1350results about How to "Operational security" patented technology

The invention relates to the technical field of biological sewage treatment, in particular to a device and a method for improving the autotrophic nitrogen removal performance of an MABR (Membrane Ammonia Baffled Reactor). Coupling of partial nitrosation reaction and anaerobic ammonia oxidation reaction is completed; through a circular reaction zone and a membrane reaction zone in the reaction tank, nitrate nitrogen generated by anaerobic ammonia oxidation and excessive nitrite nitrogen during instability regulation are circularly removed, and the purpose of improving the total nitrogen removal effect of the reactor is achieved; a proper amount of a sodium nitrite solution is added at proper time, the concentration of free nitrous acid in a mixed solution of the reactor is increased, and the intermittent proportion of MABR intermittent aeration is synchronously regulated and controlled, so that the activity of nitrite oxidizing bacteria is synergistically inhibited by low dissolved oxygen and high free nitrous acid, and the unstable short-cut nitrification reaction is recovered again; the autotrophic nitrogen removal performance of the reactor is improved.

The invention discloses an internal circulation rotating impinging stream electro-catalysis device and method for treating organic wastewater, and belongs to the technical field of sewage treatment equipment. The upper part of an inner cavity of an electrochemical reactor of the device is an electrochemical reaction area, and the lower part is a rotational flow generation area; the electrochemical reaction area comprises an outer ring anode, an annular net-shaped cathode, an inner ring anode and a central fixing shaft which are sequentially and coaxially sleeved from outside to inside, and the rotational flow generation area comprises an inner spiral generator and an outer spiral generator which are arranged on a spiral central shaft in a sleeving manner. The impinging stream technology and the electro-catalysis technology are combined, internal circulation impinging stream efficient treatment on organic wastewater is achieved through the rotational flow generation area, the device has the advantages of being high in treatment efficiency, small in occupied space, low in operation energy consumption and the like, the problem that bubbles adhere to the surface of an electrode can be solved, strong turbulent flow is formed through impinging, reaction dead zones are reduced, and the service life of the device is prolonged. Mass transfer in the electrochemical degradation device is enhanced, and the purposes of automatic operation and efficient degradation are achieved.

The invention discloses a construction method and application of an electrochemical luminescence (ECL) antifouling sensor based on zwitter-ion hydrogel, and belongs to the technical fields of photoelectric sensing analysis, interface antifouling and environmental science. According to the invention, the hydrogel based on sulfobetaine methacrylate zwitterions and bovine serum albumin is used as the antifouling coating, so that the adsorption of biological proteins and bacteria is effectively hindered, and the service life of the sensor is prolonged. Meanwhile, the interior label Au (at) luminol is packaged in the antifouling hydrogel, so that the integration of interface antifouling and ratio detection is realized, the detection accuracy is improved, and the construction process of the ECL sensor is simplified. The constructed ECL anti-pollution sensor has high sensitivity to chloramphenicol detection, the detection limit is 0.39 pM, and the ECL anti-pollution sensor is suitable for trace detection of antibiotics in seawater.

The invention relates to a vertical chemical vapor deposition furnace which comprises a vertical furnace tube, a liftable furnace door arranged below the furnace tube, a wafer boat assembly, an overturning table assembly, a lifting table assembly, a storage area, a temporary storage area, a wafer conveying box manipulator assembly and a wafer fork hand assembly, the overturning table assembly comprises an overturning table and an overturning driving mechanism for driving the overturning table to overturn; the overturning table is provided with at least one storage position for fixing a wafer conveying box; the lifting table assembly comprises a lifting table arranged below the overturning table, a carrier roller horizontally arranged on the lifting table, a rotation driving mechanism for driving the carrier roller to rotate and a lifting driving mechanism. The automatic edge flattening and arraying device has the advantages that automatic edge flattening and arraying can be achieved, automatic assembly line work of arraying feeding is achieved, and production efficiency is improved. By designing the independent fork hand and the fork hand set which are driven respectively, the function that the independent fork hand stretches out independently during small-batch trial-manufacturing is achieved, the independent fork hand and the fork hand set conduct overall synchronous telescopic operation during large-batch production, and the production efficiency cannot be reduced.

