219results about How to "Smooth inner wall" patented technology

The invention discloses a polyvinyl chloride composition and a transparent pipe thereof. The polyvinyl chloride composition consists of the following components in part by weight: 100 parts of PVC resin, 1.0 to 5.0 parts of heat stabilizer, 0.2 to 2 parts of lubricating additive, 1 to 3 parts of processing modification aid, 2 to 5 parts of impact modifier, 0.01 to 0.08 part of decolorizing agent, 0.2 to 0.6 part of age resister and 0 to 10 parts of plasticizer. The polyvinyl chloride composition is subjected to high-speed hot mixing and low-speed cold mixing, and then is extruded to prepare the polyvinyl chloride transparent pipe; and the pipe is homogenous and transparent, has smooth inner wall, is not easy to scale, can be sleeved outside a pipeline for delivering important or dangerous chemicals, has monitoring and protecting functions, has good ageing resistance, and can be used for outdoor occasions. The preparation method for the polyvinyl chloride transparent pipe is simple, convenient and quick, does not require special tools and professional staff, and is favorable for large-scale industrial production.

The present invention discloses a method of cryogenic surface activation direct bonding for preparation of a quartz glass capillary tube. According to the method, a wet chemical method is used to activate a quartz glass surface, and the manner of direct bonding of a stack of multiple layers of glass is applied, so as to prepare the quartz glass capillary tube at a lower temperature with a proper pressure. A steel needle of a specific size is added to a model and used to define a size and location of the capillary tube. The minimum diameter of the capillary tube prepared can reach as small as 200 micrometers ,and the bonding strength can reach 5 MPa. According to the method, the operation of cryogenic surface activation bonding is simple, the requirement on the glass sheet surface roughness is low, and no clean room or expensive ultra-high vacuum plasma treatment device is required. The method overcomes the problems of the pipe collapse, the device superficial devitrification and the inner wall roughness that may be caused by the conventionally prepared capillary tubes. The capillary tube produced has the smooth inner wall, increases the viewable region of the sample in the capillary tube, and dramatically improves chip performance.

The invention discloses a method for producing micro-needle array templates based on a laser etching technology as well as products and application thereof. The method comprises the following steps: (1) curing and cooling PDMS and a curing agent to obtain a PDMS substrate; (2) designing a laser etching mask plate pattern and enabling the pattern to be a concentric circle array; and (3) placing the PDMS substrate in an engraving area of a laser engraving machine and setting condition parameters of laser processing technology, subsequently carrying out laser treatment on the PDMS substrate with reference to the laser etching mask plate pattern so as to obtain the PDMS substrate etched by laser, wherein the PDMS substrate is the micro-needle array template. According to the method, the key laser etching process conditions are improved, so that the problems that the micro-needle array templates are complex in production process, high in cost and poor in structural design, and large-scale production and application of the micro-needle array templates are difficult can be effectively solved.

The invention discloses a novel injection zipper cloth strap comprising a central line (5) at the edge of the cloth strap, a group of warp (3) and continuous wept (2). Continuous and alternately-arranged small holes (4) are arranged in a joint surface zone of the cloth strap and the injection zipper teeth and formed by setting the structural tissue of the warp of the cloth strap through the mutual influence of tension between the warp and the wept while braiding. The holes in the injection zipper cloth strap are formed without special tools, special procedures or special materials, and the warp and the wept of the cloth strap are kept to be integral with uninfluenced appearance and strength. The invention has the advantages of convenient and simple production and can enhance the binding force between the zipper cloth strap and the zipper teeth, and the like.

