24results about How to "Avoid contamination risk" patented technology

The utility model belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing, which comprises an external powder blocking module and a dynamic sealing module, the external powder blocking module consists of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate, the first powder blocking plate is fixed at the top of a plasma gun body to form an arc-shaped shielding surface, and the dynamic sealing module is fixed at the top of the plasma gun body. The powder retaining ring coaxially sleeves the positive electrode of the plasma gun body and forms an annular gap type powder blocking structure with the insulating powder retaining plate; the dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the utility model has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

The utility model relates to pharmaceutical equipment technical field especially relates to a kind of powder accumulation prevention wall cleaning device of spray drying tower.It is a kind of powder accumulation prevention wall cleaning device of spray drying tower, including main part, limiting screw rod, locking knob, sliding sleeve, first pivot, folding rod, brush and hinged rod, main part bottom fixed connection has limiting screw rod, limiting screw rod is threadedly connected with locking knob, locking knob bottom periphery fixed connection sliding sleeve, limiting screw rod lower end rotationally connects first pivot, first pivot periphery is cross-distributed rotationally connected with folding rod, folding rod outer end is all fixedly connected with brush, and each folding rod outer side top and sliding sleeve lower periphery between rotationally connected with hinged rod.The utility model is moved up and down along limiting screw rod by rotating locking knob and driving sliding sleeve, realizes the unfolding and folding of folding rod, improves the operation convenience and maintenance efficiency of equipment, reaches the effect that it is easy to operate and efficiently to complete drying tower inner wall cleaning.

The utility model relates to the field of docking platform discloses automatic docking platform mechanism, including frame and install docking platform bottom plate on the frame still include: mechanical arm, install in docking platform bottom plate, and the execution end of mechanical arm is equipped with the electric clamp jaw for grabbing material, placing rack, install in one side of docking platform bottom plate, be used for receiving and temporary storage material disc, AGV dolly, movable to the below of placing rack, in the utility model, through the accurate butt joint of lifting platform and placing rack, the automatic grabbing of mechanical arm electric clamp jaw, replace manual transfer material disc's operation, avoid the lens pollution or damage risk caused by manual contact, reduce manpower cost investment simultaneously, and the mechanical fixing of the orientation limit and positioning mechanism of U type opening structure, form multiple deviation prevention, prevent mistaken operation mechanism, ensure that material disc is from the position precision of transportation to feeding.

The utility model discloses a river water condenser and ship, this river water condenser includes the casing, is equipped with circulating water import and circulating water export on the casing, and circulating water import and circulating water export all are linked to the shell inner chamber, and the casing both ends are connected with front end cover and tail end cover respectively, and the water inlet and water outlet are in parallelly arranged on the front end cover, and the cooling pipe is equipped in the casing, and the cooling pipe includes cooling inlet pipe and cooling outlet pipe, and the cooling inlet pipe is linked to the water inlet, and the cooling outlet pipe is linked to the water outlet, and the tail end cover is equipped with the self -cleaning mechanism, adopts the river water condenser of the utility model, and heat exchange effect is good, and the pipeline is few and is long in service life.

The utility model relates to dental equipment technical field especially is a kind of dental micro power device connector, including grinding teeth machine body, grinding teeth machine body surface is equipped with touch screen, the other side of grinding teeth machine body is fixedly provided with inner water tank, grinding teeth machine body surface is fixedly provided with inner water flow valve, and inner water flow valve is connected inner water tank and grinding teeth machine head by inner connection distilled water pipeline, one side of inner water tank is fixedly provided with fixed plate, fixed plate is fixedly provided with hanger, hanger surface is hung with disposable sterilization saline bottle, and disposable sterilization saline bottle is fixed with external tube plug by external sterilization physiological saline pipeline, independently connected distilled water pipeline and external sterilization physiological saline double waterway system of innovative design are realized seamless conversion of different treatment modes by one-key type switching valve, greatly improve clinical operation efficiency, avoid the cumbersome operation of traditional equipment needing manual replacement pipeline.

The application relates to a purging device for a liquid preparation system and relates to the technical field of medicine liquid preparation. In order to solve the problem that a traditional purging device cannot completely purge, the purging device comprises a conveying pipeline, the inlet end of the conveying pipeline is provided with a compressed air supply source, the outlet end of the compressed air supply source is sequentially and serially provided with a pressure reducing valve and an electric heater along the conveying pipeline, a plurality of heating modules are arranged in the electric heater, the plurality of heating modules are vertically stacked along the height direction of the electric heater, a heating channel is formed in the electric heater from bottom to top, and a temperature gradient from low to high is formed when the compressed air flows through the heating channel. The application has the effects of effectively stripping the residual moisture on the surface of the system, improving the removal rate of the residual moisture and solving the microbial pollution risk caused by incomplete purging.

