86results about How to "Avoid malfunctioning" patented technology

The invention relates to the technical field of energy storage inverters, in particular to an automatic detection method of a CT installation state. Comprising the following steps: periodically outputting a preset power pulse to a power grid end through an inverter; adjusting the output power of the inverter, and collecting and calculating the power change of the power grid end CT; judging the installation direction of the CT based on the change of the output power of the inverter and the change of the power of the power grid end CT; based on the change of the power grid end CT power along with the change of the output power of the inverter, whether the external CT of the energy storage mixed network inverter is installed and the installation direction are automatically detected by continuously adjusting the output power of the inverter and collecting the change of the power grid end CT power, so that the difficulty of field installation is reduced, the installation efficiency is improved, and the installation cost is reduced. And meanwhile, the situation that the CT cannot work due to the wrong CT installation direction is avoided.

The invention relates to the field of telecommunication, in particular to a distributed acquisition and control networking method. The method comprises the following steps: optical distributed acquisition and control host equipment is in communication connection to form an optical distributed acquisition and control host core looped network; the two optical distributed acquisition and control host devices control one slave optical fiber hand-in-hand connection device to perform management and communication dual-machine redundancy between the two optical distributed acquisition and control host devices, and the two optical distributed acquisition and control host devices form an optical distributed control looped network; the slave optical fiber hand-in-hand connected equipment module is linked with the detection equipment, and the data acquisition efficiency of the optical distributed control ring network is calculated; judging whether one of the optical distributed acquisition and control host equipment is in a disconnected state or not; and calculating the time delay of the slave optical fiber hand-in-hand connection equipment communication connection detection equipment. The problem that monitoring and control are directly influenced by communication interruption among equipment in a part of areas in optical fiber communication is solved; and after the optical distribution type acquisition and control host equipment breaks down, the whole networking cannot work if the dual-redundancy backup is lacked, and the like.

The present invention discloses a transformer that is easy to install, including a mounting base and two mounting boxes. The mounting base is provided with a mounting cavity inside, the top of the mounting base is fitted with a transformer housing body, the bottoms of both sides of the transformer housing body are fixedly connected with slides, both sides of the top of the mounting base are provided with sliding openings, the bottom of the slide is slidably connected in the sliding openings and extends to the inside of the mounting base, both sides outside the mounting base are slidably connected with sliding rods, and the lower half of the sliding rods is slidably connected in the mounting base. The present invention is provided with a sliding rod, a mounting box, a fixed opening, a push plate, a handle, and a support spring. The cooperation of the main mounting seat, the connecting member, the auxiliary mounting seat, the rotating shaft, the rotating plate, the clamping member, the sliding opening, and the sliding groove can not only firmly fix the transformer housing body on the mounting base, but also conveniently remove the transformer housing body from the mounting base, thereby increasing the practicality of the device.

The utility model relates to the technical field of intelligent substations, in particular to an intelligent substation prefabricated cabin which comprises a cabin body, a ceiling is arranged on the top of the cabin body, a solar power generation device is arranged on one side of the ceiling, and the output end of the solar power generation device is connected with an electric power storage box installed on the outer side of the cabin body. A plurality of power devices required by the transformer substation are installed in the cabin body, an air conditioner is arranged on the rear side of the power devices, an air purifier is installed in the middle of the upper portion in the cabin body, the two sides of the air purifier are connected with air inlet fans through pipelines, and an exhaust fan is arranged on the other side of the cabin body. The solar power generation device and the electric power storage box are used for storing electric power converted from solar energy, when the electric power cannot be supplied temporarily, temporary power supply treatment can be carried out through the electric power stored in the electric power storage box, and the problem that an air conditioner and other electric power equipment cannot work is solved.

The invention relates to the technical field of industrial robots, and discloses an industrial robot convenient to disassemble and assemble, the industrial robot comprises a mechanical arm, a clamping jaw and a hydraulic pipe, the clamping jaw is arranged at the top of the mechanical arm, the hydraulic pipe communicates with the outer wall of the clamping jaw, and a rapid disassembly and assembly assembly convenient to disassemble and assemble is arranged at the top of the clamping jaw. The top of the mechanical arm is provided with a positioning assembly used for being matched with the rapid dismounting and mounting assembly to fix the clamping jaw, the outer side of the hydraulic pipe is provided with a sealing detection assembly used for detecting the sealing performance, and through the arrangement of the positioning assembly and the rapid dismounting and mounting assembly, the purpose of rapidly dismounting the clamping jaw at the top of the mechanical arm is achieved; meanwhile, by means of the quick dismounting mode, a worker can quickly replace different types of clamping jaws according to different work tasks, the connection design of the tops of the clamping jaws and the fixing blocks is reasonable, it is ensured that the clamping jaws are stable and reliable in the replacement process, firm fixing of the clamping jaws is achieved, and the working efficiency is improved. And the risk that the clamping jaws are loosened or fall off in the working process is reduced.

