26results about How to "Avoid overheating damage" patented technology

The application relates to the technical field of DCS control systems, in particular to an analog quantity input system with input current limiting protection, which comprises at least one channel circuit for connecting and providing acquisition current for an external AI instrument and a sampling control circuit connected with each channel circuit; wherein the sampling control circuit is used for acquiring the voltage value of any channel circuit and controlling the switch of the channel circuit according to the acquired voltage value. The analog quantity input system with input current limiting protection can prevent the overheat damage of MOS tubes in the channel circuit, keep the channel circuit from generating less heat when overcurrent occurs and improve the reliability, compared with the prior art.

The invention discloses a relay control method based on temperature induction. The relay control method comprises the following steps: acquiring electrical equipment protected by a relay to obtain a current current value; obtaining a current-time limit mapping relation; determining an initial countdown time limit corresponding to the current current value based on the current current value and a current-time limit mapping relation; acquiring the current working temperature of the relay to obtain a current temperature value; calculating a final countdown time limit based on the current temperature value and the initial countdown limit; and controlling the relay to trip based on the final countdown time limit. Therefore, the inverse time limit characteristic and the temperature protection are organically combined, more accurate, reasonable and efficient overcurrent protection can be carried out, and the adaptability of the system to a complex operation environment is enhanced.

The utility model discloses a drive control circuit and auxiliary power supply, wherein including voltage comparison circuit and switching circuit, voltage comparison circuit exports the pilot signal when the voltage of power supply end of its power supply chip is no less than the preset drive voltage of drive switch tube, to make switching circuit make the circuit between the drive signal output end of power supply chip and the control end of drive switch tube conduct, and then make the drive signal of power supply chip output to drive switch tube control. Visible, the circuit between the drive signal output end of power supply chip and the control end of drive switch tube only conducts when the voltage of power supply end of power supply chip is no less than the preset drive voltage of drive switch tube, thereby guaranteeing that the voltage of drive signal of power supply chip to drive switch tube control is enough big, avoids drive switch tube and overheats damage because the voltage of drive signal is small and can not completely conduct.

The utility model discloses an industrial workshop equipment foldable protective cover which comprises a top cover, the inner surface of the top cover is in meshed connection with a first side plate, the lower surface of the top cover is in meshed connection with a second side plate and a third side plate, the outer surface of the second side plate is in threaded connection with a threaded rod, the outer surface of the first side plate is provided with a threaded groove, and the outer surface of the third side plate is provided with a threaded rod. The threaded rod is in threaded connection with the threaded groove, a lock hole is formed in the outer surface of the third side plate, and a key is arranged on the inner surface of the top cover. An air blower is fixedly connected to the upper surface of the top cover, an air inlet pipe is fixedly connected to the output end of the air blower, an air nozzle is fixedly connected to the side, away from the output end of the air blower, of the air inlet pipe, and a heat dissipation opening is formed in the outer surface of the top cover. Through the components, the device can be folded, the occupied space is reduced, the device can be unfolded and folded conveniently, and operation is convenient and fast; and the equipment can be cooled and prevented from being damaged due to overheating, and the service life of the equipment is prolonged.

The utility model discloses a cooling structure for centrifugal blower, including cooling heat exchange cylinder, cooling heat exchange cylinder inside is hollowed out structure design, and the inside fixed mounting of cooling heat exchange cylinder has heat exchange pipe, and heat exchange pipe adopts spiral structure design, and the top of heat exchange pipe is fixedly connected with liquid inlet pipeline through flange, and the top of liquid inlet pipeline is provided with liquid inlet and passes cooling heat exchange cylinder, and the bottom of heat exchange pipe is fixedly connected with liquid outlet pipeline through flange, and the top of liquid outlet pipeline passes cooling heat exchange cylinder, and the top of liquid outlet pipeline is provided with liquid outlet, and the liquid inlet and liquid outlet are connected through circulation pipeline and circulation pump, and the heat exchange pipe is provided with flowing coolant, and the utility model discloses low temperature liquid in circulation pipeline can be heat treated with centrifugal blower, thereby can help centrifugal blower to carry out water -cooled heat exchange cooling and cooling, help centrifugal blower to carry out the quick cooling work, avoid centrifugal blower overheating damage.

