9946 results about "Pipe fitting" patented technology

The invention discloses a steel structure welding positioning device for constructional engineering, and relates to the technical field of welding equipment, the steel structure welding positioning device comprises a welding table, the top of the welding table is provided with a rotating mechanism, and the rotating mechanism is provided with a welding fixing assembly. The upper surface and the lower surface of the steel structure pipe fitting are clamped through the welding clamping plate, the auxiliary clamping plate makes contact with the side face of the steel structure pipe fitting, the steel structure pipe fitting is pushed to the center position of the upper surface of the welding clamping plate, and the steel structure pipe fitting can be centralized and positioned; meanwhile, the side face of the steel structure pipe fitting can be fixed, the four faces of the steel structure pipe fitting can be supported and limited in cooperation with welding clamping plates, a transmission screw can drive a moving block to move along the transmission screw, and at the moment, the moving block can drive an inner clamping block to move; and the inner clamping blocks move to make contact with the inner wall of the steel pipe and extrude the inner wall of the steel pipe, so that the inner wall of the pipe fitting is fixed, and the stability in the steel structure welding process is improved.

The invention discloses a method and tool for manufacturing a cold shield of a nuclear fusion device, and relates to the technical field of metal plate machining. The manufacturing method of the cold shield of the nuclear fusion device comprises the following steps: providing a sub-panel, a flange and a pipe fitting; the multiple sub-panels are welded, and a first middleware is obtained; welding the edge of the first middleware and the turnup to obtain a second middleware; after the pipe fitting is welded to the surface of the second middleware, a third middleware is obtained; and the third middleware is shaped. According to the method, the third middleware is shaped, that is, the third middleware is shaped after all welding procedures are completed, so that the third middleware has relatively small profile tolerance, the profile tolerance of the cold shield meets the design requirement, the assembly difficulty of the cold shield is reduced, and the risk of failure of the cold shield is reduced.

The invention discloses a molybdenum-rhenium alloy pipe fitting defect identification method and system based on a high-definition microscopic image. The method comprises the following operation steps that high-definition microscopic equipment is used for collecting the high-definition image of a molybdenum-rhenium alloy pipe fitting; preprocessing the high-definition image of the molybdenum-rhenium alloy pipe fitting to obtain a molybdenum-rhenium image to be detected; performing execution processing of a region growing algorithm on the molybdenum-rhenium image to be detected to obtain a defect region to be detected; performing defect identification on the to-be-detected defect area to obtain type defects; and judging the defect problem of the molybdenum-rhenium alloy pipe fitting according to the type defect.

The invention relates to the technical field of laser cutting machines, and discloses a metal pipe separation machining laser cutting machine which comprises a workbench, two supporting strips are fixedly installed on the workbench, a supporting frame a is arranged on the two supporting strips, a laser cutting head is arranged on the supporting frame a, a supporting frame b is arranged on the two supporting strips, and a laser cutting head is arranged on the supporting frame b. A moving device is arranged on the supporting frame b, the moving device can drive a moving block to move to extrude one of the trapezoidal blocks along with movement, in this way, a pressure block can be driven by a lifting rod to move downwards to extrude and fix the cut metal pipe, and after the metal pipe is cut, the moving block leaves along with the pressure block; in this way, springback of the pressure spring can drive the lifting rod to move upwards through the lifting ring, so that the pressure block can be driven to move upwards, a user can move the steel pipe backwards to prepare lower side cutting, and the cut metal pipe can be moved to prepare lower side cutting when the laser cutting head cuts other metal pipes.

