44results about How to "Guaranteed constant pressure" patented technology

A process for continuously preparing nano powder by deposition method includes quantiatively and proportionally feeding raw materials in reactor at a certain speed, stirring while nucleating reaction, quickly coming in crystal nuclear growing tube, moving forward under the action of mixer, collecting suspension at tube end, and drying. Its advantages are controllable granularity, high dispersity and uniformity, and high productivity.

The invention discloses a micro-foaming injection-molded screw, which mainly comprises a rear screw, a rear positioning ring, a rear non-return ring, a rear mixing section, a front mixing section, a front screw, a front positioning ring, a front non-return ring, and a screw head; the rear mixing section and the front mixing section has skewed slot barriers; a left and a right ends of the mixing sections are provided alternately with four charging troughs and discharging troughs; ribs between the charging and discharging skewed slots have a length less than the diameter of the mixing sections;the rear mixing section adopts a positive skewed slot with the same rotation direction as the screw, and the front mixing section adopts a reverse skewed slot. The screw has greatly improved mixing homogenization effect, and allows supercritical gas to distribute rapidly and uniformly in polymer melt so as to form a stable polymer melt / supercritical gas homogeneous system; meanwhile, a non-return ring is used at the air-inlet position, which can effectively prevent the obstruction of the air-inlet channel due to melt reflux; the novel micro-foamed injection-molded screw is widely applicableto various micro-foaming injection machines.

The invention discloses a macro-micro composite constant-pressure polishing device and method. The method comprises the following steps of adjusting the polishing pressure by using a lever structure,counterweights at the two ends of a lever, and the force arm changes of the lever; when polishing equipment is used for polishing processing on the surface of a rotating symmetric non-spherical die core, the polishing position is controlled by using a left and right moving shaft and a rotating swinging shaft, the position of a die core polishing point is kept unchanged in space by utilizing a lifting servo shaft in space, and the polishing pressure is kept stable in the macro perspective by combining a lever principle. A polishing head is provided with a pressure sensor and an electromagneticforce device. The electromagnetic force device is controlled by polishing pressure changes to adjust and compensate for polishing pressure changes in the micro perspective. Constant pressure is ensured in the polishing process through closed-loop control. By means of the macro-micro composite constant-pressure polishing device and the method, the stability of polishing pressure is kept through a macro-micro composite method, and the control precision is higher.

The invention discloses an intelligent double-control rapid paint sprayer which comprises an air inlet thermometer, an air outlet thermometer, a barometer, an electric turbine speed governing rotary knob, a main switch, an electric turbine switch, an air filter, an air inlet heater, an air pressure sensor, an air outlet, an air outlet electromagnetic valve, an air leakage water draining electromagnetic valve, an air cylinder, an electric turbine, a controller, an AC-DC and a storage battery. The intelligent double-control rapid paint sprayer is reasonable in design, compact in structure, simple in operation and high in adaptability and intelligent level, can be controlled in a remote manner, can effectively improve the paint spraying operation efficiency, is high in paint utilization ratio and low in environmental pollution and does not generate an oil molecule; and the air inlet temperature can be heated for the first time through the heater, so that paint flash-off is accelerated, moisture in the air is removed, and constant temperature is ensured.

The invention relates to an inner storage constant-pressure preparative column device, and provides a miniaturization device. The device comprises a bracket, a preparative column and a hydraulic cylinder. The hydraulic cylinder is vertically mounted on the bracket, and a U notch for fixing the preparative column is arranged at a distance under the hydraulic cylinder; and the hydraulic cylinder acts on the preparative column and drives the preparative column to compress. The preparative column has functions of automatic inner column pressure compensation and automatic column bed defect repair, and also can ensure constant pressure state of packing in the column. The device is especially suitable for development and research on different target products and different processes in a laboratory, so as to greatly reduce development costs, and improve development efficiency.

