25 results about "Pneumatic pressure" patented technology

An improved heating system air pressure sensing port. An example aircraft pitot tube heater uses Positive Temperature Coefficient (PTC) switching thermistors arranged to automatically sense the outside air temperature and heat to a design set point temperature. When a high outside air temperature is experienced, the pitot tube will not turn on. The pitot tube heater only turns on below the design set point and will consumes less current than the standard aircraft pitot tube heaters when operating at very cold temperatures. Virtually no current is drawn when the pitot tube increases past the set point, thus reducing the power drain on the aircraft system. The use of multiple thermistors gives the example pitot tube a level of failure redundancy that is not available in current pitot tube heaters.

The invention discloses a method for fracturing a coal seam by employing high-pressure gas. The method comprises the following steps: (1) tipsily drilling from a lower floor roadway of the coal seam to an upper coal seam; (2) inserting three pipes into a drill hole, and injecting polyurethane which is 20-50cm in thickness into the drill hole; (3) injecting cement mortar into the drill hole from a first grouting pipe, and shutting off a first which is arranged at the rear end of the first grouting pipe until the cement mortar overflows from a second grouting pipe; (4) injecting plugging mucilage glue containing particulate matters into the drill hole by virtue of the second grouting pipe after 12-24 hours; (5) injecting a high-pressure gas of which the pressure is 30-60MPa into the drill hole through a fracturing extraction pipe. According to the method disclosed by the invention, the plugging mucilage glue containing particulate matters is pressed into a pore fracture of a rock section under the effect of air pressure; the high-pressure gas is plugged by virtue of the mucilage glue; the problem of air leakage of the high-pressure gas in the coal seam fracturing process is effectively solved; the gas pressure of the fractured coal seam reaches the cracking pressure of the coal seam.

The invention relates to a filter, which comprises a filter shell, wherein the upper part of the filter shell is provided with an air inlet pipe, and the lower part of the filter shell is provided with a blow-off pipe. The filter is characterized in that a filter core is arranged inside the filter shell and comprises an upper supporting plate and a lower supporting plate; a foldable annular filter screen is arranged between the upper supporting plate and the lower supporting plate; an air outlet pipe is arranged on the lower supporting plate; an air outlet end of the air outlet pipe is extended out of the filter shell; the foldable filter screen is arranged between the upper supporting plate and the lower supporting plate; and a filter layer of the filter screen is telescopic. When the filter layer is compressed by the upper supporting plate under pressure, the pore diameter of the filter layer is reduced and the density is increased, so that the filtration precision can be improved. Under the condition of reverse blowing from the air outlet pipe, the air pressure drives the upper supporting plate to restore to the original state; the filter screen is stretched; the filter layer of the filter screen is loosened; and the density of the filter layer is reduced, so that air can easily remove dust on the outer surface of the filter screen, thereby the filter is convenient to use.

The invention provides an environment simulation test case and an environment simulation method. The environment simulation test case comprises a case body forming a work cavity inside, a heat exchanging device communicated with the work cavity via an air inlet and an air outlet to change the temperature of the work cavity, a vacuum generation device communicated with the work cavity via a pumping port to reduce air pressure of the work cavity, an ozone generation device communicated with the work cavity via an ozone outlet to provide ozone air to the work cavity, and a sample installation bench and a ultraviolet radiation lamp set both disposed in the work cavity, wherein samples can be placed on the sample installation bench; and the ultraviolet radiation lamp set can illuminate the sample. The environment simulation test can meet demands for reliability test for near space aerocrafts indoor.

The invention discloses a self-locking pressure signal feedback device which comprises a valve body, a valve cover, a piston, a microswitch and a channel, wherein the piston is provided with a lower piston body and an upper piston body; the valve body is internally provided with a baffle part defining the moving range of the lower piston body; the top of the upper piston body is provided with an exposed section protruding out of the valve cover; a wide-mouth groove internally provided with a ball is formed in the side part of the upper piston body, is perpendicular to the moving direction of the upper piston body and is provided an inclined wall facilitating vertical rolling of the ball; one side of the ball is arranged in the wide-mouth groove, and one side, outside the wide-mouth groove, of the ball is connected with the microswitch through an elastic part; the ball is pushed out of the wide-mouth groove by the upper piston body and outwards extrudes the elastic part when the piston is located at the topmost part; the ball moves into the wide-mouth groove under the counter force of the elastic part when the piston is located at the bottommost part. The device is compact in integral structure and convenient and rapid to install, has a self-locking function, can be reset only by man power after being started and is safe and reliable in operation, and system debugging does not need air pressure starting and can be carried out manually.

The invention discloses a method for improving the performance of a superplastic formed component material. The method comprises the following steps of 1, installing two random electrodes in a formingmold, connecting the two random electrodes to a pulsed power supply to form a conductive path in the area, between the two random electrodes, of a superplastic formed component; 2, putting a plate blank of the superplastic formed component into the forming mold, and starting heating; conducting heat preservation for 10-30 min when the temperature reaches the superplastic forming temperature of the material; turning on an air inlet valve, and introducing argon at the pressure speed of 0.03-0.05 MPa/min; conducting pressure maintaining for 10-30 min to complete superplastic forming when the airpressure reaches the forming pressure intensity; and 3, turning on the pulsed power supply at the voltage of 0-150 V, the frequency of 100-800 Hz and the duration time of 20-60 s. By means of the technical scheme, the hollowing-out size and area can be effectively reduced, and the performance of the component is improved.

