37results about How to "Improve ventilation quality" patented technology

The invention relates to a Y-shaped ventilation method, which comprises the following steps of: A. when tunneling at a gate road of a mining face, combining the gate road and retaining roadways along a goaf and tunneling, and building 'concrete pier columns in the roadways' therebetween; B. after finishing digging a through cut, digging the gate road and the through cut at the mining face in the next section; C. after starting stopping, building a 'separation wall' between the concrete pier columns with the propelling of the mining face to separate the goaf; and D. when the mining face stopes, accessing fresh air flow in two paths, wherein in one path, the air is accessed from the gate road of the mining face and is exhausted to the lower outlet of the mining face through the mining face; and in the other path, the air is accessed from the gate road of the mining face and one side of a mining stopping line in the retaining roadways to join with the lack air flow of the mining face at the lower outlet of the mining face; and the lack air flow comes to a return airway of the mining area through the lower outlet of the mining face to the separation of the pier columns, the separation wall sections of the retaining roadways, the next section through cut and the gate road and the retaining roadways to finish Y-shaped ventilation. In the invention, the method of new retaining roadways along the goaf, namely gate road and retaining roadways are combined to tunnel the concrete pier columns support and protection in the arranged roadways, thus, Y-shaped ventilation can be realized, coal dust can be reduced, ventilation quality can be improved and the temperature can be reduced. And the method is particularly suitable for the coal mines with high-temperature and high gas.

The invention relates to an inducing ventilation system of a ship engine room. The inducing ventilation system comprises an air blower, an exhaust fan and an electrical control cabinet. The air blower and the exhaust fan are arranged at the tops of inner corners of the two sides of an engine room body respectively. The air blower and the exhaust fan are communicated with air inside and outside the ship engine room under the control of the electrical control cabinet. Inducing fans are arranged in the ship engine room, air inlets of the inducing fans are provided with air heat exchangers, and air outlets of the inducing fans are provided with jet flow nozzles in a scattered shape. The inducing fans are arrayed at intervals in a head and tail corresponding mode to form multiple circulation rings, wherein according to the circulation rings, air enters from the air blower, and air discharging is achieved through the exhaust fan. The air performs relaying according to a preset process through the inducing fans, so that an air flow pushing and pulling effect is achieved, a velocity field of air flowing is generated in the whole ship engine room, and ventilation is smoothly performed on the engine room. The arrayed inducing fans form relaying inducing air blowing, so that air pipes are omitted, space is saved, and cost is reduced.

Disclosed is a ventilator comprising a ventilation device which produces a respiratory gas flow for ventilating at least one patient and sets the respiratory gas flow to at least one ventilation pressure depending on at least one respiratory phase of the patient. Provision is made of a monitoring device which is suitable and configured for monitoring a synchronicity between respiratory phase and target ventilation pressure and, to this end, capturing a characteristic signal for the ventilation pressure and a characteristic signal for the respiratory phase of the patient and comparing the two signals to one another and determining a characteristic for the synchronicity on the basis of the comparison.

The invention relates to a cylinder type rearing table labor-saving silkworm rearing device.The device comprises supporting columns, transverse frames, cylinder middle shafts, cylinders and a base plate.When the device is used for rearing silkworms, young silkworms distributed to farmers can be placed on the cylinders at the upper ends of the transverse frames for feeding after three-instar moulted silkworms in a cooperative rearing room are fed with mulberry leaves for 1-2 times.A cylinder type three-dimensional rolling silkworm rearing mode is adopted, the cylinders make the silkworms, silkworm feces and residual leaves separated, a well-layered three-dimensional structure that the silkworms are on the cylinders and the silkworm feces and the residual leaves are below the cylinders is formed, ventilation quality is improved objectively, the silkworm rearing bed environment is improved, the situation that a lot of silkworm feces is accumulated and fermented on a silkworm rearing bed and accordingly a large number of bacteria are bred is avoided, healthy growth of the silkworms is facilitated, and the development process is obviously accelerated.Meanwhile, the procedure of labor-saving silkworm feces removal can be easily achieved.The device has the advantages of being high in quality and yield, capable of saving labor, reducing cost and improving efficiency, and easy to use.