The invention discloses a device and a method for direction-selecting double-head upsetting of a saddle for a spray pipe of a driving motor of a new energy automobile. The device comprises a control system; the hopper component is used for storing to-be-machined pipe fittings, a discharging position is arranged on the hopper component, and the pipe fittings are discharged from the discharging position one by one; the material receiving component is used for receiving the pipe fittings discharged from the hopper component and moving the pipe fittings to a detection position; the rotary orientation component is used for rotating the pipe fitting to a target angle state according to the position of the spraying hole in the pipe fitting; the material waiting part is used for moving the pipe fitting rotating to the target angle state to a material waiting position; a material moving manipulator; and the stamping part is used for stamping the two ends of the pipe fitting so as to form saddle structures at the two ends of the pipe fitting. Full-process automatic operation is achieved, automatic discharging is achieved through the hopper component, pipe fittings are conveyed through the material receiving component, the angle is automatically positioned through the rotary orientation component, and compared with a traditional operation mode that angles are manually adjusted one by one, the single-piece machining time can be greatly shortened, and the productivity is remarkably improved.

The invention belongs to the technical field of image data processing, and particularly relates to a quality detection method and system for metal pipe fitting forming, and the method comprises the steps: obtaining a plurality of groups of matched gap regions of a port edge image according to the gray scale difference of the neighborhood of each gap of the port edge image in a corresponding metal pipe fitting image; obtaining a suspected defect area of the port edge image according to curvature change of edge pixel points of the port edge image; acquiring similar arc segments of each suspected defect area according to the change of the distance from the arc segment on the ellipse of the metal pipe edge image to the ellipse center; obtaining the abnormal degree of each suspected defect region according to the deformation difference between the suspected defect region and the similar arc section and the gray difference between the suspected defect region and the corresponding suspected defect region of the same group of matched gap regions; and screening to obtain a final defect area. According to the invention, the accuracy of quality forming detection of the metal pipe fitting is improved.

The invention relates to the technical field of metal pipe fitting machining, and provides elbow cold pushing equipment which comprises a rack, the rack is provided with a workbench, and a lower die is arranged on the workbench; the downward pressing mechanism is arranged on the rack in a lifting mode, an upper mold is arranged at the downward pressing end of the downward pressing mechanism, and a clamping space used for clamping an elbow is formed between the upper mold and the lower mold; the mold core is arranged in the clamping space, and the mold core, the upper mold and the lower mold form a forming space; the pushing mechanism is arranged on the rack and is adjacent to the lower mold; the pushing end of the pushing mechanism is connected with a swinging arm in a swinging mode, a supporting rod is arranged in the swinging arm in a sliding mode, and the swinging arm can drive the supporting rod and the blank to swing synchronously so that the blank can enter the clamping space. According to the technical scheme, the feeding station is arranged on one side of the axis of the pushing mechanism, so that an operator carries out feeding in a safe area on the side face of equipment and is far away from the direct movement path of the lower die and the pushing mechanism, and the potential safety hazard that the operator gets close to equipment movement parts during traditional manual feeding is avoided.

The invention relates to the technical field of welding clamps, in particular to a cabin equipment outfitting welding clamp and a clamping method thereof.The cabin equipment outfitting welding clamp comprises a guide rail, two sliding blocks capable of synchronously and oppositely moving are slidably clamped to the guide rail, a second limiting rod is arranged on the guide rail, a sliding plate is slidably clamped to the sliding blocks, and the second limiting rod is movably sleeved with the sliding plate; an elastic receding assembly is arranged between the sliding block and the sliding plate, the sliding plate can slide on the sliding block when pushed by external force through the elastic receding assembly, a sleeve arranged on the second limiting rod in a sleeving mode is embedded into the inner side of the sliding plate in a clamped mode, and the sleeve and the second limiting rod are matched through a first linkage mechanism. The sleeve rotates when sliding on the second limiting rod; according to the thin-wall fitting-out pipe fitting clamping device, radial and axial synchronous constraint of the thin-wall fitting-out pipe fitting can be achieved, the thin-wall fitting-out pipe fitting is not prone to loosening or deformation in the welding process, meanwhile, coaxial welding is kept, and the welding seam quality is improved.

