221 results about "Double-walled pipe" patented technology

The utility model discloses a cracking kettle for preparing sebacic acid by cracking castor oil. The device is characterized in that a cracking kettle body is divided into an upper-layer kettle and a lower-layer kettle, and the upper-layer kettle and the lower-layer kettle are separated by a separation plate; a plurality of gas dispersion channels are distributed on the isolation plate; the gas dispersion channel is made of a non-sticky high-temperature-resistant material, the gas dispersion channel is a bevel channel, and the inlet end and the outlet end are symmetrically arranged up and down; a feeding channel is arranged above the cracking kettle body, an internal channel is arranged at the top in the cracking kettle body, a through hole is formed in the isolation plate, and the internal channel penetrates through the through hole of the isolation plate and is communicated with the lower-layer kettle; the feeding channel penetrates into the cracking kettle body and is communicated with the internal channel; the inner channel is a double-layer pipeline, the inner space is a stirring rod channel, and the outer space is a feed liquid channel; the stirring rod penetrates through the stirring rod channel and extends into the lower-layer kettle; the stirring paddle is spirally arranged at the lower end of the stirring rod. The gas outlet can be protected, the gas outlet is prevented from being blocked by non-gas products, and smooth output of the gas products is guaranteed.

The application provides a kind of super-long chemical pipeline conveying system, comprising: centralized liquid supply system equipment;Several chemical distribution plates;Several transparent PVC boxes, and hollow double-layer pipes;For connecting centralized liquid supply system equipment, chemical distribution plate and transparent PVC box;Hollow double-layer pipe includes transparent PVC pipe and PFA hose, transparent PVC pipe is contained in transparent PVC direct head, PFA hose is contained in transparent PVC pipe, PFA hose diameter is 1-1.5 inch, transparent PVC box is internally provided with by letting box, by letting box includes several adapters, locking nuts and electronic valves, electronic valve is electrically connected with PLC and smoke sensor;Transparent PVC box bottom surface is also provided with several reagent boxes, and reagent box contains reagent that can react with dangerous chemicals to generate smoke.The application can realize super-long chemical transportation turning to prevent pipeline rupture, and prevent chemical leakage.

The invention discloses a feeding and discharging manipulator for a production line, which relates to the technical field of manipulators and comprises a manipulator body, a clamping mechanism mounted at the end of the manipulator body and a first workpiece arranged in an inner cavity of the clamping mechanism. The positioning clamping plate is installed at the end of the manipulator body and used for being connected with the clamping mechanism, the double-layer pipeline is arranged on the lower surface of the positioning clamping plate and can drive the clamping mechanism and the first workpiece to rotate left and right, and a second workpiece and an object placing table for placing the second workpiece are arranged under the first workpiece. A plurality of hidden limiting mechanisms capable of automatically centering and positioning a second workpiece are arranged on the inner wall of the storage table, the first workpiece is guided through a guide groove to achieve staged recovery and rotate leftwards and rightwards for fine adjustment at the same time, dislocation correction is achieved, and before the first workpiece and the second workpiece are installed and connected in a butt joint mode, the second workpiece can rotate leftwards and rightwards. A plurality of hidden limiting mechanisms can be driven to pop up, so that the centering positioning function of the second workpiece is realized, and the efficiency of the whole production line is improved.

The invention discloses a bimetal composite pipe end welding device and method, and relates to the technical field of welding, the bimetal composite pipe end welding device and method comprise a base, a fixing plate and a welding mechanism, the fixing plate is arranged on the top of the base, the welding mechanism is arranged on the inner side of the fixing plate, and the welding mechanism is arranged on the inner side of the fixing plate. The welding mechanism comprises a first motor, cutting machines, a spring telescopic rod, a second welding machine mechanism and a protective barrel plug, the first motor is used for driving the cutting machines to conduct position adjustment according to the size of an actually-welded pipeline, and after the multiple cutting machines cut the outer layer of a section of double-layer pipeline, the argon arc welding machine mechanism on the mounting ring is driven to surround the outer side of the pipeline; the outer layer welding is completed according to the inner layer welding principle, overall welding of the bimetal composite pipe is achieved, the problems of weld cracks and air holes caused by traditional bimetal composite pipe welding are avoided, the welding quality is improved, the production cost is reduced, and the working time is shortened.

