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The invention relates to a high-speed electromagnetic valve driver circuit. An input signal buffer unit mainly performs buffering shaping on an input signal from an external central control unit and improves the antijamming capacity thereof; a high side current detection unit realizes current detection by detecting differential voltage of one resistor in a load branch circuit; a PWM signal generator mainly generates a PWM wave with fixed frequency, the current is controlled and kept by regulating the duty cycle of the waveform; a power drive unit mainly supplies enough power drive for a power NMOS tube so that the power NMOS tube can fully operate in a switch state and reduce switch loss and heating; a signal time delay unit outputs a time delay for a current detection signal; in the delay time, the power NMOS tube is cut off, so that a coil can have afterflow; a logical gate circuit unit is a coincidence gate and generates a synchronizing signal required by the PWM signal generator after performing phasing on the current detection signal and a time delay signal thereof.

A condensation dryer includes a drying chamber for objects to be dried, a process air channel, a heater in the process air channel for heating the process air, a heat exchanger in the process air channel for cooling the process air after passing through the drying chamber, a fan in the process air channel for conveying the process air, a rinsing container connected to a water supply, and a controller.

A container has a body which comprises front and rear walls, and the side walls. Each of the front and rear walls has an elliptic cross section, and is provided with a lateral recess. Each of the side walls is a vertical plane which intersects the elliptic cross section of the front and rear walls, and is provided with a plurality of reinforcements.The container has a bottom which comprises a peripheral wall connected to the body and a bottom wall. The peripheral wall comprises slightly inclined front and rear walls, and side walls inclined by a predetermined angle. The peripheral wall is provided with a reinforcing rib.

A control valve according to an exemplary embodiment includes an interlocking mechanism that achieves a first operation and a second operation simultaneously or continuously. In the first operation, a sub-valve is opened by having an actuating rod displaced integrally with a sub-valve element in accordance with the magnitude of solenoidal force. In the second operation, a load, by which to bias a main valve element in a closing direction of a main valve, is increased by displacing the actuating rod relative to the main valve element.

The invention relates to a high-reliability landing gear control system. The high-reliability landing gear control system comprises a control driving unit and an EMAC driving circuit, wherein the control driving circuit comprises a power supply transformation power distribution module, a 1553B bus interface module, a CPU processing unit, a steering motor driving circuit, a solenoid valve driving circuit and an analog quantity signal processing circuit, wherein the CPU processing unit comprises a taking-up and releasing control module, a front wheel steering control module and an anti-skid braking driving control module; the landing gear control system adopts a driving and control integrated design, the CPU processing unit can be used for achieving combined control on taking up and releasing of a landing gear and a cabin door, the steering of a front wheel, and the anti-skid braking of an electro-mechanical actuator of a main engine wheel, and the system is light in weight, low in power consumption, high in reliability and good in environment adaptation, and can be widely applied to novel spacecraft landing recovery systems and traditional aircraft landing gear systems.

The invention discloses a boxing machine paper box opening method. A rotary table is driven through a servo motor, a cam plate is provided with double cam grooves including the outer cam groove and the inner cam groove, the outer cam groove is used for controlling operation actions of a suction nozzle of a box opening rod assembly, the inner cam groove is used for controlling operation actions of a suction nozzle of a box taking rod assembly, then box absorbing and box placing actions of the box taking rod assembly can be finished, and the paper box opening function is finished through the box opening rod assembly. The invention further discloses a paper box opening mechanism. The paper box opening mechanism comprises a rotary table assembly, a servo motor assembly, the box opening rod assembly with the suction nozzle, a box opening driving tooth block assembly, the box taking rod assembly with the suction nozzle and a box taking driving tooth block assembly. According to the boxing machine paper box opening method and the paper box opening mechanism, working is reliable, cost can be effectively reduced, a paper box can be opened more reliably, the running speed is high, the paper box opening mechanism is simple in structure, and the working control process is simple.

A multicylinder internal combustion engine is provided with a plurality of cylinders sharing a single crankshaft. The combustion characteristics in the respective cylinders is improved by taking out part of combustion (expansion) gas produced in one of the cylinders at an earlier stage of the explosion (expansion) stroke, and then introducing the gas into another one of the cylinders in the suction or compression stroke.

