16results about How to "Eliminate danger" patented technology

The invention relates to a tethered airship self-destruction control method which specifically comprises an airborne control core and a self-destruction standby system so as to ensure that a self-destruction task can be effectively executed under different fault conditions. The airborne control core judges whether the airship exceeds a safety range or not through the GPS module, or receives a remote self-destruction instruction through the wireless communication module to trigger a self-destruction program. The self-destruction process comprises the steps that the valve push rod driving circuit rapidly deflates, the electric heating wire driving circuit burns through the ball body, the lithium battery burning explosion trigger circuit triggers battery burning explosion, and thorough damage is ensured. If the main system fails, the standby control module supplies power through a standby battery, takes over a self-destruction task, keeps communication with the ground, and triggers the parachute to release by utilizing a time delay mechanism or an air pressure sensor when the height sensor fails, so that the landing safety is guaranteed. And the main control program performs byte-by-byte deletion through a bootloader program in a self-destruction process, so that data leakage is prevented.

The invention discloses a simulation test method for improving the combustion performance of a cable. A simulation test environment capable of accurately simulating the combustion process of the cable in a fire disaster is constructed by using fire dynamics software FDS; the method comprises the following steps: constructing Fortran compilation and automatically constructing a make environment; creating a combustion chamber three-dimensional model in the FDS according to the standard, and simulating the combustion test environment of the cable; fuel is directly defined as a mixture of propane and air in a simulation test environment so as to simulate a real combustion source; performing grid division on the three-dimensional model of the combustion chamber; in the modeling of the cable system, the geometric layout of the cable is input in detail, and the cable is decomposed into corresponding components according to the layered structure of the cable; arranging a virtual thermocouple and a smoke concentration sensor in the three-dimensional model of the combustion chamber; through simulation operation, a temperature curve and a flue gas concentration change process captured by the thermocouple and the flue gas concentration sensor are recorded in real time. The method can help to improve the design level of the cable.

The utility model relates to the technical field of automobile oxygen sensors, in particular to a stably-installed automobile oxygen sensor which comprises an automobile oxygen sensor and a wire, the rear end of the automobile oxygen sensor is electrically connected with the front face of the wire, the rear of the wire is electrically connected with a connector, and the outer wall of the connector is connected with a fixing structure. Bent plates are fixedly connected to the left side and the right side of the rear end face of the automobile oxygen sensor respectively, a second bent rod is held by one hand in a supporting structure, a straight cylinder is held by the other hand in the supporting structure, the straight cylinder rotates through the right bent plate, the rotating straight cylinder drives the first bent rod to move backwards, the moving first bent plate drives a circular ring to move backwards, and therefore the automobile oxygen sensor is formed. Meanwhile, the second bent rod connected to the left side of the circular ring can move backwards on the inner wall of the left bent plate, the circular ring can support the wire, direct bending of the joint of the wire and the automobile oxygen sensor is avoided, the danger of the automobile oxygen sensor is eliminated, and the service life of the automobile oxygen sensor is guaranteed.

This invention relates to a pharmaceutical supply unit and a substrate processing system thereunder, as well as a pharmaceutical supply method. It discloses a technique for ensuring the reliability and stability of the process by sensing and removing impurities generated during a chemical reaction when a pharmaceutical solution is supplied through the pharmaceutical supply unit.

The utility model relates to an anti-seismic structure, belongs to the technical field of high-rise building anti-seismic, and particularly relates to a high-rise building anti-seismic structure which comprises a bottom plate and an anti-seismic assembly, and notches are formed in the periphery of the inner side of the bottom plate. When the support is vibrated, the vertical plates can transmit vibration force to the supports and the supporting rods, when the supports are stressed to deform towards the inner side, the straight plates and the protective jackets form supports to support the supports, the supports can be prevented from deforming towards the inner side, meanwhile, the protective jackets and the straight plates are supported by the vertical rods, and the support effect is good. An original anti-seismic structure composed of the multiple supporting rods and the support is reinforced, the anti-seismic performance of the anti-seismic structure of the high-rise building is improved, and the danger of the anti-seismic structure of the high-rise building is eliminated; the problems that an existing shock insulation pad and an existing damping rod are prone to deformation, the anti-seismic performance of an anti-seismic structure of a high-rise building is reduced, and the danger of the anti-seismic structure of the high-rise building is increased are solved.

