to execute blasting operation. According to the embodiment, the operation area of the underwater blasting project can be monitored, and the project safety is improved.

The invention provides a hull beam structure water explosion motion response test system and a test and analysis method thereof. The ship body beam structure water explosion motion response test system comprises a photographing device, a shutter control system of the photographing device has nanosecond-level time precision, and the number of photographed frames per second is not less than 10000; and the processing device is electrically connected with the photographing device, the processing device is used for adjusting photographing parameters of the photographing device, and the processing device has video interception, storage and format conversion functions so as to clearly and uninterruptedly record the whole movement process of the measured object. According to the test system provided by the invention, the motion data of the hull beam structure under the action of underwater explosion is measured in real time by establishing the hull beam structure underwater explosion dynamic response test device based on high-speed photography, and the dynamic response data of the hull beam structure is analyzed in combination with a proposed hull beam structure dynamic response data analysis method; the dynamic process of motion of the hull beam structure is restored more accurately, so that data support is provided for evaluating the damage state of the hull beam structure.

The embodiment of the application discloses a numerical calculation method for underwater explosion bubble movement and related equipment, a grid area is generated, simulation is performed in combination with multiple preset parameters, an area fraction is accurately determined to determine an interface position, geometric method is used to calculate a phase volume fraction flux and iterative simulation is performed, so that the maximum radius of the first pulsation of the bubble in the underwater explosion process and the first pulsation period are obtained, the whole process of the bubble movement can be finely simulated, and the maximum radius and the period of the first pulsation are accurately obtained.

The invention discloses an intelligent prediction method for underwater blasting seismic velocity and dominant frequency based on deep learning, and relates to the technical field of machine learning, and the method comprises the steps: obtaining the multi-source data of a plurality of historical underwater blasting modes, verifying the multi-source factor feature vector contribution degree of local seismic velocity-dominant frequency of the plurality of underwater blasting modes, and obtaining the multi-source factor feature vector contribution degree of the local seismic velocity-dominant frequency of the plurality of underwater blasting modes; generating a peak shock velocity-dominant frequency spatial distribution diagram of each underwater blasting mode; according to the sensitive frequency range of the protection target type for the underwater blasting shock velocity-dominant frequency, evaluating the tolerable capacity vector of the protection target type of the to-be-blasted area; and an underwater blasting vibration velocity-dominant frequency prediction model is established, the multi-source data of the to-be-blasted area and the tolerable capacity vector of the protection target type of the to-be-blasted area serve as input, and an optimal underwater blasting mode meeting the protection target type of the to-be-blasted area is generated. The underwater blasting vibration velocity and the dominant frequency are accurately predicted, and the blasting mode decision-making benefit of the to-be-blasted area is maximized on the premise that safety is guaranteed.

The invention discloses a preparation method of multi-fiber and rubber powder composite reinforced underwater anti-explosion concrete, and belongs to the technical field of building materials. The concrete is prepared from the following components in parts by weight: 15 to 25 parts of cement, 20 to 30 parts of mineral admixture, 50 to 65 parts of sand, 80 to 100 parts of stone, 15 to 20 parts of water, 0.8 to 1.5 parts of water reducing agent, 3 to 5 parts of steel fiber with specific specification, 0.1 to 0.3 part of polypropylene fiber with specific specification and 4 to 8 parts of rubber powder with specific specification. During preparation, firstly, the cement, the mineral admixture, the sand and the stones are subjected to dry mixing, then the water and the water reducing agent which are mixed in advance are added for wet mixing, then the steel fibers, the polypropylene fibers and the rubber powder are sequentially added for stirring, and finally, pouring, vibrating and standard curing are performed to obtain the concrete. Through multi-fiber composite toughening and rubber powder energy absorption characteristics, the concrete structure is optimized in combination with the large-mixing-amount mineral admixture, the anti-knock performance of the concrete in the underwater high-pressure environment is remarkably improved, and the concrete has the advantages of excellent mechanical properties, excellent durability, simple and convenient preparation process, environmental protection and controllable cost.

