39results about How to "Reduce shock wave" patented technology

The invention relates to catalyst preparation, and aims to provide a preparation method of catalysts for oxygen production implemented through the decomposition of hydrogen peroxide. The method comprises the following steps of: immersing a nickel-foam solid sample into a silver nitrate solution, heating the obtained object, carrying out a replacement reaction, and cooling the obtained product to room temperature; taking an alkaline sodium borohydride solution, reducing nickel ions in the previous solution to metal nickel and depositing the metal nickel to the solid sample; and taking out the solid sample, calcinating the solid sample for 2-5 hours under nitrogen so as to obtain a silver catalyst taking nickel foam as a carrier. According to the invention, micropores of nickel foam are used as oxygen transport channels, so that the service life of the catalyst is greatly prolonged. Meanwhile, because the structure compatibility of nickel and silver is excellent, and silver atoms are dissolved in the crystal structure of nickel so as to form a solid solution, so that the mechanical strength of nickel foam can be enhanced, and the capability of a carrier to resist shock waves produced by the generation of oxygen is increased, thereby greatly improving the stability and reliability of catalysts.

The invention discloses a stone shallow hole blasting control method applied in a town and belongs to the technical field of blasting. The method comprises the following steps: dividing areas, excavating shock-absorbing ditches in a bench manner in different areas, arranging blast holes, drilling, loading and blocking, designing a blasting network, blasting area covering and building a vibration monitoring system. Due to the adoption of the method, the problem that a routine blasting manner is not permitted to complete construction in a city downtown and under a special environment is solved. The stone shallow hole blasting control method is proved to be effective in controlling both the blasting seismic effect and the harmful influence of scattering objects and the like, and in attenuating blast waves, thereby ensuring the construction safety.

The invention provides a manufacturing method of a large-power vertical light-emitting diode, relating to the technical field of a semiconductor photoelectric device. The manufacturing method disclosed by the invention comprises the following steps of: 1) generating an epitaxial wafer on a sapphire substrate; 2) evaporating a reflection metal layer on a P-type GaN-based semiconductor layer; 3) forming a current stopping layer on an N-electrode area and forming a protection type passivation layer on the side wall of a groove; 4) forming an isolation groove; 5) filling photoresist I into the isolation groove; 6) depositing a diffusion impervious layer on the surface of the device, electrically plating a seeding layer, etching to expose the diffusion impervious layer, and coating thick photoresist II; 7) forming a metal supporting layer above the device; 8) stripping the sapphire substrate from the device and cleaning; 9) roughening the surface and evaporating an N-type electrode; 10) cutting the device to from core particles; and 11) grinding and polishing the surface of the sapphire substrate. According to the manufacturing method disclosed by the invention, the stability of an LED (Light-Emitting Diode) in a vertical structure can be improved and the yield of the finished core particles is improved.

The invention relates to the technical field of earmuff filling structures and discloses a shock wave-preventing earmuff filling structure. The earmuff filling structure comprises an arc-surface-shaped bent wave isolation wall, wherein the wave isolation wall comprises a plurality of polyhedrons; the side edges of the polyhedrons are connected mutually; and a first cavity is formed in each polyhedron. Firstly, part of shock waves are reflected outwards by the surface of the wave isolation wall and do not penetrate through the wave isolation wall; secondly, part of the shock waves enter the polyhedrons of the wave isolation wall, and the first cavities are formed in the polyhedrons, so that the shock waves are reflected for multiple times in the first cavities of the polyhedrons, the shock waves are greatly weakened, a few shock waves are refracted and return to the outside of the wave isolation wall, only extremely few shock waves can penetrate through the wave isolation wall, the transmission of the shock waves is effectively weakened, and the shock waves are prevented from directly impacting ears of a user; and the shock wave-preventing earmuff filling structure is configured in an earmuff, so that when the external shock waves enter the earmuff, the shock waves can be greatly weakened and the ears of the user can be effectively protected.