The invention discloses a mining cable automatic moving, dismounting and mounting device which is characterized by comprising a chassis assembly, the distance between two longitudinal bottom beams of the chassis assembly is adjustable, and the chassis assembly is used for bearing all mechanisms of the device and achieving walking; the lifting mechanism is arranged on the two longitudinal bottom beams of the chassis assembly and used for supporting a cable drum to be operated; the rotation driving mechanism is hinged to the chassis assembly, abuts against the outer edge of an end disc at one end of the cable drum and is used for driving the cable drum to rotate, and the cable winding and unwinding function is achieved; the cable arrangement mechanism is arranged on the two fixed stand columns of the chassis assembly and used for guiding the cable when the cable is taken up and paid off; and the cable conveying mechanism is arranged on the sliding frame of the cable arranging mechanism and is used for enabling the cable to keep a certain tension force and transmission force. The device can realize automatic carrying, dismounting, mounting and cable reversing operation of the cable, improves the working efficiency, and reduces the labor intensity of workers.

The invention relates to plasma gun automatic spraying equipment which comprises a workbench, an X-axis moving assembly, a Y-axis moving assembly and a rotating shaft assembly, the X-axis moving assembly, the Y-axis moving assembly and the rotating shaft assembly are located above the workbench, the rotating shaft assembly is connected with an ion gun fixing support, and the X-axis moving assembly, the Y-axis moving assembly and the rotating shaft assembly move independently or cooperatively. And the plasma gun on the ion gun fixing bracket is driven to spray the workpiece according to the set motion path. Through an advanced automatic control system and an intelligent adjusting function, the spraying process can be accurately controlled without manual intervention, the consistency of the production efficiency and the spraying quality is remarkably improved, meanwhile, the dependence on manual operation is reduced, and the equipment maintenance cost is reduced. The equipment disclosed by the invention has higher adaptability, can be automatically adjusted to adapt to different types of workpieces, has a fully automatic spraying process, has higher application and popularization values and is suitable for large-scale production.

The invention relates to the technical field of auxiliary welding devices, and discloses an auxiliary welding device for electric vehicle production, which comprises a base, a welding mechanism is fixedly mounted at the top of the base, a fixing table is fixedly connected to the top of the base, and a reinforcing mechanism is arranged on the inner wall of the fixing table. A worker can use a rocking handle to drive a first clamping plate to move to clamp a welded part, the welded part is prevented from deviating when welded, errors of operators are reduced, it is ensured that welded parts are aligned correctly, the welding stability is better, and the welding precision is higher; the first clamping plate can be driven by the motor to move so as to adjust the height of a welding part, the situation that the device cannot adapt to the welding parts of different shapes during welding is avoided, the safety of welding personnel is guaranteed, the reinforcing time is shortened, the welding efficiency is improved, and the welding quality is better.

The invention is suitable for the technical field of catalyst preparation, and provides a high-stability ruthenium-based catalyst and a preparation method thereof.The preparation method comprises the following steps that ruthenium salt, doped salt and molten salt are ground to be evenly mixed, poured into a porcelain boat, subjected to heat preservation at 550 DEG C for 3-5 h, taken out after being naturally cooled, heated in a water bath and then washed with water, then soaked with 0.5 mol / L sulfuric acid for 24 h and subjected to ultrasonic treatment for 2 h, and the high-stability ruthenium-based catalyst is obtained; and continuously washing with water, washing with absolute ethyl alcohol once, and drying to obtain the product. The performance of the catalyst is improved by replacing part of Ru atoms with Ge atoms; by adopting the improved molten salt method, the operation steps are simplified, and the reaction temperature is reduced. After the catalyst is subjected to water bath heating, acid soaking and ultrasonic treatment, uniform dispersion is realized, and salt residues are reduced. The method is simple and safe to operate, the adopted molten salt is low in price and has the potential of large-scale production, and the activity, dispersity and stability of the catalyst are further improved.