The utility model provides a kind of wafer temperature uniform control and automatic transfer integrated device in hot plate air extraction process, including disc-shaped cavity main body and automatic wafer transfer assembly, cavity main body top is plane structure, hot plate upper surface is perpendicular to the central axis of cavity main body, the sealing disc is coaxially arranged with cavity main body;It further includes air inlet and air outlet, air inlet is circularly opened in the sidewall top of the cavity main body;Air outlet is opened in the top surface center of the cavity main body.The utility model determines suitable cavity wall surface material by optimizing cavity structure, reasonably selecting air inlet and air outlet position, solves the problem of wafer temperature uneven in prior art, and realizes wafer automatic taking through intelligent automatic wafer transfer assembly structure under the form of not changing cavity structure, improves the quality and efficiency of semiconductor wafer manufacturing.

This invention provides a method for controlling Spartina alterniflora and promoting natural mangrove restoration based on rolling mulching and in-situ mud slurry, belonging to the field of ecological control technology. The method involves mechanically rolling Spartina alterniflora to flatten most of it and press it into the tidal flat soil. Then, a biodegradable mulch film is laid on top, and mud slurry is extracted and applied to form a mud slurry cover layer. A mangrove seed interception and planting device is then installed on the mud slurry cover layer to prevent mangrove seeds from growing naturally, thereby reducing the cost of Spartina alterniflora control and improving the efficiency of Spartina alterniflora control.

This application relates to the field of waste recycling technology, specifically disclosing an enrichment liquid extraction system and method. The system includes: a mother liquor tank, a return liquid tank, a filter press, a reaction vessel, a resin tank, and a controller. The mother liquor tank is connected to the filter press. The reaction vessel is equipped with: a reaction liquid port, an auxiliary material port, a resin port, and a discharge port. The reaction liquid port is connected to the filter press. The auxiliary material port valve is connected to the cleaning liquid port, the desorption liquid port, and the neutralization liquid port. The resin port is connected to the resin tank. The discharge port is connected to the waste liquid port, the enrichment liquid port, and the return liquid tank via valves. Valves are provided at the reaction liquid port, the auxiliary material port, and the discharge port. By controlling the opening and closing of each valve through the controller, the feeding, addition of auxiliary materials, and liquid discharge of the reaction vessel can be controlled, realizing automatic control of material transfer during the enrichment liquid extraction process. This avoids the safety and pollution risks associated with manual feeding and material transfer, and effectively reduces the labor intensity of workers while improving production efficiency.

This invention discloses a pesticide residue detection sample oscillation extraction device with solid-liquid separation function, relating to the field of detection equipment. When extracting pesticide residue samples using this device, the sample to be tested is placed in a combined testing cylinder, and a clamping and positioning component clamps the lower clamping plate. A motor drives a rotating plate, a placement cylinder, and the combined testing cylinder to rotate via a telescopic cylinder. Because the lower clamping plate is wavy and annular, the rotating plate vibrates up and down, and the combined testing cylinder vibrates along with the plate, ensuring that the substances in the sample are fully dissolved in the solvent within the combined testing cylinder. When solid-liquid separation is required, the clamping and positioning component is moved to another slot, clamping the upper clamping plate. Because the upper clamping plate is circular and annular, the rotating plate drives the combined testing cylinder to rotate at high speed, achieving solid-liquid separation through high-speed centrifugal force.

This utility model relates to a multi-pore tube rack, comprising: a base; a first tube rack disposed above the base, with a support column fixed between the base and the first tube rack, the first tube rack having multiple holes one and multiple holes two for accommodating 1.5ml microcentrifuge tubes and 15ml centrifuge tubes respectively; a second tube rack rotatably disposed outside the support column, with a support sleeve fixed to the bottom of the second tube rack, the second tube rack having a hole three for accommodating 50ml centrifuge tubes, and a hole four; and an elastic pressing structure. This multi-pore tube rack, due to its design of a rotatable, outwardly expanding and inwardly retractable second tube rack, can provide additional 50ml centrifuge tube placement without increasing the length and width of the first tube rack, making the multi-pore tube rack streamlined and capable of accommodating 50ml, 15ml, and 1.5ml tubes. Furthermore, it eliminates the need for frequent tube rack replacements, reducing the transfer of items inside and outside the clean bench and mitigating the risk of contamination.

