39results about How to "Avoid overheating damage" patented technology

The invention discloses a protective photovoltaic cable, relates to the technical field of photovoltaic cables, and aims to provide a protective photovoltaic cable capable of reflecting light and preventing ultraviolet rays from damaging the cable. The protective photovoltaic cable is technically characterized by comprising a battery cell assembly, and a heat insulation assembly is arranged on the outer side of the battery cell assembly; a binding assembly for fixing the position of the heat insulation assembly is arranged on the outer side of the heat insulation assembly, the outer side of the binding assembly is wrapped with an outer polyethylene protection layer, and a reflection assembly is arranged on the outer side of the outer polyethylene protection layer. The technical effects are that infrared rays and ultraviolet rays in illumination can be efficiently reflected through the reflection assembly and the aluminum foil reflection layer, the problem that the ultraviolet rays irradiate on the cable to cause accelerated aging of the cable is avoided, and the infrared rays are reflected to greatly block heat from being transmitted to the cable, so that aging of the cable due to the influence of the ultraviolet rays is prevented; and the problem of temperature rise due to the influence of infrared rays is solved.

The utility model belongs to the technical field of speed reducers, and particularly relates to a heat dissipation protection shell of a speed reduction motor, which comprises a speed reducer body and a heat dissipation shell body, the heat dissipation shell body is fixedly sleeved on the speed reducer body, the bottom of the heat dissipation shell body is fixedly connected with a heat dissipation base, the front side and the rear side of the heat dissipation shell body are respectively provided with an installation hole, and the installation holes are communicated with the heat dissipation base. Cooling fans are fixedly mounted in the two mounting holes; four round pipes are fixedly connected to the front side and the rear side of the heat dissipation shell correspondingly, dustproof filter screens are arranged on the front side and the rear side of the heat dissipation shell correspondingly, two connecting blocks are fixedly connected to the bottoms of the dustproof filter screens, and round shafts are fixedly connected to one sides of the two connecting blocks correspondingly. By means of the simple structure, dustproof operation on the interior of the heat dissipation shell is achieved when the heat dissipation fan runs, normal heat dissipation of the speed reducer body is guaranteed, the speed reducer body is prevented from being damaged due to overheating, the protection effect is good, and practicability is high.

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 an oil-immersed transformer oil tank internal temperature field distribution detection method and system, and the method comprises the following steps: 1) manufacturing a distributed temperature measurement device, and placing the distributed temperature measurement device in an oil tank, so as to detect the temperature data of the front and side surfaces in the transformer oil tank; 2) connecting the distributed temperature measuring device with an external demodulation unit to obtain temperature data, performing data cleaning on the obtained temperature data, and removing abnormal temperature data; and 3) performing grid division on the front surface and the side surface in the oil tank, calculating grid type temperature data of each grid point based on the cleaned temperature data, and drawing a temperature field distribution cloud picture in the transformer oil tank based on the grid type temperature data. Partial discharge caused by insulation damage due to the fact that the optical fiber is directly installed on the winding and the iron core can be effectively avoided, insulation of the winding and the iron core is not affected once the optical fiber is damaged, temperature field distribution in the oil tank can be accurately obtained, and the device has the advantages of being safe, efficient, easy to replace, high in measurement precision and the like.

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 invention relates to the technical field of card swiping machine magnetic head production, in particular to card swiping magnetic head drying equipment beneficial to energy conservation, by additionally arranging a cavity between a first box body and a second box body, when a fan sucks air to conduct drying operation, external air can flow in from the cavity, and when a tray passes through the cavity leftwards, the external air can flow in from the cavity; the tray can be cooled through the air flow in the cavity, so that the tray can be transferred to the next process without waiting for the temperature drop of the tray, the production efficiency is improved, the air flow can carry heat on the tray to the external heat collection system, and the external heat collection system converts the heat energy on the tray into electric energy to be stored. The energy utilization rate is improved, and energy conservation and emission reduction are facilitated; a card swiping magnetic head drying device facilitating energy saving comprises an electric roller, a conveying belt, a first flow guide plate, a first partition plate, a second partition plate and a conveying assembly. At least two electric rollers are mounted on the box body I; and a plurality of conveying belts are wound on all the electric rollers.

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.

The utility model discloses a semiconductor crystal growing furnace, and relates to the technical field of semiconductor crystal growing furnaces. The growth furnace comprises a growth furnace body, a refrigeration circulation cavity is formed in the right side of the upper side in the growth furnace body, a refrigeration sheet cavity is formed in the right side of the inner wall of the refrigeration circulation cavity, and an electric pump cavity is formed in the left side in the growth furnace body. The semiconductor crystal growth furnace has the advantages that the problem of poor heat dissipation performance of equipment due to absence of a circulation structure in a traditional semiconductor crystal growth furnace is solved, the heat dissipation effect of the equipment is improved, the problems of possible overheating and even possible damage to the internal structure of the equipment in the use process of the traditional equipment are solved, the quality of products manufactured by the equipment is guaranteed, and the production cost is reduced. And the use efficiency of the equipment is improved, the stability and safety of the equipment in the use process are guaranteed, the service life of the equipment is prolonged, and the use effect of the equipment is greatly improved.

