34results about How to "Increase the pipe diameter" patented technology

A water pipe includes a pipe main body made of a synthetic resin and an annular metal inner piece inserted into an end of the pipe main body. The inner piece has its diameter increased from the inside of the pipe main body so as to increase the diameter of at least a part of that portion of the pipe main body which corresponds to the inner piece. The inner diameter of the inner piece the diameter of which has been increased is almost the same as that of a portion of the pipe main body which is not enlarged by the inner piece.

The invention relates to a method for photochemically synthesizing vitamin D2 and D3 in a tubular reactor. The method is characterized in that the vitamin D2 and D3 are synthesized by ultraviolet light of different bands, the residence time of reaction liquid fed at different times in the tubular reactor is controlled to be the same by not dissolving with reaction liquid, not participating in reaction liquid separation and carrying ergosterol and 7-dehydrocholesterol reaction liquid and enhancing internal disturbance of the reaction liquid; the method has the advantages of continuous, stable and high efficiency of solar energy utilization, the operation is simple, and the process is controllable; the method has great prospect in the industrial production of the photochemically synthesizedvitamin D2 and D3.

A water pipe includes a pipe main body made of a synthetic resin and an annular metal inner piece inserted into an end of the pipe main body. The inner piece has its diameter increased from the inside of the pipe main body so as to increase the diameter of at least a part of that portion of the pipe main body which corresponds to the inner piece. The inner diameter of the inner piece the diameter of which has been increased is almost the same as that of a portion of the pipe main body which is not enlarged by the inner piece.

The invention relates to a U-shaped tube type heat exchanger which belongs to the technical field of solar energy heat utilization. The U-shaped tube type heat exchanger comprises a heat collection tube and is characterized by being provided with a U-shaped tube bundle and a runner chamber, wherein the U-shaped tube bundle and the runner chamber are combined into a whole and arranged in the heat collection tube; the runner chamber and the heat collection tube are sealed by a high-temperature resistant silica gel ring; the U-shaped tube bundle is formed by longitudinally arranging a plurality of parallel through holes on alloy, and one end of every two tubes is welded form a U-shaped tube elbow to form a plurality of sets of U-shaped tubes; the runner chamber consists of a tube nest with through holes and an end cover, and a cavity is formed between the tube nest and the end cover; the middle part of the cavity is provided with a partition board which divides the cavity into two chambers; and an inlet and outlet of the U-shaped tube bundle are welded in the through holes of the tube nest and communicated with the two cavities. The invention has compact and reasonable structure, high heat exchange efficiency, reliable sealing, long service life and easy production and manufacture and is not only suitable for a hot water system of a single family, but also suitable for a large-area solar hot water system requiring high pressure.

The invention relates to a gas separation flow system and a gas separation flow method for photochemical synthesis of 9-beta,10-alpha-dehydroprogesterone ketal. The method is characterized in that 9-beta,10-alpha-dehydroprogesterone ketal is synthesized in one step or two steps by utilizing ultraviolet light with different wave bands, a raw material 9-alpha,10-beta-dehydroprogesterone ketal reaction solution is separated by gas doing not participate in a reaction, the internal disturbance of the reaction solution is enhanced, and the retention time of the reaction solution in a tubular reactoris ensured to be consistent. The method has the advantages of being continuous, stable, high in light energy utilization rate, low in production cost, easy and convenient to operate and controllablein process, and has huge prospect in the industrial production of 9-beta,10-alpha-dehydroprogesterone ketal through photochemical synthesis.

A method of forming a leak tight connection between a pipe and a port made of different metals is described. A leak tight connection between a pipe made of a first metal and a port made of a second metal is also described.

