3629results about How to "Avoid burns" patented technology

The invention relates to an anti-static PP composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The antistatic PP composite material is prepared from the following components in parts by weight: 60 to 80 parts of PP resin, 10 to 20 parts of glass fiber, 0.1 to 0.5 part of a lubricant, 0.3 to 2 parts of a modified antistatic agent, 0.5 to 1.5 parts of a modified flame retardant and 0.2 to 0.8 part of an antioxidant, in the modified antistatic agent, an alkanolamide bond intermediate forms a conductive film, so that the resistivity is reduced, static dissipation is promoted, the material is endowed with lubricity, and the generation of static electricity is reduced; in addition, maleic anhydride forms a conductive layer and cooperates with quaternary ammonium salt to enhance hydrophilicity and accelerate charge transfer; a piperazine pyrophosphate derivative in the modified flame retardant and a phosphorus-nitrogen flame retardant cooperate to construct an expanded carbon layer to isolate a fire source and oxygen, so that the service life is prolonged; the anti-static PP composite material prepared by the invention not only has a good anti-static effect, but also has excellent flame-retardant and tensile properties.

The invention discloses a water jet assisted laser-electrochemical combined machining method which comprises the following steps: pre-treating a nickel-based superalloy to be machined, and fixing the nickel-based superalloy on a machining table; a machining area is positioned, parameters of water jet assisted laser and electrochemical machining are set, so that during laser machining, water jet cools the machining area and removes slag, and an electrolyte does not affect a non-machining area; meanwhile, water jet assisted laser and electrochemistry are started to machine the nickel-based superalloy, and the machining state is monitored in real time; and after composite machining is completed, the nickel-based high-temperature alloy is cooled. By accurately setting laser, water jet and electrochemical machining parameters, the efficient synergistic effect of the laser, water jet and electrochemical machining parameters in a machining area is ensured, the machining precision and the surface quality are effectively improved, the defects of heat affected zones, microcracks, recast layers and the like are remarkably reduced, and the machining quality is improved. And meanwhile, corrosion to a non-machining area is reduced through the mode of spraying the electrolyte in a pulse mode.

The invention relates to a stirring friction extrusion solid phase additive deposition layer edge precision control device and method, and belongs to the technical field of additive manufacturing, the stirring friction extrusion solid phase additive deposition layer edge precision control device comprises a hollow stirring head, the hollow stirring head can rotate, and a through hole is formed in the central axis of the hollow stirring head and used for filling raw materials; the periphery of the hollow stirring head is sleeved with four split type sleeves, and the four split type sleeves can independently move up and down respectively. According to the method, side wall forming of the additive layer is limited, generation of burrs, the arc-shaped side wall and semi-cylindrical materials at the two ends of the additive layer is restrained, and therefore the follow-up cutting amount is reduced, and near-net forming of components is achieved; by limiting the plasticized material to flow to the periphery, the additive layers at the center and the edge are more compact, and the mechanical properties of the whole additive layers and the side wall part are improved; and multi-layer material adding in the vertical plane and multi-channel material adding in the horizontal plane can be achieved, accurate forming of the side wall can be achieved under the condition that the device is not replaced, and the flexibility of the device is improved.

The invention relates to the field of medical equipment, and discloses an intracavity radiofrequency ablation system. The system includes a radio frequency generator, a catheter with a heating element, a pressure sensor, and a temperature sensor, a processor, and a display. By monitoring the temperature and the pressure in real time and dynamically adjusting the radio frequency energy output power, the safety and the accuracy of the treatment process are ensured. The system can automatically adjust treatment parameters according to the real-time contraction condition of the cavity tissue, prevent overheating, reduce damage to normal tissue, provide visual tissue contraction feedback and improve the treatment effect.

The invention relates to the technical field of coatings, and discloses a modified hexagonal boron nitride and organic silicon double-component doped high-flame-retardant epoxy resin powder coating as well as a preparation method and application thereof. Comprising the following raw materials in parts by weight: 25-50 parts of modified hexagonal boron nitride, 90-110 parts of organic silicon resin, 120-150 parts of epoxy resin, 5-8 parts of dicyandiamide, 100-120 parts of silica powder, 8-12 parts of other auxiliaries and 80-100 parts of filler. The flame-retardant epoxy resin powder coating is prepared by uniformly mixing the components, melting, extruding a sheet material, grinding and sieving. The flame-retardant and fireproof performance of the epoxy resin powder coating is greatly improved in a modified hexagonal boron nitride and organic silicon double-component doping mode.

