498results about How to "Reduce descent speed" patented technology

The invention relates to a forest fire extinguishing device, which comprises a fire extinguishing agent bin and a parachute bin. A micro-explosion dispersion device is arranged at a central position of the fire extinguishing agent bin; the periphery of the micro-explosion dispersion device is provided with the fire extinguishing agent; the periphery of the fire extinguishing agent is encapsulatedwith a cartridge case which is connected with the parachute bin; a temperature sensor and a control circuit are also arranged in a fire extinguishing bomb, wherein the temperature sensor and the micro-explosion dispersion device are connected with the control circuit through leads respectively; the fire extinguishing agent bin is a primary functional bin; and a parachute slows down the descent speed of the fire extinguishing bomb so that the fire extinguishing bomb descending slowly feeds temperature data reaching a set threshold back to the control circuit when landing on the upper part of the flame of a crown fire in combination with the temperature sensor, the micro-explosion dispersion device and a temperature control system of the micro-explosion dispersion device, and then the control circuit controls the micro-explosion dispersion device to generate an explosion to disperse the fire extinguishing agent, thereby highly-efficiency extinguishing the crown fire in a short range.

The invention discloses a backpack type emergency survival device which comprises a hollow non-closed spherical airbag and an air supply device in an airbag, wherein the air supply device charges a sandwich of the airbag by a charging connector on the inner wall of the airbag; and the airbag body is provided with a plurality of ventilation holes through which the inner cavity of the airbag is communicated with the outside. The emergency survival device has simple structure, is easy to carry, can be used as survival equipment under the emergency condition and is widely applied to aloftwork operation, sailing, exploration, earthquake, flood and other natural disaster environments.

The invention is a magnetic damping life apparatus which includes shell, spool, insurance ropes and driving device. The spool support on the shell through rotation shaft, one end of insurance ropes is fixed and wound on the spools. Said magnetic damping life apparatus also includes electrical and mechanical conversion device and energy receiving device, the spool drives the electrical and mechanical conversion device through the driving device, electrical and mechanical conversion device transforms the mechanical energy into electrical energy which is received by the receiving device to increasing the safety and practicality of magnetic damping life apparatus.

The invention provides an air conditioner control method and an air conditioner. When the air conditioner is in the refrigeration mode, an inner unit electronic expansion valve is subjected to proportional adjusting according to the target superheat degree of an indoor unit, and the inner unit target superheat degree is changed correspondingly along with changing of the indoor environment temperature, changing of the set temperature and changing of the outdoor temperature. Accordingly, the control precision of the indoor environment temperature is improved, and the starting frequency of a compressor is decreased.

The invention belongs to the technical field of iron and steel metallurgy and the field of gas-solid heat exchange or thermal reaction, and relates to a suspended reduction process of iron-containing materials and a secondary suspended reduction furnace device for implementing the process. In the injection reducing furnace, the gas phase and the solid phase flow upwards in parallel and the gas phase and the solid phase are in full contact, with large heat-transfer coefficient and large mass-transfer coefficient, so that the iron-containing materials are reduced and dried quickly and the retention time of material granules in the system is greatly shortened. The heat efficiency of the system is greatly increased. The thermal loss is reduced below 1800 kilocalories per kg of reduced iron-containing materials. The suspended reduction process has the advantages of high system stability, compact equipment installation, small size, low investment, high production capacity, high product metallization rate, controllable metallization rate within the range from 85% to 97%, and uniform product quality.

The invention discloses a telescopic type emergency escaping device for high-rise buildings, which comprises a safety screen (2) and a slide rail (1) arranged in the safety screen (2), wherein a hanging bracket (3) and a control device arranged in the hanging bracket (3) are arranged at top broadside of the high-rise building. The safety screen (2) comprises inner and outer two layers which are sleeved mutually; the slide rail (1) is distributed between the inner and outer layers of the safety screen (2) in spiral manner from up to down; and the inner broadside of the slide rail (1) is connected to the inner layer of the safety screen (2) while the outer broadside is connected to the outer layer of the safety screen (2). The telescopic type emergency escaping device for high-rise buildings is characterized in that both the inner wall of the outer-layer safety screen (2) and the outer wall of the inner-layer safety screen (2) are provided with protection pads for protecting the safety of people. By using the telescopic type emergency escaping device for high-rise buildings, when accident disaster happens, people can conveniently escape by opening the arranged telescopic type slide rail. The telescopic type emergency escaping device for high-rise buildings is convenient, quick and reliable to use.