The invention provides a multifunctional experimental device and method for simulating a corrosion state in a submarine pipeline, and belongs to the field of pipeline corrosion internal detection. The experimental device comprises an experimental device body, a heating device and a circulating pump, a medium in the experimental device body can be externally heated through the circulating pump, and in other words, the circulating pump can continuously convey the medium heated by the heating device to the experimental device body. The test method comprises a corrosion coupon experiment, a corrosion probe experiment and a double-layer pipe annulus corrosion simulation experiment. When a corrosion coupon experiment and a corrosion probe experiment are carried out, a corrosion probe and a corrosion coupon are respectively inserted into the experiment device main body, and corrosion rate data are continuously monitored and detected for 7 days; when a double-layer pipe annulus corrosion simulation experiment is carried out, wireless wall thickness detectors are sequentially attached to the three clamping grooves, and the average corrosion rate of the wireless wall thickness detectors is based on thickness measurement data of the wireless wall thickness detectors. According to the invention, a plurality of corrosion rate simulation parallel experiments can be simultaneously carried out, the operation is simple, the safety is high, and the controllability is high.

The invention provides a shallow-buried tunnel hole-entering construction method under the residual, broken and accumulated geological condition. The shallow-buried tunnel hole entering construction method under the residual and broken accumulation geological conditions comprises the following steps that S1, surveying and setting out are conducted, the light and shade boundary mileage and the excavation outer contour line and the plane position of a hidden hole are set out, and marking is conducted in a drawing; s2, lofting and measuring the elevation of the catchwater at the top of the tunnel by measuring personnel, and cleaning the surface of the catchwater at the top of the tunnel before excavation. According to the shallow-buried tunnel entering construction method under the broken and accumulated geological conditions, a pipe shed lengthening mode is adopted for firstly excavating a pipe shed working chamber in a tunnel, then single-layer pipe shed and advanced small guide pipe construction is adopted, different excavation modes are adopted, V-grade surrounding rock soil and stones are used in a left-right layered mode, and a single-side-wall pilot tunnel and short step method is adopted; and in addition, the method of double-layer pipe shed construction and cover arch construction is adopted, so that the supporting safety is better guaranteed.

The invention relates to the technical field of hydraulic oil cylinders, in particular to a multi-section type hydraulic oil cylinder which comprises a first oil-saving cylinder and a second oil-saving cylinder which are connected in series, a first cooling spiral pipe and a second cooling spiral pipe are designed, and a double-layer pipeline structure is adopted in a spiral pipeline, namely the first cooling spiral pipe and the second cooling spiral pipe. Fluid in the first outer pipeline and the second outer pipeline exchanges heat with fluid in the first inner pipeline and fluid in the second inner pipeline, the fluid in the first outer pipeline and the fluid in the second outer pipeline take away heat in the cylinder barrel, and the temperature of the fluid in the first outer pipeline and the temperature of the fluid in the second outer pipeline are reduced through heat exchange of the fluid in the first inner pipeline and the fluid in the second inner pipeline. The first cooling spiral pipe and the second cooling spiral pipe can be cooled continuously, the sustainable cooling effect is improved, meanwhile, the specific flow channel structures of the first cooling spiral pipe and the second cooling spiral pipe are designed, the heat exchange efficiency is improved, the oil cylinder is protected to be in the normal use state, and the service life of the oil cylinder is prolonged.