An electrostatically atomizing device has a housing and an electrostatically atomizing unit accommodated within the housing. The electrostatically atomizing unit includes an atomizing barrel and an emitter electrode disposed within the atomizing barrel and is configured to atomize water supplied to the emitter electrode at a tip of the emitter electrode and generate mist of charged minute water particles. Formed within the housing is an air pressure chamber which surrounds the atomizing barrel. The atomizing barrel is formed in its peripheral wall with a plurality of air inlets which are arranged circumferentially around the atomizing barrel to introduce pressurized air from the air pressure chamber for carrying the mist on the pressurized air introduced into the atomizing barrel from the plural air inlets and discharging the mist outwardly of the housing.

The invention discloses a gas-type road limit device. The gas-type road limit device comprises a main hollow rectangular shell, wherein a main air storage space is arranged in the center of the main hollow rectangular shell. A plurality of equidistant cylindrical hollow shells are arranged on the upper surface of the main hollow rectangular shell. The center of each cylindrical hollow shell is provided with a secondary air storage space. The gas-type road limit device uses air as a medium to provide a retractable limiting function, and has the characteristics of low cost in use and easy accessto raw materials. In addition, the gas-type road limit device has an air pressure control mechanism and can effectively control the maximum value of the internal air pressure, so as to effectively prevent a motor from burning out in the drive device which is used to provide air due to excessive gas pressure. In addition, the air pressure control mechanism can play a pre-warning role. When the internal air reaches a maximum value, the air pressure control mechanism can send a clear warning effect, thereby reducing the occurrence of power waste, and has high practicality.

The invention relates to an automatic inflatable and deflatable external wind shield and a D-series high-speed train. The automatic inflatable and deflatable external wind shield comprises an inflatable capsule, and the middle part of the inflatable capsule is designed as a foldable fold. The outer windshield further comprises an inflating-deflating and air pressure maintaining control system, wherein the inflating-deflating and air pressure maintaining control system comprises an inflating-deflating device connected with the inflation capsule and a control device electrically connected with the inflating-deflating device. The invention has the advantages of light weight and long service life, can reduce the noise inside the vehicle and improve the comfort degree of passengers riding on the vehicle.

The invention discloses a solidification process device comprising a pneumatic pressure tank, an air pressure applying device and a heat generator, wherein an object to be processed is put in the pneumatic pressure tank; the air pressure applying device is connected with the pneumatic pressure tank and is used for applying air pressure to the pneumatic pressure tank; the heat generator is connected with the pneumatic pressure tank and comprises a hot water pipe and a water supply device, the hot water pipe is arranged in the pneumatic pressure tank, and the water supply device is connected with the hot water pipe. The solidification process device disclosed by the invention has the advantages of easily controlled temperature, safety, reliability and low cost, and is suitable for popularization and application.

The invention relates to a tension stabilizing device and a tension stabilization control method in a horizontal floating mode, and belongs to the technical field of cold rolling strip steel heat treatment. The horizontal floating mode tension stabilizing device is characterized in that a guide portion is arranged on a fixing machine base, a floating base is provided with a connecting portion matched with the guide portion, a buffer roller is rotatably connected with the floating base, strip steel enters an annealing furnace through a front tension roller, a buffer roller and a tension rollerin front of the furnace, a servo air cylinder can drive the floating base to move relative to the fixing machine base in the length direction of the guide portion, and the control assembly is used forcontrolling the working state of the driving assembly. The tension stabilizing device of the horizontal floating mode is used for reference to the principle of a pneumatic spring and is matched witha pneumatic pressure regulating and pressure stabilization automatic servo control system, so that closed-loop adjustment of the tension of the strip steel is realized in a mechanical buffering mode and the tension control precision is improved. According to the tension stabilization control method, the production efficiency is improved, and the requirements of users are met.

The invention discloses an airspeed meter module, which comprises a static pressure outer tube, a dynamic pressure circulation inner tube and a static and dynamic pressure dividing head. The dynamic pressure circulation inner tube is sleeved inside the static pressure outer tube and is fixedly connected with the static and dynamic pressure dividing head, respectively. The static and dynamic pressure dividing head is provided with a static pressure outlet connected with the first end portion of the static pressure outer tube. The static pressure outer tube is connected with an airspeed meter via the static pressure outlet. The second end portion of the static pressure outer tube is provided with an air blockage plug used for preventing the air pressure to enter the static pressure outer tube. Meanwhile, the static and dynamic pressure dividing head is further provided with a dynamic pressure tube through hole in tight connection with the dynamic pressure circulation inner tube. The first end portion of the dynamic pressure circulation inner tube passes through the dynamic pressure tube through hole to be connected with the airspeed meter. The second end portion of the dynamic pressure circulation inner tube passes through the air blockage plug to be communicated with the outside air. The static pressure outer tube is provided with small holes communicated with the outside air. The structure of the airspeed meter module is modular in arrangement, so that the module can be quickly connected with the airspeed meter, wherein the connection operation is simple.