The invention relates to the technical field of manufacturing of thermoplastic composite pipelines, in particular to a large-caliber thermoplastic composite long-distance transportation pipe manufactured through a 3D printing forming technology and a manufacturing method and device of the large-caliber thermoplastic composite long-distance transportation pipe. The large-caliber thermoplastic composite long-distance transportation pipe structurally and sequentially comprises a lining layer, a fiber reinforced layer and an outer protective layer from inside to outside. The length of the thermoplastic composite long-distance transportation pipe is 8-10 m, the pipe diameter of the thermoplastic composite long-distance transportation pipe is 1000-1500 mm, the lining layer is 10-50 mm thick, the reinforced layer is 50-200 mm thick and the outer protective layer is 10-50 mm thick. The large-caliber thermoplastic composite long-distance transportation pipe has the outstanding advantages of being light in weight, resistant to high temperature, resistant to corrosion, good in flexibility and air impermeability, high in internal and external pressure rating, convenient to install and the like. Because of the smooth inner wall, the large caliber and the high internal and external pressure rating, the large-caliber thermoplastic composite long-distance transportation pipe can obtain a higher fluid speed and a higher fluid flow and is particularly suitable for being applied on the aspect of long-distance oil and gas transportation pipelines.

The invention provides a processing process of a large-diameter anti-static fiber glass epoxy plastic pipeline. The process is characterized in that a carbon fiber felt is uniformly wound on a pipeline die, so that the carbon fiber felt is flatly coated on the outer wall of the pipeline die; after the carbon fiber felt is immersed by epoxy resin, fiber glass high-strength yarns and carbon fiber yarns are spirally wound on the pipeline die, and an anti-static high-strength fiber glass epoxy plastic pipeline produced by high-temperature cure heating after the winding is completed; and in the processing process, the carbon fiber inner felt, the high-strength carbon fiber, the fiber glass and imported epoxy resin are used as raw materials, and wounding formation, steam heating by stages and high-temperature inner die curing formation are adopted. The process comprises the following specific steps: preparing materials; winding the carbon fiber felt; adding carbon fibers; heating with steam by stages; curing and forming; and processing and finishing, thus obtaining a finished product pipeline. The pipeline provided by the invention has the advantages that the anti-static performance, the physical strength index of the material and the anti-corrosion index are not reduced at an environmental temperature of minus 40-120 DEG C, and the anti-static, anti-aging and anti-fatigue service life is not lower than 30 years under the condition that the pipeline is exposed in the sea.

The invention discloses a flame-retardant antistatic polyethylene pipe and a making method thereof. The pipe comprises the following raw materials by weight: 40%-60% of high density polyethylene (HDPE), 10%-20% of zinc borate, 20%-40% of special nanometer conductive carbon black, 1%-5% of a coupling agent, and 1%-5% of auxiliary agents. The flame-retardant antistatic polyethylene pipe provided by the invention has good antistatic and flame-retardant synergistic effect, excellent antistatic properties and flame retardance, light weight, soft texture, good toughness, coilability, corrosion resistance, resistance to erosion of various chemical media, smooth inner wall, and small resistance. Difficult to scale in use, the pipe has better wear resistance than rubber tubes and pure polyethylene pipes, and has simple ingredients and is easy to prepare. The pipe provided by the invention can completely replace steel pipes to be widely used in drainage, water supply, air compression and gas drainage, and has the advantages of no toxicity and sanitation, light weight, and convenient construction.

The invention relates to a woven artificial trachea and a preparation method thereof, the woven artificial trachea comprises a tube blank and elastic filaments, the tube wall structure of the tube blank is a two-layer woven structure which comprises an inner wall structure and an outer wall structure, a spiral cavity is formed between the inner wall and the outer wall by using a tying and a separating organizational structure at an interval along the axial direction of the tube blank, and then the elastic filaments are inserted into the spiral cavity; and the preparation comprises the following steps: adopting multifilaments and/or single filaments as raw materials, adopting a double-layer tubular organization constituted by a base organization with not more than 6 warp threads according to different motion rules in organization cycles, using the tying and the separating organization at the interval along the axial direction, weaving the tube blank which forms the spiral cavity between the inner wall and the outer wall and penetrating the elastic filaments into the spiral cavity. The woven artificial trachea can improve the radial support performance of the woven artificial trachea, increase the closeness, lead the post-finishing process step to be simple, lead the inner wall to be smooth and be conductive to discharge wastes in the trachea; and the preparation method is simple and applicable to industrial production.