The invention discloses a reciprocating displacement pump fluid end for conveying trace super media, which comprises a pump body, a motor arranged on the pump body, a worm connected to the output end of the motor, a turbine rotatably connected to the inside of the pump body, a plunger slidably connected to the pump body, an accommodating cavity, a liquid suction one-way valve and a liquid discharge one-way valve arranged on the pump body, and a lantern ring connected to the pump body, an axial flow channel is arranged in the lantern ring; the pump body is connected with a fan-shaped valve seat, a fan-shaped cavity for heat conduction liquid to flow is formed in the fan-shaped valve seat, an inlet flow channel is formed in one end of the fan-shaped valve seat, an outlet flow channel is formed in the other end of the fan-shaped valve seat, and an electric heating wire for heating the heat conduction liquid is wound around the inlet flow channel. One end of the axial flow channel communicates with the inlet flow channel, and the other end communicates with the outlet flow channel; a swing plate is rotationally connected into the fan-shaped valve seat. A cylinder body is arranged outside the fan-shaped valve seat, a piston is connected into the cylinder body in a sliding mode, and an intercepting plate is connected to the piston. The reciprocating type displacement pump fluid end for conveying the trace super-temporary medium is suitable for low-temperature occasions, the phase state of the medium is constant, and conveying is more stable.

The utility model relates to a fire alarm device, in particular to a novel self-powered building fire alarm device. Comprising a power supply structure and an alarm structure. The power supply structure comprises a solar photovoltaic device and a storage battery, the solar photovoltaic device and the storage battery are both fixedly arranged on the roof, the solar photovoltaic device is electrically connected with the storage battery, and the storage battery is electrically connected with the alarm structure through a cable; the alarm structure comprises a shell, a temperature sensor, a first buzzer, a light alarm, a smoke sensor, a second buzzer and a controller, the shell is connected with a building wall, and the temperature sensor, the first buzzer, the light alarm, the smoke sensor and the second buzzer are arranged outside the shell; the temperature sensor, the first buzzer, the light alarm, the smoke sensor and the second buzzer are in signal connection with the controller, and the controller is arranged in the shell. The technical problem that a storage battery of an existing fire alarm device is internally arranged, so that spontaneous combustion is prone to occurring, and working stability is affected is solved.

The utility model relates to a control circuit of a water pumping device and the water pumping device, the control circuit comprises a detection module, a main control module and a driving module, the output end of the detection module is connected with the first signal end of the main control module, and the first control end of the main control module is connected with the controlled end of the driving module. Whether water exists on the circuit board or not is detected in real time through the detection module, when the detection module detects that water enters the circuit board, a water inlet signal is output to the main control module, after the main control module receives the water inlet signal, the motor is controlled to stop working, meanwhile, the whole circuit board is controlled to stop, and the main control module is in a dormant state; the problem that a circuit of a circuit board is out of control after water enters a product can be avoided, the starting module can be shut down in time to enable the water pumping device to stop pumping water when a user is absent, the problem that the water pumping device cannot work due to the fact that components are damaged due to water inflow can be effectively avoided, unnecessary loss brought to consumers is avoided, and the water pumping device is suitable for popularization and application. The service life of the water pumping device is effectively prolonged.

The invention relates to the technical field of glass processing, and discloses a modified glass kiln which comprises a mounting plate, the mounting plate is fixedly mounted at the bottom of the kiln, a flame gun is arranged on one side of the mounting plate, a sliding device is mounted between the flame gun and the mounting plate, and the sliding device is used for driving the flame gun to move transversely. A lifting mechanism is arranged on one side of the flame gun and comprises a first gear and a rack which are meshed with each other, a transmission mechanism is arranged on one side of the first gear and comprises a first chain wheel, a chain and a second chain wheel which are meshed with each other, and a rotating shaft is fixedly installed on the second chain wheel. A power device is arranged at one end of the second chain wheel; the flame gun is arranged to replace traditional coal combustion, environmental protection is achieved, the double spray guns are arranged, replacement can be achieved during long-time use, damage to the spray guns due to too high temperature is avoided, and the situation that the spray guns cannot work when blocked can be prevented.