The invention discloses a rock roadway deep-hole multi-wedge straight-hole internal subsection micro-difference cutting blasting method. A multi-wedge straight-hole inter-subsection micro-difference blasting technology is adopted to realize progressive enlargement of a cutting cavity and progressive deepening of the cutting cavity, a deep-hole column-shaped charge subsection micro-difference blasting technology is adopted to solve the belly phenomenon at the bottom of the cutting cavity, and the deep-hole cutting blasting method can realize the effects that a large cutting cavity and a cuttingcavity 3.0 m deep can be obtained, the percentage of large gangue dumped by cutting is small and the throwing distance of waste rock is reduced to 25-30 m. Sequential initiating is performed according to a primary oblique hole + a six-direction energy-gathering straight hole I section detonator, a secondary oblique hole first section + a central straight hole hollow hole II section detonator, a secondary oblique hole second section + a central straight hole bottom charging section + a tertiary oblique hole III section detonator to form a final cutting cavity, then auxiliary holes, caving holes and bottom holes are initiated by adopting a IV section detonator, and peripheral holes are initiated by adopting a V section detonator to complete full-section blasting; and the large cutting cavity can be provided, the free surface is enlarged, and the blasting efficiency is improved.

The invention provides a device for eliminating influences of a bubble jet flow in a cabin-section underwater explosion experiment. The device comprises a turbogrid plate, ropes and euphroes; the turbogrid plate is a quadrate composite plate with each side length of 2Rm, Rm is a maximal radius of each bubble, the first layer of the turbogrid plate is a rubber layer, a second layer of the turbogrid plate is a steel plate layer, the rubber layer and the steel plate layer are same in thickness, grids are uniform in size, and the area of the grids accounts for 1 / 2 of the total area; four corners of the turbogrid plate are respectively provided with a rope, and each rope is provided with one euphroe; and the turbogrid plate is fixed at a position D(D=0.4Rm) away from an explosion center below the explosion center by using the ropes. The device provided by the invention has the characteristics that: firstly the turbogrid plate can be used for attracting the bubbles so as to reduce the influences of the jet flow; secondly, by means of the transmission effect of the grids to a shock wave, the turbogrid plate can be used for greatly reducing the reflected shock wave so as to maximally lower the interferences of the reflected shock wave to a normal incident shock wave; and finally, the advantages of lower method cost, simplicity for workpiece processing, convenience for operation and better effect are achieved.

The invention discloses a blasting shock wave protection device which comprises a bottom board. A protection wall is arranged at the upper end of the bottom board and comprises a framework and a wallbody; the framework is composed of a plurality of cross beams and a plurality of vertical beams; a plurality of water curtain sprayers are evenly distributed on the surface of the protection wall andare connected with a water tank through a water pipe; and the water tank is located at the upper end of the bottom board and on the rear side of the protection wall. The protection wall is composed ofa protection net, a polyurethane foam plastic layer and a pvc soft board, the shock wave protection and rubble blocking functions are achieved, the structure is light, transportation is convenient, the device can be repeatedly used, the structure of the protection wall is more stable through the arrangement of the cross beams, the vertical beams and reinforcement ribs, a water curtain is formed through the water curtain sprayers to achieve the function of weakening shock waves, dust flying generated by blasting can be reduced, and the device can move conveniently through arrangement of universal wheels, and can be repeatedly used.

The invention discloses a seabed foundation pit blasting excavation underwater shock wave protective method and device. The method comprises the steps that (1) the position of a protective device is positioned according to the size of a foundation pit; (2) a flexible protective wall is manufactured and comprises a protective panel, protective reinforcement fabrics, springs and connection pieces, and the protective panel comprises a holed polyurethane foam panel, a chloroprene rubber interlayer and an air interlayer; (3) a protective device is installed and comprises the flexible protective wall, bottom shape steel, holed steel pipes and high-pressure air pipes, the lower portion of the flexible protective wall is connected with the bottom shape steel, the outer side of the bottom shape steel is connected with the holed steel pipes, the holed steel pipes communicate with the high-pressure air pipes, and the flexible protective wall is tied into a whole through ropes; and (4)a bubble curtain is formed through air inflation. According to the seabed foundation pit blasting excavation underwater shock wave protective method and device, the flexible protective wall and the bubble curtainare combined, effective reduction of underwater shock waves can be achieved close to a blasting zone, construction staff, marine organisms, the surrounding aquatic environment and underwater buildings are protected, meanwhile, through the absorption effect of the protective panel on the shock waves, shock wave reflection is reduced, and a foundation pit is protected.

