30results about How to "Avoid contact opportunities" patented technology

The invention discloses a method for synthesizing cyclohexanone dimer by continuous catalytic reaction and distillation. The method comprises the following steps that: a catalytic reaction and distillation device shown in a figure is adopted, and cyclohexanone enters the a tower from the middle part of the tower; a cyclohexanone dimer and water azeotropic mixture obtained by the condensation of overhead vapor is subjected to continuous low layer resultant water separation in a water knockout vessel, and the upper layer cyclohexanone flows into the top of the tower; and tower bottom residue is heated by a reboiler, the temperature of the residue is controlled to be 250 to 280 DEG C, and 60 to 90 mass percent cyclohexanone dimer can be obtained from liquid discharged from the bottom of the tower. The method adopts continuous catalytic reaction and distillation technology and removes water in products away from a reaction field in time, thereby promoting a reaction to move toward the direction of the formation of the cyclohexanone dimer; meanwhile, the method separates the products of the reaction from a stripping section at the lower part to further eliminate the opportunity for the products of the reaction to contact a catalyst, thereby improving the selectivity of the cyclohexanone dimer, ensuring continuous reaction, high production efficiency and high selectivity of the cyclohexanone dimer, and facilitating industrial production.

The invention discloses a power panel box and a washing machine and relates to the field of washing machines. The power panel box comprises a box body, wherein an accommodating cavity for placing a filter is arranged in the box body; and a limiting structure for limiting the position of the filter is arranged in the accommodating cavity. According to the power panel box and the washing machine disclosed by the invention, the filter is arranged in the power panel box and a sheet metal bracket and bolt structure for fixing the filter is omitted, so that the production cost of the whole washing machine is reduced, the manufacturing and installing processes are simplified and a product has higher market competitiveness. Meanwhile, the filter and a power panel are arranged in the power panel box, so that the contact opportunity of the filter and the power panel and a liquid is completely eradicated and a potential safety hazard is avoided; and on the other hand, the power panel box is made of a metal material, so that the flame retardant property is good and a plug terminal of the filter is safer.

The invention discloses a hydraulic hammer cylinder part. The hydraulic hammer cylinder part comprises a cylinder body, a piston, a piston ring, sealing parts and a reversing valve. According to the hydraulic hammer cylinder part, a left side piston ring cylindrical section of a leftmost sealing part groove of a piston ring inner hole is lengthened by L1, meanwhile, an oil feeding groove is additionally formed in the lengthened part, and a gap sealing section D is formed on the left side of the oil feeding groove, or one or two sealing part grooves are additionally formed in the left side of the oil feeding groove; and in the working process, high-pressure oil is always introduced into the gap sealing section D or the added sealing part grooves, so that the sealing parts in the sealing part grooves are simultaneously subjected to axial compression force and radial compression force under the action of the high-pressure oil, the sealing parts in the grooves are more tightly matched witha to-be-sealed surface, the great supporting effect is achieved on a postmedian section in the piston, so that the severe loss caused by scoring of the piston and the inner hole due to contact of thepiston and the inner hole of the cylinder is effectively avoided.

The invention relates to a built-in sealed continuous ink supply system with a pressure dynamic compensation function. The built-in sealed continuous ink supply system comprises an ink soft bag (1), a pressure dynamic compensation device and a printing head (5). The ink soft bag (1) is positioned above the pressure dynamic compensation device and is connected with an ink inlet (31) of the pressure dynamic compensation device by a soft bag connecting tube (2), an elastic air bag (33) is arranged in the pressure dynamic compensation device, an ink outlet (37) on the lower side of the pressure dynamic compensation device is connected with the printing head (5) by an ink supply tube (4), and the pressure dynamic compensation device is in a sealed state when ink is supplied by the ink inlet (31) and the ink outlet (37). The built-in sealed continuous ink supply system has the advantages that the ink is completely prevented from being in contact with external air, the probability of oxidation, evaporation and crystallization of the ink is reduced, and a phenomenon of head blockage is decreased; problems of air resistance, backflow, misting, overflow and the like can be effectively solved, and the built-in sealed continuous ink supply system is provided with a warning device with functions of ink deficiency voice prompting, corresponding indicator lamp prompting and the like.