The utility model discloses a multi-stage split energy-saving combustion device for liquid fuel, the energy-saving combustion device is composed of a combustion cylinder, an ion combustion body and a combustion body installation box in sequence from top to bottom, the upper end of the ion combustion body is fixedly connected with the combustion cylinder, the lower end of the ion combustion body is provided with an impeller air inlet channel, and the combustion cylinder is fixedly connected with the combustion body installation box. The impeller air inlet channel is located in the combustion body installation box, the combustion body installation box is of a hollow cavity structure, and a fan air inlet and an oil inlet hole are formed in the side face of the combustion body installation box. Compared with the prior art, the atomization combustion mode of an original electronic injection fuel stove is changed essentially, atomization of a high-pressure atomization nozzle is not needed, high-temperature vaporization combustion of liquid fuel is achieved in the first-stage combustion cavity, stable combustion and sufficient vaporization are achieved in the second-stage combustion cavity, and sufficient combustion and heating are achieved in the third-stage combustion cavity. The energy consumption is lower, the heat utilization rate is nearly doubled, the safety is higher, the independence is good, and the applicability is wide.

The invention relates to the technical field of lithium battery cell disassembly and recovery, in particular to a lithium battery cell disassembly and recovery device. Comprising a bottom plate, a transparent shell is arranged at the top of the bottom plate, a baffle is arranged on the transparent shell in a sliding mode, and a feeding mechanism is arranged on the bottom plate and used for feeding waste lithium batteries into the transparent shell. The transparent shell is filled with nitrogen through the gas transmission mechanism, then the waste lithium battery is fed into the transparent shell through the feeding mechanism, the waste lithium battery can be automatically disassembled through cooperation of the clamping type conveyor, the ceramic saw blade, the push block, the detection mechanism and the absorption mechanism, electrolyte is automatically collected, time and labor are saved, and the working efficiency is improved. The method is simple in process and high in efficiency, electrolyte in the waste lithium battery can be prevented from volatilizing and combusting by disassembling the waste lithium battery in the nitrogen environment, the safety of the disassembling process is improved, and meanwhile, chemical reaction can be inhibited and generation of harmful gas can be reduced by utilizing the inert characteristic of nitrogen.

The invention discloses a power management circuit based on programmable output reference voltage and a control method thereof. The circuit comprises a first power supply voltage input end (VCC) used for inputting a power supply; the NMOS tube (Q1) is used for controlling the output voltage (VOUT) according to the change of the reference voltage input end (INREF); the current-limiting resistor (R1) is connected in series with the source electrode of the NMOS tube (Q1) and is used for detecting output current; the base electrode of the triode (Q2) is connected to one end of the current-limiting resistor (R1), and when it is detected that the current exceeds a preset value, the triode (Q2) is conducted to reduce the reference voltage; the optical coupler (U1) is connected with an external control unit, the external control unit generates an over-current alarm signal by detecting the voltage on the current-limiting resistor, and the output of the power supply is turned off by controlling the reference voltage input end (INREF) to 0V, so that the circuit is protected.

The utility model provides a wheel speed sensor signal analysis circuit, which is used for enabling the circuit to be compatible with a standard current type wheel speed sensor and an AK protocol current type wheel speed sensor at the same time, and comprises an overcurrent protection module, a current sampling resistor and a wheel speed signal output module, the overcurrent protection module is used for closing the connection with the wheel speed signal output module when the signal of the wheel speed sensor is short-circuited; the wheel speed signal output module is used for outputting a level signal corresponding to a wheel speed sensor signal; the overcurrent protection module is connected with one end of the current sampling resistor; one end of the current sampling resistor is connected with the wheel speed signal output module; the other end of the current sampling resistor is grounded.