The invention discloses a mechanical dry gas sealing device for pumps. The mechanical dry gas sealing device comprises a movable ring component and a fixed ring component, wherein the movable ring component comprises a spring box (1), a stopper screw (2), a spring (3), a sealing ring (4), a pushing ring (5), a snap spring (6) and a movable ring (7), and the fixed ring component comprises a fixed ring (12), an anti-rotating pin (9), a sealing ring (11) and a gland (8). The mechanical dry gas sealing device is characterized in that the sliding sealing ring (4) is mounted in a seam allowance groove (50) on the inner diameter of the front end of the pushing ring (5), the pushing ring (5) is in close fit with the rear end face (70) of the movable ring (7), and compression rate of the O-shaped sliding sealing ring (4) ranges from 2% to 5%. A sealing end face of the movable ring (7) of a compensation ring is a conical surface. A boss (83) is arranged on the inner diameter of a vertical end face (82) mounting a seam allowance groove (80) of the fixed ring (12) and is matched with the inner diameter of the inner end face of the fixed ring (12) in a support manner. An end face of the compensation ring of the mechanical dry gas sealing device is good in adherence. Besides, the mechanical dry gas sealing device is stable to run, high in interference resistance, good in sealing performance and suitable for diversified working conditions.

In a reclosable bag (20) a zipper (Z) is provided on the inner surfaces (50) of the plastic film and the two parts of the zipper (Z) are fixed on the opposite inner surfaces (50) of the bag (20), wherein the zipper (Z) is connected to the inner surface (50) of the plastic film in such a manner that between the welded regions (12, 14) between the zipper (Z) and the inner surface (50) of the plastic film, recesses (15, 13) are left free in the longitudinal direction of the zipper (Z) to form a seal-free longitudinal channel and in the transverse direction of the zipper (Z) to produce free air or steam passage openings at defined distances between the zipper (Z) and the inner surface (50), through which openings a passage of steam is possible, wherein ends of the openings facing the interior (60) of the bag (20) are larger than ends of the openings facing the exterior (70) of the bag (20).

The invention relates to a friction clutch, at least comprising a clutch housing having a pressure plate that can be displaced thereon non-rotatably and axially limited, wherein said pressure plate can be subjected by a lever system supported on the clutch housing to a contact force that is counter to the effect of energy accumulators acting between the clutch housing and the pressure plate with respect to a pressure plate fixed on the cover, while tensioning the friction linings of a clutch plate. To this end, wear of the friction linings is compensated for in that a resulting first distance between the pressure plate and lever system is compensated for by way of a rotation of a ramp system, which is disposed between the pressure plate and lever system, using a rotational device if, while the pressure plate is subjected to a maximum force by the lever system, a second predetermined distance is determined between the pressure plate and clutch housing, said second distance exceeding a predetermined value, and a rotation occurs during an alleviation of the pressure plate by the lever system and a displacement of the pressure plate occurs by means of the energy accumulators active between the pressure plate and the clutch housing.

The invention discloses an elevator brake control system and a control method. According to the scheme, a power supply regulation circuit is adopted to regulate input PN voltage into direct current voltage required by elevator brake control through closed-loop control, and current change required by elevator brake control can be controlled according to demands; meanwhile, a switch circuit is matched with the power supply regulation circuit, and the switching of current regulated through the power supply regulation circuit is controlled, so that a brake power supply is shut off. The brake control scheme replaces the traditional brake power supply and brake contactor, reduces the cost, eliminates the noise produced during the operation of the contactor, improves the reliability of circuits, reduces the quantity of maintenance points, can control the operation process of a brake through current control, reduces the noise produced during the operation of the brake, and cancels continuous current circuits at two terminals of a brake coil.