The invention discloses a vehicle access control management method and system, and the method comprises the steps: generating an access control information acquisition data frame in response to the first information of a to-be-scanned vehicle received by access control detection equipment; sending the access control information acquisition data frame to a first data platform and a second data platform; after access control information acquisition data frames returned by the first data platform and the second data platform are received, the second information and the third information are stored in a cache database and a local database, and the first data bit and the second data bit are acquired to judge the release state of the to-be-scanned vehicle. According to the vehicle access control management method, when the vehicle enters, after the first information of the vehicle is scanned, the information is uploaded to a related traffic safety comprehensive service management platform and an environmental protection detection platform of the Ministry of Public Security, so that official and formal data can be obtained in the vehicle access control management process to judge the information of the vehicle; and the condition of mistakenly lifting the rod is avoided.

The utility model relates to the technical field of stamping dies, in particular to a generator rotor punching sheet stamping composite die which comprises a bottom plate, a plurality of supporting seats, a die mechanism and a connecting mechanism, the supporting seats are arranged at the bottom of the bottom plate, the die mechanism is connected with the bottom plate through the connecting mechanism, and the die mechanism is connected with the bottom plate through the connecting mechanism. The mold mechanism comprises a lower mold base, a groove, an upper mold base, a protrusion and an installation block, the groove is formed in the lower mold base, the protrusion is arranged on the upper mold base, the installation block is fixedly connected with the top of the upper mold base, the upper mold base is matched with the lower mold base, the groove is matched with the protrusion, and the installation block is fixedly connected with the top of the upper mold base. The bottom plate is provided with a through hole, the through hole penetrates through the bottom plate, the connecting mechanism comprises a sliding assembly, a guide column, a first guide block, a second guide block and a limiting plate, and the generator rotor punching sheet punching composite die solves the problem that existing equipment is inconvenient to disassemble.

The present invention discloses a task scheduling method, device and medium, which are applicable to the field of data processing technology. By dividing the task into multiple standard tasks to be scheduled, and splitting into multiple execution windows at the same time, executing the current standard task to be scheduled in one execution window and then executing the next standard task to be scheduled, that is, executing the scheduled tasks in series, recording the waiting time during the scheduling process to realize timely perception of the pressure of task execution on the downstream, if the waiting time reaches the maximum execution time, it means that the downstream pressure is large, abandoning the current standard task to be scheduled and dynamically adjusting the scheduling configuration parameters so as to obtain the next standard task to be scheduled in the subsequent current execution window. Avoid the problem of downstream overload and server failure to work normally under normal circumstances, and improve the stability of concurrent scheduling of large batches of tasks.

The utility model discloses a combined supporting device for an oil gas recovery variable frequency pump, which belongs to the technical field of variable frequency pumps and comprises a pump body, a driving motor is connected to one side of the pump body, a first supporting plate is connected below the pump body, and a second supporting plate is connected below the driving motor. The first supporting plate is connected with a main connecting plate through bolts, the second supporting plate is connected with an auxiliary connecting plate through bolts, fixing blocks are connected to the lower portion of the main connecting plate and the lower portion of the auxiliary connecting plate, a positioning groove is formed in the main connecting plate, and fixing rods are connected to the two sides of the main connecting plate. According to the combined type supporting device for the oil gas recovery variable frequency pump, the air box is fixed through the limiting blocks on the two sides of the auxiliary connecting plate, sliding deviation of the air box is prevented, the rotating motor rotates the fan blades, air is blown to the driving motor from the ventilation opening through the fan blades, heat dissipation of the driving motor is accelerated, and the situation that the pump body cannot work normally due to high temperature is avoided.

The utility model discloses a power supply system of a combustible gas monitoring device on a field mobile platform, the combustible gas monitoring device on the field mobile platform comprises a monitoring assembly, the monitoring assembly comprises a combustible gas monitor, the power supply system comprises a battery and a power generation system, and the battery is electrically connected with the monitoring assembly and is used for supplying power to the monitoring assembly. The power generation system comprises a wind power generation device and a solar power generation device, and the wind power generation device and the solar power generation device are electrically connected with the battery and used for charging the battery. The power generation system comprises the wind power generation device and the solar power generation device, and the wind power generation device and the solar power generation device are electrically connected with the battery and used for charging the battery. The combustible gas monitoring device can fully utilize wind energy and solar energy in a field environment to charge the battery, timely supplement the electric quantity of the battery, prolong the operation time of the monitoring assembly, avoid the situation that the monitoring assembly cannot work due to no electric energy supply, and enable the combustible gas monitoring device to be more suitable for the field environment.