The invention relates to a tissue engineering vessel and a preparation method and an application thereof. The tissue engineering vessel uses a tubular gelatin/polycaprolactone electricity texture membrane as a support, and smooth muscle cells are evenly distributed in the support. The preparation method includes: a) spreading disinfected gelatin/polycaprolactone materials in a culture dish; b) collecting umbilical artery smooth muscle cells, evenly inoculating the umbilical artery smooth muscle cells on the surface of the gelatin/polycaprolactone electricity texture membrane to culture over the night, and forming a cell material composite electricity texture membrane; and c) twisting the cell material composite electricity texture membrane on a polyvinyl chloride (PVC) tube for culturing, and finally forming the tubular tissue engineering vessel. Cells of the tissue engineering vessel prepared by the method are evenly distributed, simultaneously the tissue engineering vessel has the advantages of being good in elasticity, moderate in hardness and compact in tissue structure, having smooth inner walls and abundant collagenous fibers, and being clear in self tissue boundary and the like. The characteristics of the tissue engineering vessel are close to that of living body vessels.

The invention discloses an X-ray phase imaging device comprising an X-ray photon source (1), an optical device (2) and an X-ray detector (4) which are sequentially arrayed. An X ray emitted by the X-ray photon source (1) is transmitted from one end of the optical device (2) to the other end of the optical device (2) to form a micro focal spot (5), and after the X ray passes through an imaged sample (3), an image is formed on the X-ray detector (4), and the optical device (2) is a single capillary, the outlet diameter is in the range of 1mum to 30mum. The imaging device can form a smaller micro focal spot in order to increase the spatial resolution of X-ray phase image, the X-ray phase image is clearer, and the X-ray phase imaging device has low cost and is convenient to popularize.

The composition of said antistatic fire-resisting polyethylene material is formed from (by weight portion) 100 portions of high-density polyethylene, 5-24 portions of composite fire-resisting agent and 3-7 portions of composite antistatic agent. It possesses excellent antistatic property, fire-resisting property, and toughness and high strength, corrosion resistance and other chemical property and mechanical property, and can be made into pipe material with extensive application range instead of steel pipe in various engineerings.

The utility model has discloses a coupling output structure for traveling wave tube amplifiers, which comprises an input port and an output port; wherein, the radius of the output port is bigger than that of the input port, a first grade gradually variable circle waveguide and an Nth rank gradually variable circle waveguide are cascaded between the input port and the output port. The utility model adopts the double-segment correcting Duelfer-Chebyshev gradually variable circle waveguide cascade connection or a transition circle waveguide cascaded in the central section of the double-segment correcting duelfer-chebyshev gradually variable circle waveguide. The utility model has the advantages of resolving the problems in prior art , such as large size, high reflection coefficient of the input port and weak capacity of parasitic mode restraint; when the coupling output structure is applied to traveling wave tube amplifiers, positive effects can be obtained, , which are of great practical significance for developing the high power microwave sources applied in long ranged radars and electronic warfare technology.

The invention provides a method for manufacturing a large-outside-diameter equal-diameter titanium tee joint. The method comprises the following steps: feeding, high-temperature pressing, cutting into molding material, welding and forming, and trimming or beveling. According to the invention, rough material is pressed through an upper die and a lower die and is welded and formed into a titanium tee joint, so that the technical defects in cutting and welding of an equal-diameter titanium tee joint with a outside diameter of 168.3 mm can be made up; and the titanium tee joint produced is beautiful, the inside wall is very smooth and unimpeded, the operation is simple and convenient, and the titanium tee joint is conveniently grasped by an operator, so that the work efficiency is greatly improved.

