81 results about "Underwater blast" patented technology

The invention discloses an underwater blasting construction method. The method includes the steps: reasonably designing and setting hold size d, hole distance a, hole row distance b, blast hole inclined angle alpha, drilling depth H and over-drilling depth h; reasonably designing single underwater blasting explosive consumption, explosive charge in per hole and a blasting network by the aid of layering blasting design. Compared with the prior art, according to the method, parameters are reasonably and efficiently designed in the blasting design process, blasting construction is implemented according to blasting design parameters, and foundation construction can be accelerated by the method.

The invention discloses an underwater shockwave field testing system which consists of a master control station and a plurality of testing stations. The test of an underwater shockwave field is completed in a mode of real-time acquisition and storage and post-wireless transmission; each testing station adopts a pressure sensor and an integrated dynamic overvoltage electron tester integrated by signal acquisition, processing, storage and wireless transmission modules and other circuit modules; the pressure sensor and the integrated dynamic overpressure electron tester are fixed on each testing point by positioning anchors and buoys; the master control station consists of a wireless transmission module, a computer, etc. Before the testing is carried out, parameter setting and performance detection are carried out to each testing station; after the testing is carried out, test data is transmitted; the testing system has the characteristics of real-time acquisition and record, post-transmission, repeatable triggering, repeated use, etc; and the testing system has small size, strong antijamming capability, high noise-signal ratio, simple arrangement and convenient use and is suitable for underwater shockwave field testing systems in various water areas.

The invention discloses a ship motion response prediction method considering a damping effect under an underwater explosion effect. The ship motion response prediction method comprises the steps: simplifying a ship into a uniform-section free hull beam; establishing a forced motion control equation of the hull beam considering the structural damping, and determining motion displacement functions of the inner beam in different pressure stages when the structural damping is considered according to the forced motion control equation; according to preset dimensionless damping ratio parameters andpressure distribution functions in the length direction of the hull beam at different pressure stages, determining a main coordinate function of hull beam motion deformation; calculating a motion displacement function of the hull beam in a corresponding pressure stage, and solving deformation parameters of the hull beam in different pressure stages according to the motion displacement function; determining a motion amplitude and a relative rotation angle of the hull beam in different motion deformation processes. According to the method, the ship plastic motion process is analyzed by considering the damping effect, engineering prediction of ship structure motion deformation under the underwater explosion effect can be accurately, easily and conveniently achieved, and prediction errors arereduced.

The invention discloses a multi-band measuring method for an actual ship underwater explosion strong impact environment. High bands over 20Hz are measured by an acceleration transducer additionally provided with a filter, and a shock spectrum base curve is obtained; medium bands between 5Hz and 20Hz are measured by an electrometric reed instrument; low bands below 5Hz are measured by a low-frequency vibrator; and obtained correction value points of the medium bands and the low bands are used for correcting the shock spectrum base curve, so that a shock spectrum correction curve is obtained finally. The method can be used for actual ship explosion test measurement of surface vessels and submarines, and also can be applied to underwater explosion test impact environment measurement of laboratory models; and moreover, by the correction method, impact environment data and safety and damage radiuses of vessel systems, equipment and personnel can be accurately and reliably obtained, and reliable test bases can be provided for formulating, supplementing and modifying shock resistance design of the vessels and for examining and testing relevant military standards.

The invention relates to a high-efficiency integral aerating device for sewage treatment, belonging to the field of sewage treatment aerating equipment. The device is composed of an air compressor, a compressed air delivery pipe system, a water-surface water-jump aeration mechanism, an underwater blast aeration mechanism and an underwater stirring mechanism, wherein the water-surface water-jump aeration mechanism is aeration rotary-axe wheel rows which are communicated by connecting compressed air delivery branch pipes in series, and the aeration rotary-axe wheel rows are communicated with the upper parts of air delivery main pipes through the air delivery branch pipes and are arranged on the surface of a water body; the underwater blast aeration mechanism is microporous aeration circular pipes, and the microporous aeration circular pipes are communicated with the compressed air delivery main pipes through microporous radial-connecting pipes and are arranged in the water body; the stirring mechanism is stirring wheel rows which are communicated by connecting the compressed air delivery branch pipes in series, and the stirring wheel rows are communicated with the air delivery main pipes through the air delivery branch pipes and are arranged between the aeration rotary-axe wheel rows and the microporous aeration circular pipe groups and between upper and lower microporous aeration circular pipe groups respectively. A set of compressed air power source is adopted, dissolved oxygen in the water body is integrally, efficiently, synchronously increased and is quickly and uniformly distributed, and the aeration efficiency and the energy utilization rate are significantly increased.

