76results about How to "Short closing time" patented technology

An electric plant with a safety device, a method for remedying faults in a switchgear installation, and the use of a closing contact to provide security against faults. The plant includes a switchgear installation, consumer loads connected to the switchgear installation, and at least one feeder cable to the switchgear installation. The plant provides a strong consumer network that still has a high degree of safety against damage caused by short-circuiting faults. The plant includes at least two feeder cables, each connected to its own current source such as a transformer or a generator. At least one of the feeder cables is connected by a branch cable to ground. The branch cable is provided with a closing contact, which is normally open. The closing contact is arranged to be activated, i.e. to quickly close the connection to ground, in the event of short-circuiting in the switchgear installation.

A fuel injector (1), especially an injector for fuel injection systems of internal combustion engines, includes a first solenoid coil (5), which cooperates with the first armature (9), a valve needle (13) in a force-locking connection with the first armature (9) for actuating a valve-closure member (14), which together with a valve seat surface (15) forms a sealing seat, and a second solenoid coil (6). In this context, the first armature (9) is acted upon in a closing direction by a first resetting spring (11). A second armature (10) cooperates with the second solenoid coil (6) such that, when the first solenoid coil (5) and the second solenoid coil (6) are supplied with current, a limit stop body (18) that is connected with the valve needle (13) strikes against the second armature (10).

The invention discloses an intelligent sample collecting device which comprises a machine frame. The machine frame is provided with a feed inlet. A rotatable rotating disc mechanism and multiple sample storage barrels used for collecting samples are arranged in a collecting cavity formed by the machine frame. The sample storage barrels are hung on the rotating disc mechanism. Each sample storage barrel is provided with a hinged barrel cover and an induction locking mechanism used for locking the barrel cover. The hinged position of the barrel cover is provided with an elastic part so that the barrel cover can bounce upwards to be opened when not locked. The feed inlet is provided with a liftable weighing mechanism. The weighing mechanism is provided with an induction unlocking assembly matched with the induction locking mechanism. When the rotating disc mechanism drives the sample storage barrels to rotate to the position below the feed inlet, the weighing mechanism raises to lift up the sample storage barrels, so that the induction locking mechanism induces an unlocking signal of the induction unlocking assembly to open the barrel covers for sample connection and weighing operation. The intelligent sample collecting device has the advantages that the structure is simple and compact, the intelligence degree is high, sample collection and transfer safety is high, sample collection quality precision is high, working efficiency is high, and the production cost is low.

A fuel injector (1) for fuel injection systems of internal combustion engines is constructed of a solenoid (8), an armature (12) which is acted upon in a closing direction by a restoring spring (10), and a valve needle (3) which is frictionally engaged with the armature (12) to actuate a valve-closure member (4) which together with a valve-seat surface (6) forms a sealing seat. In or on the armature (12) at least a first fuel channel (37) is provided through which fuel flows, where the cross-section of the first fuel channel (37) is dependent on the axial position of the armature (12).

An electromechanical valve (1) comprises in a housing (2), a core (3) of magnetic material surrounded by a coil (5) to be supplied with excitation current, a valve seat (6) attached to the housing (2) with a space to said core (3), at least one centrally located outlet port (7) in said valve seat (6) and at least one inlet port (8) communicating via said space, and a valve washer (9) of magnetic material suspended in said to close said outlet port (7) in absence of excitation current to said coil (5), said valve washer (9) cooperating with said core (3) to open said outlet port (7) when excitation current is supplied to said coil (5).

An electronic safety system for the detection of a shaft failure and for the interruption of the energy supply to the shaft includes at least one measuring light guide (13) which is firmly routed in the shaft longitudinal direction, co-rotates with the shaft (1) and is connected to a light source (18) on a light inlet side (14). In the event of a shaft failure, the measuring light guide will break to diminish light transmission therethrough, with the absence of light on a light outlet side (15) being detected by an optical sensor (19) and being used, via evaluation and control electronics (20, 21), as a signal for the shut-off of the further energy supply at a fuel shut-off valve (22). The measuring light guide is fixed to a measuring sleeve (4) attached at both ends to the shaft.

A valve housing 1 with valve seat 10 incorporated in a fluid line features a closing element 2 with a valve disk 11 and a valve stem 12 extending through and sealed in the housing wall which, on the outer side, is locked by means of a locking pin 17 actuated by a solenoid. Owing to the geometry of the valve disk and the annular gap 20 as well as the action of a spring element 23, the inlet-side pressure acting upon the closing element 2 exceeds the outlet-side pressure, as a result of which the fluid flow via the annular gap is interrupted in only a few milliseconds merely by the permanently present, higher mechanical pressure if the valve stem is released merely by the movement of the locking pin effected by a small and lightweight solenoid 18, actuated on the basis of a signal indicating an event.

A fuel injector (1), in particular a fuel injector (1) for fuel injection systems, includes a first solenoid (2) cooperating with an armature (3), a second solenoid (4) cooperating with the armature (3), and a valve needle (13) friction-locked to the armature (3) for actuating a valve closing body, a force being exertable on the armature (3) in a closing direction using the first solenoid (2) and in an opening direction using the second solenoid (4).

The invention discloses a panel structure, which comprises a glass layer, a plurality of first indium tin oxides, a plurality of third indium tin oxides, a liquid crystal layer, a plurality of second indium tin oxides and a plurality of fourth indium tin oxides, wherein the panel structure operates in a grating mode within first preset time; when the panel structure is in the grating mode, the first indium tin oxides receive voltage, and the second indium tin oxides and the fourth indium tin oxides are grounded; the panel structure operates in a touch mode within second preset time; when the panel structure is in the touch mode, the first indium tin oxides sequentially receive driving voltage, and the fourth indium tin oxides are used for touch detection; and the panel structure alternately operates in the grating mode and the touch mode.