The invention relates to the technical field of greenhouse environment control, and discloses a solar greenhouse heat preservation quilt limiting control which comprises limiting assemblies installed on the two sides of a greenhouse in parallel and used for driving a heat preservation quilt shaft to be wound and unwound and covering ventilation openings formed in the two sides of the greenhouse; the limiting assembly comprises vertical rods, the multiple vertical rods are installed on the equidistant ground on the two sides of the greenhouse and used for being connected with displacement rods in a hinged mode, and tilt angle sensors are installed on one sides of the displacement rods, located on the sides, connected with the vertical rods, of the displacement rods and used for collecting tilt angle amplitude data after the displacement rods stretch out. Through integration of an intelligent control system and various sensors, highly automatic control of greenhouse facilities is achieved, the system can monitor environmental data in real time and automatically adjust heat preservation quilts, ventilation, light supplement and irrigation equipment, and it is ensured that the internal conditions of the greenhouse are always in the optimal state.

The utility model relates to the technical field of door and window processing, and provides a square window frame assembly table which comprises a base assembly, a first cross beam assembly and a second cross beam assembly, the first cross beam assembly and the second cross beam assembly are sequentially arranged on the base assembly in the Y direction, the first cross beam assembly is fixed to the base assembly, and the second cross beam assembly is fixed to the base assembly. The second cross beam assembly is arranged on the base assembly in a sliding mode through a first driving assembly, the first cross beam assembly is sequentially provided with one-to-one clamping machine heads and one-to-two clamping machine heads in the Y direction, the second cross beam assembly is sequentially provided with two-to-one clamping machine heads and two-to-two clamping machine heads in the Y direction, and the one-to-one clamping machine heads and the two-to-one clamping machine heads are fixedly arranged. And the first and second clamping machine heads and the second and second clamping machine heads are movably arranged. According to the assembly table, the square window frame can be quickly assembled by adjusting the position and action of the machine head, and the assembly table is easy to operate, high in assembly precision, high in efficiency, stable in positioning and safe to operate.

The invention relates to the technical field of water treatment, in particular to an efficient scale and corrosion inhibitor and a preparation process thereof. The method comprises the following steps: 1, preparing materials; step 2, operating a first reaction kettle; step 3, operation of a second reaction kettle; step 4, performing subsequent operation; according to the efficient scale and corrosion inhibitor and the preparation method thereof, the adding quality and operation parameters of all the raw materials are controlled, the stability of the product quality is improved, PBTC can effectively disperse insoluble inorganic salt, industrial equipment is protected, and the water treatment efficiency is improved; pESA is green, environment-friendly and biodegradable, and has good scale dispersion and corrosion inhibition effects; the sodium formate solution promotes system stability and smooth reaction, the deionized water is added twice, the reaction process is effectively controlled, the product uniformity is improved, an efficient and reliable solution is provided for water treatment through the synergistic effect of all the components, meanwhile, multiple discharging modes are flexibly selected, and the production cost is reduced. And the convenience and the practicability of production are further improved.

The invention relates to the technical field of electric heating materials, in particular to a temperature-controllable electric heating compound and a preparation method thereof. The invention provides a temperature-controllable electric heating compound which comprises a composite heating layer, a packaging insulating layer and a copper foil electrode clamped between the composite heating layer and the packaging insulating layer, a matrix insulating layer is arranged below the composite heating layer, and a series of regularly arranged circular holes are formed in the composite heating layer; and the packaging insulating layer packages the copper foil electrode and the composite heating layer on the substrate insulating layer. The composite heating layer is provided with a series of regularly arranged circular holes, so that the temperature distribution is more uniform, and the accuracy of temperature control can be improved. The supporting performance, the fatigue resistance and the bending resistance are achieved, and the risk of electric breakdown is reduced. Therefore, the method has a wide market application prospect. Meanwhile, the invention further provides a preparation method of the temperature-controllable electric heating compound, and the preparation method is simple in step, convenient to operate and suitable for large-scale industrial production.

The utility model relates to a special vehicle for hydrogen storage, hydrogen transportation and dehydrogenation. The special vehicle mainly comprises a container and a transportation vehicle, wherein the container is provided with hydrogen storage, hydrogen transportation and dehydrogenation equipment; the equipment for storing, transporting and dehydrogenating the hydrogen is arranged in a container to form the container provided with the equipment for storing, transporting and dehydrogenating the hydrogen; the container is fixed on the chassis of the transport vehicle to form a whole body, so that the special vehicle for storing, transporting and dehydrogenating hydrogen is formed; the special vehicle disclosed by the utility model can be used for implementing a coordinated service of hydrogen storage, hydrogen transportation, dehydrogenation and hydrogen supply, has the advantages that the hydrogen storage capacity of a transportation vehicle is high, hydrogen transportation and dehydrogenation are carried out at normal pressure, hydrogen transportation at normal pressure is safe and reliable, potential safety hazards possibly occurring in transportation of hydrogen stored in a high-pressure bottle are overcome, and the special vehicle has good industrial practicability.