The invention relates to a high impact force resistance gas-bag armor, in particular to a high impact force resistance gas-bag armor (or named as a novel bumper) used on an electric automobile. The high impact force resistance gas-bag armor is composed of high resistance foamed plastics, elastoplastics, a charging connector, a high pressure gas and a bumper beam. The invention is characterized in that the higher-thickness high resistance foamed plastics on the outer layer and the elastomer plastics on the inner layer encloses inwards to form a cavity, the gas-bag armor is also provided with the charging connector, the high pressure gas is filled into the cavity through the charging connector and used for absorbing impact energy, and the gas-bag armor is connected with the automobile body through the bumper beam to form an integral body for safety protection. The fuel automobile engine needs a gas inlet fence, but the pure electric automobile does not need the gas inlet fence, thereby leaving space for the installation of the gas-bag armor; therefore, the gas-bag armor is more suitable to be installed on a pure electric automobile. The invention uses the high resistance foamed plastics to enhance the strength of the gas bag, and the impact wave propagated by the high pressure gas in the gas bag can be effectively weakened, thereby satisfying the strength of the impact resistance and achieving the good effects of shock absorption and shock weakening.

The invention discloses an assembled multifunctional firework and firecracker retail cabinet. The cabinet comprises a storage room and a monitoring display room, the storage room and the monitoring display room respectively comprise splicing bottom frames and front side plates, right side plates, rear side plates and left side plates which are detachably connected by bolts in turn, the splicing bottom frames are detachably connected to the lower ends of the front side plates, the right side plates, the rear side plates and the left side plates, magnesium oxide boards are spread on the splicingbottom frames, the upper ends of the front side plates, the right side plates, the rear side plates and the left side plates are detachably connected with top plates, venting openings are formed in the top plates of the storage room, the venting openings are covered with venting covers, the sides of the venting covers are hinged with the top plates, dry powder fire extinguishers are suspended below the venting openings, and front side plates of the storage room and the monitoring display room are hinged with doors. The cabinet can reduce the transportation and manufacturing costs by adoptingan assembled design of the firework and firecracker retail cabinet.

The assembly to sort wood and cellulose materials, for the production of paper and cardboard, has paddles rotating within a sieve body with a structured radial gap (ar) between the paddle and sieve surfaces. An assembly to sort wood and cellulose materials, comprises paddles rotating within a sieve body (2), has a radial gap between the leading end (31) of the paddles in the direction of rotation (dr) and especially the leading end point or leading edge (310) of the paddle surface (30) towards the sieve, and the facing surface (20) of the sieve body, with a minimum gap (arv) at the leading end and an increased maximum gap (arh) at the trailing zone (33) or end edge (330) of the paddle. The paddles of the rotor are arranged in rows over each other, offset by height and / or around the periphery in relation to the sorting and / or peripheral line of the sieve body. The paddles are fitted to their shafts or the rotor body (300) by screws or rivets and / or an adhesive, solder or welding, especially so that the paddles can be replaced. The tangent plane (etf) at the leading end zone or near the tip or the leading edge of the paddle, towards the sieve body, is at an angle ( alpha ) of 0-15 degrees and preferably 0-8 degrees and especially 0-2 degrees with the tangent plane (ets) on the surface of the sieve body towards the paddle at the radial working line (ezs). When the rotor (300) with the paddles is in position, within the sieve body, the paddle surface at right angles to the rotor axis has a curvature which is larger than the curvature of the sieve surface towards the paddles. If the paddles are mounted outside the sieve body, their surface curvature is smaller than the facing outer surface (20') of the sieve body. The paddles have a plate structure, with a constant thickness (ms) from the leading to the trailing ends, preferably of 2-8 mm and especially 5-6 mm. The paddle plates are of curved sheets, with parallel outer and inner surfaces. The paddle surface towards the sieve body has a stronger curvature at the leading zone at the leading tip or edge than in the trailing zones, with a stronger curvature of 5-20% and preferably 10-15% stronger than the curvature of the facing surface of the sieve body. The curvature of the trailing zones of the paddle surface towards the sieve surface is 0-4% stronger than the curvature of the facing sieve surface. The transit between the two curvature structures is at the center one-third of the longitudinal line of the paddle surface, with a steady shift from the stronger to the weaker curve line. The surface of the paddle towards the sieve is parallel to the rotor (300) axis. The end surface of the paddle surface has a narrow rectangle shape, and both leading edge corners (3101, 3102) are rounded. On a plan view, the leading end of the paddle surface, in the direction of rotation, is narrower than the trailing end, in the shape of a triangle, delta, trapezoid or swallowtail. The side edges of the paddle surface are aligned outwards and back from the leading end by an angle of 40-120 degrees and preferably 60-90 degrees . The side edges are straight, curved or stepped. The paddle surface can be fitted with spaced linear projections or recesses, pitched at an angle of 10-45 degrees and especially 15-30 degrees to the working end (esf). The projections are held in place by solder, welding or an adhesive, or recesses are machined out as grooves. The separate paddles at the rotor together form an expanding spiral configuration in the direction of rotation. The rotor (300), fitted with the paddles, forms rotor modules, with the paddles fitted by carrier bars to the shafts from the rotor center. The ratio of the minimum paddle surface / sieve surface gap to the maximum gap (arh) is 0.05-0.5 and preferably 0.1-0.3. An Independent claim is included for paddles with mountings to be fitted to the carrier bars a sleeves, openings, drillings or shoulders, or threaded holes for screw fasteners.