The invention relates to the technical field of oil well exploitation equipment, in particular to an underground coiled tubing capable of controlling the flow of produced liquid. The device comprises a double-layer pipe fitting and a flow control assembly. The motor drives the side frame to slide up and down along the inner wall of the extension plate through the control shaft, then the variable section pipe is driven to move up and down in the inner pipe, when the variable section pipe moves downwards, the area, exposed out of the bottom of the packer, of the square opening is increased, otherwise, the area is reduced, and the flow in unit time is changed by changing the exposed circulation sectional area of the square opening; meanwhile, when the variable fluid moves upwards to reduce or moves downwards to increase the circulation sectional area, the elastic piece is synchronously compressed or stretched to increase or reduce pressure, the pressure balance of the liquid in the first oil cavity is maintained, and the purpose of adjusting the flow is achieved. The conditions of cavitation damage, water hammer vibration and the like caused by remarkable reduction of the pressure in the pipeline can be avoided, and therefore stable operation of the pipeline can be guaranteed while the flow can be adjusted.

The invention relates to the field of oil pumps, in particular to a centralized high-pressure common rail system. The common rail system comprises a PVC valve, a right cross rail connecting pipe, a left cross rail connecting pipe, a right high-pressure common rail, a left high-pressure common rail, a high-pressure oil pipe A, a high-pressure oil pipe B, a high-pressure oil pipe C, a safety valve and a rail pressure sensor, one side of the PVC valve is communicated with the right high-pressure common rail through the right cross rail connecting pipe, and the other side of the PVC valve is communicated with the left high-pressure common rail through the left cross rail connecting pipe. And a rail pressure sensor is mounted at the end of the right high-pressure common rail. The left high-pressure common rail and the right high-pressure common rail are connected at the rear end of the diesel engine, and it is guaranteed that oil pressure in oil cavities of the left high-pressure common rail and the right high-pressure common rail tends to be consistent; the high-pressure common rail is of a double-layer pipe structure, and the high-pressure oil pipe and the high-pressure common rail are connected and sealed through a ball head. The high-pressure common rail inner pipe is an integral steel pipe, and the high-pressure common rail outer pipe is a sectional steel pipe, so that the high-pressure common rail has better safety and leakproofness.

The utility model relates to the field of oil pumps, in particular to a centralized high-pressure common rail system. The common rail system comprises a PVC valve, a right cross rail connecting pipe, a left cross rail connecting pipe, a right high-pressure common rail, a left high-pressure common rail, a high-pressure oil pipe A, a high-pressure oil pipe B, a high-pressure oil pipe C, a safety valve and a rail pressure sensor, one side of the PVC valve is communicated with the right high-pressure common rail through the right cross rail connecting pipe, and the other side of the PVC valve is communicated with the left high-pressure common rail through the left cross rail connecting pipe. And a rail pressure sensor is mounted at the end of the right high-pressure common rail. The left high-pressure common rail and the right high-pressure common rail are connected at the rear end of the diesel engine through the left high-pressure common rail and the right high-pressure common rail, so that oil pressure in oil cavities of the left high-pressure common rail and the right high-pressure common rail tends to be consistent; the high-pressure common rail is of a double-layer pipe structure, and the high-pressure oil pipe and the high-pressure common rail are connected and sealed through a ball head. The high-pressure common rail inner pipe is an integral steel pipe, and the high-pressure common rail outer pipe is a sectional steel pipe, so that the high-pressure common rail has better safety and leakproofness.

The invention discloses a powder double-layer suction pipe matched with an upper-opening storage barrel and a method, and relates to the technical field of uranium conversion related equipment. The device is used in cooperation with a storage barrel with an upper opening. The device comprises a double-layer pipe and a material gathering plate, the double-layer pipe comprises an outer pipe and an inner pipe coaxially arranged in the center of an inner hole of the outer pipe, an annular column area is formed between the inner pipe and the outer pipe, and a plurality of feeding holes are formed in the lower end of the inner pipe; the plurality of material gathering plates are annularly and uniformly distributed and fixedly connected to the outer circular surface of the lower end of the outer pipe; a feeding hole is formed in the excircle surface of the lower end of the outer pipe. A powder suction method matched with a storage barrel with an upper opening is used for being matched with a negative pressure system to suck powder materials in the storage barrel with the upper opening, and by being matched with an original eccentric rotation suction method, powder material residues are avoided, and the suction efficiency is improved. The invention provides a powder material suction structure and a powder material suction method which are adaptive to an upper-opening storage barrel based on a technical route of conveying powder materials through a gas path, and the powder material suction structure and the powder material suction method are particularly suitable for efficient and residue-free transfer of UO2 powder in the nuclear fuel preparation process.