The invention discloses a precise positioning and depth control method for underwater drilling blasting, relates to the technical field of underwater blasting, and aims to effectively control blast hole positioning deviation through data real-time linkage calibration, collect water level data through double-source cooperation of an automatic moisture indicator and a water level pressure sensor, eliminate interference and ensure data precision. An intelligent ultra-deep value decision-making model based on machine learning is constructed, historical engineering data and current actual measurement parameters are combined, an optimal ultra-deep value is automatically output, and in the trial explosion optimization stage, an optimal parameter combination is formed by monitoring the vibration speed and observing the explosion effect and optimizing the explosion parameters; a layered charging structure and a hole-by-hole delay detonating network are adopted, the maximum single-section detonating explosive amount is hierarchically controlled according to the distance of a protected object, vibration and shock wave data are continuously monitored in the blasting process, and parameters are adjusted immediately when the data exceed the standard; and the data is fed back to the intelligent model to complete iterative optimization, so that more accurate parameter support is provided for subsequent blasting.

The application discloses an underwater explosion autonomous acquisition system for a concrete structure, which comprises a test pier body, a sensor group and a data acquisition device; a concrete base block is arranged at the middle part of the concrete structure; the sensor group comprises stress sensors, strain sensors, wall surface reflection pressure sensors and free field pressure sensors; and the data acquisition device is arranged in a sealed box which is embedded into the soil layer of the water bottom; the acquisition system is used for acquiring explosive explosion information, and is favorable for test personnel to acquire accurate test data and to make a blasting plan.

The invention discloses a PD-SPH simulation method and system for underwater explosion naval vessel damage assessment, and the method comprises the steps: dividing a naval vessel structure into plates, ribs, reinforced keels and other parts according to the naval vessel structure design, carrying out the in-plane particle discretization of each part, and then carrying out the translation in the thickness direction; all the components are spliced to obtain an integral structure, and under the condition that the particle distances in the thickness direction are kept consistent, the in-plane particle distances at the joints of the plates, the ribs and the reinforced keels are increased; endowing each component in the naval vessel structure with a material parameter; the method comprises the following steps: setting draft depth, endowing SPH particles with water surface height, and setting initial pressure distribution; setting the quantity of explosives, the position of a detonating point and detonating time according to actual working conditions; coupling modes among several materials are set; respectively calculating motion equations of the SPH explosive particles, the SPH water particles and the PD solid particles; and recording the damage condition of the naval vessel structure.

This application discloses a method for underwater explosion multiphase flow prediction based on level-set function, which relates to the field of explosion numerical simulation. The method uses an interface distance function to capture the two-phase flow interface and determine the fluid coverage domain. Then, the third-order TVD-Runge-Kutta method is used to solve the Euler governing equation within the fluid coverage area to predict the multiphase flow. The updated formula of the interface distance function is given. The time discretization of the interface distance function and the time discretization of the Euler governing equation adopt different strategies. It can improve the overall solution calculation efficiency on the basis of achieving good prediction accuracy, thereby having good performance in prediction accuracy, precision, efficiency and stability. It can provide solid theoretical support for in-depth research on underwater explosion dynamics. The method can be easily extended to the precise capture and simulation of complex interface topological motion processes, thus providing an excellent solution for engineering applications.

The invention discloses a precise explosive distribution device for a cabin model multi-cartridge underwater explosion test, relates to the technical field of underwater explosion tests, and solves the problem of high-precision distribution of underwater multi-cartridges. The device comprises two medicine distribution structures which are symmetrically arranged on the two sides of a model; a first positioning base and a second positioning base of the medicine distribution structure are arranged on the model; a winder is arranged at the upper end of the first positioning base, and the lower end is hinged to the first telescopic rod; one end of the steel wire rope is accommodated in the winder, and the other end bypasses the fixed pulley on the second positioning base and is connected with the first telescopic rod; the movable end of the first telescopic rod is hinged to a second telescopic rod, and the second telescopic rod is driven by a rotating rod and a sliding positioning fixed seat; a medicine distribution line is arranged between the telescopic rods of the two medicine distribution structures, and a medicine bag is arranged on the medicine distribution line. According to the invention, the cartridge bags are accurately arranged at preset positions through the two telescopic rod structures, and the position relationship between the cartridge bags and the position relationship between the cartridge bags and the model are flexibly adjusted according to test requirements.