The invention belongs to the technical field of the material science, and discloses a structural sheet, and a making method and an application thereof. The structural sheet is made by using the following components, by weight, 100 parts of a thermoplastic resin matrix, 5-10 parts of an impact resistant modifier, 3-5 parts of a compatilizer, 0.6-1.2 parts of an antioxidant and 40-60 parts of a glass fiber. The making method comprises the following steps: sequentially adding the above components into a high-speed mixer according to the above weight parts, uniformly mixing the components in the high-speed mixer, discharging the obtained mixture, and sealing; and adding the mixture into an extruder, carrying out melt blending extrusion, and carrying out hot pressing and cold pressing in a block press to make the structural sheet. The structural sheet can be used in a transport compartment body. The structural sheet has the characteristics of light weight, high strength, excellent impact resistance, and reduction of the vibration of explosion waves.

The invention aims to disclose novel explosion-proof glass, comprising an impact layer (1) and a protective layer (2) which are sealed with a sealing part (3), wherein the impact layer (1) is explosion-proof compound glass (5) or reinforced explosion-proof compound glass (5); and the protective layer (2) is composed of sandwich glass (14) or a plastic sheet (6); and a closed buffering chamber (9) is formed between the impact layer (1) and the protective layer (2) through the intervals of arranged buffers (8). An impact wave is buffered for the first time by arranging a protective rubber sheet in the reinforced explosion-proof compound glass; and the impact wave caused by explosion is buffered for the second time through the buffering chamber; at the same time, spattering of veneering glass fragments is further prevented by additionally adding the rubber sheet behind the protective layer; so that explosion can be prevented fundamentally; and the novel explosion-proof glass has significant effect for safety protection of banks, financial and public places.

The invention relates to the field of packaging materials, in particular to a production method of a composite railway transportation lined packaging bag provided with air bags. The packaging bag comprises a bag body provided with feeding pipes; the bag body adopts a rectangular structure comprising an upper sheet, a lower sheet, a left sheet, a right sheet, a front sheet and a back sheet; a plurality of round mounting holes arranged straightly are formed in the upper sheet; the lower ends of the feeding pipes are connected in the mounting holes; the bag body and the feeding pipes adopt dual-layer structures; and the two sides of the front sheet and the two sides of the back sheet communicate with the triangular buffer air bags. The packaging bag adopts the dual-layer bag body structure, has the good moisture-proof effect, is firm in structure and convenient to use, can relieve impact waves produced during feeding and can increase the feeding speed.

The invention discloses an anti-shock curtain wall. The anti-shock curtain wall comprises a vertical column, a cross beam and a curtain wall plate. The end face of the cross beam is inserted in buffer connecting pieces, two screw connecting holes are formed in each buffer connecting piece, and the buffer connecting pieces are positioned on the two sides of the vertical column; elastic washers are arranged between the vertical column and the buffer connecting pieces, the vertical column is connected with the cross beam through connecting screws, a spring is arranged on the tail of each connecting screw, and the vertical column is connected with the curtain wall plate through a tapping screw; and reinforcing pieces are arranged on the outer side of the curtain wall plate, two positioning holes are formed in each reinforcing piece, and the curtain wall plate is connected with the cross beam through bolts. The anti-shock curtain wall is simple in structure, and reasonable in design; by arranging the screws, the screw connecting holes, the bolts and the tapping screw, the strength of the structure of the curtain wall is reinforced; by arranging the buffer connecting pieces, the elastic washers and the springs, shock waves caused by earthquakes are reduced effectively, damages caused by the earthquake shock waves can be effectively reduced while functions of the anti-shock curtain wall are guaranteed.