The utility model discloses a kind of power distribution network grid load forecasting device, including predictor main part, the predictor main part inner wall is fixedly connected with display screen, the predictor main part inner wall is fixedly connected with control button, the predictor main part bottom is fixedly connected with fixed box, the fixed box surface is fixedly connected with support column, heat transfer in predictor main part is into heat exchange mechanism, start refrigeration mechanism to reduce the temperature of cooling liquid inside liquid storage tank, while starting stirring assembly to stir cooling liquid to improve cooling efficiency, start water circulation component to suck cooling liquid into heat exchange mechanism, heat exchange work is carried out by cooling liquid and heat exchange mechanism, it can be to predictor main part inside carry out quick cooling heat dissipation work, the goal of being convenient for to load forecasting device carry out quick heat dissipation cooling work is realized, avoid the heat dissipation demand of prediction device from being unable to meet due to air cooling heat dissipation under high temperature environment, to cause load forecasting device to be prone to overheat damage problem when using.

The utility model discloses a kind of automatic continuous filling's corpse antiseptic high-pressure perfusion device, including liquid storage tank, medicament box, automatic liquid preparation liquid filling device, medicament box is sequentially connected liquid storage tank by medicament branch pipe, first solenoid valve, first flowmeter, medicament main pipe, the upper portion of liquid storage tank is connected distilled water tank by water pipe, second flowmeter, second solenoid valve;Automatic liquid preparation liquid filling device includes liquid pump, controller and liquid level sensor, the import of liquid pump is connected liquid storage tank by liquid extraction pipe, the outlet of liquid pump is connected perfusion needle by gate valve, liquid guide pipe, hose;Liquid level sensor is arranged in liquid storage tank, and upper and lower limit switch of liquid level sensor is electrically connected with first solenoid valve, second solenoid valve, liquid pump switch and controller respectively.The utility model integrates automatic liquid preparation and high-pressure liquid filling function, can continuously, stably obtain sufficient perfusion fluid supply, realizes high pressure, automatic, continuous perfusion, improves perfusion efficiency and uniformity.

This application relates to a DC motor vibration damping base, belonging to the field of motor support and protection technology. It includes a base, a clamping device disposed on the base for holding the DC motor, a heat dissipation device disposed within the base for cooling the clamped DC motor, and a vibration damping device disposed at the bottom of the base for damping the vibration of the base. The base also has a placement cavity for placing the DC motor. The clamping device includes a first clamping component disposed within the base and a second clamping component linked to the first clamping component for clamping both sides of the DC motor. The heat dissipation device includes a first heat dissipation component, a first air inlet component, and a fan. The vibration damping device includes a first hydraulic component disposed at the bottom of the base and limiting buffer components disposed on both sides of the base. This application achieves the effects of stable clamping of the DC motor, efficient heat dissipation, and good vibration damping, ensuring more stable operation of the DC motor.

This invention relates to the field of circuit design technology, and more particularly to a reverse polarity protection circuit, a switching module, and its application circuit. The reverse polarity protection circuit includes: a first NMOS transistor MN1, a second NMOS transistor MN2, a third NMOS transistor MN3, a fourth NMOS transistor MN4, a fifth NMOS transistor MN5, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first resistor R1, a second resistor R2, a third resistor R3, a fifth resistor R5, a first PMOS transistor MP1, and a second PMOS transistor MP2. This invention actively turns on the power transistors when a reverse polarity event occurs, forming a low-resistance path to replace the body diode's conduction, thereby significantly reducing power consumption. In all operating states (normal on / off, inductive load, reverse polarity), the gate-source and drain-source voltages of each MOS transistor remain within safe ranges, with no risk of overvoltage. It can be applied to standard processes, reducing manufacturing costs and design complexity.