The invention belongs to the field of communication, and particularly relates to a centerless Mesh networking method, a communication node and a storage medium, and in the method, the communication node can join a corresponding network topology by sending a request of joining the network topology to any node of the network topology. When information needs to be transmitted to other nodes, the optimal transmission path can be automatically searched and determined for information transmission; in the application, the communication node can realize various node functions without being controlled by any central node, so that the excessive dependence of the communication node on a certain node is avoided, and the problem that each node in the network topology cannot work normally due to the fault of the certain node can be further avoided.

The utility model relates to the field of camellia oleifera seed extraction, and discloses a camellia oleifera seed crushing device for camellia oleifera extraction, which comprises a crushing tank body, the inner bottom end of the crushing tank body is fixedly connected with a support pillar, the top end of the support pillar is rotatably connected with a middle crushing roller, and the top end of the middle crushing roller is fixedly connected with a drainage cone. An outer side crushing sleeve is rotatably connected to the inner wall of the crushing tank body, a supporting disc is fixedly connected to the exterior of a supporting table column, a second rotating shaft is rotatably connected to the interior of the supporting table column, a mounting frame is fixedly connected to the middle of the bottom end of the crushing tank body, and a driving motor is fixedly connected to the bottom end of the mounting frame. The crushing efficiency is higher, the crushing efficiency of camellia seeds is improved, squeezing of grease is accelerated, the situation that the downward flowing efficiency of the grease is affected by waste accumulation is avoided, meanwhile, the situation that the device cannot work normally due to waste accumulation is avoided, and cleaning work is more convenient.

The utility model relates to the technical field of lift valves, in particular to an air seal lift valve convenient for blocking waste gas, which comprises a valve body, the top of the valve body is fixedly connected with an air cylinder, the output end of the air cylinder penetrates into the valve body to be connected with the top of a motor, and the output end of the motor is provided with an air seal assembly. Impurities in waste gas are filtered through a filter screen, the situation that the sealing plate, the sealing strip and the sealing ring of the lifting valve cannot be completely closed and waste gas leaks due to the fact that the impurities are attached to the surfaces of the sealing ring, the sealing plate and the sealing strip is prevented, a threaded rod is driven by a motor to rotate, and a threaded sleeve is in threaded connection with the threaded rod; therefore, the threaded sleeve drives the connecting disc to move up and down in the direction of the guide rod, the sealing plate at the bottom is driven to block or circulate waste gas, the problem that the lifting valve cannot work under the condition that gas of the air cylinder is cut off accidentally is effectively solved, and double insurance is more reliable.

The utility model provides a screening device. The screening device comprises a screening assembly and an anti-blocking assembly (3), the screening assembly comprises a screen, the anti-blocking assembly (3) comprises a mounting seat (31), a lifting structure and a knocking part (34), the lifting structure and the knocking part (34) are arranged in the mounting seat (31), the lifting structure is in driving connection with the knocking part (34), and the knocking part (34) can knock the screen. According to the screening device, the problem that an existing screening device needs to be shut down to conduct manual dredging on the screen cloth of the screening device can be solved, and therefore production efficiency is improved, and maintenance cost is reduced.

The utility model discloses an energy-saving environment-friendly boiler convenient for internal cleaning, which comprises a boiler, a flue gas ring pipe and a combustion furnace, the boiler is connected with a water inlet and a water outlet, the water inlet and the water outlet are provided with valves, the combustion furnace is provided with the boiler, and a combustion chamber and a slag chamber are arranged in the combustion furnace. And a slag car is arranged in the slag chamber, the slag car is arranged below the auger mechanism, one side of the combustion furnace is connected with an air inlet pipe, and a fan is installed in the air inlet pipe. According to the energy-saving and environment-friendly boiler with the interior convenient to clean, generated slag passes through a sieve plate and enters the auger mechanism through a guide block, the motor drives the auger mechanism, the slag is discharged from a slag outlet of the auger mechanism, at the moment, the slag falls into the slag vehicle, and therefore cleaning of the slag in the combustion chamber is completed; a worker pulls out the slag car from the entrance and the exit and drags the slag car to a designated area for cleaning, and compared with manual cleaning with a shovel, the slag car is more convenient and faster to clean.