The invention provides a non-floor type charging pile. The non-floor type charging pile is characterized by comprising a gantry column, wherein the gantry column comprises two hollow support columns and a transverse beam; the transverse beam is used for communicating the two hollow support columns; a plurality of charging pile bodies are erected on the transverse beam; each charging pile body is a direct current charging pile, an alternating current charging pile or a direct current and alternating current integrated charging pile. The non-flooring type charging pile has the advantages that the structure is novel, the charging pile is disengaged from a floor, and the land occupation is small; the charging operation is performed at a height and position which can be conveniently operated by an adult and easily watched by a driver; a miniature automobile can safely pass through under the gantry column, so that the possibility of contact with children is avoided, the risk is avoided, and the utilization rate of a land area is greatly improved; an electric automobile can be charged by direct current or alternating current, and the electricity utilization requirements of different electric vehicles are met; by using a photovoltaic power generation assembly as an auxiliary power source, the all-weather and all-time charging operation can be realized, and the energy-saving and environment-friendly effects are truly realized.

The invention discloses a furnace cover for producing sponge titanium, which comprises a cylinder, a panel arranged on the cylinder, and a bottom plate under the cylinder, wherein, the furnace cover is provided with an aisle bushing, a feeder bushing and a vacuum pipeline bushing. The furnace cover is characterized in that: a sleeve is arranged below the bottom plate of the furnace cover to ensure that the aisle bushing and the feeder bushing are arranged inside the sleeve, the vacuum pipeline bushing is positioned outside the sleeve, the bottom plate of the furnace cover is of an upward vaulted spherical shape, and a heat insulating material, namely sayla cotton containing zirconium is filled in a cavity enclosed by the panel, the bottom plate and the cylinder. The furnace cover can effectively prevent distilled materials from being directly pumped by a vacuum unit, and does not affect the production of reduction reaction at the same time; the vaulted bottom plate has large anti-deformation ability, which solves the problems of furnace cover deformation, threatening weld craters, short service life and so on. The furnace cover has universal interchange function, avoids distillates from contacting the air to be polluted, and assures the steady operation of the production.

The invention discloses a method for simultaneously preparing enhanced and depletion gate devices and a device. The method comprises the following steps: a source metal and a drain metal are preparedon an epitaxial wafer; a first photoresist is coated and an opening is arranged on the gate bottom of the enhanced device; fluoride ion injection and heat treatment are performed on the bottom of theenhanced device to repair the lattice; the first photoresist is removed, a second photoresist is coated and an opening of which the upper part is wide and the lower part is narrow is arranged on the enhanced gate bottom and the depletion gate bottom; a third photoresist is coated and an opening of which the upper part is narrow and the lower part is wide is arranged on the enhanced gate bottom andthe depletion gate bottom; metal deposition is performed so that the metal is deposited on the enhanced gate bottom and the depletion gate bottom to form the enhanced gate metal and the depletion gate metal; and the second photoresist and the third photoresist are removed. The metal evaporation process of the enhanced gate and the depletion gate is simultaneously performed so as to reduce the primary metal evaporation, save the cost and improve the performance.

The invention discloses a preparation method of electronic grade propylene glycol monomethyl ether and a product obtained by the preparation method, and belongs to the technical field of preparation of fine chemicals. The method comprises the following steps of: 1) mixing methanol, propylene oxide and a basic ionic liquid catalyst, and carrying out reaction in a micro-channel reactor to obtain a reaction solution; 2) removing light components from the reaction solution to obtain a light component removed reaction solution; and 3) evaporating the light component removed reaction solution obtained in step 2), and performing negative pressure rectification on the obtained steam to obtain the electronic grade propylene glycol monomethyl ether. The preparation method of the electronic grade propylene glycol monomethyl ether provided by the invention are mild in reaction conditions, the purity of the prepared product is high, the yield is high, and the activity and selectivity of the catalyst are high.