The invention relates to an anti-yellowing automobile composite film and a preparation method thereof, and belongs to the technical field of high polymer materials. The yellow-resistant automobile composite film is prepared from the following components in parts by weight: 60 to 70 parts of PVC (Polyvinyl Chloride) master batch, 10 to 20 parts of TPU (Thermoplastic Polyurethane) master batch, 1 to 2 parts of plasticizer, 0.5 to 0.8 part of flatting agent, 0.1 to 2 parts of yellowing-resistant modifier and 0.1 to 2 parts of modified flame retardant, sym-triazine cyanuric chloride and a benzotriazole intermediate in the anti-yellowing modifier absorb ultraviolet rays and reduce yellowing of the ultraviolet rays on the composite material, and maleimide groups, maleic anhydride and isocyanurate rings for increasing the crosslinking density cooperate with one another, so that the heat resistance of the material is improved, and the yellowing is reduced; phosphorus and nitrogen main chains of phosphonitrilic chloride trimer in the modified flame retardant have a conjugation effect, so that a protective film is formed, oxygen is isolated, and the phosphonitrilic chloride trimer and nitrogen are synergistically flame-retardant; the anti-yellowing automobile composite film prepared by the invention not only has excellent ultraviolet absorption performance, heat resistance and anti-yellowing effects, but also has a good flame retardant effect.

The invention belongs to the technical field of semiconductor function testing devices, and discloses a semiconductor function testing device based on mechatronics, which comprises a box body, two box doors hinged to one side of the box body, a controller arranged on one side of the upper box door, an observation window arranged below the controller, and a fixed block fixedly connected in the box body. A partition plate is fixedly connected to the top of the fixing block, a high-temperature cavity is formed in one side of the partition plate, a low-temperature cavity is formed in the other side of the partition plate, and a heating block is fixedly installed on the inner wall of the top of the high-temperature cavity. The two semiconductors are placed in the box body to be tested respectively, and the two semiconductors can be converted after being subjected to high-temperature and low-temperature testing, so that the two semiconductors do not need to be taken out independently, the high-temperature and low-temperature testing can be completed, and the semiconductors are kept dry; and water vapor in high-temperature air is prevented from being quickly condensed into water mist to be adhered to a semiconductor, so that the test effect is not influenced.

The invention provides an endoscope. The endoscope comprises a head end part, and the head end part comprises a head end seat shell, a forceps lifting device and an insulating cover. The head end seat shell is provided with an extending window and a cleaning window, and the extending window and the cleaning window are communicated to form a containing cavity; at least one part of the forceps lifting device is arranged in the accommodating cavity and is used for adjusting the extending direction of the medical instrument from the extending window; the insulating cover is detachably connected to the headstock housing to cover the cleaning window. When the endoscope provided by the invention is used, even if a medical instrument lapped on the forceps lifting device is high-frequency electric equipment, the insulating cover is arranged to seal the cleaning window, so that a patient is prevented from being burnt through the cleaning window after the forceps lifting device is conducted by high-frequency electricity. And after the endoscope is used, the insulating cover can be detached from the head end seat shell, so that the forceps lifting device can be cleaned through the cleaning window, namely, the cleaning difficulty and efficiency of the endoscope are not influenced by the arrangement of the insulating cover.

The invention relates to an antistatic functional plastic and a preparation method thereof, and belongs to the technical field of high polymer materials. The plastic with the antistatic function comprises the following components in parts by weight: 80-100 parts of polystyrene resin, 10-20 parts of glass fibers, 1-5 parts of an antioxidant, 2-8 parts of a light stabilizer, 5-10 parts of a modified antistatic agent and 0.3-0.6 part of a modified flame retardant, anhydride groups in the modified antistatic agent are dehydrated at a high temperature to form a conductive layer, static accumulation is effectively reduced, the anhydride groups and quaternary ammonium salt have a synergistic effect on static elimination characteristics and strong adsorption capacity, and meanwhile, the combustion speed is remarkably slowed down through heat absorption and catalysis of maleic anhydride; in the modified flame retardant, an alpha-amino alkyl phosphonate compound is decomposed to generate phosphorus-containing free radicals, a combustion chain is interrupted, nitrogen is released to inhibit combustion, the alpha-amino alkyl phosphonate compound and DOPO cooperate for flame retardance, the flame retardant efficiency is improved, and the prepared antistatic functional plastic has a good antistatic function and also has excellent flame retardant and tensile properties.

