655results about How to "Reduce impact damage" patented technology

The invention discloses a method for filling and mining after ore caving, which includes the following steps: exploiting; mining quasi work; cutting work: including excavation of mine collection trench and patio cutting, cutting a patio at one end portion of a rock drilling chamber, cutting the patio by using a vertical deep hole ore falling stage chamber method, and enabling patio cutting to provide sufficient compensation space for actual mining; chamber extraction work: constructing a downward blasthole in the rock drilling chamber, filling and blasting, one-time blasting charging at the entire middle section height of the blasthole, and enabling blasting to adopt one-time lateral blasting and ore removal; filling and maintaining: closing all outlets communicated with a lower mine of the empty area, burying strainer pipes, leading in filling pipelines from the upper portion of the chamber, and filling and maintaining the chamber; and pillar recovery: recovering pillars after filling and maintaining the chamber, and the pillar recovery is the same as the chamber extraction work. The method for filling and mining after ore caving is high in recovery rate of mineral resources, small in blasting impact effect, low in cost and high in production efficiency.

A projectile launched from a conventional weapon; upon impact with a human target the projectile attaches to the target and stuns and disables the target by applying a pulsed electrical charge. The electric round is defined as non lethal ammunition directed to incapacitate a human, to prevent him from moving for a short time, to prevent him from committing a crime and to allow authorized personnel to arrest the target. A novel thin film technology transformer and thin film technology battery produce an electrical shock capable of stunning a human being in a device the size of a conventional bullet. The transformer and battery are smaller and lighter than conventional transformers and batteries with similar power output.

The invention provides a buried type side slope drainage system and a construction method thereof. The drainage system comprises a plurality of transverse drainage ditches and a plurality of vertical drainage ditches. The vertical drainage ditches are of drainage structures formed in the manner that after a slope is filled or dug according to a design drawing, drainage pipe pre-buried grooves are formed in the positions, corresponding to the vertical drainage ditches, of all levels of side slopes and platforms, drainage pipes are pre-buried in the drainage pipe pre-buried grooves, and protection structures are built on the upper portions of the drainage pipe pre-buried grooves. A force eliminating platform, an accumulating pond and a water collecting pond are built at the joint of the transverse drainage ditches and the vertical drainage ditches, the force eliminating platform is right opposite to water outlets of the drainage pipes in the upper level side slope, and water is led to the collecting pond and the water collecting pond in sequence and then is led into the vertical drainage pipes in the lower level side slope through the water collecting pond. According to the buried type side slope drainage system and the construction method, the constructed drainage system is buried underground, the continuity and attractiveness of side slope protection are not affected, the drainage pipes cannot be damaged by exposing and grinding, the drainage pipes are prevented from being blocked through a multi-layer filtering method, the drainage smoothness is improved, and maintaining cost is reduced.

The invention discloses a bionic mechanical leg imitating the motion function characteristic of an ostrich hind limb. The mechanical leg comprises a body, a hip joint motion mechanism, a knee joint motion mechanism and an ankle joint motion mechanism. The hip joint motion mechanism is composed of a motor and a crank-rocker mechanism, wherein the crank-rocker mechanism comprises a crank, a femur and a connecting rod. The knee joint motion mechanism comprises the femur, a first spring, a tibia, a metatarsus, a brake cable, a lower fibula, a second spring, an air cylinder and an upper fibula. The ankle joint motion mechanism comprises the metatarsus, a first apotelus bone, a second apotelus bone, a third apotelus bone, a third torsional spring, a second torsional spring and a first torsional spring. The ostrich hind limb capable of efficiently moving serves as the bionic prototype, through combination of testing on hind limb motion parameters during running of an ostrich and biological anatomic analysis, the mechanical leg imitating the ostrich hind limb is obtained through optimization design according to the tendon-bone and muscle-tendon interaction mechanism of the ostrich, and the mechanical leg is simple in structure, safe, reliable, low in vibration, and capable of efficiently saving energy.

The invention discloses a pressure relief type explosion-proof tank, which comprises a tank body and a tank bottom, wherein a cover plate with cover plate pressure relief holes is arranged on the top of the tank body; the tank body consists of an inner cylinder and an outer cylinder; the outer cylinder consists of an outer cylinder wall and an outer cylinder buffer layer arranged in the outer cylinder wall; the tank bottom is provided with an outer cylinder wall bottom plate; a buffering base plate is arranged on the upper part of the outer cylinder wall bottom plate, on the inner side of the outer cylinder buffer layer and on the lower part of the inner cylinder; outer cylinder wall pressure relief holes are formed on the outer cylinder wall bottom plate; the inner cylinder consists of an inner cylinder wall and an inner cylinder buffer layer in the inner cylinder wall; a buffering lining plate is arranged on the lower part of the cover plate and on an inner side of the inner cylinder buffer layer; the buffering lining plate and the buffering base plate are made of porous foam metals; the inner cylinder buffer layer and the outer cylinder buffer layer are made of closed pore foam metals; and the thickness of the buffering base plate is greater than that of the buffering lining plate. By the explosion-proof tank, fragments produced through explosion can be prevented from flying out of the tank so as not to damage surrounding equipment and crowd, the internal pressure of the tank body can be reduced through pressure relief, and the safety performance of the explosion-proof tank is improved.