The invention relates to the technical field of ship engine manufacturing and machining, in particular to a machining method of a special-shaped locking gasket with a hole and a stamping die tool of the special-shaped locking gasket with the hole. Comprising a base, a blanking and punching die, discharging rubber, a discharging plate, an upper support, a die handle, a pushing rod, a base plate, a male die base, a blanking female die, a discharging device, a pushing block and a punching male die, a machine tool is started, an upper die of the punching die tool is lifted and separated from a lower die, then a long-strip-shaped plate blank is placed on the discharging plate, the upper die of the punching die tool is pressed downwards to a fixed distance, and the punching male die is pressed downwards. The special-shaped stop gasket with the hole is punched by pushing the push rod to eject the punched and formed special-shaped stop gasket with the hole down, one-time punching machining of the special-shaped stop gasket with the hole is completed, and continuous punching machining can be carried out by repeating the operation, so that the machining efficiency of the special-shaped stop gasket with the hole is improved. By the adoption of the structure, one-time stamping forming of the special-shaped locking gasket with the hole is achieved, the process route is simple, operation is easy and convenient, and the requirement for mass production can be met.

The invention provides tundish stuffing sand and a preparation method thereof, and belongs to the technical field of steelmaking continuous casting. The invention relates to tundish drainage sand, which is prepared from the following components in parts by weight: 40 to 60 parts of magnesite sand, 15 to 35 parts of dolomite sand, 10 to 30 parts of raw perlite, 5 to 15 parts of kyanite, 10 to 30 parts of rare earth mineral powder and a binder. The weight part of the rare earth mineral powder is 2-5, and the weight part of the binder is 1-3. The tundish stuffing sand is suitable for a stopper-free flow control pouring method, the automatic pouring rate is increased, and molten steel pollution is reduced.

The invention discloses an application of a boron nitride non-metal catalyst in acetylene hydrochlorination reaction, and a preparation method of the boron nitride non-metal catalyst comprises the following steps: 1) adding a boron-containing compound, a nitrogen-containing compound and a halide into deionized water, and fully dissolving to obtain a mixed solution; secondly, adding a template agent KIT-6 into the mixed solution, and uniformly stirring; transferring into a hydrothermal reaction kettle with a polytetrafluoroethylene lining, purging air in the reaction kettle with nitrogen, sealing, and reacting at 250-400 DEG C for 20-40 hours; and 2) after the reaction is finished, carrying out suction filtration and washing on a product with deionized water, transferring the product into an HF solution to be soaked so as to remove the residual template agent, then washing the product with deionized water until the product is neutral, and drying the product to obtain the boron nitride non-metal catalyst. The preparation method of the catalyst is simple, and the catalyst has high activity and high stability at a low reaction temperature.

The invention relates to a wafer conveying box arrangement device which comprises a turnover table assembly, a lifting table assembly, a storage area and a wafer fork hand assembly. The overturning table assembly comprises an overturning table and an overturning driving mechanism for driving the overturning table to overturn between a first limit position and a second limit position; the overturning table is provided with at least one storage position for fixing a wafer conveying box, and when the overturning table is located at a first limit position, wafers in the wafer conveying box at the storage position are approximately horizontally placed; when the overturning table is located at a second limit position, the wafers in the wafer conveying box at the storage position are approximately vertically placed; the lifting table assembly comprises a lifting table arranged below the overturning table, a carrier roller horizontally arranged on the lifting table, a rotation driving mechanism for driving the carrier roller to rotate and a lifting driving mechanism. And the lifting driving mechanism is in transmission connection with the lifting table and is used for driving the lifting table to lift, so that the carrier rollers on the lifting table can just vertically abut against the wafer on the overturning table at the second position.