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 abrasive paper production, in particular to environment-friendly water-based abrasive paper with recyclable base paper, which mainly comprises a polishing seat, a manipulator mounting groove, a feeding roll mounting groove, a receiving roll mounting groove, an abrasive paper feeding roll, an abrasive paper receiving roll, the base paper, an abrasive material layer, a bearing plate, a heat dissipation through hole and a window. The base paper is driven to horizontally move in the window through cooperation of the abrasive paper feeding roll and the abrasive paper receiving roll, so that the abrasive material layer with the seriously-abraded surface is rolled up by the abrasive paper receiving roll, a new abrasive material layer is released into the window by the abrasive paper feeding roll, automatic replacement of the water-based abrasive paper belt is conducted in the mode, the base paper cannot be discarded in the replacement process, and the replacement efficiency is improved. Therefore, resources are saved, wastes are reduced, energy consumption is reduced, and cost is saved. And meanwhile, heat of the water-based abrasive paper belt in the polishing process is rapidly transferred through the bearing plate and the heat dissipation through holes, and the water-based abrasive paper belt is prevented from being damaged due to overheating.

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 invention provides a 3D printer powder spreading device scraping strip flattening device, and relates to the technical field of 3D printers, the 3D printer powder spreading device scraping strip flattening device comprises a powder box, the front face of the powder box is fixedly connected with a fixing block, the top of the fixing block is movably connected with a scraping plate, the back face of the powder box is provided with a clamping groove, and the interior of the clamping groove is movably connected with a clamping block; one end of the clamping block is fixedly connected with a fixing seat, the front face of the fixing seat is fixedly connected with a connecting block, the front face of the connecting block is movably connected with a movable block, one side of the movable block is fixedly connected with a positioning plate, the front face of the fixing seat is fixedly connected with a sliding rail, and the inner wall of the sliding rail is movably connected with a sliding block. According to the 3D printer powder spreading device scraping strip flattening device, the purpose of effectively flattening a scraping strip of a powder spreading device can be achieved, the problem that the scraping strip needs to be installed multiple times due to the fact that the height of the scraping strip is inconsistent in the installation process is solved, and therefore the powder spreading efficiency is effectively improved, and the powder spreading work requirement can be met.

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 utility model discloses an intelligent traffic light control device which comprises a control cabinet base, a control cabinet body is fixedly installed on the control cabinet base, a heat dissipation mechanism is fixedly installed on the side wall of the control cabinet body, and the heat dissipation mechanism comprises an air inlet cylinder fixed to the side wall of the control cabinet body. A positioning seat is arranged at the edge of one end of the air inlet cylinder, a dustproof net is arranged on the positioning seat, a sealing ring is arranged at one end of the air inlet cylinder, a cooling fan is arranged in the air inlet cylinder, and a sealing mechanism is arranged at the air inlet cylinder on the control cabinet body. According to the intelligent traffic light control device, after the armature block is released, the spring push rod pushes the sealing end cover to move forwards to be far away from the air inlet cylinder, the heat dissipation fan can be started after the sealing end cover is far away from the air inlet cylinder, and after the heat dissipation fan is started, external air can be blown into the control cabinet body, so that the heat dissipation efficiency is improved; and components in the control cabinet body are prevented from being damaged due to overheating.

The utility model relates to the technical field of power amplifiers, in particular to a noise reduction case of a power amplifier, which comprises a power amplifier body and a noise reduction case used for reducing noise of the power amplifier body, the noise reduction case comprises a protection case body, and a supporting assembly used for supporting the power amplifier body is arranged in the protection case body. According to the power amplifier, an additional mechanical structure is not needed, materials are not needed, the cost is low, the porous structure and the large surface area of the three-dimensional nanocellulose layer arranged in the protection box body are adopted, and therefore the power amplifier has the advantages that the structure is simple, the cost is low, and the application range is wide. A large amount of sound waves can be absorbed, and the efficient noise reduction effect is achieved; the single radiator is arranged at the bottom of the power amplifier body in the protection box body and matched with the net-shaped uniform-temperature heat-conducting medium base body, so that the temperature of the surface of power amplifier equipment is reduced, and operation of the equipment is guaranteed.

The present invention relates to a method, system, device and medium for controlling heat dissipation of a smart tablet, and relates to the field of heat dissipation control, including: when the smart tablet is running, receiving the current operating status of each tablet heat source and the predicted temperature at the last moment; collecting the ambient temperature, and based on the ambient temperature and heat source temperature prediction model, predicting the temperature of each heat source to obtain the temperature value of each heat source; analyzing and obtaining the target heat dissipation rate and the heat dissipation rate threshold; when the target heat dissipation rate is greater than or equal to the threshold and the deviation between the two is greater than or equal to the preset value, sending an overheating risk signal to the visualization interface for early warning. The present application solves the technical problem in the prior art that the heat dissipation monitoring range of the smart tablet is not comprehensive and it is difficult to accurately warn of overheating risks due to the limited arrangement position of the temperature sensor. By constructing a heat source temperature prediction model and heat dissipation rate analysis, the comprehensive temperature monitoring of each heat source inside the smart tablet is achieved, and the technical effect of improving the accuracy of the overheating risk early warning is achieved.

This utility model relates to the field of rotary joint technology and discloses a rotary joint, including a joint body, an adjusting component, a cooling component, and a locking component. The adjusting component is installed inside the joint body, the cooling component is installed inside the joint body, and the locking component is installed inside the cooling component. This utility model has the following advantages and effects: The adjusting component cooperates with the adjusting ring through the connecting column, which facilitates the adjustment of the axial position of the connecting pipe, allowing for adjustment and installation even when there is a certain distance between the rotary joint and the pipes on both sides, without affecting the installation of the rotary joint. At the same time, the cooling component cooperates with the filter frame through the cooling pipe to achieve cooling and heat dissipation inside the joint body, avoiding overheating and damage to the internal structure of the joint body, and preventing impurities from entering the cooling pipe and causing blockage, thus affecting the cooling and heat dissipation of the joint body.

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.