The invention relates to a physical disconnection network switch. The physical disconnection network switch comprises the following parts: a network signal input/output interface, a signal interruption switching structure and a interruption control switch; the interruption switching structure capable of being controlled by the switch is added in the electronic device network signal connection line, when network connection is not needed, a user can conveniently connect network signals of the electronic device through the interruption control switch, thorough physical disconnection is conducted,and information safety of the electronic device is guaranteed. The network signal connection is disconnected in a physical mode, the basic conditions of hacker infringement and network virus damage are cut off, effective isolation of network intrusion and virus propagation is achieved, the contact time of the electronic device and the network signal is shortened, and the opportunity exposed in front of network harmful information is reduced.

The invention provides a nitrogen control technology for a stranded wire steel series steel grade. The technology comprises the working procedures of selection of low-nitrogen accessories for smelting, LF furnace port positive pressure operation, LF submerged arc refining, continues casting protection casting and steelmaking full-process argon blowing, and the nitrogen content in steel is controlled to be 60ppm or below; and the nitrogen content in the accessories does not exceed 40ppm. The nitrogen increasing phenomenon in the smelting process is effectively restrained, the TiN content in thesteel is sharply decreased, and therefore production of the low-nitrogen steel grade with the nitrogen content being 60ppm or below is achieved.

The invention provides a sample dilution tube and a sampling kit using the same. The sample dilution tube comprises: a tube body; the sealing piston is sleeved on the inner side of the pipe body in a free sliding manner; the sealing cover covers the upper part of the tube body, and a sample introduction channel is formed on the sealing cover; wherein a diluent space is defined by the tube body, the sealing piston and the sealing cover, and when a sample is squeezed into diluent from the sample injection channel, the sealing piston can automatically slide to increase the volume of the diluent space. The opportunity that the sample and the diluent are in contact with the outside air is minimized, the anaerobic environment is kept, and the separation culture efficiency of anaerobic and facultative anaerobic microorganisms in the excrement sample is improved.

The invention discloses a middle cylinder component of a hydraulic breaking hammer. The middle cylinder component of the hydraulic breaking hammer comprises a piston 1, a middle cylinder body 2, a piston ring 3, a sealing piece 4 and a reversing valve 5; a fifth piston rod sealing piece groove 25, a second oil return groove 26, a high-pressure oil groove 27 and a sixth piston rod sealing piece groove 28 are additionally arranged on an original sealing structure which is matched with a piston head in an inner hole of the middle cylinder body 2; an oil feeding groove 36 is additionally formed in an original inner hole sealing structure of the piston ring 3; a radial through hole a is formed in the oil feeding groove 36 and communicated with an oil inlet groove 12 formed in the piston ring; an oil way 13 is arranged on the middle cylinder body 2 and communicated with the high-pressure oil groove 27 and the oil inlet groove 12; and meanwhile the oil way 13 is externally connected with a high-pressure oil supply port 14. According to the invention, the high-pressure oil supporting effect of the front section and the rear section of the piston is enhanced, so that the problems that the piston and the cylinder body are prone to strain, oil leakage and the like in the initial working stage of the breaking hammer are effectively solved.

The invention discloses surgical injection equipment for child treatment, and particularly relates to the field of injection equipment. The surgical injection equipment comprises an outer cylinder, wherein a top cover is arranged at the top of the outer cylinder in a threaded sleeving mode, a bottom cylinder is fixedly mounted at the bottom of the outer cylinder, a needle cylinder is movably arranged at the top of the bottom cylinder in a sleeving manner, and a needle opening pipe is fixedly mounted at the bottom of the needle cylinder; and a push rod is movably arranged at the top of the needle cylinder in a sleeving manner, a piston block is fixedly mounted at the bottom extending into the needle cylinder, of the push rod, and the outer part of the piston block is attached to the inner wall of the needle cylinder. By holding holding rods, at the moment, a power generation assembly drives a corresponding transverse rod to move, and each transverse rod drives a corresponding linkage sleeve to move transversely, so that each linkage sleeve drives a corresponding magnet pipe to move transversely, namely, a magnetic induction line generated by each magnet pipe is cut by a corresponding copper wire, and at the moment, current is generated in each copper wire and fed into a corresponding storage battery through a wire. Therefore, the drive of the surgical injection equipment provides electric power, further the automation process of the surgical injection equipment is realized, and the practicability of the surgical injection equipment is improved.