72results about How to "Avoid operational hazards" patented technology

The invention relates to a method for preparing siloxane potassium alcoholate, which belongs to the field of organic polymerization. The method is characterized by comprising the following steps: preparing a water solution from potassium hydroxide after purification in a reaction bottle, then adding polysiloxane which is well metered, increasing the temperature under the conditions of continuously introducing dry nitrogen and stirring, then opening vacuum, maintaining negative-pressure dehydration, and finishing reaction when observing that no water beads are collected any more to obtain the glutinous siloxane potassium alcoholate. An organic solvent is not used, environmental pollution and operation risk are avoided, and the time required for removing the solvent by increasing the temperature after the end of the reaction can be simultaneously saved.

The invention relates to the automatic rubber mixing process of a mill, and belongs to the field of rubber processing. The process steps are as follows: rubber is fed onto the drum of the mill by a rubber feeding device through an upper station; a rubber mixing step starts; after the rubber passes through a drum gap, an automatic folding-back device receives the rubber and lifts the rubber high before the rubber is re-put into the drum gap; in this way, the rubber passes through the drum gap again and again to be mixed; during the period, the automatic folding-back device clips the rubber to move from side to side so that the rubber is mixed from side to side so as to achieve the function of folding back; during the mixing, weighed remedy is fed into a weightdrop scale driven by wind after the remedy is checked; the rubber is gradually fed into the mill along a remedy sliding chute above the mill through an electric vibrating feeder to complete the course of automatic feeding; after the rubber is mixed, the mixed rubber is conveyed out through an output conveyer belt.

The invention provides an autonomous flight pesticide spraying unmanned aerial vehicle controlled precisely and a plant protection method using the autonomous flight pesticide spraying unmanned aerialvehicle controlled precisely. The autonomous flight pesticide spraying unmanned aerial vehicle comprises a fuselage, four or more rotor wings, an undercarriage, a mounting plate, an externally-hung pesticide box, a control device and a power source. The control device of the unmanned aerial vehicle collects environment data in real time, and comprehensive dynamic adjustment is conducted accordingto the environment data, specifically, the expansion amount of expansion joints is adjusted according to the deviation angle, a wind speed empirical value is added on the basis of the expansion amount, and thus spraying precision is improved; and PWM is adjusted according to the wind speed, the spraying amount is increased, and the unmanned aerial vehicle plans a path automatically and makes a return flight automatically under the situation that the wind speed is too large. According to the autonomous flight pesticide spraying unmanned aerial vehicle controlled precisely, the spraying precision can be effectively improved, and the using safety of the unmanned aerial vehicle is improved.

The invention discloses a relatively mild transparent soap-based cleaning preparation which is characterized by being prepared from organic amine and fatty acid with a heat absorbing function in dissolution, wherein the weight ratio of the fatty acid to the organic amine is 1:(1 to 2.5). The transparent soap-based cleaning preparation is prepared by a method of neutralizing the fatty acid by the organic amine, and has the characteristics of rich foam, easiness in washing, no color change at high temperature, no precipitation at low temperature of 5 DEG C and the like; moreover, the transparent soap-based cleaning preparation is closer to the pH range of human skin, and thus is milder.

The invention discloses a method for preparing alkoxy aluminum. The method comprises the following steps: aluminium powder and / or aluminium yarns and aluminium ingots are put in a reaction vessel; fatty alcohol between C3-C10 is used for reacting in an inert environment, and is divided into two parts; the weight of one part is 10-35 percent of the total weight of the fatty alcohol; the first partof the fatty alcohol is added into the reaction vessel, and is contacted with the aluminium powder or aluminium yarns at the temperature which is 5-25 DEG C lower than the boiling point of the fatty alcohol for initiating the reaction; the second part of the fatty alcohol which is left is continuously added into the reaction vessel after the reaction is initiated, and is continuously reacted withthe aluminium powder or aluminium yarns until the reaction is fully carried out at the temperature which is lower than the boiling point of the fatty alcohol; and the weight of the aluminium powder or aluminium yarns is 0.5-5.0 percent of the total weight of the aluminium powder and / or aluminium yarns and the aluminium ingots. The method has the advantages that a catalyst is not used, the preparation is simple, and the reaction can be carried out fully, stably and fast.