The invention discloses an advanced treatment and reuse method of a pre-coated membrane of tail water of a sewage plant. The method comprises the following steps: firstly, feeding tail water into an adjusting pool so as to be homogenized, and then passing through a sand filter; passing through an ultrafiltration membrane by a solution containing a pre-coated membrane material and sand filtered effluent and effectively forming a dynamic membrane on the surface of the ultrafiltration membrane, wherein concentrated water of the ultrafiltration membrane returns to the adjusting pool while the effluent enters into a middle water tank; backwashing the ultrafiltration membrane through a pump by part of water in the middle water tank periodically, wherein the pre-coated membrane automatically falls and the sediment of the coating material is recycled to a pre-coated membrane material dosing device repeatedly, so that the operating cost is lowered; entering into reverse osmosis membrane treatment by water in the middle water tank, fresh reverse osmosis membrane is used as industrial water in the park to be returned, and the concentrated water is treated by an electrochemical reactor, and the effluent reaches the standard to be discharged. By adopting the pre-coated membrane method, the ultrafiltration backwashing frequency is low, and the water yield of the ultrafiltration membrane is improved. Loose filter cake layers with great holes can be formed to effectively relieve the rate of descent of membrane flux, improve the anti-pollution capacity of the membrane and improve the removal effect of the membrane on the water quality index at the same time.

The invention provides a feeding bin of an adsorption column, comprising a bin body (42) and a first tapered diversion block (45) opposite to a feeding hole (41) of the bin body (42); the inner wall of the bin body (42) is provided with a plurality of chutes (43) spirally extending from the top to the bottom of the bin body (42); diversion slits opposite to inlets of the chutes (43) are formed between the first tapered diversion block (45) and the inner wall of the bin body (42); and the bottom of the bin body (42) is provided with a plurality of discharging holes (46) communicated with a distribution pipe (10) of the adsorption column and linked with outlets of the chutes (43). By using the feeding bin provided by the invention, the falling loss in the active carbon filling process is reduced. The invention also provides an adsorption column with the feeding bin.

A high altitude escape device comprises a mooring rope and a speed controller; wherein the speed controller is arranged on the surface of the mooring rope, the mooring rope is suspended in the sky by a pulley to form two up and down slip sections, one section is a no-load section is sheathed in the speed controller, and the other section is a load section and is fixedly connected with the speed controller; the speed controller comprises a shell and is internally provided with a plurality of pin shafts at intervals more than the diameter of the mooring rope; wherein a braking pin shaft is arranged above or below at least one pin shaft in a sliding way; one section of the mooring rope sheathed with the speed controller winds the baking pin shaft and the pin shafts below or above the braking pin shaft at least in a dislocation way. In the invention, friction is produced between the mooring rope as well as the pin shaft and the braking pin shaft by dislocation winding of the pin shaft and the braking pin shaft in the no-load section of the mooring rope and the speed controller, thus achieving the effect of reducing the descent speed of the speed controller. The no-load section of the mooring rope winds the pin shaft of the speed controller in the dislocation way, so that friction is produced between the mooring rope and the pin shaft, thus achieving the aim of reducing the descent speed of personnel evacuation.

The invention discloses a liquid rocket. The liquid rocket comprises a first sub-stage of the rocket, a power tail cabin section, a parachute bag and an explosion separation structure, wherein the power tail cabin section is connected with the first sub-stage of the rocket through the explosion separation structure; an explosion separation surface is positioned between the bottom of a storage tankof the first sub-stage of the rocket and the power tail cabin section; the parachute bag is arranged on the power tail cabin section in a folding manner; after separation of the first sub-stage of the rocket, the explosion separation structure is detonated, so that the power tail cabin section is separated from the bottom of the storage tank along the explosion separation surface; and the parachute bag is opened to reduce the descending speed of the power tail cabin section. Compared with the prior art, the structure has the advantages of convenience in control, safety, reliability, low costand the like; and after the power tail cabin section is recycled, the power tail cabin section can be overhauled, tested, cleaned and reused.

The invention discloses a hydraulic filling type central air-conditioning unit and belongs to the technical field of central air-conditioning. The hydraulic filling type central air-conditioning unit comprises a compressor, a condenser, an expansion valve, an evaporator and a control unit for controlling a machine unit to run and further comprises a bypass pipe enabling a high-pressure refrigerant in the condenser to be led into the evaporator. The bypass pipe is provided with a solenoid valve controlling on-off of the bypass pipe, the evaporator is provided with a temperature sensor for detecting outflow water temperature, and the temperature sensor and the solenoid valve are electrically connected with the control unit. When the temperature of outflow water of the evaporator is larger than a set value, the compressor and the expansion valve are turned off, the high-pressure refrigerant is led into the evaporator by opening the bypass pipe, evaporating temperature of the refrigerant is improved, the speed of lowering the water temperature is slowed down, water in the evaporator is kept flowing continuously, the compressor and the expansion valve are restarted until the water in the evaporator reaches a certain temperature, and accordingly freezing of the evaporator is avoided.