The invention discloses a traditional Chinese medicine compound preparation for treating migraine and a preparation method thereof. The traditional Chinese medicine compound preparation comprises the following pharmaceutical raw materials: 1-20 parts of Szechuan lovage rhizome, 1-20 parts of dahurian angelica root, 1-20 parts of peppermint, 1-20 parts of oriental waterplantain rhizome, 1-20 parts of fineleaf schizonepeta herb and 1-20 parts of largehead atractylodes rhizome, and the part ratio is weight ratio. Ethanol is adopted for extracting active ingredients of the Szechuan lovage rhizome and the dahurian angelica root; and the steam distillation method is adopted for extracting volatile oil of the peppermint, the oriental waterplantain rhizome, the fineleaf schizonepeta herb and the largehead atractylodes rhizome, and water is further adopted for extracting other active ingredients. Extract solution of the six medicines are concentrated and dried; and the volatile oil is included via beta-cyclodextrin and uniformly mixed with extracts after drying, excipients are added, and a preparation is finally prepared. The medicine has good analgesic effect and can also be antagonistic to shrinkage role of PE (polyethylene) and 5-HT (5-hydroxytryptamine) to blood vessels, improve the diameter of capillary blood vessels, improve the microcirculation and effectively improve the cerebral blood flow of rats, thereby being an effective prescription for treating the migraine and Meniere's syndrome.

The present invention relates to a method for synthesizing transition metal oxide/silicon dioxide nano composite powder catalyst. Said invention adopts precursor hydrothermal method to make synthesis, and said catalyst can be used for preparing carbon nano tube, and said method includes the following steps: placing the catalyst into the catalytic bed quartz tube, heating to 500-600 deg.C under the condition of inert gas atmosphere, introducing hydrogen gas and reducing for 0.4-1.5 hr, when the temp. is reached to 630-780 deg.C, introducing acetylene and hydrogen gas whose volume ratio is 9:1-1:1 in the flowing rate of 40-200 ml/min to make it prduce cracking reaction to synthesize carbon nano tube, its reaction time is 0.5-1.0 hr.

The invention relates to the technical field of metal surface treatment. In order to solve the problem that an existing method cannot prepare a titanium niobium nitride nanotube structure at low costand high efficiency or prepare a matrix transition nitrided layer on the basis of the structure, the invention provides a preparation method for a titanium niobium nitride nanotube array and nitridedlayer composite structure. The method comprises the steps of (1) pretreatment, (2) anodizing, (3) annealing, and (4) high-temperature nitriding. A nanotube array structure is formed on the alloy surface firstly, and then nitriding and nitrogen diffusion treatment are carried out to convert oxide nanotube arrays into nitride nanotube arrays and meanwhile to form nitrided layers on a barrier layer and the matrix surface. The nanotube structure prepared by the preparation method is controllable, and high in binding force; the process is simple, and the cost is low; and the nanotube structure hasgood electrochemical properties, corrosion resistance and mechanical properties.

The invention relates to an intellectualization high-efficient automatic oil purifying device, which is favorable to desorbing the water, air, impurities and the like in oil with high efficiency at high speed so as to cause turbid oil to become clear and the structure to be more scientific and compacter, decrease the device volume and save raw materials and achieve the purpose of dehydration with high efficiency. In the device, the inlet of a strainer (15) is an oil inlet (16), the outlet of the strainer (15) is connected with the inlet of a heater (2) through an oil-feed pump (12), the outlet of the heater (2) is connected with a separation chamber (10), the upper parts of the separation chamber (10) and an atomizing chamber (11) are communicated, the lower part of the atomizing chamber (11) is communicated with the inlet of a secondary filter (14) through a reflux valve (13) and an oil scavenging pump (7), and the outlet of the secondary filter (14) is an oil outlet (17); and one end of a vacuum pump (5) is connected with a cyclic water tank (4), the other end thereof is connected with the upper part of a condenser (3), the other side of the upper part of the condenser (3) is communicated with the upper part of the atomizing chamber (11) and the lower part of the condenser (3) is connected with an automatic drainage device (8).