The invention discloses an automatic sampling device of leather colour fastness. The automatic sampling device comprises a chain, wherein the chain is driven to rotate on a level through a driving gear and a driven gear; the chain is fixedly connected with a fixing strip through a connecting shaft, and the fixing strip is connected with a rotating shaft; the rotating shaft is connected with a linear slide rail structure capable of linear movement; the linear slide rail structure is connected with a connector, and the connector performs the straight reciprocating motion; the connector is connected with a solid sampler, and the lower part of the solid sampler is provided with a platform for testing the leather colour fastness, wherein the platform includes a bottom plate; both ends of the bottom plate are connected with pressing plates through a spring clip. The automatic sampling device solves the problems in the prior art that the noise during the reciprocating linear frictional sampling process is big and the service life of the device is influenced for the motor load output torque is always under the heterogeneous changing state.

The invention provides a track plate spiral rib sleeve installing machine. The track plate spiral rib sleeve installing machine comprises guide rails, truss cross beams, a sleeve mounting assembly, transverse moving guide rails and transverse moving motors; the sleeve mounting assembly can move along the transverse moving guide rails on each truss cross beam; the sleeve mounting assembly compriseslifting mechanisms, a cross rod, pressing air cylinders and suckers, and the lifting mechanisms can drive the cross rod to ascend and descend; and a plurality of pressing air cylinders are arranged on the cross rod, and telescopic rods of pressing air cylinders are connected with the suckers capable of sucking spiral rib sleeves. According to the track plate spiral rib sleeve installing machine,the truss cross beams are driven by moving motors to move on the guide rails, the sleeve mounting assembly is driven by the transverse moving motors to move on the transverse moving guide rails, so that the sleeve mounting assembly can move to the position above positioning columns of different columns on a mold, the suckers capable of sucking the sleeves are driven by lifting motors to perform lifting motion, so that the sleeves are accurately placed on the positioning columns; and after the sleeves are placed on the positioning columns, the pressing air cylinders are started to press the sleeves against the positioning columns, so that the problem of high failure rate of manual installation of the spiral rib sleeves is solved.

The invention discloses a cotton picker fire monitoring system. The system comprises a cotton picker main body, a cab, a cotton box, an air duct, a fire extinguishing device (containing a filter, an air pump, a one-way valve, an air vessel, an overflow valve, a pressure gauge, a fire extinguishing agent vessel and electromagnetic valves), a smoke sensor, temperature sensors and a near infrared sensor, wherein the fire extinguishing device is fixedly mounted between the cab and the cotton box on the cotton picker main body and positioned under the air duct; the smoke sensor and the temperaturesensors are mounted in the cotton box, and the near infrared sensor is mounted in the air duct. The fire extinguishing device is connected with the air duct through a pipeline; only certain treatmentneeds to be carried out on the air duct of the cotton picker, and then the preset function is easily realized. When a fire occurs, the sensors transmit signals to the corresponding electromagnetic valve, then the electromagnetic valve is started, and the fire extinguishing agent is pressed into the air duct by utilizing the pressure difference formed between the air duct and the fire extinguishingdevice and then reaches the cotton box along with wind, so that the purpose of isolating ignited cotton from unignited cotton in the cotton box is achieved, a great deal of time is gained for the cotton picker to shut down for unloading the cotton and extinguishing the fire, and the economic loss is reduced for farmers and machine owners.

The invention relates to a unit type glass curtain wall system, and relates to the field of glass curtain walls. The unit type glass curtain wall system comprises glass curtain plates and a hidden frame keel, wherein the hidden frame keel is horizontally and fixedly arranged between the back parts of the two glass curtain plates in the longitudinal direction; one side, deviating from the glass curtain plates, of the hidden frame keel is fixedly connected with a wall body; baffle plates are arranged at the two sides of the hidden frame keel; the inner walls of the two baffle plates are in butt joint with the two sides of the glass curtain plates; the inside of the hidden frame keel is of a hollow structure to form an equal-pressure cavity; and the equal-pressure cavity communicates with a seam position between the upper and lower glass curtain plates. The unit type glass curtain wall system has the effect of reducing the water seepage problem in the seam position of the glass curtain plates.