35 results about "Mouth pressure" patented technology

The invention relates to a dual-purpose multi-channel hydraulic proportional valve which comprises a pump connecting module. The second main oil channel of the pump connecting module is communicated with the oil inlet of the pump connecting module, a hole in the valve rod of a three-way overflow valve and an oil channel in the valve rod in sequence, one channel is connected to a first throttling hole and a valve rod spring cavity, and the other channel is connected to the left end of the valve rod of the three-way overflow valve. A first loading pressure feedback oil way channel is connected into an LS oil inlet of the pump connecting module, a small hole, a second throttling hole, an oil hole and the valve rod spring cavity in sequence through pressure oil fed back by an execution module, and the second throttling hole is communicated with the oil channel between the small hole and a third throttling valve and the oil channel between the first throttling hole and the valve rod spring cavity. According to a control pressure oil channel, pump outlet pressure oil passes through a small oil mouth and a P oil mouth pressure collecting point from the oil inlet of the pump connecting module to enter a pressure reducing valve, and the other end of the pressure reducing valve is connected with the execution module through the oil hole. The dual-purpose multi-channel hydraulic proportional valve is suitable for variable pumps and metering pumps, and only supplies necessary flow for maintaining system working under the working pressure needed by loads.

The invention discloses a method for predicating a combustion speed of cigarettes based on detection of pressure drop and flow field distribution. The method comprises the following steps: determiningmouth-by-mouth pressure drop in a smoking process of a cigarette sample by utilizing a pressure drop detection device; determining air flow of a combustion cone end by utilizing a flow detection device; determining the combustion speed under a corresponding smoking opening sequence by utilizing a combustion speed detection device; taking mouth-by-mouth pressure drop changes and the air flow as independent variables x1 and x2 respectively and the combustion speed y as a dependent variable, so as to obtain a regression equation of a prediction model of the combustion speed of the cigarettes; after determining the mouth-by-mouth pressure drop changes and the air flow of the combustion cone end in the smoking process of other cigarettes, substituting into the prediction model, so as to obtainthe combustion speed of the cigarettes. According to the method disclosed by the invention, an experiment process for determining cigarette combustion property parameters is simplified and a basic detection method of the combustion speed is supplemented; unstable factors in the determination are determined and data processing in a traditional method is simplified. Furthermore, basic data is provided for guiding cigarette material researches, cigarette combustion and smoking mechanism analysis and cigarette material designing.

Lead-screw nut vice transmission control device and the method and the processing method of nut components, the torque sensor in hydraulic control device of control device changes the torque transmitted by lead-screw into signals and transmits the signals to controller, the controller sends the oil duct reversing control signals on the three-position four-way magnetic reversing solenoid valve, the controller controls the output mouth pressure of pressure control valve which is transmitted on the side surface contacted with nut and lead-screw through two pipelines, the screw thread two sides of nut is opened with two spiral oil-storing grooves which are sealed and formed by two end covers of nut two ends and the surface contacted with nut and lead-screw; the control method is: the controller controls the output mouth pressure of pressure control valve to make it is less than or equal with 8TN / ((phi12-phi22)L), the processing method is: first assembling the nut and two end covers into one unit, processing screw thread on the inner hole surface of nut and two end covers, then processing two spiral oil-storing grooves on the screw thread two sides of nut, last assembling the nut and two end covers into one unit.