A heat exchange device for waste heat recovery of a screw air compressor comprises a U-shaped coil pipe, a spiral fin is arranged on a straight pipe section of the U-shaped coil pipe, a sleeve is arranged outside the spiral fin, and the sectional area of the sleeve is larger than that of the U-shaped coil pipe. The two ends of each sleeve are closed, connecting pipes are arranged on the pipe walls of the closed ends, and the sleeves are sequentially connected through the connecting pipes. A cold medium is introduced into the sleeve, and a hot medium from the screw air compressor is introduced into the U-shaped coil pipe. The heat exchange device adopts a double-layer tubular heat exchange structure, a hot medium is introduced into the tube, a cold medium is introduced outside the tube, and heat is exchanged through the tube wall and the spiral fins. According to the heat exchange device, waste heat generated by the screw air compressor is recycled, the water supply requirement of a bathhouse is met, and the screw air compressor is effectively cooled. The heat exchange device has the advantages of being small in size, compact in structure, high in heat exchange efficiency and reasonable in heat exchange matching.

The invention relates to a pipe manufacturing process for a pipe with different thicknesses, which is characterized by comprising the following steps of: 1, setting the wall thickness of a target pipe with different thicknesses, selecting a blank with the wall thickness equal to the minimum wall thickness of the target pipe with different thicknesses as a main body pipe blank, and selecting a blank with the wall thickness equal to the difference between the maximum wall thickness and the minimum wall thickness of the target pipe with different thicknesses as a thickened section blank; step 2; the thickened section blank is bonded to the preset thickened position of the main body pipe blank through structural adhesive; thirdly, the main body pipe blank and the thickened section blank which are bonded are welded and bent through a welding and bending mechanism to form a reel pipe; and fourthly, an inner supporting mechanism is placed in the reel pipe, and then the butt joint of the reel pipe is welded through high-frequency induction welding. The pipe manufacturing process is low in cost and high in efficiency, existing equal-thickness plates are adopted as raw materials, and differential-thickness pipes and double-layer pipes can be produced by transforming an existing pipe coil production line; the plates are connected in a welding mode, pipe expanding extrusion friction cannot be generated on the plates, and the problem of local fracture is not prone to occurring.

The utility model relates to a frame-passing joint and a connecting system thereof. The over-frame joint comprises a flange plate (10), an inner pipe receiving part (20) and an outer pipe receiving part (30), the outer pipe receiving part is concentrically arranged on the outer side of the inner pipe receiving part, an annular space is formed between the inner pipe receiving part and the outer pipe receiving part, and at least one rib part (31) connecting the inner pipe receiving part and the outer pipe receiving part is arranged in the annular space. A first substance with a first phase state and a second substance with a second phase state respectively penetrate through the outer pipe containing part and the inner pipe containing part to flow, the flange plate surrounds the outer pipe containing part and is integrally formed on the outer side of the outer pipe containing part, and at least one connecting hole (11) for connecting the over-frame connector to an installation target is formed in the flange plate. The over-frame connector not only can realize over-frame connection between double-layer pipelines, but also can be suitable for over-frame connection between single-layer pipelines and double-layer pipelines, so that great convenience is provided for a fuel system of an aircraft.

The utility model discloses a fuel supply and security system for a marine ammonia fuel engine, including a liquid ammonia fuel tank, a nitrogen tank, a fuel supply skid unit, an ammonia capture unit, a high-pressure common rail double-wall pipe, a central control unit and a collection tank. The utility model significantly improves the safety and stability of the marine ammonia fuel engine. The fuel supply skid unit realizes high-coverage high-pressure purge of ammonia accumulation at the bottom of the fuel supply skid unit box and high-efficiency discharge and replacement of gaseous ammonia. The nitrogen capture unit can not only process pure ammonia vapor volatilized from the liquid ammonia storage tank, but also process ammonia-nitrogen mixed gas sent from the fuel supply skid and the collection tank, effectively increasing the working margin and processing capacity of the ammonia capture unit.