The invention relates to a ceramic shell filtering device. A ceramic shell (1) forms a cavity; the cavity comprises a shunt part (1-2) positioned at the upper part of the shell, a converging part (1-7) positioned at the lower part of the shell, and C-shaped pouring gates in the middle, wherein the upper end of the shunt part (1-2) is an inlet of the filtering device; the lower end of the converging part (1-7) is an outlet of the filtering device; the C-shaped pouring gates are connected in parallel, and are respectively communicated between the shunt part and the converging part; and each of the C-shaped pouring gates is provided with a filter (2). The ceramic shell filtering device realizes the overall filtration of high-flow molten metal outside a casting mold through the design of shunting, filtering and converging, and satisfies the overall filtering requirements of molten metal of a large cast steel piece and an ultra-large cast iron piece outside the casting mold.

The present invention provides a drilling method on a sheet metal. The drilling method comprises the following steps that: the sheet metal and an auxiliary processing piece are provided, the sheet metal includes an area to be drilled, the area to be drilled include a first surface and a second surface relative to the first surface, and the hardness number of the auxiliary processing piece is 0.7 times larger than that of the sheet metal. The auxiliary processing piece fit on the first surface of the area to be drilled. Holes are drilled between the auxiliary processing piece and auxiliary processing piece through a drill head, and the rotate speed of the drill head is larger than 8000 r/min during the drilling course. The auxiliary processing piece is taken down from the area to be drilled. The drilling method on the sheet metal has the advantage that qualities of the holes are improved.

The invention relates to an artificial pollination method for macadamia nut, and particularly relates to an application method for artificial pollination of macadamia nut, pollen collecting time of macadamia nut, appropriate time of pollination and a pollination tube. The artificial pollination method comprises the following steps: selecting spica bloomed on the same day; opening the pollination tube to wrap the to-be-collected spica; closing the pollination tube and lightly rotating the pollination tube; when a layer of thin pollen can be seen on the inner wall of the pollination tube, gently opening the pollination tube; then wrapping the to-be-pollinated spica by using the pollination tube collecting the pollen, gently closing the pollination tube, gently rotating for 4-5 circles; and opening and taking down the pollination tube to complete the pollination. The pollination tube is used to collect pollen and pollinate, so the style of macadamia nut is little influenced; the fruit setting rate is greatly increased to 4-5% 0.1-0.5% which is the fruit setting rate of natural pollination. By virtue of the method to pollinate, the purpose that the flowers can be used to improve the setting rate can be achieved; and the fruit setting amount can be determined according to the load of the tree. The method is simple to operate, low in cost and easy to promote.

The invention provides a technological cylinder cover for machining cylinder holes of an engine cylinder body; the technological cylinder cover is composed of an upper layer, a middle layer and a bottom layer connected through bolts, wherein the middle layer of the technological cylinder cover is made of aluminum alloy plates which have same texture with a cylinder cover to be simulated, holes of which the diameters are the same as these of the cylinder holes to be machined in the cylinder body are formed in the middle layer of the technological cylinder cover, the cylinder cover deformation can be simulated by CAE computation, and thus the actual cylinder cover can be simulated. The upper layer and the bottom layer of the technological cylinder cover are made of steel plates so as to reduce accumulated deformation and wearing of the technological cylinder cover caused by repeated use, technological holes corresponding to the cylinder holes in the middle layer of the technological cylinder cover are formed in the upper layer and the bottom layer of the technological cylinder cover. By using the technological cylinder to machine the cylinder holes, the cylinder holes distort as less as possible or hardly distort after the engine cylinder cover is installed, and thus the friction resistance between a piston ring and the cylinder hole wall is reduced, the run-in wear and oil consumption are decreased, the sealing property is improved, and the service life of the engine is prolonged.

