805results about How to "Avoid cross contamination" patented technology

The embodiment of the invention provides a cleaning assembly replacement base station, and the base station comprises a cleaning assembly carrying unit which is used for carrying a cleaning assembly dismounted from cleaning equipment, and carrying a cleaning assembly to be mounted of the cleaning equipment; the cleaning assembly storage unit is used for storing the detached cleaning assembly and storing the cleaning assembly to be installed; and the cleaning assembly conveying mechanism is used for conveying the detached cleaning assembly from the bearing unit to the storage unit and conveying the cleaning assembly to be installed from the storage unit to the bearing unit.

The invention discloses a liquid storage type micro-fluidic chip and a working method thereof. The chip comprises a chip body, a sealing film and gum, the sealing film and the back adhesive are respectively bonded on the front surface and the back surface of the chip body; a plurality of solution storage cavities are formed in the chip body, outflow runners at the bottoms of the solution storage cavities are connected with corresponding first runners, sealing partition pieces are arranged on the first runners, the outflow runners and the corresponding first runners are blocked through the sealing partition pieces, and the first runners are communicated with second runners through corresponding gum runners. The whole experiment process does not need to be externally connected with a reagent bottle, the purposes of instant detection, preparation and sample separation of the micro-fluidic chip can be achieved, the detection time is greatly shortened, and the experiment steps are simplified. Waste liquid generated in the experiment process flows into the waste liquid cavity, and cross contamination of a laboratory is avoided. The chip provided by the invention can be used for identifying the species of pathogenic microorganisms.

The invention discloses a plate heat exchanger, which belongs to the field of heat exchange, and comprises a plate body I, a plurality of guide columns fixedly connected to one side of the plate body I, a plate body II movably sleeved outside the guide columns, and a heat exchange sheet positioned between the plate body I and the plate body II, the vertical installation assembly comprises a supporting column fixedly connected to one side of the first plate body, a rotating base rotationally connected to the outer portion of the supporting column in a sleeving mode, two lower side plates symmetrically and fixedly connected to the upper end of the rotating base, two upper side plates fixedly connected to the upper ends of the two lower side plates correspondingly, and guide parts fixedly connected to one sides of the two upper side plates and one sides of the two lower side plates. The heat exchange plate can be vertically inserted between the two upper side plates and the two lower side plates, the process of bending installation of the heat exchange plate is avoided, the mechanical stress effect on the heat exchange plate is remarkably reduced, damage such as deformation, scratches and creases possibly caused in the installation process is reduced, the structural integrity of the heat exchange plate is improved, and the service life of the heat exchange plate is prolonged.

The invention discloses a flow chemistry intelligent experiment platform which comprises a direct-current constant-voltage power supply, a PC, a main control board, an electric energy metering module, a temperature control module, an electromagnetic valve, a stepping motor, a flow chemistry unit and an image sensor. The PC is provided with a webpage operation end, a control instruction is transmitted to the main control board through the gigabit Ethernet, and the main control board adopts a hardware architecture of FPGA and ARM co-processing and can accurately control devices such as an electromagnetic valve and a stepping motor to carry out experiments according to set reaction conditions; and in the reaction process, images acquired by the sensor and experimental data such as temperature, pressure, pH and the like are synchronously transmitted to the PC through the main control board to be displayed, analyzed and stored. The device provides maximum flexibility for the flowing chemical reaction, realizes integrated control of various reaction conditions such as temperature, pressure, pH and flow velocity, has the advantages of reasonable structure, high degree of freedom, good interactive experience and the like, and is suitable for various scenes such as classroom experiment teaching, student exploration experiment, college laboratory scientific research and the like.

The invention relates to the technical field of oral instrument cleaning, and particularly discloses an oral instrument disinfection and cleaning device and a cleaning method.The oral instrument disinfection and cleaning device comprises a cleaning and disinfection box, and a disinfection isolation frame is arranged in the cleaning and disinfection box; the cleaning mechanism comprises an ultrasonic cleaning tank, a circulating pump, two water conveying pipes, a cleaning pipe, a lifting mechanism and two positioning strips, the circulating pump is installed in the middle of the bottom end of the ultrasonic cleaning tank, and the number of the water conveying pipes and the number of the positioning strips are both two; a synchronous belt is driven through a motor, two lifting screws are driven to enable two lifting frames to move upwards, then an ultrasonic cleaning tank is driven to ascend, oral instruments are soaked in cleaning liquid in the ultrasonic cleaning tank, high-frequency vibration of ultrasonic waves can penetrate through small gaps and grooves of the oral instruments, meanwhile, a circulating pump inputs the cleaning liquid into a cleaning pipe and sprays the cleaning liquid out, and the cleaning effect is achieved. The flowing effect of cleaning liquid is enhanced, more thorough cleaning is achieved, and the risk of cross infection is effectively reduced.