This utility model relates to the field of electronic components and discloses an electronic component with a protective structure, including a circuit board and a protective cover. The component body is fixedly mounted on the upper end of the circuit board. A mounting hole is provided on the upper end of the protective cover. A filter screen is fixedly mounted on the upper inner side of the mounting hole. A motor is fixedly mounted at the lower center of the filter screen. A fan is fixedly fitted onto the output end of the motor. Fixed posts are fixedly mounted on both sides of the inner perimeter of the protective cover. Springs are mounted at the bottom of the inner ends of multiple fixed posts. Movable posts are fixedly mounted at the front ends of multiple springs. Clamping plates are fixedly mounted at the front ends of each pair of movable posts. Connecting blocks are fixedly mounted on the lower ends of both sides of the outer perimeter of the protective cover. In this utility model, the fan can quickly cool the component, preventing overheating damage, and the movable posts can move within the fixed posts, preventing spring displacement.

The utility model relates to the technical field of environment simulation test equipment, and particularly discloses a sealing environment bin with a multilayer sealing structure, which comprises a box body, a box door with a double-open structure is arranged at the front end of the box body, a silica gel sealing ring is embedded in the inner side of the box door, and a fluororubber sealing ring is embedded in the outer side of the box door. An air cylinder is installed at the top of the front end face of the box body, the side wall of the box body communicates with a connecting pipe, and through the design of a multi-layer sealing box door, a pipeline composite sealing connector and an optimized air duct circulating system, the overall sealing reliability and the temperature field uniformity of the environment bin under extreme temperature alternation are remarkably improved; the cold and hot dual-mode temperature control system achieves more efficient and accurate temperature regulation and control, the heat preservation box wall reduces energy consumption, the operability and safety of the equipment are improved through the convenient control system and the safety observation window, the problems that traditional equipment is prone to failure in sealing, low in temperature control efficiency and lack of protection are solved, and the service life of the equipment is prolonged. And the accuracy and the reliability of sealing performance testing of products such as fasteners are improved.

This application relates to power conversion and regulation technology in the field of power electronics, particularly in the field of frequency converters. The current sharing control logic of this application no longer relies on pure software calculation and adjustment. Instead, it uses hardware circuits (sampling circuit, reference voltage calculation circuit, and current sharing judgment circuit, etc.) to monitor the voltage status of each parallel power unit in real time. Based on the comparison results of the sampled voltage with the upper and lower threshold voltages, it immediately and automatically adjusts the PWM duty cycle corresponding to the power unit to perform current sharing regulation. This adaptive adjustment mechanism based on real-time feedback can automatically compensate for current imbalances caused by differences in module parameters, load changes, or temperature drift, causing the current of each parallel power unit to automatically converge and stabilize near the average value. This effectively prevents a single power unit from overheating and being damaged due to long-term overcurrent, significantly improving the overall reliability of the parallel system and the service life of the modules.

The utility model discloses a short circuit and reverse connection protection system for an automobile emergency starting power supply, which comprises an automobile emergency starting power supply, a micro-control unit, an MOS (Metal Oxide Semiconductor) tube, an optocoupler, a Hall sensor, a relay, a triode, a temperature sensor, a wireless communication unit and the like, and can distinguish short circuit and reverse connection conditions and take different protection measures. When the polarity of the battery is reversed, the optocoupler cuts off a signal, and the micro-control unit controls the MOS tube to be disconnected to prevent current from flowing backwards; when a short circuit occurs, the Hall sensor detects an abnormal current, and the micro-control unit controls the MOS tube to be disconnected, thereby preventing overcurrent damage. The temperature sensor monitors the temperature of the MOS tube in real time, and the relay disconnects the circuit when the limit is exceeded, thereby preventing overheating damage. The wireless communication unit supports Bluetooth or WiFi, and can remotely monitor the equipment state and control the power supply. The automobile emergency starting power supply has short circuit, reverse connection, overcurrent and over-temperature protection functions, the safety and intelligence of the automobile emergency starting power supply are improved, and the automobile emergency starting power supply is simple in structure, rapid in response and suitable for wide market requirements.