The utility model discloses an oocyte collector belongs to medical appliance technical field, including protection shell and the collection pipe of activity connection in the protection shell, the inner wall fixed with antiskid air bag of protection shell, the upper half of collection pipe inserts and has the rubber plug of glue, and the surface fixed with adjusting box of glue plug, rotatingly connected with screw rod in adjusting box, the outer wall screw connection has adjusting block of screw rod, the upper and lower both ends fixed with connecting pipe and discharge pipe of adjusting box, the adjusting block is opened and has the flow -guiding hole of being linked with the communication of connecting pipe and discharge pipe, and the connecting pipe is inserted with suction pipe, the rubber plug is provided with negative pressure pipe, and one end fixed with suction hood of negative pressure pipe is located in the inside of collection pipe, and the suction hood is provided with two baffles in parallel. This oocyte collector, solve the problem of pollution and mistake of existing collector pipe after processing easy to cause, improve the accuracy and safety of oocyte collection.

This invention relates to the field of gene technology, specifically disclosing a method for enhancing the secretion of secondary metabolites based on the regulation of quorum sensing signal molecules. This method activates the expression of bacterial secondary metabolite synthesis gene clusters through bacterial-fungal interaction, comprising the following steps: (a) co-culturing bacteria and fungi in contact or non-contact mode; (b) during co-culturing, the fungi secrete the quorum sensing signal molecule farnesol; (c) the bacteria sense farnesol through a two-component system, activating the expression of secondary metabolite synthesis genes. This invention effectively overcomes the gene silencing problem caused by metabolic load or lack of regulation in natural strains by activating the originally trace expression of secondary metabolite synthesis gene clusters in bacteria using the fungal-derived quorum sensing signal molecule farnesol.

The utility model discloses a kind of positive electrode material storage device and system, belong to lithium ion battery positive electrode material manufacturing field.The device includes warehouse body, the stirring device of being set in warehouse body, temperature measuring device and the circulating fluid cooling device of being set on the outer wall of warehouse body.The system includes the fixed temporary storage bin connected with production line and the mobile bin that can be handled by fork truck.When high-temperature material enters warehouse body, through the synergistic effect of stirring device, cooling device and temperature measuring device, the temperature of material can be controlled, effectively solve the technical problem that carbonization combustion of lithium iron phosphate positive electrode material is prone to occur due to heat accumulation, improve production safety.

This utility model discloses an automatic doping device for monocrystalline silicon, belonging to the field of doping technology. It includes a rodless cylinder, which comprises a support base and a frame. The frame is horizontally movable and mounted on the support base. It also includes an extension tube, a doping spoon, a sliding sleeve, and a linkage component. The sliding sleeve is slidably connected to the periphery of the extension tube, and its periphery is rotatably connected to one side of the frame. The bottom of the support base is fixedly connected to the periphery of the extension tube. The doping spoon is rotatably mounted on the extension tube. The linkage component is mounted on the extension tube and is used to make the doping spoon and the sliding sleeve rotate synchronously. This automatic doping device for monocrystalline silicon drives the sliding sleeve to move through the rodless cylinder, and drives the doping spoon and the sliding sleeve to move synchronously through the linkage component, causing them to rotate at a uniform speed while moving horizontally, thus performing automatic doping. This not only reduces labor intensity but also makes the doping effect more uniform, solving the problems of high manual labor intensity and low doping quality in existing monocrystalline silicon doping devices.

The utility model relates to automatic control technical field especially, and it is slow -release fertilizer batch packaging equipment based on automation integration technology is provided.The utility model provides slow -release fertilizer batch packaging equipment based on automation integration technology, including support, loading bucket and material conveying pipe etc., and the loading bucket is fixedly connected on the support upside, and the loading bucket top is provided with the feed port that is symmetrical left and right.The utility model realizes the accurate control to first motor, solenoid valve and first hot melt block etc. part through integrated controller, and the automation level is improved obviously, and the controller adjusts solenoid valve opening degree, and the slow -release fertilizer flow rate and the feeding amount are controlled accurately, and the measurement precision is greatly improved, adopts first hot melt block and second hot melt block linkage design, and completes back seal, bottom seal and top seal under the controller control, guarantees every fertilizer package seal firm, solves the problem that traditional equipment seal is not airtight or appearance is not good, improves overall packaging quality and efficiency.

This invention discloses a small-diameter motor-driven dual-mode intelligent honing tool integrated into a machining center, along with its operation method and application, belonging to the field of precision machining. The honing tool includes a tool body, a honing stone assembly, a motor-driven feed mechanism, a conductive slip ring, a protective cover, and a motor control system. The motor-driven feed mechanism is integrated within the tool body, driving the axial movement of the pusher rod through a reduction gearbox and a lead screw pair, and using the conical surface to drive the radial expansion and contraction of the honing stone. The motor control system employs dual-mode intelligent control: quantitative rough honing based on encoder position feedback, and constant-pressure fine honing based on a motor current-honing force model, thus achieving precise closed-loop control of the honing process. The conductive slip ring ensures power supply for rotation, and the protective cover provides anti-rotation and sealing. This honing tool can complete drilling, reaming, and honing composite machining in a single setup, solving the problems of low pressure control accuracy and slow response of traditional hydraulic tools, and is particularly suitable for ultra-high precision parts such as electro-hydraulic servo valve sleeves.