The invention discloses an aloe extract and application thereof. A preparation method for the aloe extract comprises the following steps: (1) weighing and crushing aloe, soaking the crushed aloe with an aqueous ethanol solution having a concentration of 50 to 100% and accounting for 5 to 15 times of the crushed aloe, then carrying out reflux extraction several times, wherein extraction lasts for 1 to 5 h each time, carrying out filtering to obtain ethanol extracts and filter residues, combining the ethanol extracts, carrying out standing for 12 to 48 h, removing sediments through filtering and recovering the solvent to obtain a crude extract; (2) dissolving the crude extract with water, introducing the dissolved crude extract into a macroporous adsorption resin column, carrying out washing and desugaring, then carrying out elution with the aqueous ethanol solution having a concentration of 50 to 100%, collecting ethanol eluate and recovering the solvent so as to obtain an extract; and (3) dissolving crude extract with water, successively carrying out extraction with dichloromethane, ethyl acetate and n-butanol accounting for 5 to 15 times of the dissolved extract, carrying out concentration and extraction so as to obtain a water phase and then carrying out washing with methanol until a concentrate cannot be dissolved so as to obtain the final extract. The aloe extract provided by the invention can effectively prolong the shelf life of fruit and vegetable, reduce release of ethylene gas, maintain hardness of fruit and vegetable, delay the decrease speed of chlorophyll, decrease moisture evaporation, lower low temperature damage of fruit and vegetable, retain balance between sugar degree and acidity and improve luster of fruit and vegetable.

The invention discloses a high-rise electromagnetic damping escape device. The device comprises a rescue cabin module, a speed change wheel module and a magnetic damping speed reducing piston module;the rescue cabin module comprises a left side escape well and a right side escape well, a left side escape cabin, a right side escape cabin, and buffer pads arranged at the bottoms of the escape wells; the speed change wheel module comprises a double-rail rope wheel, a rope wheel center shaft, a speed change large gear, a speed change small gear, a cam and a rope; and the magnetic damping speed reducing piston module comprises a cam connecting rod, a magnet, a copper pipe and a protective cover. The magnet performs a reciprocating motion in the copper pipe; as the continuous change of the magnetic flux can be caused by the reciprocating motion of the magnet in the copper pipe, induction current can be generated on the copper pipe by the Faraday law; through the Lenz law, the generated induction current can be associated with an induction magnetic field to act on the magnet; and the descending speed of the rescue cabin can be reduced by using resistance continuously generated by the electromagnetic induction phenomenon in less space.

The invention discloses a method for prolong shelf life of cucumber, after harvesting cucumber, an antistaling agent is used for processing and preserving the cucumber immediately; The antistaling agent comprises the following raw materials by mass fraction: 50-65% of citric acid, 15-50% of acetylatedmono-glycerides, 5-15% of plant source natural antiseptic, 0.025-0.03% of natural color protection agent, 1-8% of nutrition intensifying agent, and 0.01-0.1% of trace element; wherein sum of mass fraction of the raw materials is 100%. The method can effectively prolong the fresh-keeping period of the cucumber, reduce the release of ethane, keep the hardness of the cucumber, delay the decreasing speed of chlorophyll, reduce moisture evaporation, reduce the low temperature damage on the fruit and vegetable, keep the balance of saccharic acid degree, reduce the browning due to scratch and block the harmful mushroom poison to prevent propagation harm, prevent mildew, and increase the luster of the fruit.

The invention discloses an air conditioning system and a defrosting control method thereof. The air conditioning system comprises a compressor, a reversing assembly, an outdoor heat exchanger, an indoor heat exchanger, a defrosting branch circuit and a heat storage assembly. In the refrigeration or defrosting process of the air conditioning system, a first valve hole is communicated with a second valve hole, and a third valve hole is communicated with a fourth valve hole; in the heating process of the air conditioning system, the first valve hole is communicated with the third valve hole, the second valve hole is communicated with the fourth valve hole, one end of the defrosting branch circuit is connected with the other end of the outdoor heat exchanger, and the other end of the defrosting branch circuit is connected with the other end of the indoor heat exchanger; the defrosting branch circuit comprises a throttling assembly and a valve body assembly, and the valve body assembly is used for controlling the on-off state of the defrosting branch circuit; and in the defrosting process of the air conditioning system, the valve body assembly starts, the defrosting branch circuit is communicated, and the heat storage assembly is opened to release heat indoors. According to the air conditioning system, the defrosting process of the outdoor heat exchanger at a low-temperature environment is accelerated, the loss of indoor heat in the defrosting process is reduced, and the comfort of a room is improved.