The invention provides a defrosting method of a variable-frequency air source heat pump unit. The defrosting method comprises the following steps that when a defrosting condition is reached, a compressor is reduced to the lowest frequency and kept for 5 seconds, a defrosting mode is started, the frequency of the compressor is increased to the defrosting frequency, the expansion opening degree is adjusted to the defrosting opening degree, then the defrosting frequency is reduced by 5Hz every 30 seconds, the defrosting opening degree is reduced by 4%, and the adjustment is stopped until the frequency is reduced to the defrosting lower limit frequency; and the air exchange temperature, the unit high-pressure value and the defrosting duration are monitored, when any one of the three parametersexceeds a set value, the unit exits the defrosting mode, the frequency of the compressor is reduced to the lowest frequency and kept for 5 seconds, a fan is started and waits for 5 seconds, and the unit is switched back to normal heating. The method can reduce the defrosting switching impact of the air source heat pump, improves the unit safety, and reduces the noise. Meanwhile, the real-time matching of the defrosting heat demand and the unit heat supply can be kept, the total defrosting time is shortened, and the defrosting energy consumption is reduced.

The invention discloses a self-locking cable hooker suspension device. The self-locking cable hooker suspension device comprises a vice jaw part, a rod part and a handle part which are connected in sequence, wherein the vice jaw part comprises a fixed vice jaw and a movable vice jaw; the rod part comprises an extension rod and a pull rod; the handle part comprises a fixed handle and a movable handle; the fixed vice jaw is fixed at the upper end of the extension rod; the movable vice jaw is articulated with the fixed vice jaw; the lower part of the movable vice jaw is articulated with the pullrod in the extension rod; the fixed handle is fixed at the lower end of the extension rod; the movable handle is articulated with the pull rod, and meanwhile, the head of the movable handle is articulated with the fixed handle; and a self-locking mechanism causing the vice jaw part to lock by itself is arranged at one end, close to the vice jaw part, of the interior of the extension rod. The self-locking cable hooker suspension device has the beneficial effects that the self-locking mechanism is driven by pinching the vice jaw part so as to cause the vice jaw part to lock by itself, so that the self-locking cable hooker suspension device can be suitable for cable hookers with different diameters; and the extension rod is adjustable in length so as to be suitable for cable steel strands different in height.

The invention discloses a preparation method of an asymmetric aromatic azo compound. The preparation method comprises the following steps: performing condensation on aromatic hydrazine and aryl halide which are used as raw materials in a dichloromethane two-phase system of a solid base catalyst to obtain asymmetric disubstituted hydrazine, and performing catalytic oxidation on the asymmetric disubstituted hydrazine to prepare the asymmetric aromatic azo compound. The asymmetric aromatic azo compound prepared by the preparation method has the yield of above 85% and the purity of 98% and above; compared with the prior art, the preparation method is safe, simple and convenient to operate, greatly improves an operating environment, and avoids of a dangerous diazotization step; moreover, the method is mild in reaction condition, good in selectivity, easy in process control and stable in product quality, can recycle and reuse unreacted organic raw materials, and greatly reduces the treatment intensity of environment-friendly COD, thereby being suitable for industrial production.