This invention relates to a low-cost, long-life alkaline refractory material for non-ferrous metal smelting, and pertains to the technical field of non-ferrous metal smelting. The low-cost, long-life alkaline refractory material for non-ferrous smelting of this invention, by mass percentage, comprises a basic alkaline component, functional additives, and a binder. The basic alkaline component contains 40%–60% calcined dolomite and 20%–40% sintered magnesia. The functional additives contain 3%–8% silica fume, 5%–15% bauxite clinker, 2%–6% silicon carbide, and 1%–5% calcium fluoride. The calcined dolomite is a decomposition product of CaMg(CO3)2 calcined at 1000℃–1200℃. The alkaline refractory material of this invention has low cost (30%–50% lower than traditional magnesia-chrome bricks) and significantly improved service life in the high-temperature corrosive environment of copper, lead, and zinc smelting. It is suitable for furnace linings, chutes, flues, and other parts in non-ferrous smelting, and has significant industrial application value.

The application discloses a coil pipe type fermentation device and a continuous solid-state fermentation system, relates to the technical field of solid-state fermentation, and can realize disassembly, offline high-temperature and high-pressure sterilization, and complete sealing of the whole device, so that bacterial contamination is completely avoided from sterilization and fermentation environment of the device, pure culture of strains is realized, and the quality and yield of fermentation products are improved. Meanwhile, the sterilization mode is flexible, supports two modes of assembly after offline sterilization and online sterilization after assembly, is suitable for different use scenes, can effectively avoid bacterial contamination, and realizes pure culture of strains. The coil pipe and the flexible stirring assembly are matched, the device volume is greatly reduced, the space utilization is improved, and the whole link of test, pilot test and production is adapted. Through multi-stage coil pipe series connection design and independent temperature control and parameter regulation of each coil pipe, fermentation conditions can be accurately controlled according to different fermentation stages. Finally, continuous, automatic and accurate operation of solid-state fermentation is realized, and fermentation production efficiency and product stability are improved.

This invention discloses a dual-roller radial continuous rotary peristaltic pump, comprising a drive mechanism, a rotation mechanism, a hose mechanism, and a compression mechanism on a mounting plate. The hose mechanism includes an elastic hose, a cam, and a support plate. The support plate is connected to a bearing seat and the cam, respectively. The bearing seat is connected to the mounting plate, and the elastic hose radially surrounds the outer periphery of the cam. The compression mechanism includes rollers and a guide assembly. The guide assembly is connected to the rollers and the rotation mechanism, respectively. The rollers are symmetrically arranged on both sides of the elastic hose. The rotation mechanism is connected to the drive mechanism, which drives the rotation mechanism to rotate. The rotation mechanism drives the guide assembly to rotate, and the rollers mounted on the guide assembly rotate radially and compress the elastic hose, achieving continuous fluid metering and delivery. This invention has advantages such as compact structure, high reliability, and low wear on the inner wall of the hose, solving the problem of fluid contamination caused by severe wear on the inner wall of the hose and the generation of a large number of particles in existing peristaltic pumps.

This utility model belongs to the technical field of chromatographic analysis. It discloses a liquefied gas sampling device for chromatographic analysis, including a sample inlet, a liquid injection valve, a transparent quantitative loop, a vaporization valve, a sample vaporization bottle, a sample outlet valve, and a sample outlet. It adopts a four-valve group pipeline collaborative structure. The layout of the liquid injection valve, purge valve, vaporization valve, and outlet valve forms a complete cleaning and sampling closed loop. During cleaning, by reasonably switching the valve state, residual impurities in the pipeline can be quickly discharged. This avoids the cumbersome operation and contamination risk caused by the separation of the cleaning loop and sampling loop in traditional devices. At the same time, the clear division of the valves makes the process of "cleaning-sampling-vaporization-detection" smoother, reduces manual operation steps, and lowers the probability of sample distortion due to operational errors.

This invention discloses a PHA water-based water-blocking coated pulp molded seedling pot containing inorganic fillers and blended polymers, and its preparation method, belonging to the technical fields of seedling containers, pulp molding, and water-based water-blocking coatings. This invention uses polyhydroxyalkanoates combined with sheet-like inorganic fillers to construct a dense water-based barrier layer and innovatively designs a sidewall drainage channel connecting to the bottom. Through a differentiated coating structure, this invention breaks the deadlock between moisture softening during the seedling stage and limited root penetration after transplanting, achieving a precise balance between excellent wet strength and free root growth. This solution eliminates fluorine-containing additives, ensuring the product's biodegradability throughout its entire life cycle.