The invention discloses a photovoltaic power generation apparatus. The photovoltaic power generation apparatus comprises a base, a first fixed block and a second fixed block, a pair of guide rods and a sliding plate, wherein the lower part of the first fixed block is hinged with the base; a sleeve is fixed at the lower part of the second fixed block; a nut is coaxially fixed in the sleeve; a rotary screw rod is perpendicularly arranged on the base; the screw rod extends into the sleeve and is meshed with the nut; the screw rod rotates under the drive of a motor; the two ends of the pair of the guide rods are connected with the first fixed block and the second fixed block respectively; a sliding groove matched with each guide rod is formed in each of the left and right sides of the sliding plate separately; multiple rectangular mounting openings are formed in the sliding plate in an up-and-down penetration manner; a rectangular plate having the same dimension and shape as the rectangular mounting opening is hinged with the lower edge of each rectangular mounting opening separately; a supporting plate is fixed on the lower edge of each rectangular mounting opening; the lower surface of the rectangular plate and the upper surface of the supporting plate are fixed with the two ends of a telescopic rod; and a solar cell panel is paved on the upper surface of the rectangular plate. The photovoltaic power generation apparatus has excellent windproof and wind-resistant performance.

Integral extensions to aid in the extraction of ammunition magazines from ammunition pouches are provided in three embodiments. In this embodiment, the sides of an ammunition magazine are extended, either by molding or affixing a handle directly to the sides of the magazine, to provide a handle. This embodiment provides a more steam-lined handle adapted for use specifically in the extraction of magazines from ammunition pouches and other storage means.

The invention discloses a multidimensional ecological drainage system for intercepting and controlling separate system rainwater pollutants into a river. The system is arranged on one side of a river bank and takes a stair-step shape along the river bank; rainwater in pipe networks flows into a first-stage water drop platform by rain-water pipes, enters a storage pond, flows into an ecological buffer zone by a second-stage water drop platform, and lastly flows into a plant growth detention pond; and the first-stage water drop platform and the ecological buffer zone are slope-shaped, and plants are planted in the plant growth detention pond. The system not only ensures drainage, but also reduces the risk that rainwater polluted run-offs directly flow into the river, reduces impact and damage to water quality of the water body in a river channel, effectively controls the pollutants in the river, effectively improves the water environment, and enhances the urban water landscape value.

The invention discloses a water-air vertical crossing vehicle, which comprises a central support, an aerodynamic device, an underwater power device, an electronic governor, a remote control receiver and a remote controller. The design density of the vehicle is greater than that of water, and the rotational speed of the aerodynamic device is gradually reduced when the vehicle enters water so as to reduce the impact damage to the vehicle; after the vehicle touches the water, the aerodynamic device is turned off, the vehicle is submerged below the water surface by the self-gravity of the vehicle, and then an underwater propeller is started up, so that the vehicle is in a submerged state; and the vehicle goes out of the water by relay propulsion of two-layer power. The water-air vertical crossing vehicle has the several interface-crossing capacity and the continuous navigation ability in multiple media, has the advantages that no auxiliary equipment is needed and the vehicle can be repeatedly used, and has stronger promotion and application values; and by using the layered design, at least one power device of the vehicle separately acts in air or water in the water-air medium crossing process, the situation that the power system works in the water-air two-phase environment is avoided, and the great damage of the water-air mixed environment to blades is prevented.

The invention discloses a novel three-dimensional chiral negative Poisson ratio multi-cell energy absorption structure. The structure comprises a plurality of energy absorption layers which are stacked in sequence, wherein the energy absorption layer comprises a plurality of hexagonal chiral structure unit cells; each hexagonal chiral structure unit cell comprises a central circular ring, first tosixth connecting rods; the rotation directions of the hexagonal chiral structure unit cells in the energy absorption layer are the same, and the first to sixth connecting rods of the adjacent hexagonal chiral structure unit cells are correspondingly connected to form an array; the hexagonal chiral structure unit cells of the adjacent energy absorption layers are in one-to-one correspondence and opposite in rotation direction, and interlayer spiral supporting structures are arranged between the hexagonal chiral structure unit cells corresponding to the adjacent energy absorption layers. By means of stacking of the micro structures, elastic displacement of the structure before reaching the yield limit is improved to a great extent, initial impact force is absorbed by means of large displacement, residual impact is absorbed by means of large counter force, and the structure has great advantages in absorption of centralized, repeated and small-magnitude impact energy.

This invention relates to the process of a kind of explode restrain material. chemical composition of it includes Si 0.1-0.6,Fe 0.2-0.7,Cu 0.05-0.1,Mn 0.6-1.2,Zn 0.05- 0.1,Ti 0.03-0.12,Na 0.02-0.07,and Al the rest .the process includes steps as follows: melt, de-sludge and de-airing, make body, milling, first anneal, hot press, cold press, second anneal, stamp to open the sew, tension.