The utility model discloses a double-layer hose folding device, and belongs to the technical field of automatic hose production. The device comprises a platform, a plurality of pairs of gradual change rollers are arranged on the platform, each gradual change roller comprises a fixed end and a free end, the fixed ends are arranged on the platform, the free ends are obliquely arranged relative to the platform, and the outer side included angles between the fixed ends of the front and back adjacent gradual change rollers and the platform are gradually increased in the advancing direction of the double-layer hose on the platform. And the double-layer sheet moves under the rotation of the gradual change rollers and / or the conveying of the conveying rollers on the platform, is gradually limited by the multiple pairs of gradual change rollers, and is finally folded into the double-layer pipe. According to the utility model, through the six pairs of gradual change rollers arranged on the production line, raw materials are rolled from a sheet shape when traction equipment advances, so that the double-layer hose folding operation is completed or the raw materials are directly placed on the six pairs of gradual change rollers, and the gradual change rollers are uniformly driven by the air cylinders, so that the two sides of the double-layer sheet are folded towards the middle of the double-layer sheet; and finally folding to form the double-layer pipe.

The invention relates to an ultrasonic centrifugal magnetic separation column for strengthening fine-fraction mineral recovery. The ultrasonic centrifugal magnetic separation column comprises a separation cylinder (19); the hollow column body (4) is arranged in the separation cylinder (19) in a penetrating mode, the lower portion of the hollow column body (4) is a double-layer pipe, a concentrate opening is formed in the sealed end of the hollow column body (4), and a concentrate scraper (8) is arranged on the outer side of the hollow column body (4); the small end of the inverted-T-shaped central column (2) is arranged in the hollow column body (4) in a penetrating manner, and the large end of the inverted-T-shaped central column (2) and the hollow column body (4) are arranged at intervals; the fine grain concentrate discharging pipe (14) penetrates through the central column (2) and is connected with a concentrate opening; the coarse and fine grain periodic excitation coil (10) is arranged on the separation cylinder (19) and the hollow cylinder (4); and the elutriation water dividing pipe (15) ascends. According to the device, the stress difference between coarse-grain minerals and fine-grain minerals and between magnetic minerals and non-magnetic minerals in the separation process of the magnetic separation column is enhanced, and the loss of the fine-grain magnetic minerals in tailings is reduced. The problems that an existing magnetic separation column is high in tailing magnetic mineral content and small in concentrate grade improvement are solved, and the concentrate quality is improved.

The invention relates to a mounting method for a top deck section and a double-wall pipe of a fuel cabin of a dual-fuel container ship. The deck section is divided into a deck assembly, an A-area longitudinal bulkhead assembly, a B-area longitudinal bulkhead assembly and a C-area longitudinal bulkhead assembly; the deck assemblage and the C-area longitudinal bulkhead assemblage are separately constructed, and the A-area longitudinal bulkhead assemblage is integrally constructed when the deck assemblage is constructed; longitudinal bulkheads in the B area are assembled and manufactured in bulk; sand washing and coating are conducted; mounting the B-area longitudinal bulkhead assemblage in bulk under the inverted placement of the deck assemblage: respectively mounting four longitudinal bulkhead plates of the B-area longitudinal bulkhead assemblage on the deck assemblage, enabling a double-wall pipe to penetrate through the four longitudinal bulkhead plates of the B-area longitudinal bulkhead assemblage, and mounting rib plates among the four longitudinal bulkhead plates; and the C-area longitudinal bulkhead assemblage is carried on the B-area longitudinal bulkhead assemblage. According to the method, the deck is segmented and divided into different assemblies for construction, after sand washing and coating are conducted, the double-wall pipe is installed, and the assemblies are folded and carried, so that the double-wall pipe is prevented from being damaged.