The invention discloses a cofferdam construction method with grooves milled through limited hole forming of a percussion drill combined with steel sheet piles. The cofferdam construction method is characterized in that a steel trestle platform and main bridge steel pile casings are used as supports, limited hole forming is performed through the percussion drill according to the plane position of a cofferdam, through two times of limited hole forming in staggered positions, milled grooves used for fixing the steel sheet piles are formed in a river bed with a rock face according to the plane position of the cofferdam, and the steel sheet piles are driven to be inserted in the milled grooves one by one to form the steel sheet cofferdam; the milled grooves are compactly filled with bagged clay on the outer side of the steel sheet pile cofferdam; finally, bottom sealing concrete is poured to the inner side of the steel sheet pile cofferdam for sealing the bottom and stopping water. According to the method, under the construction conditions of swift water flow, constructors do not need to block gaps between the cofferdam and the rock face of the river bed through underwater operation, potential safety hazards caused by the situation that the operators perform underwater blasting on river bed rock are avoided, and construction safety is improved.

The embodiment of the invention provides an underwater blasting safety measurement device and an underwater blasting safety measurement method, which relate to the field of underwater blasting projects. According to the device and the method of the invention, when a first propagation medium parameter, a second propagation medium parameter and a height difference factor are initialized, the height difference factor can be used for correcting the first propagation medium parameter and the second propagation medium parameter; when the actual to-be-measured mass point vibration velocity parameter is calculated according to the first propagation medium parameter, the second propagation medium parameter and the height difference factor after actual initialization, the actual charge weight parameter, the actual blast center distance parameter and the actual height difference parameter, errors between the actual to-be-measured mass point vibration velocity parameter obtained through calculation and the actual to-be-measured mass point vibration velocity parameter are greatly reduced, and when the actual to-be-measured mass point parameter obtained through calculation is compared with a standard safety vibration velocity parameter range, the outputted result information is more reliable and practical.

The invention belongs to the field of model tests, and relates to a comprehensive guarantee platform for an underwater explosion test of a submersible vehicle model. The comprehensive guarantee platform comprises a system used for suspending a submersible vehicle model, a system used for conveying the lifting hook of the submersible vehicle model, a tool box, a submarine model, a vibration reduction and impact resistance experiment table, watertight cabin doors and a telescopic long rod. A suspension cable moon pool is arranged in the center of the comprehensive guarantee platform, and a lifting lug and an unhooking device are arranged on the inner wall of the suspension cable moon pool; winches are fixed on one side of the moon pool and in the corresponding broadside through winch supporting plates, a rope is connected with the two winches from the outer side of the platform through the moon pool, and a plurality of hanging rings are arranged on the rope; and the telescopic long rod is arranged outside a board on the other side and located at the position of a water line, the tool box and the vibration reduction and impact resistance experiment table are arranged in the platform body, and the watertight cabin doors are arranged on the two sides of the platform body. A safety coefficient is high in the test process, underwater operation is not needed, the working conditions ofvarious explosion distances can be achieved, and it can be avoided that experimental instruments are damaged and data collection is affected in the test process.