The invention relates to a method for achieving classified recovery of metals in circuit boards, in particular to a method for recycling copper, tin, nickel, palladium, gold, silver and resin in the circuit boards. The method comprises the technological processes such as smashing, acid leaching, anode rotating forced-striking electrolysis and floatation. The method comprises the steps that the circuit boards are smashed into tiny fragments firstly; then the tiny fragments are subjected to acid leaching to enable reactive metal tin or nickel to be dissolved out; insoluble substances are placedin an anode rotating forced-striking electrolysis bath to be electrolyzed for recycling copper; anodic filter residues are obtained after filtering is conducted and transferred into water or heavy oilfor floatation, by means of density differences of the metals, resins and solvents, noble metals settles, the resins float on the surface and is separated, and resin powder is recycled on the upper layer; and finally, the noble metals are smelted and further separated. According to the method, various metals and resins can be separated and recycled form the waste circuit boards, and an environment-friendly process for recycling all resources in the circuit boards is achieved.

The invention belongs to the technical field of medical chemistry, and particularly relates to a novel intermediate compound of silodosin, a crystal form of the novel intermediate compound, a method for preparing the same and a novel method for preparing the silodosin by the aid of intermediates. The novel intermediate compound, the crystal form and the methods have the advantages that compounds IV are prepared and transformed into compounds III in hydrochloride forms, accordingly, dehydrogenation impurities can be effectively removed and reduced, and the quality of products can be improved; the methods are easy to implement and high in reaction yield and are safe and controllable, reaction conditions are mild, the products are high in purity, and the novel intermediate compound and the methods are applicable to industrial production.

The invention belongs to the field of pulp making, and particularly relates to a method for making pulp by using plant fiber as the raw material. The method includes the process steps of cleaning, filament rolling, hydrolysis reaction, pressing, grinding and pulping. By adopting a protease aqueous solution to carry out hydrolysis reaction on the plant fiber to hydrolyze the lignin structure, the integrity of the linear macromolecules of the plant fiber can be guranateed to the greatest extent, and the quality of the product is guranateed; meanwhile, the protease aqueous solution can be recycled. According to the method, high temperature and high pressure are not required in the whole pulp production process, and thus the danger of operation is avoided; the whole process can achieve zero discharge of sewage, has no pollution to the environment, and promotes energy conservation and environment protection.

The invention discloses a method and system for generating measurement point alarm and reset information in a background of a distributed control system. The method comprises the steps of: deploying a real-time database, and building a measurement point information table; judging a real-time value in an analog quantity measurement point information table in the real-time database of an upper computer and an alarm out-of-limit threshold value of a measurement point to obtain an analog quantity measurement point line-crossing state result; comparing the line crossing state result of the measuring point with an alarm state stored in a library; according to real-time values and alarm modes in a switching quantity measuring point information table in the real-time database of the upper computer, judging the measuring point alarm state of a switching quantity; comparing the judged alarm state result of the measuring point with an alarm state stored in the library; and ending the background alarm generation process, and continuing the next round of background alarm detection after a fixed period time. According to the method, monitoring hidden dangers caused by loss of alarm and reset messages can be prevented; the situation that messages may be lost due to communication between the upper computer and a lower computer is avoided, and the operation safety of the control system is improved.

The invention relates to a method of recovering metals in circuit boards in a classified manner, in particular to a method of recovering copper, tin, nickel, palladium, gold, silver and resin in PCBs.The method successively comprises the following steps: crushing the circuit boards into fine fragments through process flows such as crushing, acid leaching, anode rotating rattling electrolysis andflotation; then acid-leaching the fine fragments to dissolve active metal tin or nickel; then placing insoluble substances in an anode rotating rattling electrolytic cell to be electrolyzed to recovercopper; then filtering the mixture to obtain an anode filter residue, transferring the anode filter residue to water or heavy oil to be floated, wherein noble metals are settled and resin drifts on the surface by means of density variation of the metals, resin and a solvent, and recovering resin powder in the upper layer; and finally, further separating the noble metals by means of smelting. Themethod provided by the invention is an environment-friendly process which can separate and recover various metals and resins from waste circuit boards, so that all resources in the circuit boards arerecovered.