The invention discloses a body surface sweat in-situ detection sensor based on composite nanofibers and a preparation method, and relates to the technical field of flexible sensing, the body surface sweat in-situ detection sensor comprises a flexible substrate and a detection electrode; the flexible substrate includes: a hydrophobic layer; the liquid guide layer is arranged on the hydrophobic layer and is provided with a sweat non-wetting area and a first sweat wetting area, and the contact angle of the first sweat wetting area is gradually reduced and is smaller than that of the hydrophobic layer; the liquid collection layer is arranged on the liquid guide layer and is provided with a sweat non-wetting area and a second sweat wetting area, and the contact angle of the second sweat wetting area is smaller than that of the first sweat wetting area; the volatilization layer is arranged on the liquid collection layer and provided with a third sweat wetting area, and the contact angle of the third sweat wetting area is larger than that of the second sweat wetting area and smaller than that of the first sweat wetting area; the detection electrode is arranged in the liquid collection layer and is in contact with the second sweat wetting area. The method has the advantages that the multi-scale structure of the electrospun nanofiber is fully utilized, one-way self-permeation of sweat is achieved, cross contamination of new sweat and old sweat is prevented, and sweat detection accuracy is improved.

The invention discloses a sample adjusting device for a microbiological detection analyzer, and relates to the technical field of microbiological detection analysis, the sample adjusting device comprises a device main body, an inner cavity of the device main body is fixedly connected with a fixing plate, the fixing plate is fixedly connected with a servo motor, an output shaft of the servo motor is fixedly connected with a rotating disc, and the rotating disc is fixedly connected with a rotating shaft of the rotating disc. A crank is rotationally connected to the rotating disc, a loading table is rotationally connected to the end, away from the rotating disc, of the crank, a guide rail is fixedly connected to an inner cavity of the device body, and a first sample tube and a second sample tube are arranged on the loading table; in the process that the test tube moves to the position below the first sample tube and the second sample tube, a piston rod of a piston barrel moves, detection liquid in a liquid storage barrel is dropped into the test tube, meanwhile, the dropping quantity of the detection liquid can be adjusted and controlled, errors caused by different persons in manual operation are avoided, and the detection accuracy is improved. In addition, direct contact between operators and reagents and samples is reduced in the automatic process, and the risks of cross contamination and environmental pollution are avoided.

The utility model belongs to the technical field of electrolyte storage tanks, and particularly relates to an electrolyte storage tank easy to stabilize electrolyte, which comprises a tank body, a stirring mechanism is arranged in the tank body and comprises an outer sleeve, and the upper end of the outer sleeve is rotatably connected with the inner top wall of the tank body through a sealing bearing. According to the storage tank, by arranging the stirring mechanism, the electrolyte which is layered after being placed for a long time is stirred, layering of the electrolyte can be broken, chemical components in the electrolyte are evenly distributed, and therefore the performance and efficiency of the electrolyte are improved, and meanwhile the storage life of the electrolyte can be prolonged; and the mechanism can fully wash the inner wall of the tank body and discharge waste water after cleaning, so that the residual electrolyte on the inner wall of the tank body is reduced, the cross contamination of the tank body in subsequent use is avoided, and the service life of the tank body is prolonged. And therefore, the electrolyte storage tank integrates the functions of storage and self-cleaning.