The invention discloses a porous plum-blossom-shaped pipe, and belongs to the technical field of high-molecular materials. The raw materials comprises the following substances in parts by weight: 45-55 parts of high-density polyethylene resin powder, 18-22 parts of low-density polyethylene resin powder, 4.5-5.5 parts of high-strength glass fiber, 0.45-0.55 parts of a property modification stabilizer, and 9-11 parts of a property modification filling material. The plum-blossom-shaped pipe is relatively smooth in inner wall, cables can directly pass through the pipe without using other utensils, and time and labor are saved; the plum-blossom-shaped pipe is resistant to acids and bases, resistant to salts and alkalis, resistant to corrosion, resistant to oxidation, resistant to ageing, suitable in structure, high in usage value, long in service life, green and environment-friendly, and helps to improve the construction speed and substantially reduce the construction cost of an engineering unit.

The invention discloses a mould for preparing an ultra-high performance concrete pipeline. The mould comprises an outer steel mould and an inner steel mould with grouting holes, wherein a steel wedge block is arranged at a joint of the inner steel mould; the steel wedge block is supported on an inner wall of the inner steel mould through a wedge block; the inner steel mould is formed by splicing two steel components and a rubber part which is connected between the two steel components; fixing devices for clamping and fastening the inner steel mould are arranged at the two ends of the inner steel mould. The invention also discloses a method for preparing the ultra-high performance concrete pipeline by adopting the mould. According to the mould, the steel mould is combined with the rubber, so that the advantages of high rigidity and capability of bearing higher pumping pressure of the steel mould are utilized, the excellent deformability of the rubber is also utilized, and the shrinkage crack phenomenon of the pipeline is effectively eliminated.

The invention discloses a processing method for a supra-macromolecule polyethylene composite pipe. The processing method comprises the following steps of (1) uniformly mixing supra-macromolecule polyethylene resin, graphite, polyethylene wax and an antioxidant which serve as raw materials, adding the uniformly mixed raw materials into a material barrel of a screw extruder, and manufacturing a pipe with the same shape as that of a neck mold with a certain shape through the neck mold on the screw extruder under the rotary extrusion action of a screw, wherein the pipe passes through a sizing device and a cooling device and is cooled to be hardened and sized by a water-oil cooling mode; continuously and uniformly leading out a product during cooling after a product plastic piece is extruded from the neck mold, cutting the cooled and sized product through a cutting device, and inspecting the cut product, wherein the qualified product is a supra-macromolecule polyethylene pipe; (2) cutting and posttreating the supra-macromolecule polyethylene pipe, and putting the post-treated supra-macromolecule polyethylene pipe into a steel pipe to obtain the supra-macromolecule polyethylene composite pipe. According to the processing method, the technology is simple; the supra-macromolecule polyethylene composite pipe is easy to produce and manufacture; the manufactured pipe is high in abrasion resistance, self-lubrication property and intensity, stable in chemical property and high in aging resistance.

The invention discloses a large-caliber glass fiber-reinforced plastic ribbed pipe. The wall of the body comprises a liner layer, a continuous glass fiber-reinforced structure layer and a circumferential outer protective layer, and the outside of the circumferential outer protective layer is provided with a plurality of glass fiber fabric reinforcing rib rings which are arranged at intervals. The comprehensive internal pressure-resisting and external load-resisting capability of the large-caliber glass fiber-reinforced plastic ribbed pipe provided by the invention is greatly enhanced. The inner wall of the large-caliber glass fiber-reinforced plastic ribbed pipe is smooth, the rigidity of the large-caliber glass fiber-reinforced plastic ribbed pipe is high, and the size of the rib ring and the rib density can be designed according to rigidity requirement; compared with the rigidity of the pure glass fiber-reinforced plastic smooth pipe, the rigidity of the large-caliber glass fiber-reinforced plastic ribbed pipe is higher, and the large-caliber glass fiber-reinforced plastic ribbed pipe is lighter and stronger than the glass fiber-reinforced plastic mortar pipe; and as a novel delivery pipe, the large-caliber glass fiber-reinforced plastic ribbed pipe has the advantages of corrosion resistance, low fluid resistance, long service life and the like, is easy to maintain, and is particularly applicable to the fields of deeply buried large-caliber drainage pipelines, seawater delivery, seawater desalination and the like.