The invention relates to a process for producing graphite fluoride by a low-temperature intercalation method. The process comprises the following steps of: using antimony pentafluoride intercalated graphite and a fluorine-nitrogen gas mixture to produce graphite fluoride, wherein the fluorine and the nitrogen in the fluorine-nitrogen gas mixture is respectively 10% -30% and 70% - 90 % by mass percentage concentration, the reaction temperature ranges from 200 DEG C to 500 DEG C, and the pressure ranges from 100KPa (Kilopascal) to 300KPa. Then, using the fluorine-nitrogen gas mixture with fluorine and nitrogen respectively of 50% by mass percentage concentration, and antimony powder to directly react for preparing gaseous antimony pentafluoride, and adding the liquid antimony pentafluoride acquired by cooling and expanded graphite to a vacuum container in a mass ratio of 1:1.5 to1:9, controlling the temperature to be 100 DEG C to 150 DEG C, and reacting for more than 12 hours to acquire the antimony pentafluoride intercalated graphite. The graphite fluoride yield can reach 43%- 74%, and the production is safe; simultaneously, the fluorine-to-carbon ratio of the graphite fluoride can be controlled by regulating the reaction time to acquire the graphite fluoride with different fluorine-to-carbon ratios.

The present invention provides a spotlight positioning automatic following system. The system comprises a spotlight, an image generation device, a client control module and a gateway controller. The spotlight is provided with a spotlight control module which is in wireless communication connection with the gateway controller, the spotlight control module controls the beam of the spotlight to follow a specific irradiation pattern or irradiation point irradiated by the image generation device to move, and the spotlight can regulates the irradiation angle and position according to a operator's demand. The operator also can regulate the color temperature and brightness of the light on the client control module so as to reach a perfect object display effect while attracting eyeballs.

The invention discloses a device for hanging cable hooks. The device comprises a jaw part, a rod part and a handle part which are sequentially connected, the jaw part comprises a fixed jaw and a flexible jaw, the rod part comprises a telescopic rod and a pull rod, and the handle part comprises a fixed handle and a flexible handle. The fixed jaw is fixed at the upper end of the telescopic rod, a protrusion is arranged in the middle of the fixed jaw, the flexible jaw is hinged to the fixed jaw, the flexible jaw is hinged to the pull rod in the telescopic rod, the fixed handle is fixed at the lower end of the telescopic rod, the head of the flexible handle is hinged to the fixed handle, and a locking part is arranged on the flexible handle. According to the device for hanging the cable hooks, the cable hooks can be fixed at the upper end of the rod part, and the cable hooks with different sizes can be hanged on a steel strand; the cable hooks can be taken down only by loosening the fixed handle and the flexible handle; the length of the telescopic rod is adjustable, and the device is suitable for cable steel strands with different heights and convenient to carry; the size of the jaw is adjustable, and installation requirements of the cable hooks with different sizes can be met.

The invention provides a section-bar cutting device which comprises a fixing base, an angle adjusting mechanism and a section-bar fixing device. The angle adjusting mechanism is arranged on the fixing base and can rotate by an angle on the fixing base and be fixed. The section-bar fixing device is arranged on the angle adjusting mechanism and fixedly connected with the angle adjusting mechanism. A section bar can be obliquely fixed through the section-bar fixing device relative to the angle adjusting mechanism.

The invention discloses a punching-preventing safety device for a pneumatic-hydraulic punch, which is arranged between an upper mould and a lower mould. The upper mould is fixed on a main punching shaft, while the lower mould is fixed on a punch operating platform. The device is provided with a starting detecting mechanism capable of detecting that the upper mould contacts a work piece arranged on the lower mould, an insulation detecting circuit capable of detecting the insulativity of the work piece, and a controller capable of controlling the punching of the pneumatic-hydraulic punch according to the starting detecting mechanism and the insulation detecting circuit. A pneumatic cylinder on the punch is started by the controller and stops punching when the starting detecting circuit detects that the upper mould contacts the work piece. An oil hydraulic cylinder on the punch is started to punch by the controller when the insulation detecting circuit detects that the work piece is an electrical conductor. The punching-preventing safety device for the pneumatic-hydraulic punch can effectively prevent the wrong punching of the punch, thereby preventing potential operation risk and improving the operation efficiency.