The invention discloses a flame retardant with a double-layer microcapsule structure, a flame-retardant polyurethane material as well as a preparation method and application of the flame-retardant polyurethane material, and belongs to the technical field of flame retardants. The material is a multifunctional flame retardant with a double-layer core-shell structure, a shell layer is calixarene boric acid resin, a middle shell layer is melamine phthalic anhydride resin, and a core layer is hydroxyapatite modified aluminum hypophosphite. Due to the high cross-linking degree between polymers, the flame retardance of polyurethane is improved, meanwhile, the mechanical property of the polyurethane is improved, and the flame retardance and seawater corrosion resistance of the material are synergistically enhanced through hydroxyapatite dispersed in the core layer. The double-shell layer has excellent hydrophobicity, prevents internal aluminum hypophosphite from being affected with damp and has anti-fouling and self-cleaning effects, and the prepared flame-retardant polyurethane composite material has excellent tensile and flexible characteristics due to a double network of hydrogen bonds and covalent bonds.

The invention relates to a perfluoro wide-temperature electrolyte for a lithium battery and application thereof, the wide-temperature electrolyte comprises a lithium salt, an additive and a plurality of perfluoro mixed solvents, the electrolyte capable of stably working in a wide temperature range (-80-80 DEG C) is successfully constructed, and the excellent electrochemical performance of the lithium battery at the wide temperature is realized. The electrolyte additive disclosed by the invention mainly comprises one or more of hexafluoroisopropoxy cyclotriphosphazene, 3-(2, 2, 2-trifluoroethoxy) propionitrile, 3-(2, 2, 2-trifluoroethoxy) butyronitrile, 3, 4-fluoroethylene sulfate and 4-trifluoromethyl-ethylene sulfate, and the fluorine-containing additive is good in flame retardant effect, moderate in viscosity, good in system compatibility, good in corrosion resistance and good in corrosion resistance. And a protective film can be formed on the surface of the positive electrode of the lithium battery, so that the high-pressure and high-temperature cycle performance of the battery is improved, the electrochemical performance of the battery is not influenced at all, the self-extinguishing time of the electrolyte is obviously shortened, the flame retardant property and the conductivity are excellent, the overcharge resistance of the lithium ion battery is also obviously improved, and the safety performance of the battery is improved.

The invention relates to a halogen-free flame-retardant TPU composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The halogen-free flame-retardant TPU composite material is prepared from the following components in parts by weight: 3 to 10 parts of a modified flame retardant, 2 to 10 parts of phenoxy cyclophosphazene, 80 to 100 parts of TPU particles, 90 parts of N, N-dimethylformamide, 0.8 to 1.2 parts of an ultraviolet light absorber and 2.5 to 3.5 parts of a lubricating agent, in the modified flame retardant, ammonium polyphosphate is heated into polyphosphoric acid, heat insulation and flame retardance are achieved, the comprehensive performance of the material is improved, and a quaternized structure and a carbamate bond synergistically enhance the flame retardance and heat resistance of the material; in the ultraviolet light absorber, cyanuric chloride and benzotriazole intermediates absorb ultraviolet rays, so that the damage of the ultraviolet rays to the material is reduced, and the ageing resistance and the toughness are enhanced; the halogen-free flame-retardant TPU composite material prepared by the invention not only has good flame-retardant and heat-resistant effects, but also has excellent ultraviolet resistance.

The large valve casting casting device comprises a workbench, a working plate is arranged above the workbench, and the two sides of the top end of the working plate are each provided with a pair of sliding bases. In the prior art, when molten metal in a casting furnace is poured into a pouring opening of a mold, distance control and rotation of a furnace body need to be considered, and once the control of the factors is not accurate, the molten metal in the casting furnace is prone to being sprayed out of the furnace body and the pouring opening of the mold; and on one hand, the valve casting efficiency of the device is reduced, and on the other hand, the problem that workers are scalded easily due to splashing of scattered molten metal is solved. The device has the advantages that the possibility that molten metal in the furnace body is sprayed out of the guide funnel is reduced, it is ensured that more molten metal flows into the guide funnel, the casting efficiency of the device is guaranteed, and meanwhile the safety of using the device by workers can be improved.