The invention provides a remote well natural gas recovery device which mainly comprises a water jacket heater, a gas-liquid separator, a filter, a dehydration device, a reciprocating compressor, a gas charging pillar, a gas generating set and the like, and is characterized in that gas generated from a remote well is heated by a heating furnace, the heated gas enters the gas-liquid separator and the filter for separation and filtering to remove a liquid phase and a solid phase via separation and filtration, the filtered product is dehydrated by a molecular sieve, the dehydrated product enters the reciprocating compressor, the compressed product is pumped into a CNG trailer after being measured by the gas charging pillar to serve as CNG commercial gas for sale; when the CNG trailer containing the recovered gas is driven to a gas gathering station of a gas field, and the recovered gas is pumped into a pipe network again, charged gas enters a by-pass of the dehydration device directly; when the pressure in a well mouth is equal to or higher than 20 MPa, the charged gas enters a by-pass of the compressor directly; fuel gas of the gas generating set and the water jacket heater is supplied through a rear process pipeline of the dehydration device; and the whole set of the remote well natural gas recovery device is mounted on two semi-trailers, and fixedly erected on a well field via a hydraulic jack. The remote well natural gas recovery device is suitable for recovery of scattered natural gas in high-yield or intermittent-production remote wells of different well mouth pressures; the moving, transportation and mounting are convenient and fast; the adaptive capacity is high; and the recovery cost is low.

The invention provides an exercise trumpet capable of adjusting length of the trumpet body. A trumpet mouth pressure reducing practicer convenient for beginner practice and extending the length of thetrumpet body is arranged between the trumpet mouth and the intake pipe, while extending of the length of the trumpet body affects the accuracy of musical sound pitch. The solution is to cut off halfof the extending length of the intake pipe and the exhaust pipe so as to offset the influence of the extending length of the trumpet body and ensure the original length and the pitch of the trumpet body and facilitate the beginner to practice. When the trumpet is normally used, the practicer is removed, the two end parts of the main tuning pipe are extended by the length equal to the length cut off from the intake pipe and the exhaust pipe, or the upper pipe and the lower pipe sleeve between the main tuning pipe and the intake pipe and between the main tuning pipe and the exhaust pipe, and thelength of the upper pipe and the lower pipe is equal to the size cut off from the intake pipe and the exhaust pipe and are connected by connecting rods so as to ensure the original length of the trumpet body of the trumpet. According to the trumpet, the accuracy of the musical sound pitch can be ensured, and the trumpet is suitable for beginner practice and normal use and is simple in structure and convenient to disassemble and assemble.

The cordless handheld device detects and analyzes orofacial activity based on the associated compression or deflection of the teat and oral pressure. The device is capable of receiving and analyzing data that can be used to train the baby to eat.

The invention relates to a combined well mouth testing device for a polymer injection well. A high-precision pressure monitor and a continuous liquid level monitor are connected with a three-way valve in a combination mode, and one combined well mouth testing device is installed on a corresponding pipeline of each polymer injection layer. The invention further relates to a testing method, and the testing method includes the following sequential steps that one combined well mouth testing device is installed on the corresponding pipeline of each polymer injection layer; well mouth pressures and liquid levels of all the polymer injection layers are tested at the same time; bottom hole pressure of the corresponding polymer injection layer is calculated according to testing values of the well mouth pressure and the liquid level of each polymer injection layer; a corresponding pressure monitoring well testing model is selected according to the bottom hole pressure of each polymer injection layer; the bottom hole pressures of all the polymer injection layers and the corresponding pressure monitoring well testing models are fitted respectively to obtain well testing interpretation parameters, and the underground viscosity distribution condition of a polymer solution of the corresponding polymer injection layer is solved inversely. The technical scheme solves the problem that pressure testing data is lost due to single well mouth pressure testing.

The testing desk for measuring the force of the tongs mouth of motorcycle brake comprises the computer and the main body of the testing desk. The main body comprises the mounting rack comprises, the clamping fixture for fixing the handle body, an othering fixture for fixing the tongs mouth on the tested piece and the pump assembly, the actuating unit for driving the handle on the handle body and the push rod pressing on the tongs mouth. The displacement sensor and the handle pressure sensor are setup on the actuating unit. The tongs mouth pressure sensor is setup on the push rod. The signals of the sensors and are input to the computer. The actuating unit simulates braking so as to drive the handle on the tested piece, making the division piston of the pump of the tested piece act. Meanwhile, the computer runs the testing program, which sends the signals detected by sensors to the computer for further processing.