The invention discloses an insulation sleeve. The insulation sleeve comprises a terminal, an upper flange, an upper sealing plate, an insulating tube, a conducting rod, a lower flange, a lower sealingplate and a shielding electrode. The conducting rod is coaxially installed in the insulating tube and passes through the shielding electrode. One end of the conducting rod is fixedly connected to theupper sealing plate. The upper sealing plate is fixedly arranged on one end of the insulating tube through connection with the upper flange. The lower sealing plate is provided with the shielding electrode. The lower sealing plate is fixedly arranged at the other end of the insulating tube through connection with the lower flange. A protection cover is wrapped on at least one of a peripheral surface of the upper flange and a peripheral surface of the lower flange, wherein the peripheral surface of the upper flange is connected to the upper sealing plate, and the peripheral surface of the lower flange is connected to the lower sealing plate. The invention also discloses the protection cover used for insulating sleeve repairing and a repairing method of the insulating sleeve. Through wrapping the protection cover in advance, water vapor is kept out of the protection cover, a sealing environment in the insulation sleeve is ensured, an insulation sleeve electrode breakdown phenomenon is avoided, reliability of high pressure equipment operation is increased, and a service life of the insulation sleeve is prolonged.

The invention discloses an auxiliary feeding device of a forging hydraulic press. The device comprises a base, a support rod, a fixing frame, a moving mechanism, a clamp mechanism and a control box, wherein the support rod is arranged at the central position of the rear side of the top end of the base in the up-and-down direction, the fixing frame is detachably and fixedly arranged at the top endof the support rod through a screw, the moving mechanism is arranged at the front side of the bottom end of the fixing frame, the clamp mechanism is arranged at the bottom end of the moving mechanism,and the control box is arranged at the right rear portion of the top end of the base in the up-and-down direction. According to the auxiliary feeding device of the forging hydraulic press, automaticfeeding of a metal blank can be realized, and several workers do not need to manually cooperate and use tools for feeding, so that manpower waste is avoided, useless operation items are reduced, and operation danger caused by the high temperature of the metal blank is avoided.

A grinding wheel clamp capable of being used on a lathe belongs to the technical field of machining equipment, comprises a chunk, clamping jaws and a grinding wheel and further comprises a stepped shaft, a grinding wheel blocking sheet and a clamp nut, wherein an external thread is arranged on the periphery of the small end of the stepped shaft; a central hole is formed in the center of the head part of the small end of the stepped shaft; the grinding wheel is mounted with one surface against a shaft shoulder of the stepped shaft; the grinding wheel blocking sheet abuts against the other surface of the grinding wheel; and the clamp nut is tightened on one side of the grinding wheel blocking sheet through the external thread. The grinding wheel clamp is simple in structure; the grinding wheel clamp with the grinding wheel can be placed on the lathe to be used; the grinding wheel clamp is clamped in the chunk and propped against a centre, so that as the chunk of the lathe rotates, the grinding wheel clamp can be driven to rotate to realize grinding of a cutter on the lathe; and the grinding wheel clamp is simple and convenient to mount and dismount, can avoid operation danger caused by gathering of people during a practical training process, and improves the efficiency of practical skill training.

The invention discloses a discharger with an automatic opening and closing function, and relates to the technical field of manufacturing of discharging equipment. The following scheme is provided forsolving the problems that a traditional discharger cannot achieve automatic opening and closing and cannot rapidly adsorb dust to the exterior of the equipment, the discharger comprises a bottom plate, a discharging box is fixedly connected to the top of the bottom plate, an automatic opening and closing device is connected to the interior of the discharging box, a fixing plate is fixedly connected to the top of the discharging box, a supporting block is fixedly connected to the top of the bottom plate, a driving motor is fixedly connected to the top of the supporting block, a first rotating shaft is fixedly connected to an output shaft of the driving motor, and the exterior of the first rotating shaft is connected with a transmission system. According to the discharger with the automaticopening and closing function, opening and closing can be automatically achieved at a feeding port, the operation risk is reduced, meanwhile, the dust can be rapidly adsorbed to the exterior of the discharging box through a dust suction fan, the workload of cleaning the interior of the discharging box is reduced, and the service life of the discharger is prolonged.