The invention belongs to the technical field of insulating flame-retardant adhesive tapes, and particularly relates to an insulating flame-retardant adhesive tape and a preparation method thereof. According to the invention, phytic acid reacts with 3-amino-5-methylpyrazole, triaminopyrimidine and polyether amine-2000 to prepare a flame-retardant auxiliary agent, and the flame-retardant auxiliary agent is compounded with magnesium hydroxide, zinc borate and melamine to prepare a modified flame retardant which can generate an expansive carbon layer during combustion to block heat and isolate oxygen so as to achieve a flame-retardant effect; an aluminum oxide layer generated on the artificial diamond micro-powder is used as an insulating heat-conducting aid, so that the insulativity, wear resistance and corrosion resistance of the insulating flame-retardant adhesive tape are improved, the adhesive tape can be assisted in uniform heat conduction, and combustion caused by over-high local temperature is prevented; epoxy resin is used for wrapping the uniformly dispersed insulating heat-conducting auxiliary agent, and anisyl and boron nitride ceramic powder are cured to prepare an insulating material, so that the dielectric breakdown performance of the adhesive tape is enhanced. The insulating flame-retardant adhesive tape prepared by the invention is excellent in insulativity and flame retardance and free of halogen flame retardants, and the production process is environment-friendly.

According to the B1-level flame-retardant cable provided by the utility model, a combined structure of the low-smoke halogen-free flame-retardant layer, the inner flame-retardant layer and the outer flame-retardant layer is introduced, so that the cable is excellent in performance under a fire hazard condition, the cable core is effectively prevented from being burnt, and basic functions of an electrical system can be kept in a certain time when the fire hazard occurs in time; and adverse effects of fire on equipment and lines are reduced. Meanwhile, the shielding layer arranged on the cable prevents signals in the cable from external electromagnetic interference, electromagnetic radiation of the cable to the external environment is reduced, the water-blocking layer effectively improves the water-blocking performance of the cable, the wear-resistant outer sheath ensures the compactness of the structure in the outer sheath, the wear-resistant outer sheath is more wear-resistant, and the service life of the wear-resistant outer sheath is prolonged. The cable cannot be easily damaged during use, and the service life of the cable is ensured. Therefore, the B1-level flame-retardant cable has good flame-retardant performance and excellent performance, and is excellent in performance in a complex environment, and a reliable solution is provided for the stability and reliability of an electric power system.

The present invention relates to a device and method for controlling the edge precision of a stir friction extrusion solid-phase additive deposition layer, which belongs to the field of additive manufacturing technology, and includes a hollow stirring head, which can rotate, and a through hole is arranged at the central axis thereof for filling raw materials; four split sleeves are sleeved around the hollow stirring head, and the four split sleeves can move up and down independently. The present invention restricts the side wall forming of the additive layer, suppresses the generation of flash, arc-shaped side walls and semi-cylindrical materials at both ends of the additive layer, thereby reducing the subsequent cutting amount and achieving near-net forming of the component; by restricting the flow of plasticized material to the surroundings, the additive layer at the center and the edge is made denser, and the mechanical properties of the additive layer as a whole and the side wall are improved; it can realize multi-layer additives in the vertical plane and multi-pass additives in the horizontal plane, and can also realize precise forming of the side wall without changing the device, thereby improving the flexibility of the device.

The invention relates to the field of constant-temperature and constant-humidity control cabinets, in particular to a constant-temperature and constant-humidity control cabinet which comprises a control cabinet body, a fixing frame is fixedly connected to the front face of the control cabinet body, mounting plates are slidably connected to the two sides of the interior of the control cabinet body, each mounting plate is of a U-shaped structure, and sealing plates are fixedly connected to the front faces of the mounting plates. Sealing strips are connected to the peripheries of the sealing plates, a plurality of containing mechanisms are jointly connected between the sealing plates and the corresponding mounting plates, and handles are fixedly connected to the middles of the front faces of the sealing plates. According to the invention, the two drawable mounting plates are arranged in the control cabinet body, and the mounting plates are internally provided with a plurality of placement mechanisms for storing articles, so that when a worker takes the articles, the mounting plates can be drawn out of the control cabinet body, and at the moment, the mounting plates can seal the opening of the control cabinet body, so that in the process of taking the articles, the articles can be conveniently placed in the control cabinet body. And the control cabinet body is still in a closed state, so that the temperature and humidity variation amplitude in the control cabinet body can be reduced.