Disclosed in the present invention is a flexible robot welding system for a middle rotary displacement pipe fitting. The flexible robot welding system comprises a clamp-type positioner and two welding systems located on two sides of the clamp-type positioner, wherein the clamp-type positioner comprises a driving wheel mechanism for driving pipe fitting to rotate and displace, and a clamp mechanism for pressing the pipe fitting; the clamp mechanism comprises a pressing wheel in contact with the pipe fitting, and a pressing-wheel driving device for driving the pressing wheel to ascend and descend, the pressing wheel rotating along with rotation of the pipe fitting and pressing the pipe fitting; the two welding systems are respectively located at two ends of the pipe fitting, and each welding system comprises a welding robot and an end pressing mechanism; and the end pressing mechanism comprises a pressing first roller in contact with the pipe fitting, and a roller driving device for driving the pressing first roller to ascend and descend, the pressing first roller rotating along with rotation of the pipe fitting and pressing the pipe fitting. The middle part and the two ends of the pipe fitting are pressed at the same time by means of the clamp-type positioner and the end pressing mechanism, such that straightness correction of the pipe fitting is achieved, thereby guaranteeing the welding quality.

The invention belongs to the technical field of automobile machining, and particularly relates to automobile pipe fitting welding equipment which comprises a square pipe, clamping equipment is symmetrically arranged on the two sides of the outer surface of the square pipe, processing equipment is arranged at the bottoms of the clamping equipment, and top welding equipment is arranged at the top of the square pipe. According to the device, when top welding equipment is used for welding, a welding seam below a special-shaped pipe can be ground through grinding equipment below the special-shaped pipe, so that welding slag at the welding seam of the pipe fitting is cleaned away, an adjusting base can deflect to a certain degree under the control and propelling action of an inner side propelling rod, and the welding seam can be adjusted to a certain degree. According to the grinding device, the grinding rollers are arranged, so that the grinding rollers can carry out direction-variable grinding work on the welding seam of the pipe body, the grinding force on the pipe fitting is changed by pushing the grinding rollers, fine adjustment work is carried out on different parts of the square pipe in a matched mode, the grinding effect with uniform force is achieved, and the problem that the grinding force of the square pipe is improper is avoided.

The invention discloses a welding device for automobile bent pipe fitting machining, and relates to the technical field of automobile pipe fitting machining, the welding device comprises a supporting base, a laser welding assembly and a driving mechanism used for driving the laser welding assembly to do circular motion, and a pipe fitting clamping mechanism is arranged on the supporting base; and the pipe fitting clamping mechanism comprises an elastic adaptive clamping mechanism and a straight pipe clamping mechanism. According to the device, firstly, the bent pipe fitting is centrally clamped in the vertical position through the two clamping plates, when the bent pipe fitting is clamped between the two clamping plates, the downward side of the bent pipe fitting directly extrudes the distributed sliding ejector rods, and the sliding ejector rods at different positions abut against the positions, with different curved surfaces, of the bent pipe fitting through resilience force of the corresponding supporting springs conveniently; and the lifting plate drives the other group of distributed sliding ejector rods to downwards press to the upward side of the bent pipe fitting, so that the bent pipe fitting can be conveniently clamped and positioned at positions with different curved surface degrees, the bent pipe fitting can be conveniently and stably butted with a clamped and fixed straight pipe fitting, and the welding operation can be conveniently and effectively completed.

The invention relates to the technical field of electric power construction, in particular to an auxiliary welding mechanism for electric power construction, which comprises a worktable, a mounting frame is mounted at the top end of the worktable, an air cylinder A is mounted at the top end of the mounting frame, a welding head is mounted at the output end of the air cylinder A, and a shell is arranged at the top end of the worktable. Negative pressure is generated through the suction pump, the smoke dust is efficiently collected into the collecting box through the air suction head, purified air forms an air curtain, diffusion of the smoke dust and welding slag is blocked, air is purified, a welding area is isolated, the suction force of the suction pump can further be used for driving the vibration mechanism, and therefore the smoke dust can be effectively collected. In addition, heat conduction of the welding head enables gas of the gas storage pipe to expand, suction force of the gas suction pipe and frequency of the vibration rod are automatically adjusted, welding quality and efficiency are improved, and frequent manual parameter adjustment is not needed.