The invention discloses a driving arm type bidirectional rotating gate which comprises a rotating gate body, a hydraulic oil cylinder and a locking device, and the hydraulic oil cylinder and the locking device are both installed on gate piers on the two sides of the rotating gate body. The rotary gate comprises a gate body, a supporting arm and a driving arm, the supporting arm and the driving arm are arranged at the two ends of the gate body, the gate body and the supporting arm are connected or welded into a whole through high-strength bolts, one end of the driving arm is installed at the rotating center of the supporting arm, the driving arm and the supporting arm are hinged to a supporting hinge installed in a gate pier, and the other end of the driving arm is hinged to a gate pier. The middle of the driving arm is connected with the supporting arm through a pin shaft, the other end of the driving arm is connected with a hanging head of the hydraulic oil cylinder through a pin shaft, and the rotary gate is driven by the hydraulic oil cylinder to rotate around the supporting hinge. And a locking bolt of the locking device is inserted into a locking pin hole in the support arm to lock the rotary gate. The method is convenient to operate, high in efficiency and safe and reliable in operation process.

The utility model discloses a corner cutting device for insulation pad processing, which comprises a cutting table, a cutting frame is arranged on the cutting table, the cutting frame is of a C-shaped structure, a cutting structure is arranged on the cutting frame, and the cutting structure comprises an electric telescopic rod, a supporting seat, a pressing positioning piece and a guide rod. The electric telescopic rod is arranged at the top of the cutting frame, guide grooves are formed in the opposite side walls in the cutting frame, the two ends of the supporting seat are slidably arranged in the two guide grooves, the free end of the electric telescopic rod is connected with the supporting seat, and the two guide rods are slidably arranged at the two ends of the supporting seat in a penetrating mode. And the hold-down positioning piece is arranged at the bottoms of the two groups of guide rods. The utility model relates to the technical field of cutting equipment, and particularly provides a corner cutting device for insulation pad processing.

The invention relates to an electric actuator which comprises an electric actuator shell, a control panel with electricity storage and discharge functions and a driving part. A storage and discharge module is arranged on the control panel, when an external power source is connected, the actuator uses electric power provided by the external power source, the electric power is regulated and controlled by the control panel to drive the driving component to work so as to drive the valve to be opened and closed, and meanwhile the external power source is used for charging the storage and discharge module on the control panel to store energy; when the external power supply is switched off, the control panel outputs electric energy, and the driving motor and the gear transmission part work and drive the valve to reset to a preset safe reset position. Compared with a traditional power-losing spring reset product, the super capacitor on the control panel is used as an energy storage medium, the reset position can be adjusted at will, when an external power source is normal, the action of the electric actuator does not need to overcome spring resistance, energy consumption in the working process is saved, the structure of the actuator is more compact, and the service life of the actuator is prolonged. The use is safer and more stable.

A method for extracting and separating rhenium and molybdenum using a two-phase aqueous system composed of glycerol block polyether, wherein the two-phase aqueous system is composed of glycerol block polyether, ammonium sulfate and water, wherein the mass percentage concentration of glycerol block polyether and ammonium sulfate is 2% to 40%, and the mass ratio of ammonium sulfate, glycerol block polyether and water is 1:(0.5 to 3):(3 to 8). The mass ratio of the two-phase aqueous system to the rhenium and molybdenum solution to be separated is 1:(1 to 5). The pH of the mixed solution of the two is adjusted to 1 to 7, and the mixture is stirred and reacted at 20 to 60° C. for 2 to 30 minutes, and then allowed to stand and separated to obtain two aqueous phases rich in rhenium and rich in molybdenum, thereby achieving separation of rhenium and molybdenum; the glycerol block polyether is prepared by ring-opening polymerization of glycerol with ethylene oxide and propylene oxide. The glycerol block polyether has many active groups, and thus the amount used is small. The invention has the ability to treat rhenium and molybdenum ions within a relatively wide concentration range, and has the outstanding advantages of high separation efficiency, mild conditions, safe operation and environmentally friendly process.