The application discloses a mapping method for evaluating human body impact damage degree based on animal injury condition equivalence, and belongs to the technical field of impact damage biomechanics, and comprises the following steps: constructing a whole-body high-fidelity biomechanical model of different species, applying underwater explosion vibration impact loads with different intensities to the model to obtain damage modes; statistically classifying the damage modes, integrating the damage modes to form a damage database, quantitatively calculating the damage in the damage database by using a new damage severity scoring system, selecting multiple physical factors affecting the biological damage degree, screening out two key physical quantities with the highest contribution rate to define scaling coefficients, and drawing a mapping atlas for evaluating the human body impact damage degree based on animal injury condition equivalence; the mapping atlas of the injury condition across species is established by constructing the multi-species biomechanical model and combining principal component analysis, and the accurate evaluation from animal experimental data to the human body damage degree under the underwater explosion vibration impact environment is systematically realized.

The application provides a controllable underwater explosion ice-breaking bomb, and belongs to the technical field of ocean and inland ice-breaking. The application solves the problems that the existing ice-breaking device cannot independently complete the ice-breaking task and the operation stability is difficult to guarantee. The controllable underwater explosion ice-breaking bomb comprises a shell, a composite cable, a pay-off device, a control module, floating material and an operation part. The bottom of the shell is provided with an opening. A rack is arranged on the outer side wall of the shell. The pay-off device, the control module, the floating material and the operation part are arranged in the shell. The pay-off device is arranged at the top of the inner cavity of the shell. The composite cable is arranged in the pay-off device. A first mounting plate is arranged below the pay-off device. The control module is arranged on the first mounting plate. The floating material is arranged at the bottom of the first mounting plate. A second mounting plate is arranged below the floating material. The operation part is arranged below the second mounting plate. A plurality of electromagnetic locks are arranged at the bottom of the second mounting plate. The controllable underwater explosion ice-breaking bomb is mainly used for ocean and inland ice-breaking.

The invention discloses a local reinforcement method for a hoisting structure of an underwater explosion test of a large-scale cabin model, and belongs to the field of underwater explosion tests. The method comprises the steps of 1, confirming the gravity center and the structure of a large-scale cabin model; 2, based on the gravity center and the structure confirmed in the step 1, local strengthening is conducted on the cabin section structure; 3, determining the mounting position of the eye plate of the large-scale cabin section model; 4, temporary reinforced installation of the large-scale cabin section model void cabin is conducted again; 5, the number of lifting points is selected, and the strength of the lifting eye plate is checked; and step 6, on the basis of checking in the step 5, effectively connecting the lifting appliance with the eye plate, and starting the crane to lift the large-scale cabin section model. According to the invention, the hoisting process of the large-size asymmetric model is ensured, and meanwhile, the structural strength requirement and the hoisting stability and safety of the cabin section are ensured.

The invention relates to the field of underwater sound signal processing, and discloses an underwater explosive sound signal interception method and device, and the method comprises the steps: determining a signal rough reading starting moment and a signal rough reading ending moment based on the reference starting moment of an explosive sound signal obtained through a bomb dropping moment recording table, a set error duration, and an explosive sound signal reference duration, reading data from the underwater explosive sound signal file; performing time-frequency transformation on the read data based on a first window function, and calculating signal energy of each first window; based on the signal energy maximum value, the ratio of the explosion starting window signal energy to the signal energy maximum value and a set first threshold value, the explosion sound signal starting moment is determined; and intercepting the underwater explosive sound signal based on the determined starting moment of the underwater explosive sound signal. According to the method, starting and ending time of the explosive sound signal is automatically searched through energy comparison based on an analysis design threshold value of a time-frequency energy spectrum, manpower and time cost is saved, intercepted signals are standardized, and noise interference is low.

The invention discloses a four-reflector single-camera double-view-angle high-speed imaging method under underwater explosion impact, and the method comprises the following specific steps: S1, independently packaging a high-speed camera in a waterproof cylinder which is cylindrical on the whole, and enabling an observation window of the waterproof cylinder to be circular transparent flat explosion-proof glass, the optical axis of the high-speed camera passes through the center of the observation window and is perpendicular to the observation window plane; s2, two inner side reflecting mirror groups are symmetrically placed right in front of the observation window, and two outer side reflecting mirror groups are symmetrically placed on the two sides of the inner side reflecting mirror groups; s3, adjusting the positions, sizes and inclination angles of the two outer side reflectors; judging whether the camera equivalent included angle and the system compactness of the adjusted measurement system meet design requirements or not, and if the design requirements are met, executing the step S4; and S4, recording the measured object on the left side and the right side of the imaging plane of the camera respectively, and segmenting the image into a left image and a right image along the vertical center line to complete underwater double-view imaging.

