16results about How to "Avoid thermal damage" patented technology

The invention provides a linear voltage regulator and a voltage stabilization regulation method. The linear voltage regulator comprises a voltage stabilization module, a first acquisition module, a second acquisition module and a comparison regulation and control module, the voltage stabilizing module receives an input voltage signal and a control signal, and is used for stably adjusting a voltage amplitude to a preset value and adjusting a current value of the voltage stabilizing module based on the control signal; the first acquisition module and the second acquisition module are respectively used for acquiring current signals and voltage difference signals and outputting the current signals and the voltage difference signals to the comparison regulation and control module; the comparison regulation and control module simultaneously receives the current signal and the voltage difference signal, processes the current signal and the voltage difference signal to obtain a current-limiting value of the voltage-stabilizing module, and outputs a control signal based on the current-limiting value. According to the linear voltage regulator, the loaded voltage difference signal is detected, the current limiting value is dynamically adjusted, the current of the linear amplifier is limited, device damage and even load short circuit and overload caused by too large current are avoided, and the problem that the linear amplifier is possibly heated and damaged due to too large power is also avoided.

The utility model discloses a terminal protection device and a terminal, and belongs to the technical field of terminals. A first position of an antenna section in the terminal is connected with a grounding switch in the protection device, and the first position is located at a non-endpoint position of the antenna section; the protection device obtains the use condition of the antenna section, wherein the use condition comprises power and / or temperature; and under the condition that the use condition meets an antenna protection condition, the grounding switch is switched on to change the working frequency of the antenna section, and the antenna protection condition comprises that the power exceeds a power threshold value and / or the temperature exceeds a temperature threshold value. Namely, the grounding switch is connected to the first position of the antenna section in the terminal, so that the grounding switch is switched on under the condition that the terminal needs to be protected, the working frequency of the antenna section is changed, the resonance state of the antenna section is broken, the antenna section is prevented from being coupled with high-intensity electromagnetic waves, and the antenna section is prevented from being heated and damaged.

The invention relates to the technical field of automobile production and manufacturing, in particular to a suspension spot welder switch linkage mechanism which comprises a lever structure and a transmission structure. The lever structure is arranged on the suspension spot welding machine, and when the operation end is close to or far away from the suspension spot welding machine, the driving end is far away from or close to the suspension spot welding machine; the transmission structure is rotationally arranged on the driving end; two connecting ends are arranged on the transmission structure; the two connecting ends are connected with a water unit and an electric unit of the suspension spot welding machine correspondingly, and the water unit and the electric unit of the suspension spot welding machine are driven to be opened or closed through movement of the two connecting ends. And switches of the water unit and the electric unit can be simultaneously driven to be turned on or off. And the operation process that an operator omits to turn on a switch of a water unit after turning on a switch of an electric unit is avoided, so that the electrode stem is maintained to be cooled when the suspended spot welding machine is used, the electrode stem is prevented from being overheated, the welding spot quality of welding is ensured, and the cable is prevented from being heated and damaged. In addition, the structure is simple, and installation and implementation are convenient.

The utility model belongs to the technical field of motors, and particularly relates to a motor iron core with a liquid cooling structure, which comprises a main body and a liquid cooling assembly arranged in the main body, the liquid cooling assembly comprises a plurality of first guide pipes of U-shaped structures installed in the main body and two second guide pipes installed at the positions of the U-shaped structures of the first guide pipes, cooling liquid is injected into first heat conduction pipes and second heat conduction pipes in the main body, and heat on the main body is absorbed into the cooling liquid in a conduction mode. The heat dissipation range is expanded through the heat dissipation plate and the heat dissipation fins on the surface of the heat dissipation plate, the heat dissipation effect is improved, the main body is prevented from being damaged due to the fact that the main body exceeds a rated value, when the main body is not placed in the motor shell, the screw rod does not make contact with the movable rod, and after the main body is placed in the motor, the bolt is rotated to push the movable rod, and the movable rod is pushed to move. And the moving rod pushes the fixing frame, so that the fixing frame can be clamped in the motor shell, and the main body is prevented from shaking after being mounted.

The present application relates to the technical field of automatic cutting equipment control, and discloses a cutting control method and system for an automatic cutting bubble press, the method comprising collecting resistance data and material surface signals by a sensor array, determining material hardness and toughness through sensor fusion and neural network after synchronous denoising processing, calculating depth adjustment increment in combination with cutter parameters when exceeding the limit, optimizing cutting speed in combination with thermal and cutting force parameters through synchronous simulation, forming a comprehensive scheme, feeding back evaluation accuracy, optimizing physical properties when not meeting the standard, and iteratively determining final parameters to realize stable cutting. The method can adapt to material characteristic fluctuations in real time, suppress thermal and cutting force abnormalities, improve cutting stability and accuracy, reduce waste rate and cutter wear, and ensure consistency and production efficiency of complex material processing.