The invention provides a phase-locked loop detection circuit, a phase-locked loop circuit and electronic equipment, and belongs to the technical field of integrated circuits. The detection circuit comprises a locking detection module and a clock detection module. The locking detection module can reliably detect whether the phase-locked loop is locked or not based on the locking indication signal, and outputs the unlocking indication signal when detecting that the phase-locked loop is unlocked; the clock detection module can reliably detect whether a clock signal generated by the phase-locked loop has frequency offset based on a reference clock signal and a to-be-detected clock signal, and outputs a frequency offset indication signal when detecting that the clock signal has frequency offset. Therefore, the external controller can adjust the work of the phase-locked loop in time based on the unlocking indication signal and the frequency offset indication signal, and the situation that a circuit working based on the clock signal cannot work normally due to the influence of various factors such as the fact that the phase-locked loop cannot be locked or the clock signal generated by the phase-locked loop generates frequency offset is avoided.

The utility model belongs to the technical field of tamping machine camshafts, and particularly relates to a tamping machine camshaft driving structure which comprises a tamping machine body, a power storage driving mechanism is arranged on the top of the tamping machine body, and the power storage driving mechanism comprises a battery box, a battery body, a dismounting plate, a threaded rod, a rotating motor, a threaded hole and a camshaft body. The battery box is connected to the top of the tamping machine body, the battery main body is arranged in the battery box, threaded rods are inserted into the four corners of the dismounting plate, and the rotating motor is arranged at the front end of the tamping machine body; when the tamping machine cannot be connected with an external power supply for power supply, the output end of the rotating motor can be driven by the battery main body to rotate, so that the driving mode of the camshaft body is changed, the problem that the tamping machine body cannot work without an external power supply is solved, and the practicability of the tamping machine is greatly improved.

The utility model provides a clutch type electric push rod retreating device which comprises a fixed seat, a shell, a power motor, a lead screw, a push rod and a clutch mechanism, the shell is arranged on the fixed seat, the power motor is arranged in the shell and located on the upper side of the fixed seat, the lead screw is rotationally arranged on the side, away from the power motor, of the fixed seat, and the push rod is arranged on the shell. The lead screw is in power connection with the power motor, the outer circle face of the lead screw is sleeved with a lifting base, and the push rod is arranged in the shell in a sliding mode. According to the scheme, the clutch sliding rod drives the connecting tile to be far away from the outer circle face of the lead screw, then supporting force used for balancing counter-acting force on the push rod disappears, rapid rollback after touch is achieved, safety and reliability of equipment are improved, the situation that an electrical rollback mechanism cannot work normally due to circuit faults caused by long-time use is avoided, accurate control is achieved, and the service life of the equipment is prolonged. And the requirements of modern equipment and systems on high precision and high reliability are met.

The present disclosure relates to a display driving system and a display panel, wherein the display driving system includes a plurality of cascaded driving circuits; each of the driving circuits is used to determine the input port of display data and the output port of display data according to the level of the input of each port; the display data is received and decoded through the input port of the display data, and a first group of image data in the display data is stored, and a pixel unit corresponding to the driving circuit is driven according to the stored image data; the display data is adjusted, and the reconstructed display data is forwarded to the next level driving circuit through the output port of the display data. The display driving system provided by the present disclosure can improve the reliability of the display driving system.

The present invention comprises: a semiconductor switch unit including a first semiconductor switch having a drain terminal connected to a power grid, a second semiconductor switch having a drain terminal connected to a load, and first and second diodes each having a positive electrode and a negative electrode respectively connected to a source terminal and the drain terminal of each semiconductor switch; a bypass circuit which connects the drain terminal of the first semiconductor switch to the source terminal of the second semiconductor switch; and a control unit which, when the power grid is connected to the semiconductor circuit breaker, supplies a current to the load through the bypass circuit and the second diode by closing the bypass circuit while the first and second semiconductor switches are turned off, and which, when preset conditions are met, turns on the first and second semiconductor switches so as to open the bypass circuit so that a current is supplied to the load through the semiconductor switch unit.