The present invention discloses a sensor for in-situ detection of sweat on the body surface based on composite nanofibers and a preparation method thereof, which relates to the field of flexible sensing technology, and includes a flexible substrate and a detection electrode; the flexible substrate includes: a hydrophobic layer; a liquid-conducting layer, which is arranged on the hydrophobic layer, and has a sweat non-wetting area and a first sweat wetting area, and the contact angle of the first sweat wetting area gradually decreases and is smaller than the contact angle of the hydrophobic layer; a liquid-collecting layer, which is arranged on the liquid-conducting layer, and has a sweat non-wetting area and a second sweat wetting area, and the contact angle of the second sweat wetting area is smaller than that of the first sweat wetting area; a volatile layer, which is arranged on the liquid-collecting layer, and has a third sweat wetting area, and its contact angle is greater than that of the second sweat wetting area and smaller than that of the first sweat wetting area; the detection electrode is arranged in the liquid-collecting layer and contacts with the second sweat wetting area. The beneficial effect of the present invention is to make full use of the multi-scale structure of electrospun nanofibers, realize unidirectional self-permeation of sweat, prevent cross-contamination of new and old sweat, and improve the accuracy of sweat detection.

The present invention relates to the technical field of electroplating devices, and specifically to an electroplating device and method for surface treatment of metal products, comprising an electroplating pool, wherein a plurality of partitions are arranged inside the electroplating pool, and the plurality of partitions divide the internal space of the electroplating pool into a plurality of electroplating tanks, and a bracket is arranged on the top of the electroplating pool, and the bracket is in the shape of a gate, and a first linear slide distributed along its own length direction is arranged on the top of the bracket, and a vertical plate is arranged at the movable end of the first linear slide, and a second linear slide distributed vertically is arranged on the surface of the vertical plate, and a horizontal plate is arranged at the movable end of the second linear slide; the present invention has an electroplating rack and a blowing part, and when the electroplating rack carries the electroplated parts out of the electroplating liquid, the blowing part can be used to blow air to the surface of the electroplating rack, thereby accelerating the dripping of the electroplating liquid on the surface of the electroplated parts to avoid cross contamination between different electroplating liquids.

The utility model discloses a 96-well plate capable of preventing cross contamination, which belongs to the field of 96-well plates and comprises a well plate and a well plate cover covering the well plate, ninety-six hole grooves distributed in a rectangular array are arranged on the inner side of the well plate, and the well plate cover covers the well plate. The hole plate cover comprises a transparent cover plate, a cover cap which is clamped on the transparent cover plate and is in contact with an opening in the top end of the hole groove, and a fence which sleeves the outer part of the hole plate and is clamped with the bottom of the transparent cover plate. According to the 96-well plate capable of preventing cross contamination, cross contamination of reagents is effectively prevented through the design of the well plate cover and the cap on the well plate cover, the hole grooves distributed in the well plate in a rectangular array mode are matched with the well plate cover capable of being connected in a covering mode, the internal situation can be observed through the transparent cover plate, and leakage of the reagents in each hole groove is avoided through the sealing design of the cap; the enclosure and the buckle structure ensure the firm fixation of the pore plate cover, and further enhance the closeness of the system.

The invention discloses a novel europium-cerium flow battery electrolyte and a preparation method thereof, and belongs to the technical field of flow battery energy storage. The theoretical voltage of the novel europium-cerium flow battery is 1.9 V, and the novel europium-cerium flow battery has higher energy density and power density. According to the synthesis strategy, a chelating agent is added into a solution containing europium or cerium, the molecular size of the formed chelate is large, and cross contamination caused by active ion transmembrane is avoided. The chelating agent can stabilize the reduction state of metal ions and slow down the oxidation reaction between the electrolyte and oxygen. The electrolyte is low in cost and suitable for being used in a neutral environment, europium and cerium are rare earth metals, have rich resource reserves, a complete industrial chain, advanced technical accumulation and policy support of the government in China, are matched with a chelating agent to improve oxidation-reduction kinetics, can be applied to a photovoltaic energy storage system on a large scale, and has a wide application prospect. Wide application prospects are also realized in the aspect of novel power automobiles.

The utility model discloses a liquid circulation module to solve the problems that an existing cell culture device cannot accurately simulate an in-vivo dynamic circulation process, cross contamination occurs in a conventional cell culture experiment process, and an experiment result is inaccurate. The system comprises two liquid storage tanks, two pressure pumps and a cell culture device which is matched with the two liquid storage tanks for use, during use, liquid is driven by the pressure pump to flow, so that the liquid flows from the first liquid storage tank to the second liquid storage tank after passing through the flowmeter, the cell culture device and the one-way valve according to a set flow rate, liquid is quickly supplemented from the second liquid storage tank to the first liquid storage tank after being cultured for a period of time, and the process is repeated, so that the long-term dynamic circulating culture process of cells is realized; the device is simple in overall structure and convenient to use, the in-vivo dynamic circulation process can be accurately simulated in the cell culture process, cross contamination in the conventional cell culture experiment process is avoided, and therefore the accuracy of the experiment result is improved; the whole cell culture process is in a sealed state, so that the pollution problem is avoided.