The utility model relates to the technical field of electric connectors, in particular to an automobile non-shielding fast-charging connector, which comprises a socket assembly, a plug assembly and a locking bolt, the socket assembly comprises a socket shell, a high-voltage copper column assembly and a low-voltage assembly are fixedly arranged in the socket shell, the plug assembly comprises a plug shell, and the locking bolt is arranged in the plug shell. The plug shell is provided with a bolt installation cavity and a cable installation cavity which are communicated in a crossed mode, a high-voltage copper bar assembly and a low-voltage male terminal assembly are fixedly installed in the bolt installation cavity, and a turning cover is arranged at the top of the bolt installation cavity. The electric connector is high in safety performance, safe connection between terminals is effectively guaranteed, safe connection between the socket assembly and the plug assembly is guaranteed, and the safety performance of the electric connector is improved. Non-specialized personnel are prevented from easily opening the electric connector and touching electrified elements by mistake, the plug-in mounting and use are convenient, the professional personnel can conveniently maintain and adjust, the high-voltage interlocking function is realized, the high-voltage interlocking is effectively ensured to be removed during maintenance, and the safe operation of the maintenance personnel is ensured.

The utility model relates to an oil pumping device of an industrial robot gearbox. The utility model is suitable for the technical field of robot oil pumping. The technical problem to be solved by the utility model is to provide the oil pumping device of the industrial robot gearbox. According to the technical scheme, an oil storage cavity is formed in the oil storage tank, the top of the oil storage tank is connected with an oil inlet pipe and an air inlet / outlet pipe which communicate with each other, and the bottom of the oil storage tank is connected with an oil outlet pipe; an air inlet of the vacuum generator is connected with an external compressed air source, and a vacuum port of the vacuum generator is communicated with the oil storage tank through an air inlet / outlet pipe and can generate negative pressure and form a negative pressure environment in the oil storage tank; the control valve assembly is provided with a first control valve and a second control valve, the first control valve is arranged between an air inlet of the vacuum generator and an external compressed air source, the second control valve is arranged between a vacuum opening of the vacuum generator and the air inlet / outlet pipe, and the first control valve and the second control valve are matched with each other to control and switch negative pressure or positive pressure generated in the oil storage tank.

The invention relates to the technical field of tunnel disease detection, in particular to a water conveyance tunnel underwater intelligent inspection robot and an intelligent inspection method thereof, and the robot comprises a robot platform which is used for executing any maneuvering mode of advancing, retreating, ascending and descending in a target water conveyance tunnel; the navigation and positioning equipment is used for generating a navigation track and positioning information; the muon detection equipment is used for generating a surrounding rock density distribution image and leakage channel data; the sonar detection equipment is used for generating a three-dimensional point cloud image of the water conveyance tunnel; the laser scanning equipment is used for generating a three-dimensional high-resolution point cloud image of the cave wall; the data fusion equipment is used for performing feature fusion processing on the data to generate a tunnel comprehensive state image and a tunnel data report; and the communication control equipment is used for adjusting the advancing direction and the movement speed of the robot platform according to the real-time instruction, the navigation track and the positioning information. Therefore, the problems of high detection cost, high difficulty, low efficiency and the like of the leakage channel of the water delivery tunnel are solved.

The invention discloses a liquid carrier rocket engine multi-ignition system and method, and the liquid carrier rocket engine multi-ignition system comprises a diaphragm storage tank, a plurality of liquid carrier rocket engines and a plurality of ignition control valves; the diaphragm storage box comprises a gas cavity and a liquid cavity; the multiple liquid carrier rocket engines are arranged in parallel and can communicate with the liquid cavity. The number of the ignition control valves is the same as that of the liquid carrier rocket engines, and the ignition control valves are in one-to-one correspondence with the liquid carrier rocket engines; the ignition control valve is configured to control the ignition agent in the liquid cavity to enter the corresponding liquid carrier rocket engine through opening and closing of the ignition control valve, and multiple times of ignition of the corresponding liquid carrier rocket engine is achieved. The multi-engine parallel liquid carrier rocket engine can be ignited multiple times, the structure is simple, operation is safe and convenient, and the ignition stability is high.

