103 results about "Narrow gap" patented technology

The invention provides a narrow gap swing laser welding pool wettability prediction method based on CFD simulation. The method comprises the following steps that an interaction platform is constructed through Python + PyQt5, and geometric modeling, UDF compiling and a material library module are integrated; the groove parameters and the swing track are dynamically loaded to a Fluent solver, and a full-coupling transient model of a steam recoil pressure-buoyancy-molten drop mass source item is established; in CFD-POST, the widest section of the molten pool is positioned on the basis of the contour surface with the volume fraction being 0.5, and Z-direction displacement-flow velocity data are extracted along the two side wall surfaces; fusing defects are predicted through double criteria of a bilateral average flow velocity difference threshold value and F test variance homogeneity; according to the method, dynamic quantitative evaluation of wetting behaviors can be achieved, the process development period is shortened, the defect detection rate is increased, and the method is suitable for aerospace thick plate welding quality control.

The present invention relates to the technical field of boiler manufacturing, and provides a weld seam structure suitable for a narrow gap water-cooled wall tube panel and a welding process. The weld seam structure comprises groove gaps formed between adjacent water-cooled wall tubes; joints are provided on the sides of the adjacent water-cooled wall tubes close to each other; the joints are distributed on the upper sides of the groove gaps, and the joints are communicated with the groove gaps; and the groove gaps comprise V-shaped grooves or U-shaped grooves. In addition to the original joints, adjacent water-cooled wall tubes are considered as a whole, and gaps formed between the water-cooled wall tubes are machined into groove gaps and welded with the joints, thereby increasing the thickness of a welding seam at a tangent point and the safety coefficient, facilitating ray radiographic inspection, and solving the technical problem of great hazards to the safe operation of units due to the fact that when the gaps between the adjacent water-cooled wall tubes are small, the welding quality at the tangent point position of the adjacent water-cooled wall tubes cannot be effectively guaranteed due to inconvenient observation, welding, and radiographic inspection.

According to the double-laser-assisted MIG arc horizontal position welding method and device, through asymmetric narrow gap groove design (a3gt, a1gt and a2), the angle of an upper side groove is slightly larger than that of a lower side groove, the laser irradiation effect of an upper side wall can be improved, it is guaranteed that the upper side groove can be fully covered with laser and an arc, and the tendency of incomplete fusion defects is reduced; and meanwhile, the lasers are arranged in an asymmetric form, auxiliary lasers are obliquely emitted to the upper side wall of the groove from bottom to top to form an auxiliary laser molten pool, the height (d4) of the molten pool is widened, the problem that the molten pool on the upper side wall is prone to incomplete fusion under the action of gravity during horizontal welding of traditional laser-arc hybrid welding can be effectively solved, and the welding quality is improved.

The invention relates to the technical field of rolling mills, in particular to a rolling mill roller parallelism fast adjusting device which comprises a bottom plate, a vertical plate and a main transmission mechanism, the output end of the main transmission mechanism is in meshed connection with a working roller and a supporting roller which are vertically distributed, and the supporting roller penetrates through the vertical plate and extends to the two sides of the vertical plate. The positions, corresponding to the vertical plates, of the working rollers and the supporting rollers are sleeved with bearings, the section width of the bearings is larger than the thickness of the vertical plates, guide grooves are formed in the vertical plates, and hydraulic mechanisms are fixedly installed at the upper ends of the guide grooves. The sharp-angle tip of the trapezoidal feeler gauge can be easily inserted into a narrow gap between the two cylindrical bearings, accurate positioning can be achieved, stable supporting can be applied to the supporting roller, and the supporting roller can be accurately positioned under the condition of not depending on the hand feeling of an operator by being matched with the fine-adjustable working roller hydraulic lifting mechanism. Standardized and quantitative measurement and comparison are carried out on the gap between the two ends of the roller, so that a direct and reliable basis is provided for quickly and accurately adjusting the parallelism.

This invention discloses a barbed locking type large-diameter thin-walled reinsertion pipe and its application method, belonging to the field of wellbore stimulation technology for old wells in low-permeability oil and gas fields. It includes, from top to bottom, a reinsertion pipe, an expansion anchor, a C-ring cone, a C-ring, a sealing ring, a return sleeve, and a 4-1 / 2" casing. During use, the return sleeve forms a seal with the inner diameter of the 4-1 / 2" casing. During the insertion of the reinsertion pipe into the return sleeve, the expansion anchor presses down on the C-ring cone, which in turn presses down on the sealing ring. The sealing ring, under pressure, generates radial extrusion force, causing it to squeeze the inner wall of the 5-1 / 2" old wellbore casing, thus achieving a seal. This invention is applicable to fracturing operations in complex well conditions such as old well repair, wellbore reconstruction, and narrow-gap wellbore completion.