The present invention discloses a double-layer pipeline shield tunnel prefabricated pipe segment capable of collecting geothermal energy, wherein a plurality of prefabricated component blocks are spliced ​​with each other through facing end faces to form an annular pipe segment body; a double-layer heat exchange pipe, namely an outer pipe and an inner pipe, is arranged in the steel cage of each prefabricated component block, close to the outer wall and inner wall of the corresponding shield tunnel respectively; grooves are arranged at both ends of each prefabricated component block, corresponding to the position of the inner wall of the corresponding shield tunnel; both ends of each heat exchange pipe are exposed at the corresponding groove position in a structure perpendicular to the corresponding end face; a plurality of inner pipes in a plurality of prefabricated component blocks of each pipe segment body, and a plurality of outer pipes are connected end to end in sequence to form an inner and outer ring heat exchange unit, and are connected to a heat pump through a water supply pipe and a return pipe, so as to form a circulation of a heat-carrying fluid in the pipe segment of the shield tunnel. The present invention realizes heat exchange between the heat-carrying fluid and the pipe segment by directly arranging the heat exchange pipe in the pipe segment of the shield or TBM tunnel.

This invention discloses an in-situ instrument insulation device, comprising an outer insulation tube and an inner insulation tube, which are sleeved together to form a cavity structure. This cavity structure is a vacuum double-layer tube structure. A gas chamber sampling tube is disposed within the inner insulation tube. The cavity structure is an internal interlayer structure, which is silver- or copper-plated. A guide plate with guide fan blades is disposed within the inner insulation tube. This invention, by setting a vacuum double-layer tube structure, blocks heat conduction and convection between the outer and inner insulation tubes. Simultaneously, the silver or copper plating of the internal interlayer of the cavity structure further weakens heat radiation between the interlayers, fundamentally blocking heat transfer and achieving insulation, thus significantly reducing heat loss from the heat tracing pipe.

The utility model relates to a pipe fitting end sealing clamp which comprises an end sealing main body and an intercalation assembly which are connected with each other, the end sealing main body comprises a first face and a second face which are opposite to each other, the first face of the end sealing main body and the second face of the end sealing main body are both closed figures with non-hollow interiors, and the intercalation assembly comprises a first end face and a second end face which are opposite to each other. The first end face of the intercalation assembly is connected to the second face of the end sealing body. The area of the second end face of the intercalation assembly is smaller than that of the first end face of the intercalation assembly, and the first projection of the first end face of the intercalation assembly on the second face of the end sealing body is in the second face of the end sealing body. And the second projection of the second end surface of the intercalation assembly on the second surface of the end sealing main body is in the peripheral contour of the second end surface of the intercalation assembly. The pipe end sealing clamp is suitable for end face sealing in the double-layer pipe vacuum glue injection process, effectively prevents leakage of air and glue in the glue injection process, and is simple in structure and convenient to operate.

The utility model discloses an air conditioner connecting pipe with a good noise reduction effect, which relates to the technical field of air conditioner connecting pipes and comprises an inner pipe and an outer pipe. The outer tube is arranged on the outer side of the inner tube in a sleeving manner, and a tubular melamine foam layer is arranged between the inner tube and the outer tube; according to the connecting pipe for the air conditioner, the double-layer pipe structure of the inner pipe and the outer pipe is arranged, the melamine foam layer is arranged between the inner pipe and the outer pipe, melamine foam has excellent sound absorption performance, internal noise can be effectively prevented from being spread out of the pipe, and the noise reduction effect of the connecting pipe for the air conditioner is improved.

The utility model relates to the technical field of double-layer pipe machining, in particular to a double-layer pipe chambering and flanging machine which comprises a base, a base is arranged above the base, the lower end of the base is fixedly assembled with the surface of the base through a screw, a spiral electric heating pipe is further installed at the upper end of the base, and connecting rods are arranged on the two sides of the base respectively. The two sides of the spiral electric heating pipe are fixedly sleeved with side bases respectively. The port of the double-layer pipe is conveyed and is in butt joint with the reaming and flanging die, the pipeline is in sliding cup joint with the smooth section at first, the transition conveying and butt joint effect can be achieved, then under the heating effect, the material of the pipeline is softened, the pipeline is continuously conveyed, the port of the pipeline continues to move and passes through the reaming section, and then the pipeline is continuously expanded. By means of the softening deformation effect, chambering of the pipeline end opening can be achieved, under the softening condition, conveying continues to be conducted, the pipeline end opening makes contact with the edge folding section, and edge folding machining of the pipeline end opening can be completed.