The invention relates to packaging materials for railway transportation and specifically discloses a composite inner packaging bag with a damping airbag for railway transportation and a production method of the composite inner packaging bag. The composite inner packaging bag comprises a bag body with a feed pipe, wherein the bag body has a rectangular structure consisting of an upper sheet, a lower sheet, a left sheet, a right sheet, a front sheet and a rear sheet; a plurality of circular mounting holes are linearly formed on the upper sheet; the lower end of the feed pipe is connected in the mounting holes; the bag body and the feed pipe adopt a double-layer structure; the two sides of each of the front and the rear sheets are communicated with the triangular damping airbag respectively. The packaging bag adopts the double-layer structure, and is damp-proof, firm in structure, convenient to use, capable of relieving shock wave generated in the feeding process, and favorable for increasing the feeding speed.

The invention provides a medicine conveying cart used for placing medical supplies and relates to the technical field of medical equipment. The medicine conveying cart used for placing the medical supplies includes a storage box, damping devices are fixedly installed on the four corners of the bottom of the storage box respectively, a movable box is fixedly installed at the bottoms of the dampingdevices, rotating shafts are fixedly installed on the front and rear sides of the right side of the inner wall of the movable box, rotating blocks movably sleeve the front and rear sides of each rotating shaft respectively, and a fixing rod is fixedly installed on the left side of each rotating block. According to the medicine conveying cart, through installation of a baffle, a sponge pad and a first spring, shock waves generated by collision during movement of the medicine conveying cart can be greatly reduced, and damage to medical objects in the storage box is reduced. Moreover, through cooperative use of movable rods and the rotating blocks, when the baffle collides with an object, the rotating blocks can counterclockwise rotate to make braking plats brake universal wheels via throughgrooves, and therefore damage caused by continuous movement of the medicine conveying cart after braking is avoided.

The invention discloses a shockproof thermoplastic helmet liner. The shockproof thermoplastic helmet liner is formed by stacking multiple layers of sheets processed to be of a head shape. Each sheet is provided with hemispherical mold cavities distributed in an array mode. The hemispherical mold cavities are open. The hemispherical mold cavities in every two adjacent sheets are mutually embedded, or connected in a butted mode or engaged. The middle of the liner contains similarly spherical hollow bodies distributed in an array mode, and the hollow bodies are formed by mutually connecting the hemispherical mold cavities in every two adjacent sheets in a butted mode. A manufacturing method of the shockproof thermoplastic helmet liner comprises the steps that firstly, based on an injection molding technology, a pressing technology, or a blow molding technology, similarly helmet-shaped sheet base materials without the hemispherical mold cavities are manufactured; secondly, based on a suction and blow molding technology, the hemispherical mold cavities distributed in the array mode are formed in the sheet base materials; finally, according to the stacking mode of mutual embedment, butt connection or engagement, the sheets are stacked in a multi-layer mode, bonded and punched to obtain the shockproof thermoplastic helmet liner. The shockproof thermoplastic helmet liner has the advantages of being simple in structure, comfortable to wear, convenient to machine, environmentally friendly in material, capable of being used for personalized customization and the like.

The invention provides an overhead line data acquisition terminal power supply management system and method. The system comprises a power supply module, a CPU management module, an output control module and a communication module. The power supply output end of each power supply line of the power supply module is connected with the power supply input end of the output control module. The power supply output end of each power supply line is also connected with the corresponding power supply voltage signal acquisition input end of the CPU management module in a one-to-one correspondence way through the corresponding power supply signal acquisition device. The power supply output control signal output end of the CPU management module is connected with the control signal input end of the output control module. The power supply output end of the output control module is used for being connected with the power supply input end of the overhead line data acquisition terminal. The communicationport of the CPU management module is correspondingly connected with the communication port of the communication module. According to the system and the method, the more stable power supply can be provided for the overhead line data acquisition terminal so that the maintenance probability can be reduced and the maintenance frequency of the work personnel can be reduced.