The invention discloses a high-flux microfluidic strain screening device, and relates to the technical field of microfluidics, the high-flux microfluidic strain screening device comprises a microdroplet generation unit and a microdroplet collection unit, the microdroplet generation unit comprises an inner water phase pipe, an oil phase pipe, an outer water phase pipe and a liquid outlet pipe which are coaxially arranged; the micro-droplet collecting unit comprises a collecting plate, a micro-droplet liquid inlet, a micro-droplet collecting cavity and a waste liquid discharging opening are formed in the collecting plate, a plurality of positioning grooves for capturing micro-droplets are formed in the bottom of the micro-droplet collecting cavity, and an extraction channel penetrating to the bottom surface of the collecting plate is formed in the bottom of each positioning groove; one end of the microdroplet liquid outlet of the liquid outlet pipe is inserted into the microdroplet liquid inlet; in order to solve the problems of low flux, easy cross contamination and false positive screening in single strain separation and culture in the prior art, the invention provides a high-flux microfluidic strain screening device capable of quickly separating, culturing and screening a single strain collected in an environment.

The pesticide spraying device capable of expanding the spraying range comprises a base, a pesticide box is fixedly installed at the top of the base, a rotating rod is rotationally connected into the pesticide box, a rotating disc is fixedly installed on the outer side of a rod body of the rotating rod, a first motor is fixedly installed at the right end of the top of the pesticide box, and a second motor is fixedly installed at the right end of the top of the first motor. And a synchronous belt wheel is fixedly mounted at the output end of the first motor. According to the pesticide spraying device capable of expanding the spraying range, the device can cover a wider crop range through one-time spraying, meanwhile, the device can also be suitable for different types of crops and different terrain environments, pesticide can be accurately sprayed to needed positions, then the usage amount of the pesticide can be reduced, meanwhile, the pesticide applying accuracy is improved, and the pesticide applying efficiency is improved. The pesticide application time can be shortened, the labor cost can be reduced, pesticide can be fully dissolved through stirring, it is ensured that pesticide solutions are evenly mixed, and meanwhile mixing of different pesticides and cross contamination to crops can be avoided through cleaning.

The invention discloses conveyor equipment convenient to clean, and belongs to the technical field of conveyors, the conveyor equipment convenient to clean comprises a conveyor body, an ash scraping mechanism is mounted on the upper surface of the conveyor body, a spraying mechanism is arranged at the bottom of the conveyor body, and a cleaning mechanism is mounted on the inner side of the spraying mechanism; a drying mechanism is installed at the position, located on one side of the cleaning mechanism, of the bottom of the conveyor body, a supporting seat is installed on one side of the conveyor body, an auxiliary belt is rotationally connected to the upper surface of the supporting seat, and two first electric air cylinders are rotationally connected to one side of the supporting seat; a piston rod of the first electric air cylinder is rotationally connected with one side of the bottom of the auxiliary belt. On the basis that materials are conveyed, the conveying belt can be cleaned, and the conveying belt can be dried.

The invention provides a polluted site earthwork intelligent allocation method and management system, and the method comprises the steps: obtaining the information of a polluted site, and determining an excavation region and a temporary storage region; determining an earthwork transportation route based on the position information of the excavation area and the temporary storage area; the excavation area at least comprises a first pollution type soil area and a first clean soil area, the temporary storage area at least comprises a first pollution type soil temporary storage area, and the first clean soil temporary storage area, the first pollution type soil area and the first pollution type soil temporary storage area are at least provided with a first earthwork transportation route; the first clean soil area and the first clean soil temporary storage area are at least provided with a second earthwork transportation route, and the first earthwork transportation route is different from the second earthwork transportation route. According to the intelligent allocation method for the earthwork in the contaminated site, regional division of the contaminated soil and the clean soil in the contaminated site can be realized, different transportation routes can be planned, cross contamination can be effectively prevented, and intelligent route design and execution can be realized.