The invention discloses intelligent bent pipe punch forming equipment and method, and relates to the technical field of pipe fitting punch forming, the intelligent bent pipe punch forming equipment comprises a machine body and a pipe blank, the machine body is provided with a die mechanism, a pushing mechanism and an elbow core rod provided with a first quick release assembly, and the die mechanism comprises an upper die and a lower die which are fixed to the machine body; the upper die and the lower die are respectively provided with forming runners which are matched with each other, and the tube blank is placed in the forming runner of the lower die. By arranging the pressure feedback mechanism and the lubricating oil spraying mechanism, the friction force between the pipe blank and the elbow core rod is converted into the pressure value change in the pressure detection cavity and transmitted to the piezoelectric sensor, the piezoelectric sensor feeds back the pressure value to the control unit, and the control unit can control the rotating speed of the oil pump according to the pressure value. The larger the friction force between the pipe blank and the elbow core rod is, the higher the rotating speed of the oil pump is, the more lubricating oil is sprayed out of the oil spraying holes, the intelligent degree of lubrication is improved, and the stamping effect is guaranteed.

The invention relates to the field of water guide laser cutting, in particular to air conditioner connecting pipe full-automatic machining equipment which comprises a workbench, and a three-point connecting pipe clamping device and a movable connecting pipe chuck are arranged at the top of the workbench. A two-way moving water guide laser cutting device is arranged at the position, between the three-point connecting pipe clamping device and the movable connecting pipe chuck, of the top of the workbench, a water guide groove is formed in the position, below the two-way moving water guide laser cutting device, of the top of the workbench, and the two-way moving water guide laser cutting device is driven by a two-way threaded lead screw and a first servo motor. The two sliding blocks can synchronously move in the opposite direction or the reverse direction, rapid adjustment of the distance between the lifting rollers is achieved, the device is suitable for connecting pipes with different pipe diameters, universality is high, triangular clamping is formed by the two lifting rollers and the lower pressing roller, the connecting pipes are effectively prevented from sliding or vibrating in the machining process, cutting precision and stability are ensured, and the machining efficiency is improved. The second servo motor synchronously drives the double lead screws to press downwards through belt transmission, the transverse plate drives the lower pressing roller to conduct accurate positioning, the clamping force is uniform, and deformation of the pipe fitting is avoided.

The invention relates to the technical field of heat preservation and energy conservation, and particularly discloses a system for testing the heat conductivity coefficient of a pipeline heat preservation material under an engineering meteorological environment condition, which comprises a straight pipe test piece with calibration ends fixedly mounted at two ends, and a heat preservation covering material wrapped on the outer wall of the straight pipe test piece to form a pipe fitting to be tested; the ventilation hood is positioned in the sealed space; air pipes at the output end of the air conditioning system are all located in the sealed space, and air outlets of the air conditioning system directly face the ventilation hood. By simulating multi-parameter coupling working conditions such as in-pipe medium temperature gradient, external temperature and humidity / wind speed circulation and mechanical vibration, the heat conductivity coefficient of the material is dynamically corrected, whether the heat conductivity performance of each layer of material meets the standard specification or not is verified, and the rationality of the composite structure is quantitatively evaluated based on a thermal resistance network model. Data support is provided for optimizing the heat preservation layer combination mode and thickness design, and the problem of design deviation caused by the fact that a traditional method cannot reflect actual engineering working conditions is solved.