The present application provides a method and device for analyzing underwater blast noise, relating to the technical field of underwater noise analysis. The method comprises: obtaining multiple acoustic wave signals received at a monitoring point; analyzing the actual propagation time and actual signal strength of each acoustic wave signal; calculating the acoustic wave propagation speed at different depths in a preset water area based on a preset acoustic velocity profile model; performing predicted path analysis based on the acoustic wave propagation speed to obtain multiple predicted paths; performing propagation time matching and signal strength matching on the multiple predicted paths based on the actual propagation time and actual signal strength to determine a target predicted path; calculating the blast source position based on the target predicted path to obtain a predicted blast source position; and determining the target predicted path as the blast sound propagation path if the predicted blast source position is determined to be consistent with the preset blast source position. The present application can analyze the propagation path of underwater blast noise.

The invention discloses an electromagnetic ejection type impact testing machine and an impact testing method.The electromagnetic ejection type impact testing machine comprises an electromagnetic ejection impact device, an impact testing table, a buffer device, a reset device and a control system, an impact hammer is slidably connected to the electromagnetic ejection impact device, and an impact testing table base body is arranged on the impact testing table; a positive wave generator and a negative wave generator are arranged at the two ends of the impact test bed base body respectively, and the impact hammer, the positive wave generator, the impact test bed base body, the negative wave generator and the buffer device are sequentially and coaxially arranged along the central axis of the impact hammer; according to the testing machine, the electromagnetic force is utilized to generate the impact load through the electromagnetic ejection principle, the energy control precision is high, the complex impact test requirements of large energy loading, positive and negative double-wave impact and the like can be met, and simultaneous simulation of the first impact wave and subsequent water hammer or bubble pulsation in the actual underwater explosion process is achieved; and the impact fatigue damage accumulation and evolution process caused by multiple underwater explosions of weapons such as multiple torpedoes and torpedoes can be effectively reproduced.

The invention provides a research device for electric spark bubbles at any position in a long and narrow pipe, and relates to the field of underwater explosion. The water tank is arranged on the water tank support, the circular pipe support is arranged in the water tank, and fixing hoops are arranged at the two ends of the support and used for clamping the tail end of the circular pipe to achieve the supporting effect. And the connecting part of the two circular tubes is connected with the circular tube connecting piece through a flange and a discharging device. The discharging device extends into two holes in the two sides of the circular tube connecting piece and then makes contact with the two holes to generate bubbles, and the other ends of the two electrodes are externally connected with a control electric box. A light source and a high-speed camera are arranged on the two sides of the water tank support, and the water tank and the high-speed camera are arranged opposite to the water tank. The in-pipe electric spark bubble experiment device can achieve the purpose of generating multiple times of secondary cavitation in a long and narrow pipeline, is simple in structure, high in repeatability and obvious in experiment effect, meets more complex and fine experiment requirements, and can be used for carrying out experiments in common laboratories.

This application relates to the field of underwater environmental protection, and in particular to a method for underwater blasting environmental protection. It includes sequentially deploying a bubble curtain and an antifouling curtain around a predetermined blasting zone; placing a package containing a water treatment flocculant within the blasting zone or in the water immediately above it; linking the release trigger condition to the blasting operation; and implementing underwater blasting to trigger the release of the flocculant, allowing it to mix with suspended sediment. The bubble curtain weakens the shock wave and, in conjunction with the antifouling curtain, hinders sediment diffusion, while the flocculant promotes the settling of suspended solids. The application also describes the flocculant composition, packaging material and placement method, the formation and fixing method of the bubble curtain and antifouling curtain, their placement distance, and the steps of monitoring water turbidity and replenishing flocculant. This application achieves the technical effects of weakening underwater shock waves, hindering the diffusion of suspended sediment, accelerating the settling of fine suspended solids, and realizing rapid water purification after blasting.