This invention discloses an ultrasonic-assisted solid-state water electrolysis online hydrogen production device and method. The device includes a water electrolysis reactor and a water tank, with the reactor fixedly installed in the water tank. The lower part of the reactor is filled with a bed of water electrolysis material. A hydrogen outlet is located at the upper end of the reactor, and a water inlet is located at the lower end. A peristaltic pump is connected to the reactor inlet and is located in the water tank. An ultrasonic transducer is installed on the outer wall or bottom surface of the reactor. By installing an ultrasonic transducer on the outside of the reactor, the high-frequency vibration of the ultrasonic bed during the water electrolysis process effectively reduces the non-uniform water diffusion caused by material agglomeration, adhesion, and byproduct coverage. This allows water to diffuse uniformly to the material surface, resulting in a stable hydrogen production reaction and improving the stability of hydrogen supply. Ultrasonic waves also enhance the thermal conductivity of the water electrolysis material bed, improving the thermal management of the reactor during the water electrolysis process.

The application provides a rainproof and dustproof multi-rotor unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicles. The rainproof and dustproof multi-rotor unmanned aerial vehicle comprises a vibration cavity type airflow sound wave generator, a sound wave guide pipe network, a radiation hole, a compressed air storage tank and a control unit arranged in a machine body, the sound wave guide pipe network is distributed in the machine body and a machine arm, the radiation hole is directed to the outer surface of the machine body and the machine arm, and the control unit controls the vibration cavity type airflow sound wave generator to work in a frequency conversion scanning mode after the unmanned aerial vehicle lands and the motor stops rotating. The frequency conversion sound wave is automatically generated after the machine stops, radiated to the outer surface of the machine body through the guide pipe network, and used for forced vibration and falling of the attached dust, so that automatic dust removal of the whole machine body is realized, manual cleaning is not needed, and the continuous operation capacity and use convenience of the unmanned aerial vehicle in a high dust environment are significantly improved.

The utility model relates to a temperature control heating circuit, which comprises a first voltage division module, a second voltage division module, a temperature sensor, a first comparator, a second comparator, a heating module and an MOS (Metal Oxide Semiconductor) tube, the temperature control heating circuit is ingenious in design, when the environment temperature is lower than a first temperature preset value, the first comparator can output a high-level signal, the MOS tube controls the heating module to start heating, a CPU or the circuit is prevented from being damaged due to too low temperature, and the purpose that the heating module is started at low temperature to heat the CPU and related circuits can be easily achieved; similarly, when the temperature is higher than a second temperature preset value, the second comparator outputs a low-level signal, and the MOS tube controls the heating module to stop heating, so that overheating damage is avoided, heating lags behind 20 DEG C, and heating is automatically stopped after circuits such as a CPU (Central Processing Unit) and the like work normally; according to the utility model, the product can work normally in a severe environment, the stability of the product is ensured, an industrial MCU and a flash chip are omitted, the material cost of the product is reduced, and the market competitiveness is improved.

The utility model discloses a coal mine moisture detection device, which relates to the technical field of coal mine detection and comprises a detection shell, a detection groove is arranged in the middle of the detection shell, a barrel is rotatably arranged in the detection groove, a rotating rod is rotatably arranged in the middle of the barrel, and a plurality of stirring blades are uniformly and fixedly connected to the periphery of the rotating rod. Four heating rods are uniformly and fixedly connected to the side wall of the detection groove; the bottom surface of the outer wall of the barrel body is fixedly connected with a first shaft sleeve, two sides of the first shaft sleeve are provided with clamping grooves, the bottom surface of the detection groove is rotatably connected with a second shaft sleeve, two sides of the top surface of the second shaft sleeve are fixedly connected with clamping blocks, the clamping blocks are inserted into the corresponding clamping grooves, and the interior of the second shaft sleeve is rotatably connected with a connecting rod. According to the coal sample drying device, the rotating barrel body enables a coal sample to roll continuously in the drying process, the contact area of the sample and hot air is increased, the stirring blades which rotate reversely further scatter the sample, coal particles are prevented from being agglomerated, heat transfer is more sufficient, the water evaporation speed is increased, and the drying efficiency is improved.