The invention provides a high-voltage transient high-speed water jet generator and a curved surface boundary wall pressure load measuring device which at least comp-rises a watertight protective cylinder, a protective cylinder clamp, a truss mounting flat plate, a target plate mounting circular plate, a hemispherical target plate, a wall pressure sensor, a distance column, a jet flow circular pipemounting frame, a jet flow speed measuring pipe, a connecting pipe of the speed measuring pipe and the jet flow circular pipe, the jet flow circular pipe, a jet flow circular pipe bottom end sealingcover, a high-voltage electrode explosion source, an electrode mounting fixing pressing plate, a pressing plate bolt, an experiment support, a high-speed camera, an experiment water tank, a signal collector and a high-voltage control box. The jet flow speed measuring pipe is made of transparent acrylic materials, the positive electrode and the negative electrode of the jet flow round pipe bottom end sealing cover are made of copper pipes, and the other parts are made of aluminum alloy materials. The device is used for researching the length, speed and wall pressure load of the transient high-speed water jet and the wall pressure load characteristics of the near-field underwater explosion bubble jet, and has the main characteristics of simple structure and good experimental effect.

The invention discloses a polar region unmanned underwater icebreaking navigation system. After leaving a nuclear submarine underwater, the system performs self-propulsion through a tail rudder wing and a propeller, and an aircraft opens a fairing. A polar region unmanned underwater explosion icebreaking aircraft emits high-energy explosives through a main explosive emitting tube and a secondary explosive emitting tube, the high-energy explosives generate huge pressure on an ice layer, the ice layer is damaged, and icebreaking is achieved; a fixed drill bit of the drill bit icebreaking aircraft begins to rotate, an extension drill bit is opened during rotation and is fixed after extension, and the drill bit generates huge pressure in an ice layer contact area, so that an ice surface is damaged, and icebreaking is realized. The system is simple in structure, can be used as an ice breaking device, and provides a launching window for a nuclear submarine to launch missiles in polar regions. According to the polar region unmanned underwater icebreaking aircraft, an underwater ice drilling and underwater explosion icebreaking combined mode is adopted, the mixed icebreaking mode can be combined and optimized for icebreaking according to different ice layer environments, and in order to enhance the diameter capacity of an icebreaking window and improve the carrying convenience of the unmanned aircraft, a carrying extension drill bit is designed, and the extension drill bit has extension and retraction functions.

The invention discloses underwater blasting explosive bin installation equipment and an installation and blasting method in the technical field of water conservancy projects. The equipment consists of two parts, namely a thruster and an explosive bin, wherein the thruster comprises an excitation motor, a global position system (GPS) position indicator, a displacement sensor, a lifting electromagnet and a shell; and the explosive bin comprises explosive, a detonation body, an armature and an explosive bin shell. Operation of combining and separating the thruster and/from the explosive bin is implemented according to the electromagnetic technical principle. The explosive bin can invade a soil body under the actions of excitation force and gravity of the motor of the thruster, after the explosive bin reaches the preset burial depth, the thruster is separated from the explosive bin, and the explosive bin is installed and the thruster is recovered. Therefore, by the underwater blasting explosive bin installation equipment, a construction process of underwater drilling and explosive charging can be eliminated, the working efficiency is improved, the technology is implemented easily, the thruster can be recovered to be repeatedly used, and the construction cost is low.

The invention belongs to the technical field of underwater explosion tests, and particularly relates to a device and a method for carrying out an underwater explosion test on land. In order to overcome the defects of the existing test method, the invention provides a device and a method for carrying out an underwater explosion test on land. The underwater explosion test of a ship structure is simulated on the land, a large amount of financial resources, material resources and manpower are saved, boundary condition setting of the underwater explosion test of the structure is met, the operability of the test is high, and the popularization value and the practical value are extremely high. According to the invention, a traditional ship structure underwater explosion damage test is replaced, the traditional underwater test is transferred to the land, and under the condition of equal working conditions, the test is carried out on the land, so that the test boundary conditions are more controllable, the test process is clearer, the test is simple and convenient, and a universal test method is provided for carrying out multiple groups of tests by replacing test samples.

The invention discloses a large-area blasting compaction treatment method of a runway foundation. The method aims at large-area treatment of a deep and thick layer stone riprap foundation, and throw-filled stone obtained after dredging is adopted as a hydraulic foundation used for a runway. Segmentation slope underwater blasting tamping and land drilling blasting tamping are combined, the magnitude and the position of land blasting action energy are reasonably designed, hole bottom lower stone is blasted and extruded, and the compaction function is achieved. Reasonable throw-filling parametersand blasting parameters are calculated and designed, large-area and large-working-face advancing can be achieved, and the construction progress is accelerated.

