11results about How to "Achieve relief" patented technology

The invention discloses a low-field nuclear magnetic resonance exploration device and method capable of effectively shortening dead zone time, and relates to the field of electric signal acquisition, and the device comprises an upper computer which is used for communicating with a main control circuit; the main control circuit is used for controlling and collecting the core and comprehensively controlling the work of the device; the power amplification circuit is used for amplifying the power signal input by the main control circuit and then transmitting an alternating current pulse to excite the coil; the beneficial effects of the invention are that the coil employs a transmit-receive integrated differential structure, which inhibits common-mode noise interference and improves the signal-to-noise ratio of detection; the Q-conversion circuit reduces the quality factor of the coil through parallel connection of energy discharge resistors at the two ends of the coil, the purpose of rapidly discharging energy stored in the coil is achieved, and the dead time can be effectively shortened; the high-isolation fast-switching radio frequency switch can effectively reduce the insertion loss and the generated noise, significantly reduce the switching time, further shorten the dead zone time, and improve the detection effect of a short relaxation target body.

The invention relates to the technical field of ball valves, and discloses a two-way sealing structure for a large-diameter ball valve, the two-way sealing structure is symmetrically arranged on the water inlet side and the water outlet side of the ball valve, the ball valve comprises a valve body and a ball core arranged in an inner cavity of the valve body, and the two-way sealing structure comprises valve seats movably arranged on the water inlet side and the water outlet side of the ball core; a main sealing seat is arranged on the side, close to the ball core, of the valve seat, a flange is movably connected to the side, away from the ball core, of the valve seat through a spring, a small piston is movably embedded among the flange, the valve seat and the ball core, a valve cavity is formed among the small piston, the flange and the ball core, a gap is formed among the small piston, the valve seat and the flange, and a first channel is formed between the valve seat and the ball core. The flange is provided with a second channel communicated with the valve cavity and the inner cavity of the valve body, and the small piston is provided with a third channel communicated with the valve cavity and the gap. Two-way sealing of the water inlet side and the water outlet side of the ball valve can be achieved, the sealing performance is greatly improved, and the application scene is greatly widened.

The utility model relates to the technical field of electronic circuits, and provides an energy storage equipment grid connection device and an energy storage system. An energy storage equipment grid connection device comprises an energy storage converter and a power-on preparation module. Wherein the energy storage converter is used for being connected with a power grid, and the power-on preparation module is connected with the energy storage converter through a direct-current bus. The power-on preparation module comprises a connection bus, a power-on switch, a slow charging branch, a voltage-sharing circuit, N interface units and a control unit. And the control unit is respectively connected with the power-on switch and the slow charging branch. The control unit can be used for controlling the slow charging branch to be switched on and controlling the power-on switch to be switched off at the same time, so that electric energy of the energy storage equipment can be discharged by the voltage-sharing circuit. When the pressure difference between at least two pieces of energy storage equipment is large, the energy storage equipment grid-connected device can discharge the electric energy of the energy storage equipment. And an implementation basis is provided for the energy storage equipment grid connection device to connect all the energy storage equipment into a power grid, so that the application range of the energy storage equipment grid connection device is expanded.

The utility model relates to the field of water conservancy equipment, and discloses an ecological flow automatic adjusting and discharging device which comprises a gate frame, a gate plate is arranged in the gate frame, an automatic adjusting mechanism connected with the gate plate is arranged on the top face of the gate frame, and a mounting shell is fixedly mounted on the top face of the gate frame. When the small gear rotates, the two adjusting rods can be driven by the racks to move in the opposite directions, the two ultrasonic water level gauges can be conveniently adjusted to proper positions so as to monitor the water levels of the upstream and the downstream of the gate, and when a person reversely rotates the small gear, the two ultrasonic water level gauges can be close to each other so as to monitor the water level of the gate. And through the arranged control box body, the water flow meter, the ultrasonic water level gauge and the screw hoist, the operation mode of the gate can be intelligently adjusted in a linkage mode in the non-flood season and the flood season so as to ensure that the instantaneous water level change can be coped with in time, and automatic adjustment and discharge of the ecological flow can be achieved.

The invention discloses a hydrogen filling, loading and unloading integrated column which comprises a filling pipeline, an outlet of the filling pipeline is connected with a hydrogen inlet b through a filling hose, and a manual ball valve, a first manual ball valve, a first one-way valve, a first pneumatic ball valve, a first filter, a first flowmeter and a third manual ball valve are sequentially mounted on the filling hose; an inlet of the hydrogen unloading pipeline is connected with one end of a hydrogen unloading hose of the hydrogen unloading column, and the other end of the hydrogen unloading hose is connected with a hydrogen outlet b through a fourth manual ball valve, a second filter, a second one-way valve, a second pneumatic ball valve, a first flow meter and a third manual ball valve in sequence; the first flow meter and the third manual ball valve are shared by a filling pipeline and a hydrogen discharging pipeline, and an inlet b of the filling pipeline is an outlet b of the hydrogen discharging pipeline. Functions of a hydrogenation system and a hydrogen discharging system are integrated on the integrated equipment, and the single equipment can realize filling and discharging of hydrogen in a hydrogen tube bundle vehicle; hydrogenation and hydrogen unloading functions can be simultaneously met by adopting a single flow meter and a single safety valve.