The invention discloses a high compression ratio two-stroke gasoline compression ignition device and a control method. The stroke length of an air cylinder of the device is 90mm-110mm; a fuel injector and an electric heating plug are separately mounted on the top of the air cylinder; five scavenging ducts are separately formed in the side wall of a crankcase; the lower port of each scavenging duct communicates with the crankcase and communicates with the gas cylinder; a scavenging duct valve is mounted at the lower port of the fifth scavenging duct; a gas inlet is formed in the side wall of the crankcase, and a gas inlet pipe communicates with the crankcase; a gas compressor, a gas inlet control valve, an intercooler and a reed valve are successively mounted on the gas inlet pipe along the gas inlet direction; one end of a gas inlet by-pass pipe is connected to a gas inlet pipe between a turbine motor and the intercooler while the other end is connected to a gas inlet pipe between the intercooler and the reed valve; and an exhaust recycling pipe communicates between the outlet port of an exhaust pipe and the inlet port of the gas inlet pipe. The power is improved, and the oil consumption and discharge are reduced.

The invention provides a ventilation system for a coal mine and a control method thereof, and relates to the technical field of mine ventilation. The ventilation system comprises a main fan device, a storage device, an auxiliary fan device and a detection terminal, wherein the main fan device is used for purifying air, conveying the purified air into the mine and carrying out gas recovery treatment at the same time; the storage device is used for storing liquefied carbon dioxide and converting the liquefied carbon dioxide into carbon dioxide gas for fire extinguishing; the auxiliary fan device is used for conveying the purified air into each branch mine and detecting the air speed and the air volume of ventilation in the mine; and the detection terminal is used for detecting the temperature, the fire disaster and the gas concentration in each branch mine. According to the ventilation system for the coal mine and the control method thereof, air purification, dust falling and cooling can be realized through an air purification device, a negative ion generator and an atomizer, independent environment detection of each mine can be realized through an air speed sensor, an air volume sensor, a temperature sensor and a gas concentration sensor, fire extinguishing can be realized through a photoelectric smoke sensor and a carbon dioxide liquefaction storage tank, and gas recovery can be realized through a gas recovery device.

The invention relates to a surrounding rock forming machine for a rectangular tunnel, comprising a base. A first framework and a bracket are arranged on the base; the upper part of the first framework is provided with a second framework, one end of the second framework is articulated with the bracket, a driving device for driving the second framework to rotate around the articulated position is arranged between the other end of the second framework and the bracket, the first framework and the second framework are provided with a car and a power transmission device for driving the car to move, and a cutting device is arranged on the car; and during construction, a plurality of holes are processed by a tunnel surrounding rock cutting mechanism, then a surrounding rock at the lower part of a tunnel is processed by the first framework and the cutting device, and a circular arc at the upper part of the tunnel is processed by the second framework, the cutting device and the driving device. The processing method has the advantages of no drilling and blasting, safety, reliability, good ventilation quality, reliable engineering quality, standardized construction, movable protection and the like, and capable of guaranteeing the safety of construction workers.

The invention discloses a long distance and large diameter vent hose, an installation method thereof and a ventilation system, which aim at solving the problems of complex structure, high cost and the like of the prior art. The vent hose is a textile tubular fabric. The ventilation system comprises at least one blower station which is arranged outside an underground work and the vent hose which is used for communicating the blower station and the working surface of the underground work, wherein, the vent hose is prepared from the textile tubular fabric. The vent hose is characterized in that: the vent hose is fixed on the internal wall of a laneway by using one net cord or a plurality of net cords, and both the products and method used have the advantages of light weight, convenient installation, longer single segment air duct, few connection points, quite low rate of air leakage, good ventilation quality, small ventilation resistance, energy conservation, and the like.