The utility model discloses an ultrasonic pickling device for braised beef brisket premade vegetables with radishes, which comprises a box body, and a pickling tank is arranged in the box body; an inner cavity located below the pickling tank is formed in the box body, an ultrasonic generator is arranged in the inner cavity, and the emitting end of the ultrasonic generator is tightly attached to the upper end in the inner cavity; a pickling basket is placed in the pickling tank, and the lower part of the pickling basket is rotationally connected with a dumping plate; the pickling basket is provided with a switch mechanism fixed with the outer end of the dumping plate; a lifting and dumping mechanism is arranged on the box body, and the output end of the lifting and dumping mechanism is connected with the pickling basket; a cushioning mechanism is arranged at the lower part of the box body; a movable stirring mechanism is arranged on the pickling basket; a protective cover is connected to the upper part of the box; a discharging opening is formed in the bottom of the pickling tank and penetrates to the bottom end of the box body, and a control valve is arranged in the discharging opening. The device can quickly separate the pre-prepared vegetables from the pickling liquid and take out the pre-prepared vegetables, and has the characteristics of convenience and quickness.

The utility model discloses a projection screen with a sound amplification function. The projection screen comprises a screen rolling rod; an inner cavity of the projection mechanism is fixedly connected with the surface of the screen winding rod, the projection mechanism comprises a hollow rod sleeve, a screen body, fixing blocks and a working plate, the inner cavity of the hollow rod sleeve is movably connected with the screen body, and the left side and the right side of the surface of the screen winding rod are fixedly sleeved with the fixing blocks. And the right side of the fixed block is fixedly connected with a working plate. The small air cylinder, the supporting block, the supporting rod, the L-shaped plate, the fixing plate, the control plate, the vertical plate and the supporting spring are used in cooperation, the small air cylinder is started to drive the supporting block to move backwards, and the supporting block moves backwards to drive the supporting rod and the L-shaped plate to move rightwards to be away from the fixing plate; the control panel pulls the vertical plate to drive the vertical plate to move forwards to extrude the supporting spring, so that the vertical plate is far away from the fixed plate to be detached, and the experience effect of the projection screen is improved.

The invention provides a filling pipeline cleaning method. The filling pipeline cleaning method comprises the steps that a pressure monitoring slurry discharging tee joint is arranged; determining a blocked pipe section according to data of the pressure monitoring blow-off tee joint; checking before cleaning; cleaning the filling pipeline; testing after cleaning; and filling pipeline cleaning is completed. According to the filling pipeline cleaning method, the pressure monitoring device is arranged at the important pipeline node, the blocked pipe section is determined through the pressure difference, and therefore the problem that it is difficult to accurately position the blocked pipe section of the filling pipeline through an existing cleaning method is solved.

The utility model discloses a FPGA protection device is connected with working power supply and FPGA who connects each other respectively, including quick discharge circuit and load capacitor, quick discharge circuit includes first diode, second polarity capacitor, first switch tube, second switch tube, first resistance, second resistance, third resistance and fifth resistance, the anode of first diode is connected between working power supply and FPGA, its cathode is connected with the positive pole of second polarity capacitor of negative pole ground, the control end of first switch tube is connected with working power supply through first resistance, the first end of first switch tube is connected with the cathode of first diode and the positive pole of second polarity capacitor, the second end of first switch tube is grounded after second resistance, and is connected with the input of second switch tube through third resistance, the output of second switch tube is connected between working power supply and FPGA after fifth resistance, one end of load capacitor is grounded, and the other end is connected between working power supply and FPGA.

This invention relates to a compact spring return actuator, and more particularly to an actuator for emergency reset of a valve in the event of an emergency such as a power outage. The actuator is equipped with differential planetary gear reducers in both the drive shaft (operated by a motor) and the working shaft (operated by an elastic body of the emergency reset assembly), and these differential planetary gear reducers are meshed together. This duality allows the power transmission of the motor and the elastic body to be independent of each other, thereby reducing motor capacity and miniaturizing the components of the power transmission system. Ultimately, this results in a compact spring return actuator that is lightweight and miniaturized as a whole. To achieve the objectives described above, the compact spring return actuator of the present invention is characterized by comprising: a drive shaft that receives power from a motor and rotates; a driven shaft that rotates by means of the drive shaft and opens and closes a valve; a reduction assembly that reduces the rotational force transmitted to the driven shaft, including a differential planetary gear reducer mounted on the drive shaft; and an emergency reset assembly equipped with an elastomer and a working shaft that converts the elastic force of the elastomer into a rotational force for transmission and engagement with the differential planetary gear reducer, for rotating and resetting the valve when the power is disconnected.