The invention is suitable for the technical field of polishing treatment, and provides a metal pipe fitting groove pre-welding fine polishing treatment device which comprises a positioning assembly, a rotating assembly installed in the positioning assembly and an adjusting assembly connected to one end of the rotating assembly, and the rotating assembly is used for driving the adjusting assembly to rotate. The adjusting assembly is used for polishing the end of a metal pipe fitting, the positioning assembly comprises a workbench, two box bodies are symmetrically connected to the top of the workbench, and a three-jaw chuck is arranged on the side wall of one of the box bodies. According to the device, a U-shaped base and a telescopic air cylinder are arranged, a bearing plate is driven to drive a chamfering mechanism to move, a scraper walks and conducts machining according to the shape of the end of a pipe fitting, and the requirement for machining of grooves of different shapes is met.

The invention discloses a full-automatic cold pilger mill, and relates to the technical field of cold pilger mills, the full-automatic cold pilger mill comprises a case and a cold rolling assembly arranged in the case and used for rolling pipe fittings, the case is internally provided with a driving assembly used for driving the cold rolling assembly to work, and the full-automatic cold pilger mill further comprises a water cooling assembly arranged in the case and used for cooling the rolled pipe fittings; the water cooling assembly comprises a water spraying pipe movably connected into the machine box, a telescopic pipe is movably connected into the water spraying pipe, the telescopic pipe and the cold rolling assembly are connected through a fixing base, the characteristic that the machine frame reciprocates left and right is utilized, a cooling liquid outlet moves from right to left, and therefore the spraying range of pipe fittings is enlarged, and the spraying efficiency is improved. Meanwhile, the cooling liquid can be sprayed on the surface of the pipe fitting from the periphery, so that the spraying range of the cooling liquid on the surface of the pipe fitting is further expanded, the surface of the pipe fitting is cooled uniformly, the spraying of the cooling liquid is free of omission and dead angles, the cooling effect of pipe fitting rolling is ensured, and the cold rolling quality of the pipe fitting is ensured.

The invention relates to the technical field of pipe fitting welding tools, in particular to a groove cleanable stainless steel pipe fitting welding tool which comprises a supporting assembly, a clamping assembly movably arranged on one side of the supporting assembly, an adjusting assembly arranged on one side of a clamping plate, a grinding assembly movably arranged on one side of a detection assembly, and the detection assembly arranged on one side of the supporting assembly. The rotating assembly is arranged on one side of the detection assembly. According to the pipe fitting groove polishing device, the pipe fitting is clamped through the clamping assembly, the rotating disc drives the polishing piece to rotate, meanwhile, the electric push rod stretches out and draws back in a matched mode, the polishing piece is attached to a pipe fitting groove with uniform force for polishing, and welding quality reduction caused by excessive polishing or incomplete polishing is avoided; through cooperation of the pressure sensor and the displacement sensor, the clamping angle of the pipe fitting is detected, the angle of the pipe fitting is automatically calibrated, two pipe fitting grooves are spliced at a fixed angle, manual supporting and fixing are replaced, and the welding precision of the pipe fitting is improved.

The invention relates to the technical field of quenching, and particularly discloses a quenching device and method for stainless steel pipe machining. The quenching device comprises a bottom box, a quenching box is fixedly installed above the bottom box, one side of the quenching box is open and provided with a sealing door, the sealing door is movably connected with the quenching box, and the end, close to the quenching box, of the bottom of the sealing door is connected with a base; a turntable is rotationally mounted on the base, a plurality of fixing cones are arranged around the top of the turntable, and a to-be-quenched pipe fitting is sleeved on the fixing cones. Through the arrangement of the outer ring and the inner ring, synchronous fixing of a plurality of pipe fittings is achieved, rotation of the driving disc pushes the extrusion pieces to evenly expand outwards along the sliding grooves, and the extrusion pieces can be reset in combination with the elasticity of the springs; through sliding constraint of the limiting blocks and the limiting grooves, it is guaranteed that deviation does not occur in the extrusion process, the outer ring provides reverse supporting to form clamping force, the clamping safety of the thin-wall pipe fitting is remarkably improved through the design, and the device is particularly suitable for quenching of stainless steel pipes prone to deformation.

