12results about How to "Close reliable" patented technology

The utility model relates to a kind of electric protection devices of refining furnace door, including refining furnace and furnace door, furnace door is vertical hinged door, further including detection mechanism and the electric push rod of driving furnace door switch, the detection mechanism includes the mounting plate of being fixedly connected in the outside of furnace door, the top rod of being slidably connected on mounting plate along furnace door switch direction and the trigger rod of being horizontally slidably connected on mounting plate, one end of the trigger rod is drivingly connected with top rod, and the other end of trigger rod is equipped with the microswitch of being fixedly connected on mounting plate, the utility model drives furnace door switch by electric push rod, realizes the automation of furnace door operation, specially equipped with detection mechanism, can feedback closed state when furnace door is closed, greatly improve state visibility and operation safety, system is also integrated cooling waterway structure, the working temperature of furnace door and electric actuator is effectively reduced by circulating cooling water in internal water tank and transition water tank, significantly reduce the thermal damage of high temperature to electric push rod and microswitch, prolong service life.

The utility model discloses a kind of key switch machine circuit and printer based on bistable circuit, wherein, key switch machine circuit based on bistable circuit, including power supply conversion unit, self-locking circuit and button, bistable circuit;The enable end of power supply conversion unit is connected by self-locking circuit and button, bistable circuit;Power supply conversion unit is used to convert input power supply into working power supply, and its enable control end is used to control power output;Self-locking circuit is used to pull low the enable end of power supply conversion unit after button is pressed and maintain low level, realize the self-locking of power output;Bistable circuit is used to change output state when button is pressed again, cut off self-locking circuit, so that the enable end of power supply conversion unit restores high level, to close power output.The utility model discloses the key switch machine circuit based on bistable circuit of the utility model, using single self-resetting button can complete the opening and closing of power supply, and, circuit response is stable, operation logic is clear.

The utility model belongs to the technical field of packaging mechanical equipment, and relates to a weighing hopper structure which comprises a weighing cylinder and a discharger arranged at the top of the weighing cylinder in a matched mode, and a discharger driving motor is installed on one side of the discharger so as to drive a discharger discharging valve to rotate and control the discharging end of the lower portion of the discharger to be opened and closed. A baffle is arranged on the top of the weighing cylinder corresponding to the closed side of the discharging valve of the discharger, a clamping groove in the lower portion of the baffle is clamped on a frame plate on the top of the discharger and fixed through a bolt, and the upper portion of the baffle is provided with a folding portion so that when the discharging valve of the discharger is closed, materials blocked by the discharging valve of the discharger can fall into the weighing cylinder after being folded. According to the hopper structure, in the closing process of the discharging valve, materials can be effectively collected, and the materials are prevented from splashing into a workshop.

The invention provides a contact structure and a load switch, and relates to the technical field of low-voltage electrical appliances, the contact structure comprises a first moving contact and a second moving contact which are oppositely arranged, and at least one end of the first moving contact and at least one end of the second moving contact form a clamping space for clamping a first static contact. The first moving contact and the second moving contact are arranged in a non-parallel manner. A clamping type contact structure is adopted, the current directions of the adjacent movable contact pieces of the clamping type contact are the same, when short-circuit current exists, mutual attraction acting force is shown, the contact can be tightly pressed, and therefore the anti-short-circuit performance of a product is improved; and the first moving contact and the second moving contact are arranged in a non-parallel manner, so that friction force during closing of the contacts can be reduced, and reliable closing and opening actions of a product are ensured.

The invention belongs to the technical field of petrochemical engineering, and particularly relates to a temperature reducing device, an anti-surge system and a compressor. The nozzle body is provided with a containing cavity and a flow guide channel communicated with the containing cavity, the end, away from the flow guide channel, of the containing cavity is provided with an opening, and the end, away from the containing cavity, of the flow guide channel is communicated with a process refrigerant pipeline; the rotational flow valve element is arranged in the opening in a penetrating mode and arranged in the containing cavity in a sliding mode, and the rotational flow valve element can be switched between a first position and a second position; the valve rod penetrates through the valve seat and is connected with the rotational flow valve core; the adjusting piece is located outside the containing cavity and movably connected with the end, away from the rotational flow valve element, of the valve rod. The elastic piece is located outside the containing cavity and arranged on the valve rod in a sleeving mode, and the two ends of the elastic piece abut against the adjusting piece and the nozzle body respectively. According to the temperature reduction device, the anti-surge system and the compressor, efficient and fine atomization and refrigeration effects can be guaranteed, and the heat exchange efficiency is improved.

A storage structure and a refrigerator. The storage structure (43) for a refrigeration device comprises: a cabinet assembly (10) having an open end (13); a cabinet cover (20) arranged at the open end (13) of the cabinet assembly (10) and movable between a closed position and a maximum open position relative to the open end (13); a return drive assembly (30) operably connected with the cabinet assembly (10) and the cabinet cover (20) and configured to apply a driving force to the cabinet cover (20) to enable the cabinet cover (20) to automatically return when the cabinet cover (20) moves to a preset stroke position towards the closed position under the action of an external force. The preset stroke position is between the closed position and the maximum open position.