The utility model relates to the technical field of stove equipment, in particular to a novel dining table heating stove. The dining table plate is fixed at the top of the furnace body, the base is fixed at the bottom of the furnace body, furnace openings are formed in two sides and one end of the furnace body, a door frame is fixed on one side of each furnace opening, a furnace door is rotatably connected with one side of each door frame, and an elastic metal chuck is fixed on one side, close to each door frame, of each furnace door. Through the structural design of the auxiliary mechanism, the device can conveniently open the furnace door by stepping on the foot rest lever, so that a user can add fuel into the furnace body when the surface temperature of the furnace door is high, the furnace door is prevented from being directly and manually opened, the hand is prevented from being scalded, the safety of the device is improved, and the use is convenient. And through the structural design of the furnace door and the glass, the device efficiently exchanges heat with air in a room through heat radiation of the glass, the heat transfer efficiency is improved, and the heating effect in winter is good.

The invention relates to the technical field of metal casting, and discloses casting equipment for a GIS conductor and a casting method.The casting equipment for the GIS conductor comprises a mounting frame, a casting motor arranged at the bottom of the mounting frame, a protective cover arranged at the top of the mounting frame, an upper mold arranged in the middle of the mounting frame and a lower mold arranged at the bottom of the upper mold; the injection port is formed in the top of the upper die, the rotating rod is arranged at the bottom of the lower die, the baffle is arranged on one side of the top of the protective cover, and the rotating disc is arranged at the bottom of the rotating rod; the liquid pouring part comprises a driving assembly arranged at the bottom of the baffle. And through automatic pouring of the molten metal, the time and cost of manual operation can be greatly reduced, and therefore the efficiency of the whole production process is improved. And the product quality is guaranteed, it is guaranteed that molten metal is accurately poured into the needed position, and the product quality problem caused by human factors is avoided.

The invention discloses a multi-scale hybrid particle reinforced aluminum-based composite material, which is prepared from the following raw material powder in percentage by mass: 70 to 98.5 percent of AlSi10Mg atomized powder, 0.5 to 20 percent of micron-sized Al2O3 powder, 0.5 to 20 percent of nano-sized Al2O3 powder and 0.5 to 20 percent of submicron-sized SiC powder, and the sum of the mass percent of the components is 100 percent. The material is an aluminum-based composite material with high strength, high toughness and high hardness. The invention further provides an SLM preparation method of the multi-scale hybrid particle reinforced aluminum-based composite material, through particle content optimization, powder preparation process innovation and SLM process parameter optimization, the high-strength, high-toughness and high-hardness aluminum-based composite material is obtained, and additive manufacturing of the aluminum-based composite material is achieved.

The invention provides a micro-pressure air fryer which comprises a sealed cooking cavity and a hot air assembly, the hot air assembly comprises a heating piece and a hot air fan, the hot air assembly conveys hot air into the cooking cavity to cook food, the cooking cavity is provided with a steam exhaust channel, steam generated in the cooking cavity is exhausted through the steam exhaust channel, and the volume of the cooking cavity is 3-10 L. The relation between the sectional area S of the steam exhaust channel and the power density phi of the air fryer meets S = K * phi, the value of K is 0.03-1 mm < 2 > / (W / L) so that the working pressure intensity of the cooking cavity can be maintained at 80-960 pa, and the power density is the ratio of the power of the heating piece to the volume of the cooking cavity. According to the air fryer, the influence of the volume of the cooking cavity, the heating power and the sectional area of the steam exhaust channel on the working pressure of the cooking cavity is fully considered, so that the working pressure of the air fryer designed according to the application tends to be consistent, and a user can adopt the same cooking process when cooking the same food material by using different types of air fryers; different types of air fryers have good cooking consistency.

The invention relates to the technical field of cables, in particular to a 220kV crosslinked polyethylene ultrahigh-voltage cable and a preparation method thereof. The 220kV crosslinked polyethylene ultrahigh-voltage cable comprises a conductor, an inner semi-conductive shielding layer, a modified crosslinked polyethylene insulating layer, an outer semi-conductive shielding layer, a fireproof enhancement layer and a sheath, a crosslinked polyethylene insulating layer in a traditional 220kV crosslinked polyethylene ultrahigh-voltage cable is modified, and a fireproof reinforcing layer is introduced on the basis of the traditional 220kV crosslinked polyethylene ultrahigh-voltage cable; in the aspect of mechanical performance, the strength, the flexibility and the wear resistance are improved, frequent actions and complex environments of fire-fighting robots and movable fire-fighting equipment are adapted, in the aspect of heat stability, the heat resistance is enhanced, and normal work of emergency rescue equipment at high temperature is guaranteed; the sintered material forms a heat insulation barrier in a fire disaster to protect the emergency rescue lighting and communication equipment cable from being damaged by high temperature, and the flame retardant inhibits flame spreading and combustion to prevent the fire disaster from expanding through the cable.