The utility model discloses a soil heavy metal detection device, and relates to the technical field of soil heavy metal detection. A vibrating sieve plate, two upper guide plates fixedly arranged on the opposite inner walls of the detection box, two crushing rollers rotationally arranged along the horizontal line, a lower guide plate fixedly arranged on the inner walls of the detection box and a drawing collection box are sequentially arranged in the detection box from top to bottom, and a plurality of through sieve holes are uniformly distributed in the top of the sieve plate; the opposite ends of the two upper material guiding plates extend downwards to the positions above the two smashing rollers correspondingly, the two smashing rollers are meshed, the top of the collecting box is provided with an opening, one end of the collecting box penetrates through the detecting box and extends to the outside, and one end of the lower material guiding plate extends downwards to the position above the collecting box. According to the device, impurities in a soil sample can be screened out, soil blocks in the soil sample can be fully scattered, the soil sample attached to the outer wall of the probe can be cleaned, and the detection accuracy of the content of heavy metal in soil is improved.

The invention relates to the technical field of packaging containers, and provides a container sealing device capable of being fixed to the neck of a container, the container sealing device is provided with a cover surrounding structure and a cavity cylinder structure, and is provided with a first positioning stop retaining buckle, a first buckle and a sealing piece, and the outer wall of the sealing piece is provided with a concave chamber structure and a supporting and pressing structure; the tail end of the cavity cylinder structure is provided with a channel structure which can be sealed through a channel sealing piece. The container sealing device can be installed and fixed on a container provided with a container neck with an opening and a main body chamber, the container neck is provided with a second positioning stop retaining buckle, a second buckle and a sharp structure, and the sharp structure of the container neck is located in a concave chamber structure of the container sealing device. The sharp structure can cut the thinned and connected structure between the sealing piece and the inner wall of the cavity cylinder structure, so that materials in the container sealing device are released. In addition, the invention further provides a packaging container and a component of the container sealing device.

The invention relates to the technical field of ultra-clean barrel connectors, and particularly discloses a two-in-one quick connector with liquid pumping and gas inlet functions, which comprises a body, a moving assembly is arranged in the body, and one side of the body is connected with a liquid non-return assembly and a gas non-return assembly respectively; the body comprises a connector located outside the moving assembly, a first connector pipe and a second connector pipe are arranged on one side of the connector, and external threads are arranged below the connector. The moving assembly comprises a pneumatic system located above the connector, one end of the connecting rod is connected with a moving cylinder, and one side of the moving cylinder is provided with a first transposition hole and a second transposition hole. Due to the design of the moving assembly, automatic operation of liquid pumping and air feeding of the ultra-clean barrel is achieved, manpower and manual operation time are saved, and the working efficiency of the connector is improved; due to the design of the liquid non-return assembly and the gas non-return assembly, a good sealing effect can be achieved in the liquid pumping and gas inlet process, and cross contamination is avoided.

The invention relates to the technical field of stirring kettles, in particular to a stirring kettle for producing amino acid water-soluble fertilizer, which comprises a stirring kettle body, a fixed cover is fixedly connected to the stirring kettle body, a connecting pipe is fixedly connected to the bottom end of the fixed cover, and a rotating frame is rotatably connected in the fixed cover. The stirring kettle comprises a rotating frame, a plurality of storage covers are fixedly connected to the rotating frame, stirring mechanisms are rotatably connected to the interiors of the storage covers, flushing mechanisms are rotatably connected to the interiors of the storage covers, water guide driving bases are fixedly connected to the outer walls of one sides of the storage covers, and water guide frames are arranged on the storage covers in a sliding fit mode. By arranging various types of stirrers in the fixed cover, according to different material characteristics and process requirements, the stirring mode is flexibly adjusted, different stirring effects are achieved, the mixing uniformity of materials is improved, the mass transfer rate of the materials is improved, the reaction rate is controlled and the like, and it is ensured that fertilizers are mixed uniformly, the quality is stable, and the production process is efficient.

The invention relates to the technical field of packaging containers of products, and provides a container sealing device which comprises a container sealing device body formed by assembling an inner cover and a control cover, the inner cover is provided with a cover surrounding structure and a barrel surrounding structure which are of an annular barrel-shaped structure and connected together, the cover surrounding structure is provided with a first buckle, and a sealing piece is arranged at the head end of the barrel surrounding structure; a concave chamber structure and a supporting and pressing structure are arranged on the inner wall of the sealing piece; the tail end of the control cover is closed or is provided with a channel structure, the inner wall of the side wall of the control cover is provided with a second buckle, the inner wall of the tail end of the control cover is provided with a cavity cylinder or an arc-sheet-shaped structure, and the cavity cylinder or the arc-sheet-shaped structure is provided with a sharp structure and a rib sheet; the sharp structure is located in the concave chamber structure of the barrel surrounding structure, and the sharp structure can slide, cut, support and press from the concave chamber structure of the inner cover to open the sealing piece, so that materials in the container sealing device are released. In addition, the invention further provides a component of the container sealing device, a packaging container and application.