A gas filling system comprises a gas filling device and a wafer box connected with the gas filling device. The gas filling device comprises an inflation component and an exhaustion component, the inflation component is used for filling gas meeting humidity and air pressure requirements into the wafer box when a triggering instruction is received, and the exhaustion component is used for extractingthe gas in the wafer box when the inflation component starts to fill the gas into the wafer box and detecting humidity value and temperature value of extracted gas, and the humidity value and the temperature value of the gas correspond to a relative humidity value of the gas; when the relative humidity value of the gas is equal to a preset relative humidity value, the inflation component stops filling the water box, and the exhaust box stops gas extraction from the wafer box.

The invention relates to a screw compressor directly driven by a turbine and a driving method, belongs to the field of mechanical control and particularly relates to mechanical equipment of a screw compressor directly driven by a turbine and a control method. The driving method comprises the following steps: connecting the driving turbine with the screw compressor through a coupler; with a rotating speed sensor, monitoring the rotating speed at the mechanical output end of the driving turbine and the air pressure of the output end of the screw compressor; and feeding back to a steam inlet of the driving turbine to directly drive the screw compressor by the turbine. According to the screw compressor directly driven by the turbine and the driving method, not only can energy resources be saved, but also the cost can be lowered.

A manual fogging device for high-voltage salt fog test relates to the technical field of recycling equipment to extract high-potassium microparticle mixed fertilizer. The manual fogging device for high-voltage salt fog test is structurally characterized in that hanging ropes are hung to a cross beam, a frame is fixed to the cross beam via the hanging ropes, a weight is fixed to the bottom of the frame via ropes, the frame and the ropes are covered with rain cloth, a nozzle is arranged in the frame, the rear end of the nozzle is communicated with a pressure system through an air duct, and a side fog inlet of the nozzle is communicated with a water tank via a water pipe. The manual fogging device for high-voltage salt fog test has the advantages that the manual fogging device for high-voltage salt fog test has good high-voltage test insulation and can be precisely adjusted, and a fogging function for quick setup in a limited area can be achieved.

The invention provides a steam change demonstration teaching aid. For the demonstration teaching aid used by schools, a concave hole capable of containing a steaming pot is formed in one side of the upper portion of a rectangular bracket, a detachable water bottle is arranged on the other side of the rectangular bracket, a passage tube for communication is arranged between the steaming pot and thewater bottle, and a bottom plate for placing a heating stove is arranged on the bracket below the steaming pot. In the teaching use process, steam can be generated by heating water in the steaming pot above the heating stove, when the steam volatilizes continuously, and the water in the stove is intermittently lowered to be lower than the water level of a bottle opening of the water bottle, underthe pressure effect of the outside air, air is squeezed into the passage tube from an opening of the passage tube and the bottle from the bottle opening of the water bottle, the air pressure and water pressure in the bottle make the water squeezed into the stove, the water bottle on the side can supplement cold water continuously, and in this way, the processes of steam generation and volatilization and cold water supplementing under the action of the air pressure and water pressure can be demonstrated for students.

The invention discloses a construction steel bar machining device which comprises a frame. A transverse frame is horizontally mounted at one end of the inner part of the frame, a sliding frame is slidably mounted on the outer side of the transverse frame, a sliding seat is slidably mounted on the outer side of the sliding frame, a mounting frame is mounted on the outer side of the sliding seat, and a first pneumatic pressure rod is horizontally mounted at the bottom of the mounting frame. The second pneumatic pressure rod works and extends to drive a translation frame to slide on a second sliding rail, at the moment, a roller moves along a limiting piece, when the roller moves to a lifting plate, a placing frame rotates on a rotating shaft through a bearing seat, at the moment, one end ofa steel bar penetrates through a discharging groove to be in contact with the top side of the lifting plate and continuously moves along with the placing frame, the steel bar extends out continuouslyfrom the inner part of the discharging groove, when the placing frame moves to the bottom end of the limiting piece, the steel bar automatically falls into a hopper, at the moment, the second pneumatic pressure rod contracts to return to the original position, the automatic discharging operation of the steel bar is rapidly and conveniently completed, and the condition that the steel bar is damageddue to direct discharging is avoided.

The invention discloses a clamping device and a hydraulic clamping device and relates to the technical field of clamps. The clamping device comprises a base body, a sliding sleeve, clamping slips anda fixing taper jacket. The base body is internally provided with a movable cavity. The sliding sleeve is slidably arranged inside the movable cavity. A plurality of clamping slips are movably arrangedin a transmission space, and every two adjacent clamping slips are elastically connected. The plurality of clamping slips are in transmission connection with the sliding sleeve. The inner wall, closeto the clamping slips, of the fixing taper jacket is provided with a taper surface which is inclined in a direction from a first end to a second end; and the outer walls of the clamping slips lean against the taper surface. The clamping device differs from an existing clamp and can be used for effectively clamping a clamped part by using hydraulic pressure or air pressure as power.