The invention discloses a high-fidelity audio power line and a preparation method thereof. The power line is prepared by coating a plurality of metal copper wire cores with a PVC insulation layer, and coating a protective shell on the outside of the PVC insulation layer. The protective shell comprises the following raw materials in parts by weight: 100-120 parts of PVC masterbatch, 4-6 parts of flame retardant, 4-6 parts of heat stabilizer, 0.2-0.5 parts of antioxidant and 30-40 parts of plasticizer. When the flame retardant is burned, organic phosphorus is contained in the molecule, and phosphoric acid, polyphosphate and other substances can be formed during combustion. The formation of a carbon layer is accelerated by catalyzing the dehydration and decomposition of a polymer. Nitrogen and boron elements are contained, and the compactness of the carbon layer can be increased. Meanwhile, transition metal cobalt is contained, and the emission of smoke can be reduced, so that the power line is prevented from burning due to a short circuit. A large amount of polyurea structures are contained in the heat stabilizer. The nitrogen atoms in the polyurea structures can replace unstable Cl atoms in PVC, thereby increasing the stability of the PVC molecular chain.

The present disclosure relates to the field of photovoltaics, and provides a photovoltaic module which can at least improve output power and reliability. The photovoltaic module comprises a main busbar, a first part, a first bypass structure and a second part. The main busbar comprises a first polarity node and a second polarity node; the first part comprises a first cell string group unit and a second cell string group unit connected in series, the first cell string group unit comprises a first cell string group and a second cell string group connected in parallel, and the second cell string group unit comprises a third cell string group and a fourth cell string group connected in parallel; the first bypass structure is located between the first cell string group unit and the second cell string group unit and is electrically connected with the main busbar, the first bypass structure comprises a first diode, the first diode comprises a first polarity end and a second polarity end, the first polarity end is electrically connected with the second polarity node, and the second polarity end is electrically connected with the first polarity node; and the second part is electrically connected with the first part through the main busbar.

The invention provides a gas engine capable of combusting hydrogen. Comprises: a cylinder liner (14); a cylinder head (15); a gas injection valve (5) for injecting hydrogen gas; gas supply passages (32, 33) for supplying hydrogen gas to the gas injection valves; a block (7) which is fixed to the upper surface (15a) of the cylinder head, into which the gas injection valve is inserted, and which is formed separately from the cylinder head; and sealing members (62, 63) for sealing a gap between the gas supply passage and the gas injection valve. The gas supply passage has a first gas supply passage (32) defined and formed inside the cylinder head, and a second gas supply passage (33) defined and formed inside the block and connecting the first gas supply passage and the gas injection valve, and the seal member is provided at a connection portion (S1) where the second gas supply passage and the gas injection valve are connected. Therefore, heat damage to the seal member can be suppressed while the gas supply passage is provided in the cylinder head.

According to the high-performance manufacturing equipment and method for the metal / non-metal heterogeneous component, a microstructure is prefabricated on the surface to be treated of the non-metal component, the physical and chemical state of the microstructure is designed, then the surface microstructure is compactly filled with coating metal through a chemical plating method, and a metal / non-metal initial interface is formed. And then, a high-precision stirring friction deposition process is adopted, target metal is subjected to thermal plasticizing under the shearing and extruding effects, and the target metal is deposited on the chemical plating layer of the non-metal workpiece. Under the thermal influence caused by the stirring friction effect in the deposition process, solid-phase welding of plated metal and deposited metal is achieved, the thermal effect generated in the deposition process can be transmitted to an initial interface of metal / nonmetal, formation of metal / nonmetal chemical bonding is promoted, meanwhile, the thermal effect acts on a prefabricated microstructure on the surface of the nonmetal, and the metal / nonmetal surface is formed. And the metal / non-metal interface is induced to form mortise and tenon interlocking, high-strength combination of the metal / non-metal interface is promoted, and finally high-performance manufacturing of the metal / non-metal heterogeneous component is achieved.

The present invention belongs to the technical field of printing machines, and specifically relates to a digital anti-counterfeiting printing device and a method of using the device, comprising a conveyor frame, a conveyor belt is arranged on the inner side of the conveyor frame, a support leg is fixedly connected to the lower end face of the conveyor frame, a support frame is fixedly connected to the middle parts of the front and rear sides of the upper end face of the conveyor frame, an inkjet printing mechanism is arranged on the middle part of the upper side of the support frame, and an ink protection stacking mechanism for storing inkjet-finished packaging boxes is arranged on the conveyor frame; the present invention realizes the use of the ink protection stacking mechanism, and can dry the ink after the anti-counterfeiting label is printed on the packaging box, thereby avoiding the situation that the ink layer falls off when the anti-counterfeiting label is accidentally touched by the hands of subsequent personnel, and by covering the anti-counterfeiting label first and then drying it, the hot air is more concentrated, and since the entire enclosure area is adjustable, it can adapt to anti-counterfeiting labels of different sizes, greatly reducing the range where the hot air is blown to other than the anti-counterfeiting label, thereby improving the drying speed.