The utility model provides a three-door interlocking and timer linkage device, which comprises a self-cleaning area three-room door, an interlocking and timer control circuit, the self-cleaning area three-room door comprises an unpacking room door, an airlock room door and a clean corridor door, a timer is arranged in a wall for separating an unpacking room and an airlock room, the front and back surfaces of the timer are provided with display screens, the two surfaces are visible, and the interlocking and timer control circuit is connected with the interlocking and timer control circuit. When materials enter the airlock room door and the clean corridor door and are closed at the same time, countdown is started after an instruction is received, the airlock room door or the clean corridor door can be opened after countdown is finished, interlocking of the three doors is achieved, personnel cannot open the doors at will to enter a self-cleaning area of a workshop, the two doors cannot be opened at the same time, cross contamination of the materials is effectively avoided, and the service life of the airlock room door and the clean corridor door is prolonged. And the added timer is interlocked and linked with the three doors, so that materials can be self-cleaned for a certain time in an environment in which the airlock is completely closed, the requirement of GMP (Good Manufacturing Practice) is met, the manual operation steps are reduced, and the production efficiency is improved.

The cell culture device comprises a shell, the top in the shell is divided into a plurality of fan-shaped cavities through a plurality of fixedly-connected partition plates, rectangular openings are formed in the bottoms of the partition plates, movable plates are slidably mounted in the rectangular openings, and the bottom ends of the movable plates slidably abut against placement parts; the placing part is rotationally installed in the shell, the center bottom end of the placing part is fixedly connected with the transmission assembly, the transmission assembly is rotationally installed in the cylindrical cavity, the cylindrical cavity is formed in the bottom in the shell in a hollow mode, the transmission assembly is fixedly connected with the servo motor, and the servo motor is fixedly installed in the cylindrical cavity; an output shaft of the servo motor is in transmission connection with a transmission shaft through a transmission belt, the transmission shaft is rotationally installed on one side in the shell, the side, away from the servo motor, of the transmission shaft is in transmission connection with a cleaning rotating shaft through a transmission belt, the cleaning rotating shaft is rotationally installed in the fan-shaped cavity, and one side of the cleaning rotating shaft is provided with a first electric telescopic rod fixedly connected with the inner wall of the fan-shaped cavity. The end of the first electric telescopic rod is fixedly connected with a mounting plate.

The invention discloses a high-purity dimethyl carbonate and propylene glycol synchronous refining adjusting system and method, and relates to the technical field of high-purity dimethyl carbonate and propylene glycol synchronous refining, and the method comprises the following steps: at the beginning of a process, firstly adopting a reflux ratio regulation frequency in an initial distillation stage to quickly remove low-boiling-point impurities and establish heat balance in a tower; and when a switching process between the initial distillation stage and the refining stable stage is entered, heat balance information of the system is collected in real time. By introducing the real-time monitoring and support vector machine model, the heat balance state change is intelligently identified, the reflux ratio regulation frequency is dynamically adjusted, the gas-liquid mass transfer balance is ensured, impurity entrainment is avoided, the product purity is improved, the burden of downstream separation equipment is relieved, the energy consumption and the cost are reduced, and the heat balance of the system is quickly recovered; the production efficiency and the product reliability are remarkably improved, the whole batch of products are prevented from being scrapped, and an efficient and high-quality synchronous refining process is realized.

A container sealing device is composed of a cover component and a release component, can be installed on the neck of a container and has a function of transversely releasing materials contained in the container, and the cover component is provided with a cover surrounding structure, a cavity cylinder structure, a channel structure, a first buckle, a third buckle, a first positioning stop retaining buckle, a sealing piece, a supporting and pressing structure and an L-shaped concave chamber structure. The releasing component is of a cylindrical structure and is provided with a fourth buckle, a second positioning stop retaining buckle, a cutting structure and a first retaining buckle; the cover component and the release component rotate relative to each other, so that the cutting structure of the release component starts to slide from the concave chamber structure, a transverse cutting effect is generated on the thinning connecting structure of the cavity cylinder structure to a preset position, and the notch of the sealing piece is pushed to the outside of the cavity cylinder structure; the materials in the container sealing device are released into the container; the invention further provides a packaging container of the container sealing device, a packaging composition, an assembling method of the container sealing device and application of the container sealing device.