The invention belongs to the technical field of double-layer pipeline deburring, and provides a tool for double-layer pipeline deburring and a using method thereof.The tool comprises a sleeve and a cutting part, the cutting part is fixedly arranged at one end of the sleeve, the inner diameter of the sleeve is matched with the outer diameter of an inner-layer pipe of a double-layer pipeline, and when the sleeve is arranged on the inner-layer pipe of the double-layer pipeline in a sleeving mode, the cutting part is fixed to the inner-layer pipe of the double-layer pipeline. And the cutting piece can be in contact with the outer-layer pipeline of the double-layer pipeline. The sleeve is matched with the cutting part, the inner diameter of the sleeve is matched with the outer diameter of an inner-layer pipe of a double-layer pipeline, the sleeve can be accurately arranged on the inner-layer pipe in a sleeving mode, and the cutting part makes contact with an outer-layer pipeline. During operation, the sleeve is inserted into an inner-layer pipeline, and the handle is rotated to drive the cutting piece to remove burrs, so that various defects of manual filing are avoided, the deburring efficiency and quality are greatly improved, and a solid foundation is laid for subsequent assembling and welding procedures.

The invention relates to the technical field of electrolytic machining, in particular to an electrolysis tube electrode, an electrolysis device and an electrolysis method.The electrolysis tube electrode comprises an inner-layer tube and an outer-layer tube, the inner-layer tube is provided with a first liquid inlet and outlet and a second liquid inlet and outlet, the second liquid inlet and outlet is located in the end face of the inner-layer tube, the inner-layer tube is sleeved with the outer-layer tube, and the outer-layer tube is connected with the inner-layer tube; the outer-layer pipe is provided with a third liquid inlet and outlet and a fourth liquid inlet and outlet, and the fourth liquid inlet and outlet is located in the circumferential face of the outer-layer pipe. By arranging the double-layer pipe, when electrolyte enters the pipe electrode from the inner-layer pipe and flows to a workpiece, the electrolyte on the workpiece is discharged through the outer-layer pipe; after electrolyte enters the pipe electrode from the outer-layer pipe and flows to a workpiece, the electrolyte on the workpiece is discharged through the inner-layer pipe, electrolytic milling can be directly carried out after electrolytic drilling, and operation is easy and convenient; and meanwhile, the product removal efficiency can be improved during electrolytic drilling and electrolytic milling, and a stray corrosion area on the surface of a workpiece is reduced.

The utility model discloses a geothermal well thermal insulation pipe structure which comprises an outer layer pipe, an inner layer pipe is further arranged in the outer layer pipe, the outer layer pipe clamps the inner layer pipe through a plurality of fixing assemblies, and the inner layer pipe and the outer layer pipe are coaxially arranged. The fixing assembly comprises a first fixing plate and a second fixing plate, the first fixing plate is fixed to the inner wall of the outer layer pipe, fixing grooves are formed in the two ends of the arc-shaped first fixing plate, fixing blocks are arranged at the two ends of the arc-shaped second fixing plate, and the fixing blocks are clamped in the fixing grooves. The inner-layer pipe and the outer-layer pipe are arranged at the same time, heat loss is effectively reduced through the double-layer pipeline, the transmission efficiency of geothermal energy is improved, energy waste is reduced, the safety of the pipeline can be improved through the design of the double-layer pipeline, and the operation risk of a geothermal well system is reduced; the inner-layer pipe is supported through the first fixing plate and the second fixing plate, so that the structure of the heat preservation pipe is more stable, extrusion and deformation of fluid media inside and outside the heat preservation pipe can be borne, and the risk of pipeline breakage is reduced.