The invention belongs to the technical field of safety valves, relates to safety valves for controlling of a fuel gas and oil conveying process, and particularly relates to a driving device and a driving method for a slow-opening quick-closing safety valve. The driving device is characterized in that one end of a lever is respectively connected with the end of a valve rod and a valve rod spring, the other end of the lever is connected with a lever spring and connected with a supporting rod through a roller. One end of a pull rod is connected to the middle of the lever, the other end of the lever is provided with a cylindrical protrusion, one side of the pull rod is provided with a curve cam, the side line of the curve cam is in contacted tangent with the cylindrical protrusion, and a rotary shaft of the curve cam is arranged in a key groove of the pull rod and moves up and down in the key groove along with the rotation of the curve cam. Slow opening is realized by means of the involute type curve cam while quick closing is realized by means of the spring lever principle, a spool can be easily and stably opened only by using a low-power motor to drive the cam, no electromagnetic coil is needed, and no large parts such as cylinders of pneumatic spools and the like is needed. Moreover, the spring is used for driving in closing, valve closing is quick, and the service life of the valve is long.

An adhesive for the wound of the pearl-culturing clam is proportionally prepared from alpha-butyl cyanoacrylate, alpha-isobutyl cyanoacrylate, hydroxymethyl cellulose, phenyldiphenol, and toluenesulfonic acid. Its advantages are short setting time, high water-proofing nature, and low dead rate of clam.

The invention relates to an electric control brake closing and breaking device which comprises a casing, a motor, a variable-speed transmission mechanism and a main shaft, wherein the variable-speed transmission mechanism comprises a plurality of gear shafts which are connected sequentially, the motor is connected with the gear shafts through gears, the gear shafts are connected with an electromagnetic clutch, the electromagnetic clutch is connected with the main shaft, and the electromagnetic clutch can switch the rotation direction of the main shaft; the casing is provided with a circuit board, and the circuit board is connected with the casing through an antivibration pad and a vibration reduction bracket; and the motor is connected with a safety switch. According to the invention, theplurality of gear shafts and the electromagnetic clutch are adopted to form an overrun clutch, and the speed changing, the moment increasing and moment direction transferring are realized; and the motor is connected with the safety switch, and the circuit can be cut off automatically when the motor has an excessive load, thus the motor is protected. The electric control brake closing and breakingdevice has the advantages of simple structure, large output torque, low noise and no need of adjustment during the installation, is connected with the input shaft of a vacuum circuit breaker, is safeand reliable to use, is convenient to operate, and is favorable for realizing the long-distance automatic control of a high-voltage power grid.

The invention discloses a coal mine fire emergency disposal method. The method is characterized in that the method is specific to emergency disposal of a fire in a coal mine tunnel and comprises disposal measures of exogenous fires and disposal measures of spontaneous fires. The method is mainly used for emergency disposal of the fire in the coal mine tunnel.

An electromechanical valve comprises a housing, a core (3') of magnetic material surrounded by a coil to be supplied with excitation current, a valve seat attached to the housing with a space to said core (3'), at least one outlet port in said valve seat and at least one inlet port communicating via said space, and a valve washer (9') of magnetic material arranged in said space. The valve washer is formed by multiple stacked plates (91, 95, 96) that are at least partially displaceable in relation to each other.

The invention provides a vehicle-mounted sun shading, snow blocking and power storing device. A bracket is arranged on a mounting base, and contact switches are mounted on two sides of the bracket; a power taking plate is arranged on the outer side wall of a rotating shaft of the mounting base and is provided with a penetration hole, and a limit contact switch control line slot, bolt holes I connected with a roof and bolt holes II connected with an end cover are formed in a bottom plate of the mounting base; a plurality of blades are mounted sequentially on the rotating shaft of the mounting base, and the bottommost blade is fixed on a lower surface layer of the bracket; the end cover is arranged at the top of the mounting base, a direct current motor is arranged in an inner chamber of the mounting base and is fixed on the end cover after wire connection, and an output shaft of the direct current motor is connected with the topmost blade through a drive plate; a solar panel is attached to the upper surface of each blade and converts solar energy into electric energy; power taken by the power taking plate is stored to a storage battery of a vehicle through a storage wire. The device can be used for sun shading for the vehicle, and the blades can convert the solar energy into the electric energy for storage.

The invention discloses a spherical emergency cut-off valve. A spherical valve element is arranged in an inner cavity of a valve body, a notch is formed in the top of the spherical valve element, and a trapezoidal supporting block with the narrow lower portion and the wide upper portion is arranged in the notch; the inner side of a connecting sleeve is rotationally connected with a driving shaft, the bottom of the driving shaft is in threaded connection with an upper valve rod, a first boss corresponds to the bottom end face of the driving shaft, a limiting rod is fixedly connected to the side wall of the upper valve rod, and the bottom end of the upper valve rod penetrates the valve body to be fixedly connected with the supporting block; and an inverted-L-shaped groove hole is formed in the side wall of the connecting sleeve. When a hand wheel rotates anticlockwise, the driving shaft drives the upper valve rod to ascend, the horizontal section of the inverted-L-shaped groove hole rotates by 90 degrees to reach the other side of the horizontal section of the inverted-L-shaped groove hole, and due to the limiting function of the limiting rod, the driving shaft continues to rotate anticlockwise to drive the upper valve rod to continue to ascend till the bottom end face of the driving shaft and the upper end face of the first boss of the upper valve rod are attached and locked. Otherwise, the rotating driving shaft pushes the upper valve rod to move downwards till the valve is closed.