The invention discloses a process for extracting copper, lead and precious metals by a vacuum distillation method. The process for extracting the copper, lead and precious metals by the vacuum distillation method comprises the following steps: step 1, preparing and pretreating raw materials; 2, plasma pretreatment; step 3, carrying out segmented heating and rotary distillation; step 4, multi-stage condensation; 5, online monitoring is carried out; according to the technology for extracting the copper-containing, lead-containing and precious metal through the vacuum distillation method, metal steam with different boiling points can be accurately separated at different temperature sections through a multi-stage condensation system, follow-up purification steps such as cross contamination, multi-stage condensation and electrolytic refining between the metals are avoided, the purity of the metals can be remarkably improved, and the purity of the copper-containing, lead-containing and precious metal is improved. The final product is ensured to meet the high-quality standard; the boiling point of metal in a vacuum environment is reduced, energy consumption required by heating is reduced, the rotary distiller is used, raw materials are continuously turned over in the heating process, uniform heating is guaranteed, the evaporation efficiency is improved, and residues are reduced.

The invention relates to the technical field of atmospheric pollution monitoring, and discloses high-precision atmospheric pollutant monitoring sensor equipment, which comprises a chimney main body, a switching assembly for pollutant monitoring is arranged on the chimney main body, and a cleaning assembly for cleaning an atmospheric pollutant sampling pipe is arranged on the chimney main body; when the chimney main body does not exhaust gas, the first gas collecting pipe is used for collecting ambient air without emissions for detection, and the ambient air can be used as a reference for subsequent data comparison; when the chimney main body exhausts flue gas, the second gas collecting pipe is used for collecting samples containing emissions; therefore, the atmospheric pollutant sampling pipe can be switched according to whether flue gas is discharged from the chimney main body or not, cross contamination of emissions and ambient air not containing the emissions is avoided, the accuracy of a detection result is ensured, and meanwhile, when the sampling pipe is switched, the unused sampling pipe is stored in the monitoring box, so that the sampling pipe is convenient to use. Furthermore, the unused sampling pipe cannot be polluted by dust and impurities, and the service life of the equipment is prolonged.

A container sealing device installed on the neck of a container, a component of the container sealing device and a packaging container are composed of a cover component and a release component, the cover component is provided with a cover surrounding structure and a cavity cylinder structure, and the cover component is provided with a first buckle, a first positioning stop blocking buckle, a sealing piece, a supporting and pressing structure and an L-shaped concave chamber structure. The releasing component is provided with a thread or a clamping and blocking structure, a second buckle, a second positioning and stopping blocking buckle and a cutting structure. The cover component and the release component rotate mutually, so that the cutting structure of the release component starts to slide from the concave chamber structure, the transverse cutting effect is generated on the thinning connecting structure of the cavity cylinder structure to a preset position, the notch of the sealing piece is pushed to the outside of the cavity cylinder structure, and materials in the container sealing device are released into a container. The invention further provides a packaging container of the container sealing device, a packaging composition, an assembling method of the container sealing device and application of the container sealing device.

The invention provides multi-material powder bed additive manufacturing equipment and a product preparation method thereof, and belongs to the technical field of laser machining, the multi-material powder bed additive manufacturing equipment comprises a powder bed, a laser scanning galvanometer is used for melting powder on a preset track to form a printed area, and a windward side and a leeward side are formed on the contour edge of the printed area; the powder spreading device is positioned above the powder bed and comprises at least two powder falling devices for storing different powders; the powder spreading scraper is located on one side of one powder falling device, one side of the powder spreading scraper is a scraper back face, and the other side of the powder spreading scraper is a powder scraping face; one of the two powder suction devices is arranged on the same side as the knife back face, the other powder suction device is arranged on the same side as the powder scraping face, and residual powder on the windward face and the leeward face is correspondingly sucked away through the two powder suction devices. According to the invention, cross contamination among various materials is avoided, and the performance of a formed product is improved.