The invention discloses an automatic urinary catheterization system. Closing of a urinary catheterization tube can be automatically controlled according to changing of urine pressure of a human body, automatic urination is realized, the control precision is high, individual control can be realized according to different patients and the current postures of the patients, and the normal bladder functions of a patient are guaranteed to the great extent. In order to precisely and automatically control an automatic urination process, an initial value processing unit, a signal processing unit, a urination threshold value setting unit, a urination channel control unit and an early warning unit are arranged in a control unit of the system; and moreover, an end of a catheter with an electronic liquid draining valve is connected with an intelligent urine volume measuring unit. The initial value processing unit is used for setting initial values of a pressure sensor unit; the signal processing unit is used for processing signals of an acquired value of the pressure sensor unit; the acquired value is compared with a urination threshold value set in the urination threshold value setting unit; and when the acquired value reaches the urination threshold value, a urination channel is opened by using the urination channel control unit.

In a build-up step, a plurality of resin insulation layers and a plurality of conductive layers are alternately laminated in multilayer arrangement on a metal foil separably laminated on a side of a base material, thereby forming a wiring laminate portion. In a drilling step, a plurality of openings are formed in an outermost resin insulation layer through laser drilling so as to expose connection terminals. Subsequently, in a desmear step, smears from inside the openings are removed. In a base-material removing step performed after the build-up step, the base material is removed and the metal foil is exposed.

Valve element (10), comprising a main body, at least one inlet (101) and at least one outlet (102), a passage connecting the inlet and outlet, at least one burst disk (rupture disk) (13) or equivalent, which, when unbroken, closes the passage from inlet to outlet, and a piston element (15) provided with a piercing element (14) or the like for piercing the burst disk. The piston element (15) is provided with a passage (17) for a pressure medium, said passage extending axially through the piston element from one first side to one second side, that the piston element is provided with a second burst disk or equivalent which, when unbroken, closes the passage (17) provided in the piston element.

The invention discloses a compound PWM control method of a high-speed switching valve. The compound PWM control method of the high-speed switching valve is characterized in that the operation processof a valve core of the high-speed switching valve is defined as four stages which comprise a valve core opening stage, a valve core maximum opening maintaining stage, a valve core closing stage and avalve core closing and maintaining stage; in the valve core opening stage, the valve core is reliably opened by controlling the duty ratio of excitation PWM; during the valve core maximum opening maintaining stage, coil current is at an optimal value by controlling the duty ratio of high-frequency PWM, and the lowest power loss of a coil is ensured; and during the valve core closing stage, the coil current unloading is accelerated by controlling the duty ratio of reverse PWM, and valve core closing time is shortened. According to the compound PWM control method of the high-speed switching valve, a compound PWM signal is similar to a conventional PWM signal, the signal is only output through a hardware digital port, and the compound PWM control method of the high-speed switching valve has the advantages of high response, low power consumption and low cost.

Provided is an emergency parachute landing gear for a multi-rotor unmanned aerial vehicle. The device comprises a parachute cabin, a parachute cabin cover and an open-parachute-device, the opening of the upper end of the parachute cabin is provided with the parachute cabin cover, a folded parachute is arranged in the parachute cabin, the top of the parachute is connected to the parachute cabin cover, and the open-parachute-device is arranged in the parachute cabin, and is used for pushing the parachute cabin cover to be separated from the parachute cabin so as to drive the folded parachute to be pulled out of the parachute cabin and straightened. The emergency parachute landing gear for the multi-rotor unmanned aerial vehicle can directly pull out and straighten the parachute, and is suitable for various parachute cabin shapes, the parachute opening reliability is high, the safety is high, and the cost is low.

The invention discloses an intelligent controller of a bistable permanent-magnet vacuum circuit breaker and belongs to the technical field of intelligent low-voltage apparatus. The intelligent controller comprises a microprocessor, an isolating driving module, a switching-on / off brake coil driving module, a power supply failure detection module, a power supply voltage range detection module, a switching power supply module, a switching-on / off brake capacitor charging module, a switching-on / off brake capacitor charging current detection module and a power failure maintenance module. By the aid of the intelligent controller, constant-current charging of a switching-on / off brake capacitor is achieved, the service life of the capacitor is prolonged, simultaneously, a circuit of the power failure maintenance module and a circuit of the power supply failure detection module in the intelligent controller can guarantee the effective utilization of energy and the reliable switching-off of a circuit breaker under the power failure condition, circuits are simplified, the reliability of the whole intelligent controller is further improved, and the safety of power supply is guaranteed.