The invention provides a crankshaft-free two-stroke reciprocating engine. According to the crankshaft-free two-stroke reciprocating engine, conversion between reciprocating motion and rotary motion is completed through relative motion of a cylindrical cam groove and a piston roller. Compared with a crankshaft connecting rod mechanism, the crankshaft-free two-stroke reciprocating engine has the advantages that the parts are less, the structure is simple, the combination is flexible, the maintenance is convenient, and inherent dumping moment of the crankshaft connecting rod mechanism is eliminated. According to the design of the crankshaft-free two-stroke reciprocating engine, an offset swing exhaust valve is also adopted, an exhaust port and an exhaust passage are located on one side of the center of an air cylinder, and the exhaust valve swings according to a path determined by a guide rail and a swing valve ball head while vertically descending, so that an opening is right against the scavenging flowing direction. According to the design of the crankshaft-free two-stroke reciprocating engine, sweeping pneumatic energy is sufficiently utilized, the ventilation quality is improved, an oil sprayer or a spark plug can be flexibly arranged, the oil mist distribution and ignition quality is improved, and the combustion effect is improved. Due to the fact that limitation of a crankshaft is avoided, multiple engines can be flexibly arranged, merged or separated, the ignition interval is adjusted, and stable and efficient operation is achieved.

The invention aims to provide an intake valve type eddy current scavenging two-stroke diesel engine. The intake valve type eddy current scavenging two-stroke diesel engine comprises an air cylinder, an oil spray nozzle and a piston. The piston is located in the air cylinder, and the oil spray nozzle is arranged at the top end of the air cylinder. The air cylinder is provided with an air inlet andan air outlet, the air inlet and the air outlet are formed in the two sides of the air cylinder correspondingly, the air inlet is formed above the side face of the air cylinder, the air outlet is formed below the side face of the air cylinder, the air inlet is connected with an air feeding channel, and the air feeding channel is provided with an intake valve. Due to the intake valve, waste air discharging can be more thorough by controlling switching-on and switching-off of the intake valve, and heat exchange quality is improved. In addition, air enters the air cylinder in an inclined manner and flows along the inner wall of the air cylinder in a surrounding manner to form an intake swirl, and the intake swirl not only contributes to operation of the scavenging process, improvement of mixing of oil and air and fuel combustion but also performs good cooling on the inner wall of the air cylinder.

The invention discloses a vegetable greenhouse facilitating ventilation. The vegetable greenhouse comprises a base rack, a first rotation rod is arranged on the top of the base rack, and rolling bearings sleeve the two ends of the first rotation rod; first fixing rings sleeve the rolling bearings, the inner walls of the first fixing rings are fixedly connected with the outer surfaces of the rolling bearings, and a greenhouse rack is fixedly connected to the bottoms of the first fixing rings; a sliding groove is formed in one side surface of the greenhouse rack, thin film is fixedly connected to the outer surface of the first rotation rod, and sliding rods are fixedly connected to the side surface, away from the first rotation rod, of the thin film; pulleys are fixedly connected to the twoends of each sliding rod and clamped to the interior of the sliding groove, fixing blocks are fixedly connected to the side surfaces, away from the thin film, of the sliding rods, and strong springs are fixedly connected to the side surfaces, away from the sliding rods, of the fixing blocks. The vegetable greenhouse facilitating the ventilation has the advantages that the ventilation work is simple and the ventilation effect is good when vegetables in the vegetable greenhouse needs ventilation.

The invention discloses a smoke exhaust method for shallow tunnel construction. Vertical shaft smoke exhaust channels communicating with the ground are formed in the top of a tunnel with the shallower buried depth at intervals, the vertical shaft smoke exhaust channels communicate with the ground through steel pipes, the steel pipes are higher than the ground, and rain shielding devices are arranged at the tops of the steel pipes. According to the shallow terrain characteristics of the tunnel, the method that vertical shafts are formed in the top of the tunnel, and the vertical shaft smoke exhaust channels conduct natural ventilation and smoke exhaust through the chimney effect of air circulation is adopted, turbid air is exhausted to the ground through the vertical shaft smoke exhaust channels, and therefore the air quality of a tunnel face is improved, ventilation and smoke exhaust in the construction process are accelerated, and the smoke exhaust efficiency in the tunnel construction process is improved.

