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

An apparatus is provided for x-ray inspection of a pipeline girth weld. This comprises a directional x-ray source 5 which is insertable into a pipeline section and is rotatable within the pipeline. Means are provided to align the directional x-ray source with an external x-ray detector such that both may be rotated through 360 degrees substantially coaxially with the pipeline section. Means for sampling the data detected by the x-ray detector are provided so that it may be further analyzed.

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.

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 relates to micro-mixing system and method for a photochemical reaction in a tubular reactor. The system is composed of a micro-mixing unit and a tubular photochemical reaction apparatusthat are connected in series. In the micro-mixing unit, a gas-phase or liquid-phase carrier, that is insoluble with a reaction liquid, can shear the reaction liquid into liquid columns. The system iscontinuous and stable and has high photo-energy utilization rate. By means of the system, the reaction liquid can be fully irradiated under a light source, wherein internal disturbance in the reactionliquid is effectively reinforced, and the photochemical synthesis process is enhanced. The system is low in production cost, is simple in operation and is controllable in process, and has great prospect in industrial application of photochemical reaction.

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 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 withhigh 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.

The invention discloses an upwelling anti-blocking method for a heavy-medium shallow slot sorting machine. A flow distribution plate is arranged on an upwelling hopper of the heavy-medium shallow slot sorting machine. The flow distribution plate is provided with upwelling distribution holes, and the aperture ratio of the flow distribution plate can be increased by adjusting the arrangement mode of the upwelling distribution holes and the hole interval in the direction of coal flow and gangue flow. Meanwhile, the total cross sectional area ratio of upwelling pipes and horizontal flow pipes of various models is controlled to ensure that upwelling and horizontal flow are in proper proportion, and therefore under the premise of normal sorting of the heavy-medium shallow slot sorting machine, the pipe diameter of each upwelling pipe is increased, the upwelling in the sorting process of the heavy-medium shallow slot sorting machine is also increased, heavy-medium suspension liquid in the heavy-medium shallow slot sorting machine is made stable, and the upwelling distribution holes and pipes can be prevented from being blocked. According to the method, by changing the shape of each flow distribution hole, the particle size lower limit of lump coal effectively separated by the heavy-medium shallow slot sorting machine can be lowered to 6mm from +13mm under the condition that the upwelling holes and pipes are effectively prevented from being blocked, and due to lowering of the separation lower limit of the heavy-medium shallow slot sorting machine, pressure of a fine cleaned coal separation system can be relieved to a great extent.

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.

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 discloses a comprehensive treatment device for aging resin, which comprises: an extraction kettle 1, a phase separator 1, a phase separator 2, and a distillation kettle 4; the extraction kettle 1 and the phase separator 1 are connected through pipelines , and a material pump one 6 is arranged in the middle; the phase separator one 2 and the phase separator two 3 are connected through pipelines, and a buffer tank 7 is arranged in the middle, and a material pump two 8 is arranged between the buffer tank 7 and the phase separator two 3 ; The top of the still 4 is connected with the still condenser 5, and the still condenser 5 is equipped with a condensate receiver 10; the bottom of the still 4 is connected with the centrifuge 9 through a pipeline. The device of the invention can realize continuous production, increase output and simplify operation. At the same time, through the design of the structure of the phase separator and the height of the outlet pipe, the separation effect of each component is improved and the recovery efficiency is improved.

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 discloses an anti-corrosion ship high-temperature heat exchanger, and relates to the field of ship heat exchange devices. A shell, a center pipe and a heat exchange pipe are included. The side walls of the two ends of the shell are provided with a shell side inlet and a shell side outlet correspondingly, the shell is in a cylinder shape, and the inner diameters of the shell are gradually increased from the shell side outlet to the shell side inlet. The center pipe is fixedly arranged in the shell, and the outer diameters of the center pipe are gradually increased from the shell side outlet to the shell side inlet. The heat exchange pipe surrounds the center pipe in the shell, a pipe side inlet and a pipe side outlet are formed in the two ends of the heat exchange pipe correspondingly, and the pipe diameters of the heat exchange pipe are gradually reduced from the pipe side inlet to the pipe side outlet. By means of the anti-corrosion ship high-temperature heat exchanger,the situation that seawater in the shell boils at the high-temperature medium inlet position, and consequently cavitation corroding is generated to the outer wall of the heat exchange pipe can be prevented; and safety and reliability of the heat exchanger can be better improved.