The application belongs to the technical field of medical intermediates, and relates to a production method of a clotrimazole intermediate (2-chlorophenyl)diphenylmethanol. In the method, 2-methyltetrahydrofuran or cyclopentyl methyl ether is used as a reaction solvent, an ethyl o-chlorobenzoate solution is added dropwise into a phenyl magnesium bromide solution with a concentration of 2.5-3.5 M under the conditions of 60-80 DEG C and inert atmosphere, the reaction is continuously carried out after the dropwise addition is completed, a water solution of a quenching agent is added after the reaction to quench, then, liquid separation is carried out, and the organic phase after the liquid separation is concentrated to obtain a crude product; the crude product is refined by using a reaction solvent and petroleum ether, and (2-chlorophenyl)diphenylmethanol is obtained. The production method can efficiently and stably produce high-quality (2-chlorophenyl)diphenylmethanol, reduces production cost and safety hazards, and can be used for large-scale industrial production.

The invention discloses an overhanging type scaffold support with the height capable of being finely adjusted, which comprises a vertical supporting angle steel, a horizontal supporting angle steel and a horizontal supporting angle steel, the transverse supporting angle steel is horizontally arranged at the upper end of the vertical supporting angle steel; one end of the inclined supporting angle steel is arranged at the lower end of the vertical supporting angle steel, and the other end of the inclined supporting angle steel obliquely extends upwards and is fixed to the transverse supporting angle steel; the pair of adjusting mechanisms is arranged at the upper end and the lower end of the vertical supporting angle steel and used for controlling the transverse supporting angle steel and the inclined supporting angle steel to vertically slide. By arranging the transverse supporting angle steel and the inclined supporting angle steel which are adjustable in height position, position adjustment of the whole overhanging type scaffold support is achieved, small differences between two end points on the same scaffold and between scaffold supports on the same layer are eliminated, the overall stability and safety of scaffold engineering are guaranteed, and the construction efficiency is improved. Meanwhile, height adjustment is achieved through a simple adjusting method, the height difference is eliminated, and the possible danger of the scaffold is eliminated.

The utility model discloses a special tool for drilling a hoop. The special tool comprises a base, a stop block, a positioning pin and an upper cover, a rectangular assembly groove used for installation of the check block is formed in the center of the upper end face of the base, and inserting grooves used for fixing the upper cover are symmetrically formed in the two sides of the rectangular assembly groove. When the clamp part is assembled, the fixing hole in the clamp part is aligned with the limiting pin hole in the side wall of the special-shaped boss of the check block, the positioning pin is inserted into the limiting pin hole, at the moment, the face-shaped part of the clamp part is attached to the special-shaped boss and is matched with the positioning pin to achieve alignment of the clamp part, and then the upper cover is buckled on the base. The clamp part is further pressed and locked through the upper cover, and then drilling operation of the clamp part is conducted in cooperation with drilling equipment.

The invention discloses a connection structure and method of a prefabricated cylinder and a pile foundation, comprising two pile foundations arranged opposite to each other, wherein the top of the pile foundation is connected to the prefabricated cylinder, and the prefabricated cylinders at the tops of the two pile foundations are connected by a cast-in-place tie beam; a groove is arranged on the top of the pile foundation, a tenon is arranged on the bottom of the prefabricated cylinder, the tenon is embedded in the groove, a first steel corrugated pipe is arranged on the side of the groove, a second steel corrugated pipe is sleeved on the outer side of the bottom of the tenon, and a grouting casting part is arranged between the first steel corrugated pipe and the second steel corrugated pipe.

The invention relates to the field of corrugated board detection, in particular to a corrugated board compressive strength testing device which comprises a testing host, the testing host comprises a pressing testing rod, and the testing host further comprises a material conveying device located on the testing host; the material conveying device comprises a clamping seat, a clamping plate is arranged on the clamping seat, and a pressing plate assembly is further arranged on the clamping seat; the material conveying device further comprises a driving mechanism and a pre-pressing mechanism. The material conveying device comprises a discharging station, a pre-pressing station and a testing station. When the clamping base is located at the discharging station, the driving mechanism drives the clamping plate to be opened. When the clamping seat is located at the pre-pressing station, the driving mechanism drives the clamping plate to clamp the corrugated board, and the pre-pressing mechanism drives the pressing plate assembly to downwards press the clamped corrugated board; when the clamping base is located at the testing station, the driving mechanism drives the clamping plate to be opened, and the testing rod is pressed downwards to abut against the pressing plate assembly so as to test the corrugated board. According to the invention, the pre-pressure is applied to the corrugated board before testing to replace the clamping force of a clamping plate, so that the measurement error caused by the clamping force is eliminated.