The invention belongs to the technical field of building ventilation, and particularly relates to a ventilation energy-saving system of a green building, which comprises a wind collecting mechanism and a power generation mechanism, one end of the wind collecting mechanism is connected with a temperature adjusting assembly through a bolt, and one end of the temperature adjusting assembly is connected with a filtering mechanism through a bolt. The temperature adjusting assembly is connected with the heating device and the condenser through guide pipes. The air conditioner indoor unit has the beneficial effects that by arranging the first guide pipe, the first hose, the second guide pipe, the third guide pipe and the air uniformizing device, ventilation can be conducted in different directions, the problem that indoor ventilation is not uniform due to the fact that the air direction is fixed is solved, and the air conditioner indoor unit is high in practicability. Through the arrangement of the temperature adjusting assembly, the heating device and the condenser, the ventilation temperature can be adjusted, so that the problem that people feel uncomfortable due to the fact that hot air is introduced in summer or cold air is introduced in winter is avoided, the heating device adopts a water bath heating mode, and the heating effect is good.

The invention discloses an opposed piston four-stroke engine based on air valve ventilation. The opposed piston four-stroke engine based on the air valve ventilation comprises a machine body, two crank and connecting rod mechanisms, a drive shaft, an air distributing mechanism, a fuel oil supply system and a lubrication system, wherein an inner cavity of the machine body is used as an air cylinder, air distributing mechanism valve installation holes distributed along the circumferential direction of the machine body are formed in the outer circumferential surface of the machine body, the air distributing mechanism is used for achieving the air valve ventilation, the two crank and connecting rod mechanisms are arranged at two ends of the machine body, the fuel oil supply system is used for supplying fuel oil into the machine body, the lubrication system is used for lubricating the crank and connecting rod mechanisms and the inner circumferential surface of the machine body, and the crank and connecting rod mechanisms transmit power to the drive shaft so as to drive the lubrication system, the air distributing mechanism and the fuel oil supply system to run respectively through a fuel pump gear, an air distributing mechanism gear and a fuel supply cam, which are arranged on the drive shaft. The opposed piston four-stroke engine based on the air valve ventilation can improve ventilation quality of an opposed piston engine, and improves heat efficiency of the opposed piston engine.

The invention relates to the technical field of ventilation devices of mining wells, in particular to an anti-blocking fresh air ventilation device for mining wells. The anti-blocking fresh air ventilation device comprises ventilation equipment and a driving gear ring, wherein the ventilation equipment comprises a ventilation pipeline; a driving rod is connected to the interior of the ventilationpipeline; first rotating blades are fixedly connected to the outer surface of the driving rod; a rotating cleaning rod sleeves the outer surface of the driving rod; a branch through pipe is fixedly connected to the top end of the ventilation pipeline; a port pipe is fixedly connected to the right end of the ventilation pipeline; a first adjusting net is fixedly connected to the top end of the leftside of the ventilation pipeline; and a second adjusting net is connected to one side of the first adjusting net. According to the anti-blocking fresh air ventilation device for the mining wells, through the cooperation of the driving rod and the first rotating blades and a rotating rod and second rotating blades, the circulation of air is accelerated; and the problem of blockage is solved by cleaning the inner wall of the ventilation pipeline, the personal safety protection of workers in mines is improved, and granular materials are more convenient and fast to process.

The invention relates to an engine air cylinder. The engine air cylinder comprises an air cylinder body, the air cylinder body is provided with an exhaust hole and a scavenging hole which penetrate through the side wall of the air cylinder body, moreover, the exhaust hole and the scavenging hole are oppositely arranged, the highest point of the exhaust hole is higher than the highest point of thescavenging hole, and the lowest point of the exhaust hole and the lowest point of the scavenging hole are arranged at the same height. Therefore, when the engine air cylinder is applied to a two-stroke engine, the heat efficiency of the two-stroke engine is improved, the ventilation quality is improved, and the ventilation effect is good. The invention further relates to the two-stroke engine. Therefore, the technical problems that in the prior art, the heat efficiency is low, the ventilation time is short and the ventilation quality is low are solved. The invention further relates to a control method for working circulation of the two-stroke engine. Therefore, the technical problems that in the prior art, the heat efficiency is low, the ventilation time is short and the ventilation quality is low are solved.