The present invention relates to a cuttings-feeding rubber mixing technique, which belongs to the field of rubber-processing machines. The technique includes the following steps: (1) the storage of raw rubber, (2) the ripping of rubber blocks, (3) the weighing of cuttings, (4) the conveying of the cuttings, (5) the charging of the cuttings, (6) the mixing of the rubber material, (7) sheeting and cooling, (8) the stacking and storing of rubber sheets, (9) the granulating of the rubber sheets, (10) the mixing of rubber particles, (11) the weighing of the rubber particles, (12) the final mixing of rubber sheets, (13) sheeting and cooling, and (14) the stacking and storing of the rubber sheets. By the ripping of the rubber blocks, the granulating of the mother rubber sheets and two times of uniform mixings, the present invention realizes the uniform mixings of multiple batches of materials, so that the quality of the rubber material is more uniform and stable, and therefore the banburying effect is more ideal, and the following effects are achieved: The uniformity and stability of rubber mixing is improved, the efficiency of rubber mixing is increased, the impact damage of equipement is abated, and the automatization degree of material flowing is increased.

This invention relates to the use of elastomers with the sealing element of reciprocating gas compressor valves to increase the reliability of the gas tight seal within the reciprocating gas compressor valve and to increase the useful life of reciprocating gas compressor valve. The elastomeric material is either used as a coating layer on the sealing element of the reciprocating gas compressor valve, or as the entire sealing element. The elastomeric material acts as a cushion to reduce the wear on the sealing element, provides a superior gas tight seal, and is more tolerant of entrained dirt or liquids in the gas stream thereby increasing the operable life of the reciprocating gas compressor valve. Reducing the mean time between reciprocating gas compressor valve failures results in longer reciprocating gas compressor run times for the user, increased revenue generation for the user and safer operation of said equipment.

A windsurfing catamaran with a self-stabilizing wing. The wing is moved to the correct position by counter balancing water pressure from a rotating central keel connected to a central mast. The keel rotates in the opposite direction of the wing when the wing is moved off center by wind. The keel rotates such that a greater surface area is presented to water flow striking the keel. Water pressure on the keel offsets wind pressure on the sails and returns the keel and mast back to an upright position. This increases stability, lift, driving force, and speed. A central catamaran platform provides hinged struts and shock absorbers between the rear end of the central platform and planing hulls to reduce impact damage. The hinged struts and shock absorbers reduce water drag and the braking effect of repeated hull impacts with water resulting in a further increase in speed.

The invention relates to a method for reinforcing a drop shaft in an underground mine producing area and belongs to the field of metal mine and rock engineering reinforcement. The method is characterized in that the movement track of ores in the drop shaft during the ore discharge process is fully considered, model experiments and theoretical analysis method are adopted for determining the property of impact action and an impact failure region to the well wall generated by the ores according to the height of the drop shaft and the diameter of the drop shaft, the drop shaft is hereby divided into four stress regions, namely a first impact failure region, a second impact failure region, a fault fracture zone region and a wear-out failure region, and different forms are further adopted for reinforcement. The method is especially applicable to reinforcement of the drop shafts in the producing areas under soft and broken surrounding rock conditions, can be used for significantly prolonging the service life of the drop shaft and has the advantages of safety in construction, simpleness and low cost.

The invention relates to the field of metal alloy refining, in particular to a stable operation method for restraining deteriorated alusil alloy strontium from inhaling, which comprises the following steps of inputting main components of alusil alloy into a crucible so as to be melted into alloy liquid, and keeping the temperature of the alloy liquid between 690 and 780 DEG C; sequentially inputting secondary components of the alusil alloy into the crucible so as to be melted and evenly mixed, inputting alterant with element of strontium into the crucible so as to be melted and evenly mixed, wherein according to weight, the element of strontium is 0.005%-0.03% of alusil alloy product, the temperature of the liquid is always kept between 690 and 780 DEG C; and keeping the temperature of the alloy liquid between 690 and 780 DEG C, and standing. According to the method, alloy liquid can be effectively prevented from inhaling, and the alloy liquid with the strontium deteriorated can be guaranteed to be valid for more than 7 hours.

The invention discloses an energy-absorbing method based on a dynamic polymer. The method employs a dynamic polymer containing a cyclic organic borate bond and an optional supramolecular hydrogen bondfor energy-absorption, wherein the cyclic organic borate bond exists as a polymeric chain joint and/or cross-linked chain joint for the dynamic polymer and is a necessary condition for the formationor maintenance of the structure of the dynamic polymer. Due to dynamic reversibility of the cyclic organic borate bond, the dynamic polymer has an energy dissipation characteristic; as an energy-absorbing material, the dynamic polymer can provide the good functions of damping, shock absorption, sound insulation, noise abatement, impact resistance and the like; and the dynamic polymer is especiallyapplicable to the body protection of people during exercises, daily life and working, the body protection of the military police, explosion prevention, protection in airborne landing and aerial delivery, collision prevention of automobiles, anti-impact protection of electronic products and electric appliances, etc.