The invention provides an underwater blasting construction method. The underwater blasting construction method comprises the following steps that an underwater blasting part is filled with filling bodies to a space above the water surface, and a construction platform is formed; a down-the-hole drill is used for following a steel sleeve to form a hole; the steel sleeve is stopped following after penetrating through the whole underwater filling bodies at least; the drill continues to bore to the designed position of bedrock, the drill is taken out, a PVC sleeve is inserted, and the steel sleeveis pulled out; a blasting device is bound and is put into the hole, and is blasted through an electric blasting network or a non-electric blasting network; and underwater blasting construction is completed through the above steps. With the adoption of the scheme, the underwater blasting construction can be completed under the working condition that a boring operation platform can not be set up dueto condition restriction, and the underwater blasting construction method is particularly suitable for achieving large-scale underwater blasting work under the working condition that the depth of water is relatively large.

The invention discloses a pilot ship sea test system and a ship overall performance test method thereof. The pilot ship sea test system comprises a pilot ship and an auxiliary ship system. The pilot ship comprises a ship body system, a data acquisition system and a remote control and remote measurement system. The ship body system comprises a ship body shell, a propelling device and a rudder device. The data acquisition system comprises a sensor, a data acquisition instrument and a first computer; the remote control and remote measurement system comprises a GPS/INS device, an AD module and a first radio station. The auxiliary ship system comprises a following speedboat and an environment measuring ship, and a second radio station and a second computer are installed on the following speedboat. Real and reliable data sources can be provided for ship comprehensive performance test and evaluation of stability, floatability, sinking resistance, resistance and propulsion, maneuverability andseakeeping, wave load, slamming load, underwater explosion, structural strength and the like of complete and damaged ships through the pilot ship sea test system.

The invention relates to an underwater explosive perforation bullet which is characterized by comprising a bullet body; a blind hole is disposed on the bullet body and sequentially provided with propellant powder and a perforation bullet, and a leading wire through hole is disposed on the bottom of the blind hole; a primer cap is buried in the propellant powder, and a leading wire of the primer cap is exposed out of the bullet body along the leading wire through hole. By utilizing the electromagnetic theory, the underwater explosive perforation bullet is absorbed on a hull part needing perforation, then the bullet is pushed by the powerful pressure generated by dynamite exploitation to impact an armor plate of the hull, thereby a hole with the same diameter with the bullet is drilled on the hull. The underwater explosive perforation bullet can conveniently, rapidly and easily drill the needed hole on the submerged armor plate hull.

The invention discloses an underwater high-voltage discharge bubble generation device which comprises a power supply module, a bubble generation circuit and a bubble generation metal wire, wherein the power supply module provides stable high-voltage direct current for the bubble generation circuit; the bubble generation circuit is connected with the bubble generation metal wire, and provides required discharge voltage for the bubble generation metal wire; the power supply module comprises a high-frequency signal generation device, a transformer, a high-frequency voltage doubling rectification circuit, a high-voltage direct current stabilizing circuit, a sampling circuit and a control loop; and the bubble generation circuit comprises a capacitance charge and discharge circuit and a charge and discharge switching control switch connected with the capacitance charge and discharge circuit. The device generates rapid water ionization and vaporization to generate very large bubbles by applying short-circuit discharge of the metal wire in a high-voltage underwater environment, can simulate an operating condition during practical explosion more actually, provides good assistance for researching the characteristics of underwater explosion bubbles, and disturbance and destroy of the underwater explosion bubbles to a ship, and is simple and convenient to operate, safe, reliable, high in repeatability, good in experiment effect and low in cost.