The invention discloses a multi-range capacitor capacitance value measuring circuit and method based on constant current state charging and discharging, and relates to the technical field of capacitor testing. The circuit comprises a power supply module, the output end of which is electrically connected with one end of a capacitor to be tested; the input end of the resistance shunting module is electrically connected with the other end of the capacitor to be measured; the input end of the integration module is electrically connected with the output end of the resistance shunting module; the input end of the sampling module is electrically connected with the output end of the integration module; the control module is electrically connected with the power supply module, the resistance shunting module, the integration module and the sampling module; and the first input end of the adjustable window threshold comparison module is electrically connected with the output end of the integration module, and the second input end of the adjustable window threshold comparison module is electrically connected with the control module. According to the circuit provided by the embodiment of the invention, multi-range capacitance value testing can be realized.

The present application discloses a hot press forming device for bolt processing, which relates to the field of metal forging technology. The device comprises a processing table, an inner cavity of the processing table is provided with a forming assembly, a hydraulic cylinder is fixedly installed on the top bottom wall of the processing table, and a second piston rod is slidably connected to the inner cavity of the hydraulic cylinder. The present invention can produce bolts of different lengths according to demand through the forming assembly, and the workpiece can be ejected by a demoulding mechanism with flexible force after hot forging, so as to prevent the demoulding mechanism with too strong rigidity from ejecting or manually pulling out and damaging the workpiece or the mold. Water can be automatically sprayed for cooling during demoulding, which is also helpful for demoulding, improving production efficiency and preventing workers from being scalded when taking out the workpiece. The positioning assembly can detect whether the pressing mold has position deviation, and when the pressing mold has position deviation, an alarm can be issued in time to remind the workers to perform maintenance. The device can also detect whether the pressing mold is tilted, so as to ensure uniform force during hot pressing and avoid mass production of unqualified bolts.

The invention provides a carbon nano tube film flexible electric heating composite fabric and a preparation method, and solves the technical problems that the existing heating fabric cannot be folded for multiple times, is poor in comfort and cannot be cut, the carbon nano tube film flexible electric heating composite fabric comprises an antibacterial layer, a waterproof layer, a heating layer and a substrate layer, the waterproof layer comprises an upper waterproof layer and a lower waterproof layer, the device is characterized in that an upper waterproof layer and an antibacterial layer are sequentially arranged at the upper end of the heating layer, a lower waterproof layer and a substrate layer are sequentially arranged at the lower end of the heating layer, and the heating layer comprises a heating element and a flexible electrode; the heating element is a carbon nanotube film made of multi-walled carbon nanotubes with two closed ends and placed in the same direction, the conductivity of the heating element in the longitudinal direction is larger than that in the transverse direction, and the surface of the carbon nanotube film is electrically connected with the flexible electrode in a longitude and latitude crossing mode. The method can be widely applied to the technical field of cloth preparation.

The utility model provides a turnover grill which comprises a mounting mechanism, the mounting mechanism comprises a first frame, a carbon box is placed in the first frame, supporting legs are arranged at the bottom end of the first frame, a barbecue fixing mechanism is arranged on the first frame, and a turnover mechanism is arranged between the barbecue fixing mechanism and the first frame. The turnover mechanism comprises a power rod, the power rod is rotationally connected with a first supporting rod, the first supporting rod is fixedly installed on the first frame, the power rod is fixedly connected with a first connecting rod, and the other end of the first connecting rod is rotationally connected with the barbecue fixing mechanism. The other end of the barbecue fixing mechanism is rotationally provided with a second connecting rod, the other end of the second connecting rod is rotationally connected with a second supporting rod, and the second supporting rod is fixedly installed on the first frame, so that the grill does not need to be manually turned over, scalding is avoided, meanwhile, the working efficiency is greatly improved, and the interestingness of barbecue is improved.