A fuel introduction member is connected to an open end of a siphon tube which constitutes a part of a fuel tank. The fuel introduction member is provided with an opening through which a fuel is introduced from the tank into the siphon tube and from the siphon into the tank, a lid portion which is swung by the hydraulic pressure from the siphon tube so as to open the opening, and a float member which floats on the fuel in accordance with the rise of a fuel liquid surface in the tank to displace the lid portion in order to open the opening.

The invention discloses a low-impact overall ejection type launching canister front cover and belongs to the technical field of rocket and missile launching. The low-impact overall ejection type launching canister front cover comprises a movable impact part, an energy storage spring, fixing fulcrum bars, pull bars, fixing locking rings, locking tongue pieces, a front cover body and a fixed support. The fixed support is fixed to the center of the front cover body. A hollow pipe of the movable impact part and a guide bar of the fixed support are in hole and shaft fit. The outer surface of the hollow pipe of the movable impact part and the outer surface of the guide bar of the fixed support are sleeved with the energy storage spring. One end of each fixing fulcrum bar is fixed to a flat plate of the movable impact part. One end of each pull bar is movably connected to the other end of the corresponding fixing fulcrum bar. Each locking tongue piece is movably connected to the other end of the corresponding pull bar. The fixing locking rings are fixed to flanges of a launching canister body. The front cover body is installed at the open end of the launching canister body through the cooperation of the locking tongue pieces and the fixing locking rings. The launching canister front cover can be effectively sealed and reliably opened and safely disengage.

The invention provides a wheel for an amphibious vehicle. The wheel can solve the problems of complicated assembly structure between a paddling impeller and a wheel hub, small displacement of the paddling impeller and low traveling speed of the vehicle on the water of a conventional wheel structure of the conventional amphibious vehicle. The wheel comprises a wheel hub, a hub motor and a tire, wherein the tire is mounted on the periphery of a rim of the wheel hub, the hub motor is mounted on the inner side of the wheel hub coaxially, and a sliding shaft is mounted in a central axle hole of the wheel hub in a sliding manner, water paddle blades are rotationally mounted on the outside end surface of the wheel hub through spring hinges and can be perpendicular to the outside end surface of the wheel hub or attached to the end surface of the wheel hub; the outside end part of the sliding shaft is matched with the water paddle blades when the sliding shaft slides outwards from the central axle hole, and accordingly, the water paddle blades are pushed to be turned outwards, opened and perpendicular to the outside end surface of the wheel hub.

The invention relates to a tool for grouting in a loose coal seam section during drilling, which comprises a one-way valve, a valve seat, a ratchet wheel control mechanism, a shell and a nozzle. A tray shaft is arranged in a tray shaft hole, a valve spring, a tray and a rubber pad are limited on the tray shaft through a valve nut; the ratchet wheel control mechanism comprises a ratchet wheel spring, a sliding plate, a rotating plate and a fixed slot, the two sides of the sliding plate are provided with the ratchet wheel spring and the rotating plate, and the end faces of the sliding plate and the rotating plate have the same diameter and are provided with three through holes with the same design; when control signals are not executed, the fixed slot is sleeved outside the valve seat and the rotating plate, and a fixed slot bulge is arranged on the fixed slot and is clamped in a short slot in a sleeve for positioning in the sleeve; and the shell comprises a short drill bit joint and the sleeve, and the nozzle is arranged on the outer wall of the sleeve. The two ends of the shell are connected with a drill bit and a drill stem through pipe threads and are provided with a sealing ring. The grouting tool has a simple structure, normal drilling and grouting type drilling can be achieved via mechanical signal transmission and control, and the tool can be used safely and reliably and is suitable for drilling of loose sections after gas exploration in underground coal seams and also other under-balanced drilling projects.

A butterfly valve for a turbocharger system in which the leak path through the valve is controlled by keeping the clearance between either a shaft of the valve and two bushings small or the clearance between the bushings and the counter bores in the valve element small, and making the other clearance larger.