The utility model provides a vehicle door anti-pinch mechanism and a ferry vehicle, and relates to the technical field of transportation. The car door anti-pinch mechanism comprises a driving assembly, an anti-pinch assembly and an anti-pinch failure assembly, the driving assembly comprises a driving piece, and the driving piece is connected to a car door, can drive the car door to move and is used for opening and closing the car door; the anti-pinch assembly is configured to control the vehicle door to be opened when the vehicle door makes contact with an obstacle. The anti-pinch failure assembly comprises a moving part, a first induction part and a first detection part, the moving part is connected to the end, away from the automobile door, of the driving part, the driving part can drive the moving part to move, the first induction part is connected to at least one of the driving part and the moving part, and the first detection part is used for detecting the position of the first induction part. The induction points are additionally arranged on the moving part, the first detection part detects the first induction part which linearly reciprocates along with the moving part, the detection process is stable, fluctuation is not prone to occurring, the anti-pinch distance is effectively shortened, and debugging is easy and convenient.

A manual closing structure of a magnetic control type circuit breaker comprises a support. The electromagnetic mechanism comprises a driving rod; the manual closing assembly comprises an operation shaft, a push rod and a sliding part, the sliding part is arranged on the support in a sliding mode in the closing direction and can be switched from the first position to the second position, the sliding part and the driving rod are arranged correspondingly, the operation shaft rotates around a third rotation center c, the push rod is connected with the operation shaft, and the push rod can rotate along with the operation shaft; and the push rod drives the sliding piece to push the driving rod to move towards the closing direction. A magnetic control type circuit breaker comprises a rotating shaft system and a manual closing structure. The invention relates to the field of low-voltage electric appliances, in particular to a manual switching-on structure of a magnetic control type circuit breaker and the magnetic control type circuit breaker, switching-on of the circuit breaker can be achieved only by rotating an operating shaft without additionally providing an external power source, the operating shaft and a sliding part are in transmission through a push rod, rotation is converted into linear sliding, and the linear sliding is output to a driving rod. Manual rotation operation is facilitated, and reliable and stable manual closing can be realized.

This invention discloses a control system for train doors, comprising a door controller, a permanent magnet synchronous motor, and door control signals. The door controller includes an EMI circuit, a power supply module, a safety circuit, an input port circuit, a CPU1, a motor drive module, and a current detection module. The permanent magnet synchronous motor includes motor windings, a magnetic encoder detection magnet, and a magnetic encoder. The magnetic encoder internally includes a magnetic encoder chip, a CPU2, and a CAN interface chip. The door control signals include an open signal, a close signal, a lock-in signal, an emergency unlock signal, a zero-speed signal, and an enable signal. The magnetic encoder significantly improves the motor's control accuracy and solves the accuracy and interference issues of Hall effect sensors. Through the FOC dead-zone compensation control algorithm, low-speed, high-torque operation is achieved, solving problems such as unstable door operation under special conditions, anti-pinch during opening and closing, and unreliable door closing. This improves door control performance, reduces vehicle operation risks, and ensures reliable vehicle operation.

The invention relates to the technical field of valves, in particular to a power-level two-way hydraulic control main valve which comprises a main valve body, a valve sleeve is arranged in the main valve body, a valve element is arranged in the valve sleeve, the valve element is connected with a two-way hydraulic control device, the two-way hydraulic control device controls the valve element to act, the valve is controlled through high-pressure oil, and the valve is stable in state and good in anti-seismic effect. The action speed of the valve can be controlled, the valve is driven to act through high-pressure oil under the small driving power of the electromagnetic valve, then the driving force of the valve is increased, and the corresponding speed of the valve is increased.

The invention discloses a self-discharging type liquid injection needle valve, and belongs to the technical field of lithium battery liquid injection. The self-discharging type liquid injection needle valve solves the technical problems that when an existing self-discharging type liquid injection needle valve is in a standby state, a flow channel is prone to crystallization, and sealing is not tight due to plug eccentricity. The self-discharging type liquid injection needle valve comprises a valve body assembly, a valve port assembly, a driving assembly, a diaphragm assembly and a first elastic reset piece. The diaphragm assembly is used for isolating the flow channel from the driving assembly, and a valve element piece of the diaphragm assembly is matched with the valve port assembly to control the liquid injection port. The driving assembly and the diaphragm assembly are in disconnected connection, and selective transmission of driving force is achieved. The first elastic reset piece applies elastic force for closing the liquid injection opening to the diaphragm assembly. The driving assembly and the diaphragm assembly are arranged to be of a disconnected structure, automatic closing is achieved through the elastic reset piece, runner crystallization is effectively prevented, the leakage problem caused by assembly eccentricity is solved, and the diaphragm valve has the advantages of being reliable in sealing and low in maintenance cost.

The invention provides a fault protection system and method for an MOPA structure fiber laser. Wherein the system comprises: a primary seed source for providing the seed light to an amplification stage; the standby seed source is used for providing the seed light for the amplification stage when the main seed source is monitored to be abnormal; the monitoring module is used for monitoring the working state of the main seed source in real time, and generating a fault trigger signal when an abnormality is monitored; the switching module is used for switching the source of the seed light received by the amplification stage from the output of a main seed source to the output of a standby seed source within a preset response time after receiving the fault trigger signal; and the protection module is used for sequentially closing the amplification stage and the standby seed source according to a preset sequence after the standby seed source takes over. According to the fault protection system disclosed by the invention, the light emitting state of the standby seed source is switched at a microsecond magnitude, so that the optical fiber damage caused by the fault of the seed source in the MOPA structure optical fiber laser system is avoided, the maintainability is improved, and the maintenance time and the maintenance cost are remarkably reduced.