The utility model relates to polyurethane raw material production field, concretely to a kind of melting equipment of polyurethane raw material production, including for the adaptive stirring of polyurethane raw material Follow-up stirring mechanism and for the adjustment of bottom material with Follow-up stirring mechanism to cooperate bottom adjustment mechanism, stirring drum is slidably arranged on the heating base of heating mechanism, power mechanism is arranged on the upside of stirring drum, the shaft bottom of power mechanism is connected with Follow-up stirring mechanism, the bottom of Follow-up stirring mechanism is connected with bottom adjustment mechanism.The utility model can change state adaptively through the middle supporting spring when stirring, mixing and heating in the three states of polyurethane raw material melting process, so that the raw material in different states can be effectively heat exchanged in time, thereby improving the efficiency of melting and avoiding raw material overheating damage.

This utility model discloses an outdoor electromagnetic lock with an outer protective cover, including a semi-open protective cover. Two semi-open protective covers are inserted and sealed to the outside of the outdoor electromagnetic lock. A sealing rubber plug ring is set at the reset knob on the outdoor electromagnetic lock, and a sealing gasket is set at the latch on the outdoor electromagnetic lock. A foam layer is filled between the two semi-open protective covers and the outdoor electromagnetic lock. This utility model has a semi-open protective cover, a sealing rubber plug ring, and a sealing gasket. The foam layer fills the space between the two semi-open protective covers and the outdoor electromagnetic lock. The sealing rubber plug ring and the sealing gasket seal the connection between the reset knob and the latch and the semi-open protective cover, providing all-round sealing protection for the outdoor electromagnetic lock. This reduces the corrosion and impact of moisture and dust particles on the outdoor electromagnetic lock's extension and contraction stroke. The filling of the foam layer improves the sealing performance and ensures the normal use of the outdoor electromagnetic lock.

A GIS electromagnetic voltage transformer field induction withstand voltage test system and method, including an electromagnetic voltage transformer secondary side winding including an auxiliary winding and a plurality of non-assisted windings; a variable frequency power supply unit connected with the electromagnetic voltage transformer secondary side auxiliary winding, for outputting a continuous adjustable sine wave voltage; a tunable resonance compensation inductance unit containing a plurality of inductance modules, each inductance module being respectively connected in parallel with an electromagnetic voltage transformer secondary side winding, and the inductance of each inductance module being adjustable; a multi-parameter monitoring unit for respectively collecting voltage effective value, current effective value and power factor data of each secondary side winding in real time; and an intelligent control unit for dynamically adjusting the output frequency of the variable frequency power supply unit and the inductance of the tunable resonance compensation inductance unit according to the data monitored by the multi-parameter monitoring unit. The application ensures accurate conversion of primary side withstand voltage value and improves the reliability of insulation test.

The utility model relates to the technical field of heat preservation bags, and discloses an electric heating heat preservation bag with a protection function, which comprises a heat preservation bag body, a bag cover and a placing basket, the placing basket is arranged at the bottom end in the heat preservation bag body, a fixing mechanism is arranged at the upper end in the heat preservation bag body, and a damping mechanism is arranged at the bottom end of the outer wall of the heat preservation bag body. The fixing mechanism comprises partition plates, and the two sides of the inner wall of the heat preservation bag body are rotationally connected with the partition plates. According to the heat preservation bag, the heat preservation bag can be divided into an upper layer and a lower layer according to needs through mutual cooperation of the clamping blocks, the partition plates and the magnets, so that waste of the internal space of the heat preservation bag is avoided, and then through mutual cooperation of the springs, the sliding rods, the connecting plates and the rotating bases, when the heat preservation bag falls onto the ground, shock absorption is achieved through spring contraction; and through mutual cooperation of a heating block, a heat conduction plate and a placement basket, the food can be heated and subjected to heat preservation, and the food is prevented from being cooled.