Fire protection systems and methods having piping interconnections for connecting a fire protection device to a fluid source. The piping interconnections include a branch connector connected to a pipe header. The branch connector includes a tubular member and an internal annular seal member housed in an internal gasket chamber of the tubular member. The tubular member includes an internal stepless surface between a terminal end of the tubular member and the internal gasket chamber.

The invention discloses a precision pipe fitting machining device and method, and relates to the technical field of precision pipe fitting machining. The controller is mounted on the surface of one side of the machine tool main body; the supporting mechanism is mounted at the top of the machine tool main body and is used for supporting a machined pipe fitting; the machining mechanism is connected with the machine tool body and used for machining the outer wall of the pipe fitting; the first clamping mechanism is mounted at one end of the machine tool main body and is used for fixing the front end of the pipe fitting; according to the precise pipe fitting machining device and method, by optimizing a clamping and supporting mechanism, the problem of bending deformation caused by self weight in the pipe fitting machining process is effectively solved, when the positioning base moves, the first spring automatically adjusts the positions of the sliding frame and the lifting frame, it is ensured that the sliding frame and the lifting frame are evenly distributed at different positions of the pipe fitting, and the machining precision is improved. And the bottoms of the pipe fittings are uniformly supported through the supporting blocks and the supporting rods at the tops of the lifting frames, downward bending deformation of the pipe fittings due to self weight is avoided, and the machining precision is improved.

The invention discloses a cutting device for a trolley frame and a production system of the cutting device, and relates to the technical field of laser cutting equipment.The cutting device comprises a clamping disc, a cutting head, a core rod and a transferring assembly; one end of the core rod is used for being inserted into a pipe fitting to do reciprocating motion, the core rod is coaxially sleeved with the slag scraping ring, the multiple separation nozzles are distributed around the core rod in the circumferential direction at intervals, a cooling channel is formed in the core rod, one end of the cooling channel communicates with the separation nozzles, and the other end of the cooling channel communicates with the separation nozzles. The slag scraping ring comprises a contact part with a soft outer ring, and can axially swing back and forth relative to the core rod; when the core rod extends into the pipe, the contact part swings in the direction close to the separation spray head and drives the opening of the separation spray head to horizontally face the direction deviating from the clamping disc; and when the core rod retreats from the interior of the pipe, the contact part swings in the direction away from the separation nozzle and drives the opening of the separation nozzle to outwards face the radial direction of the core rod. The aluminum alloy pipe fitting cutting device has the effect of improving the aluminum alloy pipe fitting cutting efficiency.

The invention discloses a heat supply pipeline welding seam detection device, and relates to the technical field of heat supply pipeline processing, the heat supply pipeline welding seam detection device comprises a transmission mechanism 1 and a detection bin, the transmission mechanism 1 is provided with an inverted U-shaped support, the bottom wall of the horizontal section of the inverted U-shaped support is slidably connected with magnetization members in a front-back symmetrical manner, and the inverted U-shaped support is provided with a clamping member and a pretreatment mechanism; a detection bin is arranged on the left side of the first conveying mechanism, and a transferring mechanism, a marking mechanism and a second conveying mechanism are arranged on the detection bin. Through cooperation of the driving assembly and the brushing assembly, the outer wall of the to-be-detected pipe fitting is brushed, the situation that magnetic powder, oxide skin, burrs and the like adhere to the surface of the pipe fitting, the magnetic powder gathering phenomenon caused by non-defect factors is caused, and misjudgment occurs in the detection process is avoided, through cooperation of the driving assembly and the flushing assembly, the pipe fitting is flushed, and the detection efficiency is improved. The scraped impurities are prevented from being attached to the outer wall of the to-be-detected pipe fitting, and meanwhile, the pre-wetting treatment can be carried out, so that the fluorescent magnetic suspension is helped to cover the surface of the pipe fitting more uniformly.