In a tool for mounting and dismounting a pipe clamp provided by the present creation, a first end portion and a movable second end portion are separately disposed on a base, and a connecting rod mechanism is used to convert circular motion into linear motion of the second end portion by force, so as to reduce the distance between the second end portion and the first end portion, thereby achieving an effect that the annular inner diameter of a pipe clamp is increased when the pipe clamp is held between the first end portion and the second end portion.

A process for operating a settling slurry transportation pipeline is provided, comprising: determining the deposition velocity for a particular slurry being transported through the pipeline; and operating the pipeline at an operating velocity at or near the deposition velocity to form a stationary or near stationary bed of solids that will still allow the slurry to freely flow through the pipeline and not plug the pipeline.

The invention discloses a motorcycle flat fork, which comprises left and right flat fork side pipes, the left and right flat fork side pipes are connected through connecting pipes, the front ends of the left and right flat fork side pipes are respectively equipped with rear mounting frames, the Rear hanging columns are installed on the rear mounting frame, and the rear hanging columns are greater than or equal to two pairs. This product sets the logarithm of the rear hanging column to be greater than or equal to one pair, which reduces the vibration transmitted from the motorcycle engine, makes the force distribution of the motorcycle more uniform and reasonable, and increases the comfort of the driver when driving. , the diameter and thickness of the entire rear fork are increased, and the rear fork is not easy to break, making the motorcycle more firm and safe. This product has a reasonable and stable structure, high strength and easy installation.

The invention discloses a comprehensive treatment device for aged resin. The comprehensive treatment device comprises an extraction kettle 1, a first phase separator 2, a second phase separator 3 anda distillation kettle 4, the extraction kettle 1 is connected with the first phase separator 2 through a pipeline, and a first material pump 6 is arranged in the middle of the pipeline between the extraction kettle and the first phase separator 2; the first phase separator 2 is connected with the second phase separator 3 through a pipeline, a buffer tank 7 is arranged in the middle of the pipelinebetween the first phase separator 2 and the second phase separator 3, and a second material pump 8 is arranged in the middle of the pipeline between the buffer tank 7 and the second phase separator 3; and the top of the distillation kettle 4 is connected with a distillation kettle condenser 5, the distillation kettle condenser 5 is equipped with a condensate receiver 10, and the bottom of the distillation kettle 4 is connected to a centrifuge 9 through a pipeline. The comprehensive treatment device can realize continuous production, improves the yield and simplifies the operation; and meanwhile, through the design of the structures of the phase separators and the height of an outlet pipeline, the separation effect of each component is improved, and the recovery efficiency is improved.

The invention discloses a filter press with a one-way valve compartment type filter plate, which comprises a filter plate and a filter plate frame, wherein the filter plate frame is arranged at the edge of the filter plate. The filter press is characterized in that a feeding channel is arranged in the filter plate frame of the upper half section and used for conveying a filter material, a discharging port is formed in the inner side of the filter plate frame and used for discharging the filter material, a feeding port is formed in the outer side of the filter plate frame, and the feeding port and the discharging port are communicated with the interior of the feeding channel; a one-way valve is arranged on the frame of the filter plate at the discharging port and is used for preventing the filter material from flowing back into the feeding channel; a water outlet pipeline is arranged in the filter plate frame of the lower half section, a plurality of filtered water inlets which are uniformly arranged are formed in the inner side of the filter plate frame and are used for infiltration of filtered water, and the filtered water inlets are communicated with the interior of the water outlet pipeline; and a water outlet is formed in the bottom of the filter plate frame and used for outflow of filtered water. By arranging the one-way valve, the filter material is effectively prevented from flowing back into the feeding channel.

The present invention relates to a far-infrared pulse acupuncture and moxibustion and magnetotherapeutic band, it is a comprehensive therapuetic equipment integrating neodymium-ion-boron magnetic device, far-infrared heat radiator, pulse electronic acupuncture and moxibustion device and nano bio-active multifunctional fibre into one body for curing rheumatic arthritis disease. It is safe and reliable in therapeutic effect.