The utility model relates to the technical field of control cabinets, and discloses a corrugated paper equipment control cabinet which comprises a control box, one side of the control box is rotatably connected with a control door, and one side of the control box is sequentially connected with a main switch, an early warning bell, a fan, a control panel and an operation box in an inserted mode from bottom to top. According to the utility model, the structure is reasonable, the temperature of the control panel is too high, the sensor sounds through the early warning bell to prompt workers that the temperature is too high to cut off power and reduce temperature so as to avoid overall damage, and the master switch is connected with the control panel to control overall power-off; the first switch set, the second switch set and the third switch set are fixed to the control panel through bolts, installation, disassembly and replacement are convenient, the maintenance speed is increased, the productivity is improved, when corrugated paper production equipment is repaired and maintained, an operator operation wire is taken out to be connected with a control cabinet, and power cannot be supplied to the control cabinet in a power-off mode; a worker starts the control cabinet to cause electric shock of the maintenance worker, thereby avoiding serious consequences which cannot be estimated.

This invention relates to the field of graphene processing technology, and more particularly to a method for low-temperature microwave exfoliation of graphene powder, comprising the following steps: dispersing natural graphite powder or expandable graphite in a solvent, wherein the solvent is selected from one of N-methylpyrrolidone, dimethyl sulfoxide, or a mixture of water and surfactant, and the mass concentration of graphite in the dispersion is 1-50 g·L. ‑1 The dispersion is pre-dispersed according to parameters determined by the optimized model, including but not limited to stirring power, ultrasonic power, and pre-dispersion time. The treated dispersion is then placed in a controllable power microwave reactor, and microwave energy is applied in pulses. The microwave power, pulse width, and number of cycles are determined according to equipment capacity and temperature control constraints. In this invention, by combining low-temperature pulsed microwaves with model-optimized pre-dispersion, graphite agglomerates are effectively reduced, thermal damage and structural defects are suppressed under controlled energy consumption and shear conditions, thereby improving the exfoliation efficiency and powder uniformity of monolayer and few-layer graphene.

The utility model provides a high-efficiency circulating heat radiation frequency conversion cabinet, relating to the frequency conversion cabinet technology field, the frequency conversion cabinet comprises a frequency conversion cabinet body, the side wall of the frequency conversion cabinet body is rotatably connected with a cabinet door through a hinge, the frequency conversion cabinet also comprises an air cooling heat radiation assembly and a liquid cooling heat radiation assembly, the air cooling heat radiation assembly comprises fan blades, a motor and a rotating shaft, the top wall of the frequency conversion cabinet body is rotatably connected with a rotating shaft through a bearing in a penetrating mode, the upper surface of the frequency conversion cabinet body is fixedly connected with a motor through a support, the part, located in the frequency conversion cabinet body, of the rotating shaft is fixedly connected with a plurality of fan blades, and the output end of the motor is fixedly connected with the rotating shaft. The liquid cooling heat dissipation assembly is arranged in the frequency conversion cabinet body and used for cooling the frequency converter through cooling liquid. According to the utility model, through the air cooling heat dissipation assembly and the liquid cooling heat dissipation assembly, air cooling and liquid cooling are carried out at the same time, the cooling effect of the frequency converter is improved, and the frequency converter can be prevented from being damaged by heating even in high-temperature weather.

This flow path forming plate is provided with: a gas passage surface; a rear end surface; a cavity into which cooling air can flow; and a cooling air passage through which the cooling air flowing into the cavity can flow. The cooling air channel is provided with a plurality of rear end spraying channels which are arranged in the side direction and open in the rear end face. And the plurality of rear-end injection channels comprise a plurality of small rear-end injection channels and a plurality of large rear-end injection channels. A part of the plurality of rear-end injection large channels among the plurality of rear-end injection large channels are disposed on the first-most side in the lateral direction and the second-most side in the lateral direction so as to be adjacent to each other in the lateral direction. And the channel sectional area of each channel in the plurality of rear-end injection large channels is larger than that of any channel in the plurality of rear-end injection small channels.

The utility model discloses a novel coaxial microwave transmission line protection mechanism, which belongs to the technical field of signal transmission mechanisms, solves the problem that a coaxial microwave transmission line in the prior art is wound, knotted and excessively bent to cause heating damage, and comprises a heat dissipation column and a microwave cable, the heat dissipation column is sleeved on the microwave cable, and the microwave cable is sleeved on the heat dissipation column. One end of the heat dissipation column is connected with a radio frequency connector, the interior of the radio frequency connector is in threaded connection with the outer side of the end of the heat dissipation column, the other end of the heat dissipation column is connected with a fixed end cover, the fixed end cover is fixedly connected to the end face of the heat dissipation column through a plurality of screws, and the fixed end cover is provided with a cable hole for a microwave cable to penetrate through. A protection sleeve is wound on the microwave cable, and the protection sleeve is composed of a PVC cable protection sleeve structure. According to the utility model, the PVC cable protective sleeve structure is adopted, the bending radius is large, winding and knotting are not easy, and the protective sleeve is simple in mounting and locking structure and small in size.

A blank mask according to an embodiment includes: a substrate; and a conductive layer disposed on the substrate, in which the conductive layer includes a first layer and a second layer having different conductivity, and the conductivity of the conductive layer is 500 S / cm to 2000 S / cm.