A cable with a wide applicable temperature range, belonging to the cable industry, has a structure including a conductor layer, a binding layer, an insulation layer, and a flat sheath layer. The conductor layer is formed by stranding multiple metal wires to form a spiral current-conducting structure. The binding layer wraps around the conductor layer. The insulation layer includes an insulating inner tube wrapped around the binding layer and an insulating outer tube wrapped around the insulating inner tube. The insulation layer in the stranded flat cable is composed of an insulating inner tube and an insulating outer tube. The insulating inner tube and the insulating outer tube have eccentric cavities with their centers offset from each other, so that the wall thickness of the insulation layer is the same as the wall thickness of the single-layer insulation sheath in the prior art, without affecting the thickness of the flat portion of the flat sheath layer. While strengthening the insulation performance, it also has strong tear resistance. A temperature response unit for positioning the binding layer connection is provided on the inner wall of the cavity at the thickest position of the insulating inner tube, which can perform rapid high-temperature response and effectively prevent the cable from being damaged by overheating.

The utility model discloses a rotary kiln combustor, which belongs to the technical field of rotary kiln combustors and is characterized in that a pre-combustion chamber is arranged at the flame end of a combustor cavity, a primary cooling air duct is arranged outside the combustor cavity, a secondary cooling air duct is arranged outside the pre-combustion chamber, and the primary cooling air duct is communicated with the secondary cooling air duct. An air inlet is formed in the first-stage cooling air duct and connected with cooling air supply equipment. By arranging the pre-combustion chamber and the cooling air system, the problems of unstable combustion of pulverized coal in the rotary kiln, disturbance of flue gas and dust, oxygen consumption and the like are solved, and the flame stability during combustion is enhanced.

The utility model discloses a vacuum heat treatment furnace, belongs to the field of heat treatment equipment, and is used for solving the problem of flow abnormity caused by uneven cooling water distribution, cooling temperature control deviation and waterway blockage. The vacuum heat treatment furnace comprises a furnace body, a cooling water using part and a cooling water distribution system, wherein the cooling water distribution system comprises a water inlet pipe, a water return pipe, a water pump, a water inlet branch pipe, a water return branch pipe, a flow detection device, a temperature detection device and a control device; the water inlet pipe, the water return pipe, the water inlet branch pipe and the water return branch pipe are arranged outside the vacuum heat treatment furnace; one end of the water inlet branch pipe is connected with the water inlet pipe, and the other end is connected with the water inlet end of a water using part; one end of the water return branch pipe is connected with the water return pipe, and the other end is connected with the water outlet end of a water using component; the flow detection device is connected with the water return branch pipe; the temperature detection device is arranged on the water consumption part; the flow detection device, the temperature detection device and the water pump are all electrically connected with the control device.

The application relates to the technical field of data center liquid cooling, and provides a liquid cooling energy distribution system and a control method thereof. The liquid cooling energy distribution system comprises a case, a primary side loop, a secondary side loop, a heat exchange module, an adjusting module and a control module. The heat exchange module has a flat structure and is internally provided with a plurality of parallel micro flow channels to reduce pressure drop. The actuator of the adjusting module is installed laterally offset in the horizontal direction. The control module is configured to acquire an environmental dew point parameter and a secondary side fluid temperature parameter and monitor the running state of a circulating pump. In response to determining that there is a risk of dewing and the circulating pump reaches a preset lower limit of safety, the control module controls the adjusting module to limit or cut off the primary side flow and maintains the circulating pump to run at the lower limit of safety. The application realizes high-throughput low-flow-resistance heat exchange and dewing prevention self-healing control in a compact space.