The invention relates to catalyst preparation, and aims to provide a preparation method of catalysts for oxygen production implemented through the decomposition of hydrogen peroxide. The method comprises the following steps of: immersing a nickel-foam solid sample into a silver nitrate solution, heating the obtained object, carrying out a replacement reaction, and cooling the obtained product to room temperature; taking an alkaline sodium borohydride solution, reducing nickel ions in the previous solution to metal nickel and depositing the metal nickel to the solid sample; and taking out the solid sample, calcinating the solid sample for 2-5 hours under nitrogen so as to obtain a silver catalyst taking nickel foam as a carrier. According to the invention, micropores of nickel foam are used as oxygen transport channels, so that the service life of the catalyst is greatly prolonged. Meanwhile, because the structure compatibility of nickel and silver is excellent, and silver atoms are dissolved in the crystal structure of nickel so as to form a solid solution, so that the mechanical strength of nickel foam can be enhanced, and the capability of a carrier to resist shock waves produced by the generation of oxygen is increased, thereby greatly improving the stability and reliability of catalysts.

The invention discloses an auxiliary anti-explosion door system for a wind guide tunnel of a coal mine air shaft. The auxiliary anti-explosion door system is arranged on a top plate of a gate section of the wind guide tunnel and comprises a base, supporting strips, a door body, stand columns, a side buffering mechanism, a supporting rod mechanism, a top buffering mechanism and a top cover, the base is fixed to the top plate of the wind guide tunnel, the base is of a plate-shaped structure with rectangular explosion venting holes formed in the middle, a plurality of supporting strips are arranged in the rectangular explosion venting holes, the door body is located at the upper ends of the rectangular explosion venting holes, a plurality of round through holes are evenly distributed in the door body, an explosion-proof film is pasted on the door body, the four stand columns are perpendicularly fixed to the base, the tops of the stand columns are fixedly connected to the top buffering mechanism, the top cover is arranged on the stand columns in a penetrating and sleeve mode and installed at the lower end of the top buffering mechanism through the supporting rod mechanism, and the side buffering mechanism is fixed to the base and located at the side end of the door body. The auxiliary anti-explosion door system is good in explosion venting assisting effect, simpler in overall structure, lower in manufacturing, installation and maintenance cost and easy to apply and popularize.

A fire-proof high-voltage alternating current capacitor is disclosed, including a housing, a cover, two terminals, leads, insulating sleeves and cores. Each terminal includes a tapered front end; theinsulating sleeves comprise an upper insulating sleeve and a lower insulating sleeve, the cores connected in parallel via leads are arranged in the upper insulating sleeve and the lower insulating sleeve in parallel, the tail end of the last core in the parallel cores in the upper insulation sleeve and the head end of the first core arranged in the parallel cores in the lower insulation sleeve areconnected through the insulating sleeves through leads, the head end of the last core in the parallel cores in the upper insulating sleeve and the tail end of the first corein the parallel cores in the lower insulating sleeve are respectively connected to the tapered front ends of the two terminals through leads, and the tapered front ends are fixedly connected with the leads and the leads are fixedly connected to the terminals of the cores through a tin spot welding method. The capacitor has the characteristics of large capacity, small heat generation, explosion protection and the like. Thedesign of tapered front ends reduces a welding contact surface and heat generation, and the method of tin spot welding also reduces heat generation of the capacitor.

A bottom flow control method for a liquid-solid separating and settling tank relates to the method for controlling bottom flow of the settling tank which is used for carrying out liquid-solid separation of material liquid. The method is characterized in that in the control process, a density meter is arranged on a bottom flow discharge pipe which is positioned at the bottom part of the settling tank, the tail end of the bottom flow discharge pipe is connected with a feed inlet of a buffer tank, a discharge port of the buffer tank is connected with a variable-frequency speed regulating pump, the variable-frequency speed regulating pump is interlocked with the density meter, the opening and the closing of the variable-frequency speed regulating pump are controlled according to the deviation between the actual measured value of the density meter and the set value, thereby controlling the discharge amount of the bottom flow at the bottom part of the settling tank. The method implements the automatic regulation process technology of the bottom flow of the settling tank when adopting the settling tank for carrying out the liquid-solid separation, thereby being applicable to all the processes which adopt the settling tank for carrying out the liquid-solid separation of the material liquid. The method is used for optimizing the production process of aluminum oxide, improving energy efficiency, controlling precision, reducing energy consumption, reducing production cost and improving labor productivity.