The invention belongs to the technical field of pipelines, and discloses a high-temperature-resistant smoke prevention and exhaust air duct which comprises an outer-layer pipe and an inner-layer pipe, the inner-layer pipe is fixed in the outer-layer pipe through a plurality of reinforcing ribs, and the space between the outer-layer pipe and the inner-layer pipe is filled with a fireproof heat insulation core material. A rotating shaft is rotationally connected between the inner walls of the two sides of the inner-layer pipe, an adjusting baffle is fixedly connected to the periphery of the rotating shaft, and one end of the rotating shaft extends to the exterior of the outer-layer pipe and is fixedly connected with a connecting rod. According to the smoke control and exhaust system, the problems that the existing smoke control and exhaust system lacks a flexible air volume adjusting function and is difficult to adapt to the requirements of optimal flow velocity intervals in different fire scenes are solved, the high-temperature resistance is improved through cooperation of a double-layer pipe structure and a fire-resistant heat-insulation core material, and accurate air volume control is achieved through an adjustable baffle, so that the safety and the smoke exhaust efficiency of the smoke control and exhaust system are improved.

The present invention discloses a segmented forward drill pipe rapid grouting device, comprising: a plurality of double-tube drill pipes, each of which is a concentric double-tube structure, with an annular channel formed between the outer tube and the inner tube, and the inner tube being a hollow structure; each double-tube drill pipe is used to be axially arranged in a grouting hole in sequence in sections, and can be detachably connected and communicated in sequence front and back. A drill bit is provided with a single through hole in the axial direction, which is connected and communicated with the end of a double-tube drill pipe at the front end. A plurality of hydraulic bladder infusion tubes, each of which is a tube body with open ends, is parallel to and tightly fits the double-tube drill pipe. A grout-stopping hydraulic bladder is a hollow elastic sac-shaped body, which is coated around the outer wall of the front section of the double-tube drill pipe at the front end, and is communicated with the hydraulic bladder infusion tube at the front end. When grouting with the grouting device, the fixed-point grouting can be quickly sealed at any time without withdrawing the drill pipe, and then the seal can be cancelled to continue drilling forward, thereby realizing segmented forward grouting.

The utility model discloses a double-layer pipe strip with hidden stitches, which is characterized in that lining cloth, a box shell and zipper cloth are respectively stitched, and meanwhile, the stitches are hidden, so that the double-layer pipe strip looks smoother and more attractive. The utility model discloses a double-layer pipe strip capable of hiding sutures. The double-layer pipe strip comprises a strip-shaped pipe strip, the section of the pipe strip comprises a first blocking strip arranged on the outer side, and a first fixing strip, a second fixing strip and a third fixing strip are arranged on the surface of the same side of the first blocking strip in a protruding mode from inside to outside. A first clamping groove is defined by the first fixing strip and the second fixing strip, and a second clamping groove is defined by the second fixing strip and the third fixing strip. The edge of the lining is inserted into the first clamping groove, the edge of the box shell is inserted into the first clamping groove, and the lining and the box shell are stacked; the edge of the zipper cloth is inserted into the second clamping groove; and a sewing thread penetrates through the first fixing strip, the lining, the box shell, the second fixing strip and the zipper cloth to be fixedly connected.

The utility model discloses a pipe plugging assembly and a pipe bundle plugging structure of an air dry cooling radiator. The pipe plugging assembly comprises a plug and a plug cap which are integrally formed and made of plastic materials. The plug is provided with a variable-diameter section which is tightened along the direction far away from the plug cap according to a preset taper, and a non-variable-diameter section which is formed at the tail end of the variable-diameter section and extends straightly; the maximum outer diameter of the reducing section is larger than the inner diameter of a channel opening of the water inlet header so that the reducing section can serve as an expansion plug part to be expanded in the channel opening. The outer diameter of the non-variable-diameter section is equal to the inner diameter of a lining pipe of the double-layer pipe bundle so that the non-variable-diameter section can serve as a blocking part to be inserted into a pipe opening of the lining pipe. The utility model provides a pipe plugging assembly and an air-dry-cooling radiator pipe bundle plugging structure, which can thoroughly solve the problem of pipe plugging after leakage of an air-dry-cooling radiator pipe bundle, thereby avoiding the defect of repeated pipe plugging caused by aging of plug parts after the pipe bundle is plugged, reducing the pipe plugging cost and ensuring the pipe plugging effect.