The invention provides an operation monitoring method for a steam pipe network. The operation monitoring method comprises the following steps: acquiring pipeline burial depth information, a leakage signal, temperature, pressure and soil thermal conductivity change information of an underground steam pipe network; constructing a pipe network space model, marking pipe fitting positions, obtaining soil types, and calculating attenuation coefficients of leakage signals in different soil media; simulating a leakage signal propagation path based on a pipe network space model, obtaining a complex area of a pipe network structure according to the pipe burial depth information, and if the leakage signal is superposed or interfered in the complex area, separating out an independent signal component to obtain an initial propagation direction of the leakage signal; according to the position of the leakage point, in combination with the pipeline burial depth and the soil type attribute, a regression analysis method is adopted to calculate the quantitative relation between the intensity of the leakage signal and the leakage degree, and an evaluation result of the leakage degree is obtained.

The utility model discloses a pipe fitting clamping mechanism, and particularly relates to the technical field of pipeline processing, the pipe fitting clamping mechanism comprises a supporting seat, a screw rod I is rotatably mounted in the supporting seat, one end of the screw rod I is connected with a hand crank outside the supporting seat, the outer side of the screw rod I is sleeved with a sliding seat in threaded connection, and the sliding seat is located on the inner side of the supporting seat; a connecting plate is arranged at the top of the sliding seat, and the connecting plate is connected with the sliding seat through a connecting assembly. Through the clamping mechanism, a bevel gear II can be driven by a motor so as to drive a double-sided gear ring to rotate, so that a plurality of bevel gears I are driven by the double-sided gear ring to drive threaded cylinders to rotate, and a plurality of threaded cylinders are driven to drive clamping plates to move; the pipeline clamping device can be suitable for clamping and fixing pipelines with different specifications and diameters, the application range is wider, and the practicability is higher; through the connecting assembly, the clamping seat and other parts connected with the clamping seat can be conveniently and integrally disassembled, and the clamping seat and the other parts can be conveniently disassembled, maintained or replaced.

The utility model discloses a pipe fitting cutting device for preparing a circular pipe truss, which comprises a support frame, a support table top is arranged at the upper end of the support frame, pipe fitting clamping seats are arranged on the two sides of the upper end of the support table top, each pipe fitting clamping seat comprises a lower support, an upper support frame, a side support frame and a locking seat, the upper support frame is hinged to the upper end of the lower support frame, and the side support frame is hinged to the lower end of the upper support frame. According to the pipe fitting cutting device, through cooperation of the upper supporting frame and the lower support and use of the upper pressing base, stability of a pipe fitting in the cutting process is guaranteed, cutting deviation caused by movement of the pipe fitting is avoided, the cutting precision is remarkably improved, and the cutting efficiency is improved. And through cooperative work of the moving set, the adjusting set and the cutting-off set, it is guaranteed that the pipe cutter accurately cuts the pipe. And through automatic control of the driving air cylinder and the lifting adjusting air cylinder, the manual adjusting time is shortened, and the continuity and speed of cutting operation are improved.

The invention relates to the technical field of flame cutting machine tools, in particular to an anti-splashing automatic flame cutting device which comprises a cutting table, and a pipe conveying assembly and a pipe output assembly are symmetrically installed at the top end of the cutting table. According to the anti-splashing automatic flame cutting device, a band-type brake stepping motor drives a rotating shaft to rotate, so that a plurality of auxiliary rollers and driving rollers which are arranged in a cavity ring in a surrounding mode at equal angles synchronously rotate, a polishing abrasive belt is driven to synchronously rotate, and therefore the to-be-cut face of a pipe fitting can be comprehensively wrapped and effectively and automatically polished and derusted; the whole cutting quality is guaranteed, subsequent machining and using are prevented from being affected, meanwhile, a limiting gear ring can drive a plurality of abutting blocks on the side edge to rotate synchronously when rotating, and therefore the roller rods are abutted against and make reciprocating motion, and the cutting efficiency is improved. And meanwhile, when the roller rod reciprocates, a certain amount of rust remover in the liquid storage tank can be intermittently sprayed out of the spray head to be sprayed on the surface of the running polishing abrasive belt, the polishing and rust removing effect is improved, and efficiency is improved.