The invention provides an adjustable underwater explosion jet pipe mounting and dismounting tool, comprising a first shaft barrel, a second shaft barrel, a first shaft and a second shaft that are arranged in the first shaft barrel and the second shaft barrel respectively through bearings, an adjustable telescopic rod mechanism that is arranged between the outer portion of the first shaft barrel and the outer portion of the second shaft barrel, a gear box, and a first gear and a second gear that are arranged in the gear box. The second gear is meshed with the first gear; the second gear is mounted on a third shaft; the end of the third shaft extends out of the gear box and is provided with an installation sleeve for installing a jet pipe, one end of the second shaft extends into the gear box, the first gear is installed on the second shaft, one end of the first shaft is provided with a rotation driving mechanism, the other end of the first shaft and the other end of the second shaft areconnected with couplers respectively, and a universal joint is arranged between the two couplers. The adjustable underwater explosion jet pipe mounting and dismounting tool is used for solving the problems that an existing jet pipe is inconvenient to mount and dismount underwater, and harm is caused to a human body. Meanwhile, the device is low in cost and simple in structure, and the experimentefficiency is improved.

The invention provides a ship anti-impact protection structure based on aluminum honeycomb optimization, and the structure comprises a ship body outer plate, a ship body inner plate, a ship body girder, a ship body solid rib plate, an inner protection structure and an outer protection structure; a plurality of small cabins are enclosed by the ship body outer plate, the ship body inner plate, the ship body girder and the ship body solid rib plate, and the plurality of small cabins are filled with the inner protection structure; outer protection structures are added on the hull outer plate in blocks; the inner protection structure comprises a plurality of inner protection aluminum honeycomb blocks, a liquid circulation hole is formed in the center of each inner protection aluminum honeycomb block, and through groove openings are formed in the two side faces, the upper surface and the lower surface of each inner protection aluminum honeycomb block. Each inner protection aluminum honeycomb block is formed by arranging and extruding a plurality of honeycomb plates in parallel, and the shape of each inner protection aluminum honeycomb block is matched with that of the corresponding small cabin; and the outer protection structure is an aluminum honeycomb plate which is formed by transversely and longitudinally overlapping. By means of the capability of absorbing underwater explosion impact through crushing deformation of the aluminum honeycomb, the protection capability and vitality of the ship can be improved.

The invention discloses a device and a method for testing underwater explosion bubble energy of an electronic detonator. The method comprises the following steps of S1, fixing an auxiliary light source on one side of a shooting window of an explosion pool so as to provide a good light environment, and arranging a high-speed camera for recording on the other side of the explosion pool; S2, connecting one end of one electronic detonator with an initiating device, aligning the other end of the electronic detonator with the high-speed camera so as to form a complete test loop, and recording recorded bubble pulsation period data as t; S3, connecting one end of another electronic detonator with the initiating device, inserting the other end of the electronic detonator into a to-be-detonated explosive package, aligning the other end of the electronic detonator with the high-speed camera so as to form a complete test loop, and recording recorded bubble pulsation period data as t; and S4, calculating the bubble energy. According to the device and the method disclosed by the invention, the test efficiency and the test result accuracy are improved, and errors caused by manual reading are avoided.

The invention discloses a naval vessel underwater explosion bubble protection device and a protection method.The protection device comprises a hydrofoil strut of a hollow structure and a hydrofoil, a rotating shaft used for adjusting the attack angle of the hydrofoil is arranged in the hydrofoil in the radial direction in a penetrating mode, the hydrofoil strut is fixed to the bottom of a naval vessel head, and an air injection mechanism matched with the hydrofoil is arranged at the bottom of the naval vessel head; the lower ends of the two hydrofoil supporting columns are communicated with the upper ends of the hydrofoils in a sealed mode, and stroke control mechanisms matched with the rotating shafts in a linkage mode are arranged in the hydrofoil supporting columns correspondingly. According to the invention, super-cavitation bubbles and a moving cavitation field can be rapidly generated and are enabled to generate coupling response with underwater explosion bubbles, so that the jet flow and migration directions of the underwater explosion bubbles are changed, the damage effect of bubble load on a naval vessel is greatly reduced, the input cost is low, and the operation is simple. And the protection efficiency and the protection effect of bubble impact resistance of the naval vessel structure are greatly improved.