The invention relates to the technical field of fire-fighting equipment, and discloses explosion-proof foam fire extinguishing equipment. The explosion-proof foam fire extinguishing equipment comprises a foam fire extinguishing equipment body, the outer wall of the foam fire extinguishing equipment body is fixedly sleeved with a fixed frame, the lower surface of the fixed frame is fixedly connected with a plurality of telescopic rods, the bottom ends of the telescopic rods are jointly and fixedly connected with a connecting block, the rod walls of the telescopic rods are movably sleeved with damping springs, the two ends of each damping spring are fixedly connected with the lower surface of the fixed frame and the upper surface of the connecting block correspondingly, and the upper surfaceof the connecting block is fixedly connected with a rubber block. According to the explosion-proof foam fire extinguishing equipment, the protection capacity of the foam fire extinguishing equipmentunder explosion shock waves of a fire scene can be effectively improved, the use safety of the foam fire extinguishing equipment is improved, the service life of the foam fire extinguishing equipmentis prolonged, the foam fire extinguishing equipment has a personnel cooling function, comfort of workers for operating the foam fire extinguishing equipment is improved, and the reliability and efficiency of the foam fire extinguishing equipment are further improved.

A method of segmented micro-differential cutting blasting in multi-wedge straight holes in deep holes in rock roadways, that is, the segmental micro-differential blasting technology between multi-wedge straight deep hole cutting holes is used to realize step-by-step expansion of the cavity and step-by-step deepening of the cavity, The deep-hole columnar charge segmental differential blasting technology is used to solve the phenomenon of bulging at the bottom of the cavity. This deep-hole cutting blasting method can realize a large cavity and a 3.0m deep cavity, and the rate of cutting large pieces of gangue is small. , The effect of shortening the throwing distance of gangue to 25-30m. According to the detonator of the first squint + six-direction energy-concentrating straight eye section I, the second squint first section + the center straight eye hole II detonator, the second squint second section + the center straight eye bottom charging section + the third squint section III detonator Sequentially detonate to form the final cut cavity, and then use the fourth section detonator to detonate the auxiliary eye, avalanche eye, and bottom eye, and use the fifth section detonator to detonate the peripheral eye to complete the full-section blasting; it can provide a large cavity, expand the free surface, and improve the blasting efficiency. efficiency.

The invention relates to a flat-head truck cab grille capable of absorbing impact kinetic energy, which belongs to the field of automobile accessories, and is characterized in that a hollow buffer pad made of rubber is uniformly arranged behind the grille, a buffer plate made of high-density resin is arranged behind the buffer pad, and a grid-shaped tensile steel wire mesh is distributed on the front surface of the buffer plate during hot press molding. A transverse strip-shaped reinforcing plate is adopted on the back face of the buffer plate which is connected with the front face of the cab through bolts in a multi-point mode. When the cab of the flat-head truck is impacted, as the middle net part is closest to a driver and passengers, after the cab is impacted, kinetic energy of impact is firstly transmitted to the rear rubber buffer pad, and the buffer pad absorbs part of the kinetic energy of impact and then transmits the kinetic energy to the buffer plate; after the buffer plate is subjected to impact waves, the impact waves are dispersed all around instantly through the steel wire mesh on the buffer plate, so that the whole buffer plate is stressed synchronously to achieve the purpose of absorbing impact kinetic energy in a large area to reduce harm of the impact kinetic energy to drivers and passengers.

The invention discloses a full-inflation full-insulation cable distribution box, and the box comprises an insulation bottom plate; a shell is installed in the center of the outer wall of the top of the insulation bottom plate through bolts, a damp-proof assembly is installed on the inner side wall of the shell through bolts, and an explosion-proof box is installed in the center of the inner wall of the bottom of the damp-proof assembly through bolts. A bus is arranged in the center of the outer wall of the top of the explosion-proof box, a demultiplexer is installed at the top of the inner side wall of the damp-proof assembly through bolts, the other end, away from the explosion-proof box, of the bus is connected with the demultiplexer through bolts, and a sub-line is installed on a tapping port of the demultiplexer through bolts. According to the invention, through the arrangement of the first joint and the second joint, the threaded connection of the first joint and the second jointfacilitates the installation of a connecting line and the sub-line by a user, and through the cooperative use of the threaded ring, the nut and the inflation joint, the structure can effectively protect the sub-line and the connecting line. Therefore, the structure can be subjected to inflatable isolation, and the use safety of the device is improved.