The invention relates to the technical field of sampling equipment, and discloses sampling equipment for surface water monitoring, the sampling equipment comprises a sampling barrel, a pipe fitting, two piston plates, a plurality of barrier plates and a plurality of plugging assemblies, the pipe fitting is fixedly connected to the middle part in the sampling barrel along the vertical direction, the two piston plates are movably connected in the pipe fitting, the upper surface of the higher piston plate is connected with a rod body, and the upper surface of the lower piston plate is connected with a plurality of baffle plates; the rod body slides on the inner wall of the pipe fitting, the upper end of the rod body is connected with a driving piece used for driving the piston plate to vertically move, the multiple blocking plates block the cavity into multiple water storage cavities used for storing water, and water inlet holes are formed in the positions, corresponding to the water storage cavities, of the pipe fitting and located below the corresponding adjacent blocking plates. A water inlet pipe communicated with the outside of the sampling barrel is transversely connected to the side, located at the water inlet hole, of the pipe fitting, the multiple plugging assemblies are arranged in the water storage cavities respectively, and each plugging assembly comprises an annular floating plate and a plugging piece connected to the floating plate. The device can realize underwater multi-position classified sampling, and the whole sampling process is high in efficiency and high in speed.

The invention relates to the field of pipe fitting welding, and discloses a welding device suitable for welding thick-wall pipe fittings, the welding device comprises a rack, two thick pipes needing to be welded are installed in the rack, symmetrical vertical sliding frames are fixedly connected to the top surface of the rack, and the welding device further comprises a welding machine mechanism, a soaking mechanism and a supporting mechanism. When the two thick pipes are welded together, firstly, the soaking mechanism and the supporting mechanism are placed in the two thick pipes, the soaking mechanism is located at the joint of the two thick pipes, then the supporting mechanism supports the two thick pipes from the interior, and after the two sides of the top face of the flexible soaking plate make contact with the inner circumferential faces of the thick pipes, the welding device is controlled to conduct welding. And meanwhile, the driving roller starts to rotate slowly to drive the two thick pipes to rotate, so that the welding device welds the two thick pipes together, as the flexible vapor chamber abuts against the inner circumferential surfaces of the thick pipes, a molten pool at the welding position is supported from the bottom and does not flow downwards along a welding seam, and the problem that the quality of a welding point is poor is avoided.

A clamping and positioning tool for assembling fire-fighting pipelines and pipe fittings relates to the technical field of pipe fitting clamping tools and comprises a clamping workbench, the clamping workbench is a horizontally-arranged square table, and a sliding clamping assembly, a swing assembling assembly, a steering adjusting assembly and a screwing driving assembly are arranged on the clamping workbench; a sliding communication opening extending transversely is formed in the middle of the upper surface of the clamping workbench, two symmetrical strip-shaped limiting grooves are formed in the upper surface of the clamping workbench in the transverse direction, and the two strip-shaped limiting grooves are formed in the two sides of the sliding communication opening respectively. According to the clamping tool, the problems that in the assembling and clamping process of a fire-fighting pipeline system, a single clamping mode is difficult to adapt to clamping and positioning of various pipe fittings, the clamping difficulty is increased due to diversified assembling modes, and the pipe fittings are inconvenient to adjust in the assembling and connecting process in a clamping tool in the traditional technology are solved.