The invention discloses a waste heat recovery process. The waste heat recovery process can fully recover exhaust emission heat energy and burn non-condensable gas, heat exchange circulation high-concentration sewage id discharged into a collecting tank and then into a sewage treatment system for treatment, and exhaust emission heat energy is recovered through two-stage heat absorption and accumulation. The invention also provides a waste heat recovery device. The waste heat recovery heat fully absorbs and utilizes exhaust waste heat and meanwhile achieves harmless treatment on the non-condensable gas to achieve zero-pollution emission. The waste heat recovery device is simple in operation, safe in working and free from pollution, and can meet demands on scale production, save cost and achieve high in economic benefits.

The invention discloses an intelligent full-automatic bearing press-fitting machine which is integrally composed of a bearing feeding line, a press-fitting sleeve, a bearing feeding mechanical arm, abearing press-fitting machine main frame, a press-fitting main oil cylinder, a wheel set lifting mechanism and a bearing rotation detection mechanism. According to the intelligent full-automatic bearing press-fitting machine, the process of replacing a press-fitting guide sleeve and a press-fitting head in the press-fitting process of different types of wheel set bearings is omitted, and automaticfeeding and automatic press-fitting of the bearings are achieved; and meanwhile, automatic rotation detection of the bearings is achieved in the bearing press-fitting process, the labor intensity ofoperators is relieved, and the working efficiency of bearing press-fitting is greatly improved.

The invention discloses a feeding and discharging machine for a cross cut shear line. The machine comprises a displacement device and a rotary feeding and discharging device which are fixedly installed on a bottom plate, the displacement device comprises a base and a displacement transmission structure arranged in the base, and the rotary feeding and discharging device is fixedly arranged on the displacement transmission structure. The rotary feeding and discharging device comprises a rotary jacking structure fixedly installed on the displacement transmission structure, a pallet fork structureon the rotary jacking structure is fixedly installed on the rotary jacking structure, the displacement transmission structure comprises sliding rails symmetrically arranged on the base, and racks parallel to the sliding rails are arranged on the inner wall of the base. A displacement plate is fixedly installed on the sliding block on each sliding rail, a displacement driver is arranged on each displacement plate, a displacement driving gear is fixedly arranged on an output shaft of each displacement driver, and each displacement driving gear is meshed with the corresponding rack. By means ofthe manner, automatic feeding, discharging and heavy loading can be achieved, the positioning precision is high, transportation is stable, product transfer transportation is smooth, and the transportation efficiency is greatly improved.

The invention discloses a stereo garage safety detection method, and belongs to the technical field of stereo garages. When a vehicle runs to a cache region, a vehicle detector determines that the vehicle is a vehicle, a height detection module sends a height detection signal of the vehicle to a controller of a stereo garage, and the controller judges whether the vehicle is too high or not; if thevehicle is not too high, the controller provides a parking space for an entrance and exit of the stereo garage, and a garage door is opened; when the vehicle enters the garage, whether the vehicle isin place or not is detected; if the vehicle is in place, whether the vehicle is too long and too wide or not is detected; if the vehicle is not too long and too wide, the controller judges whether adriver leaves the garage or not; if the driver leaves the garage, the controller authorizes the operation right of a garage operator, and vehicle storage is allowed; and in the closing process of thegarage door, if a door anti-pinch detection module has no signal, the garage door is closed to be completely closed. According to the method, the vehicle is subjected to ultrahigh detection outside the stereo garage, whether the driver leaves the garage or not is determined, and the operation of the stereo garage and the safety of the driver are effectively guaranteed.