The utility model provides a round-head multi-side-hole releasing and filling needle head which comprises a needle head sleeve, a needle head body is arranged on the needle head sleeve, a round head portion is arranged at the end of the needle head body, needle head side holes are formed in the needle head body, needle head scale marks are arranged on the needle head body, and the needle head body is a round-head single-side-hole needle head with the diameter range of 0.1 mm to 0.3 mm and the diameter range of 0.3 mm. The needle head is a round-head single-side hole, the length of the round-head single-side hole ranges from 0.5 cm to 15 cm, the diameter of the round-head multi-side hole ranges from 0.1 mm to 12 mm, damage to skin tissue can be reduced through the round head, and operation risks are reduced. Original tissue is not damaged due to the design of the needle head side hole, and the completeness of the skin can be protected. Each scale on the needle head is 10mm, so that the needle insertion depth is easy to control, and the needle head can realize the release and filling of the skin at the same time, thereby meeting various requirements in plastic surgery and beauty treatment processes.

The utility model discloses a hopper elevator convenient to hopper dismounting, including conveying frame and the conveying mechanism of being connected in conveying frame, the conveying mechanism is including motor, conveying belt, the motor is used for driving conveying belt operation, the conveying belt is provided with a plurality of hoppers, the bottom of hopper is connected with the connecting plate, the connecting plate is matched with the connecting seat of being connected in conveying belt, the connecting seat is connected with the positioning mechanism for the positioning of connecting plate, the both sides of connecting plate are provided with the connecting groove, the positioning mechanism links with connecting groove. The utility model can improve the stability that connecting plate links with connecting seat, namely hopper links with conveying belt steady, realizes to hopper quick installation, and the tension of exerting to U shape draw plate, and pulls two tooth plate synchronous movement, and the rotation of tooth plate drive gear, and synchronous belt drive positioning plate rotation, makes positioning plate end and corresponding connecting groove separate, realizes to connecting plate unfasten, and the convenient dismounting of hopper, high efficiency.

This disclosure provides an airborne transient electromagnetic equal-amplitude in-phase parallel transmitter system, including a power management unit for power supply; a full-bridge inverter circuit unit, including multiple parallel MOSFET full-bridge inverter modules, each MOSFET full-bridge inverter module emitting equal-amplitude in-phase bipolar parallel current pulses to its connected transmitting load, so that each transmitting load generates an equal-amplitude in-phase electromagnetic field, and the equal-amplitude in-phase electromagnetic fields are superimposed and act together on the target under test; an active adaptive adjustable voltage dual clamping unit, connected to the full-bridge inverter circuit unit, for clamping the rising and falling edges of each sub-pulse in the equal-amplitude in-phase bipolar parallel current pulse; a control unit for generating PWM timing logic control signals to control the full-bridge inverter circuit unit, so that each MOSFET full-bridge inverter module outputs an equal-amplitude in-phase bipolar parallel current pulse; and a detection unit for detecting the transmitting current, clamping current, and clamping voltage respectively, and feeding back the detection results to the control unit.

This invention relates to a caster with a cyclic positioning structure. By stepping on the pedal, the drive rod and drive plate are rotated, causing the positioning bolt on the drive plate to move cyclically between the first positioning point, the second positioning point, and the path point of the positioning component. This causes the cam unit to push against the shaft, allowing the positioning plate to engage or disengage from the directional hole. The locking end of the locking component engages or disengages from the locking groove, thereby achieving the effect of stopping or preventing the caster from rotating, or releasing or allowing the caster to rotate arbitrarily.

The invention belongs to the technical field of aviation power distribution systems, and discloses an active protection circuit suitable for an SSPC power loop. A TVS (Transient Voltage Suppressor) and a diode are additionally arranged between a grid electrode and a drain electrode of an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), the TVS is broken down when instantaneous high voltage comes, so that the voltage is gradually applied to the grid electrode of the MOSFET, and the MOSFET is gradually turned on through charge accumulation; the diode plays a role in conducting when the TVS is broken down and plays a role in reverse prevention when the driving voltage arrives. By means of the design, the requirement for power during TVS model selection can be reduced, the TVS with the small size can be selected, and circuit refinement, miniaturization and high-safety design are achieved.

The invention discloses a CEB waste heat recovery safety system and method based on the metal fiber surface combustion technology, the system comprises a CEB direct combustion device, a combined air inducing device, a waste heat recovery unit and a control unit, the combined air inducing device is arranged at the rear end of a smoke outlet of the CEB direct combustion device, and an air inducing channel and an emergency discharge channel are arranged in the combined air inducing device in parallel; the control unit monitors system pressure parameters in real time, controls the air inducing channel to be opened under the normal working condition, and introduces high-temperature flue gas into the waste heat recovery unit for heat energy recovery. When it is monitored that the pressure exceeds a safety threshold value, the combined air inducing device is immediately controlled to be switched to an emergency relief channel, smoke is directly exhausted into the atmosphere, and rapid pressure relief is achieved. By means of a double-channel switching mechanism of the combined air inducing device, the adaptability problem of CEB direct combustion equipment and a waste heat recovery system under the fluctuating load is effectively solved, and the safety of the CEB direct combustion equipment and the waste heat recovery system is improved. The device has efficient waste heat recovery and intrinsic safety protection capabilities, and is suitable for storage and transportation tank areas, loading platforms and other scenes where waste gas loads fluctuate severely.