The invention discloses application of lupane derivatives in preparation of medicines for preventing and / or treating drug-induced deafness, and belongs to the field of biological medicines. The lupane derivative is represented by Chiisanoside, and experiments prove that the lupane derivative can activate the expression of Dock1 and PIP5K1A, inhibit the expression of Gelsolin and inhibit hair cytoskeleton actin instability induced by ototoxic drugs, and the lupane derivative has the advantages that the lupane derivative can be used for inhibiting the ototoxic drug-induced hair cytoskeleton actin instability, and the lupane derivative can be used for inhibiting the ototoxic drug-induced hair cytoskeleton actin instability; in addition, by activating expression of TGFBR2, SLC7A11 and GPX4 at the same time, hair cell ferroptosis induced by ototoxic drugs can be inhibited; further, the effects of preventing, treating or relieving the drug-induced deafness are exerted. The lupane derivative disclosed by the invention can be further developed into a multi-target therapeutic drug for preventing, treating and relieving drug-induced deafness.

The utility model discloses an underground hydraulic auxiliary drive bridge plug seat sealing device which comprises a booster cavity located in a device body, and the booster cavity is connected with an underground hydraulic environment through a liquid inlet. A piston structure is arranged in the pressurizing cavity in an axial sliding mode and used for opening and closing the liquid inlet. One end of the piston structure is connected with a driving device for driving the piston structure to linearly move, and the other end of the piston structure is connected with a setting pull rod for pulling a setting execution mechanism in the bridge plug structure. High setting force is provided by replacing gunpowder combustion with underground hydraulic boosting, so that the size of the device is reduced.

The invention discloses a special lifting appliance for overturning and closing a sand box for casting, and particularly relates to the technical field of lifting appliances for casting, the special lifting appliance comprises two supporting frames, inner cavities of two first sliding grooves are jointly connected with a hanging mechanism in a sliding mode, and the middle of the front side of the hanging mechanism is fixedly connected with a control box component; and fixing mechanisms are arranged on the left portion and the right portion of the lower side of the hanging mechanism correspondingly, and the sides, close to each other, of the two fixing mechanisms are jointly provided with a casting box component. According to the special lifting appliance for overturning and closing the sand box for casting, the hanging mechanism is controlled through the control box component, so that the rotating groups in bilateral symmetry in the hanging mechanism are far away from each other or close to each other, the lifting appliance can be suitable for different types of sand boxes under the cooperative use of the two fixing mechanisms, and the sand box can be overturned and closed under the action of a hook and an external crane. And under the cooperative use of the positioning part and the second through hole, accurate alignment can be achieved in the box closing operation process, and the application range of the device is wider.

The invention belongs to the technical field of building materials, and particularly discloses a polystyrene board with flame retardant property as well as a preparation method and application thereof. The polystyrene board with flame retardant property provided by the invention comprises the following components: expandable polystyrene, thermosetting resin, a curing agent, organic modified montmorillonite and a coating material, the coating material is prepared from a diatomite-based flame retardant, silicon dioxide aerogel and nano cellulose; the diatomite-based flame retardant is gemini quaternary ammonium salt modified diatomite. On the premise of meeting the mechanical strength, the polystyrene board provided by the invention has lower heat conductivity coefficient and excellent fire resistance, and can reach the fire-resistant A-grade standard. The invention also provides a preparation method of the flame-retardant polystyrene board. The preparation method has the advantages of simple process, easily available raw materials, safety in operation, easiness in popularization and application and the like. The method can be applied to the field of preparation of building walls or wall materials.

The utility model discloses an electric tool battery pack impact test device, which relates to the field of battery testing and comprises a test board, a placement groove is formed in the top of the test board, an installation groove is formed in the test board, and a supporting assembly corresponding to the placement groove in position is movably installed in the installation groove. A protection frame located on the outer side of the containing groove is fixedly installed at the top of the test table, and a fire extinguishing water tank located below the containing groove is placed at the bottom of the test table. According to the utility model, the battery pack is placed above the supporting assembly in the placing groove, and the supporting assembly is used for supporting the battery pack and clamping and fixing the battery pack from the side surface; the impact adjusting assembly detects temperature change through the supporting assembly and controls the supporting assembly to be opened when the battery pack is tested to be on fire, so that the battery pack falls into the fire extinguishing water tank through the placing groove for rapid fire extinguishing, and therefore the device is safer to operate and better in practicability.