The invention relates to the technical field of chain wheel conveyors and discloses an anti-disengaging type chain wheel synchronous conveyor which comprises side plates arranged symmetrically, conveying rollers are rotatably connected between the side plates at equal intervals, chain wheel bodies are fixedly connected to the two ends of each conveying roller, and chain bodies are arranged between the chain wheel bodies on the same side in a sleeving mode. Power switches are arranged on the sides, away from the conveying rollers, of the side plates, the chain body can be effectively prevented from falling off from the chain wheel body by keeping the tensioning force of the chain in time, so that the continuity and stability of power transmission are guaranteed, sudden shutdown of conveying equipment due to falling off of the chain body is avoided, and the reliability and stability of the whole production line are improved; the chain body loosening prevention device is simple in structure and convenient for workers to timely find and process the problem of loosening of the chain body, avoids larger faults and higher maintenance cost caused by problem accumulation, and meanwhile, reduces the downtime caused by the problem of the chain body, and improves the utilization rate and production efficiency of conveying equipment.

This invention discloses an oil-free floor spring, i.e., a floor spring that operates without machine oil, relating to the field of floor spring technology. It includes a mounting box and a panel, the panel being fixedly mounted on the mounting box. A mounting base is fixedly mounted inside the mounting box, and a shaft cover plate is fixedly mounted on the mounting base. This invention achieves the effect of adjusting the extension and retraction speed of the telescopic cylinder by controlling airflow, thus avoiding the use of machine oil as the control medium. This solves the problems of existing floor springs, which, due to their annular oil circuit and use hydraulic oil as the control medium, may leak oil and lose performance after long-term use due to aging of seals or mechanical wear. This can cause the door to close too quickly due to uncontrolled movement, potentially injuring people. Furthermore, because the interior is filled with machine oil, there is a possibility of explosion, oil spraying, and combustion in the event of a fire, posing a danger to human life. Additionally, in extreme low-temperature environments, the viscosity of the oil may change, leading to excessively slow or stopped closing speeds.

The utility model relates to the technical field of chemical reagent production, in particular to a centrifugal device which comprises a box body, a driving motor, a rotating shaft, a fixing frame, a rotating plate, a plurality of installation bodies, a plurality of frosted plates, a plurality of electric telescopic rods, a control assembly, a top cover assembly and an auxiliary assembly. A frosted plate moves rightwards in a second round hole until the frosted plate abuts against a test tube, a top cover assembly is used for sealing a box body, then a driving motor is started, a rotating shaft is rotated under the cooperation of an auxiliary assembly so as to drive a mounting body above a rotating plate to conduct centrifugation, a control assembly is convenient for workers to control, and the test tube is clamped in this way, so that the test tube is clamped more conveniently. The condition that the test tube falls off during centrifugation is avoided, and the danger in the centrifugation process is eliminated.

The utility model discloses an aluminum alloy door and window installation device which comprises a door and window, an external expansion clamping mechanism, a lifting mechanism and a position replacement mechanism, the external expansion clamping mechanism comprises a supporting frame, an external supporting rod, a clamping block, a first spring and a second spring, and the lifting mechanism comprises a support, a lifting table and a lifting air cylinder. The position changing mechanism comprises a two-way motor, a lead screw, a connecting rod and a connecting sleeve, under the mutual cooperation of the mechanisms, the device can replace manual work to clamp the installed aluminum alloy door and window, the danger brought to workers when the aluminum alloy door and window are installed on a high floor is relieved, and the working efficiency is improved. And the aluminum alloy door and window with the large size can be stably installed through the device, so that the number of operators is reduced, the situation that operation is tedious due to the fact that the hands are miscellaneous by many people is avoided, and labor expenditure is reduced.

The utility model relates to the field of switch cabinets, and provides an armored switch cabinet with a snow removal function in order to solve the defect that the existing switch cabinet does not have the snow removal function, the armored switch cabinet comprises an armored switch cabinet, a cleaning roller and a scraper, a mounting plate is welded at the top of the rear side of the armored switch cabinet, a first transverse rack is arranged on one side of the top of the mounting plate, and a second transverse rack is arranged on the other side of the mounting plate. A second transverse rack is welded to the middle of the top of the mounting plate, an electric sliding table is fixedly mounted at the bottom of the mounting plate, a moving plate is fixedly mounted at the output end of the electric sliding table, a connecting shaft is rotationally connected to one side of the moving plate, a reciprocating lifting mechanism for driving the sweeping roller and the scraper to reciprocate is arranged on the connecting shaft, and a limiting mechanism is arranged above the mounting plate. According to the snow removing mechanism, two different snow removing modes are matched to remove accumulated snow through left-right reciprocating movement of the mechanism, cleaning is more thorough, time and labor are saved, and workers are prevented from climbing to eliminate danger; the whole mechanism does not need a plurality of driving devices, the linkage is high, and the working process is coherent.