The utility model discloses a pair of locking pliers for a reinforcing steel bar extrusion connecting joint in a narrow space, which comprises two force arm connecting seats, two force arms are symmetrically arranged between the two force arm connecting seats, one ends of the two force arms are connected with a bidirectional telescopic hydraulic cylinder, and the other ends of the two force arms are provided with a pressing module. The pressing module comprises two half cylinders, the two half cylinders are arranged on the opposite sides of the two force arms respectively, and protruding arc-shaped teeth are arranged on the inner walls of the half cylinders. Through the lever principle, extrusion force is large, extrusion passes are few, a jaw is small, and convenience and flexibility are achieved; the device is suitable for steel bar connection operation in space-limited environments such as narrow gaps in construction sites and difficult-to-touch areas such as the bottoms of bridges, manual operation difficulty is reduced, construction safety is improved, rapid clamping and releasing are achieved through two-way stretching and retracting of the hydraulic cylinders, construction efficiency is improved, and construction safety is improved. Due to the design of the pressing module, it is ensured that the rebar joints are evenly and effectively extruded, and the connection strength is improved.

The invention discloses a remote jet fire extinguishing device for an unmanned aerial vehicle, and belongs to the field of unmanned aerial vehicles, the remote jet fire extinguishing device comprises the unmanned aerial vehicle, the unmanned aerial vehicle is provided with a protection piece replacement mechanism, the unmanned aerial vehicle comprises a first fuselage, a first mounting plate is rotatably arranged at the bottom of the first fuselage, and a first jet pipe and a second jet pipe with adjustable spacing are detachably mounted on the first mounting plate; the protection piece replacement mechanism comprises a box body, the box body is fixed to the unmanned aerial vehicle, a sealing door is rotatably arranged on the box body, a camera is detachably installed in the box body, a storage area and a storage area are arranged in the box body and located above and below the camera, a first baffle is slidably arranged on the storage area, and a second baffle is slidably arranged in the storage area. Movement can be achieved through the propellers of the unmanned aerial vehicle, when the distance between buildings is too small, the included angle of the multiple rotating arms is rotationally adjusted, the size of the unmanned aerial vehicle is changed, and the four sets of walking wheels are attached to the walls of the two sides defining the slit correspondingly, so that the unmanned aerial vehicle can walk in the slit and move to the position close to a fire source.

This utility model relates to the technical field of fluid heat transfer experimental equipment, and provides a narrow-slit annular flow channel experimental device, including: an adjustable narrow-slit flow channel module, a cold water circulation system, and a hot water circulation system; the adjustable narrow-slit flow channel module includes: multiple sets of experimental flow channels; each experimental flow channel includes: an outer tube and an inner tube arranged concentrically; a narrow slit is formed between the outer tube and the inner tube; the inner tube diameters of different experimental flow channels are different; a cold water inlet is provided at one end of the outer tube, and a cold water outlet is provided at the other end; the cold water inlet and cold water outlet are connected to the cold water circulation system; a hot water inlet is provided at one end of the inner tube, and a hot water outlet is provided at the other end; the hot water inlet and hot water outlet are connected to the hot water circulation system. This utility model meets the comparative experimental needs of flow channels with different gaps and different materials, and can study the fluid resistance and heat transfer characteristics under different conditions, providing rich experimental data for related research.

A flip-type multi-axis narrow-gap welding workstation and welding method, belonging to the field of welding technology, includes a flip-type base with a clamping mechanism rotatably mounted on it. The clamping mechanism includes a support platform, with a first clamping unit and a clamping base movably mounted at both ends of the support platform. Several second clamping units are movably mounted on both sides of the central axis along the length direction of the support platform, and two crossbeams are symmetrically fixed on both sides of the central axis along the length direction of the support platform. The crossbeams are located outside the second clamping units, and each crossbeam is equipped with a corresponding narrow-gap welding mechanism that moves along three axes. The multi-directional clamping units, in conjunction with the support platform, reliably clamp thick plate workpieces, flipping them from a flat welding posture to a vertical or near-vertical welding state. The molten pool formation is stable, and the use of a narrow-gap welding torch significantly reduces the amount of filler metal used in the weld, lowers the welding heat input, suppresses plate deformation and residual stress, and saves welding wire and welding time.

The invention provides a heat treatment method for narrow-interval welding seams of a pipeline, and belongs to the technical field of metal material welding heat treatment. The method comprises the steps that the interval between every two adjacent welding seams and the diameter and thickness of the pipeline are measured; performing hardness detection on the two welding seams, the base metal around the welding seams and the base metal in the middle area of the two welding seams; arranging a thermocouple at the hardness detection position; the two welding seams and the adjacent areas of the two welding seams are wrapped with heating pieces correspondingly; heat preservation pieces are arranged on the surface of each heating piece, the area where the heating pieces are not arranged between the two weld joints and the area where the two heating pieces deviate from each other; setting heat treatment time and temperature for heat treatment according to pipeline wall thickness and hardness detection results; and detecting the weld hardness after heat treatment to finish heat treatment. According to the method, through division of the areas of the two welding seams, hardness detection, thermocouple arrangement and heat preservation cotton arrangement, on-site simultaneous heat treatment of the two welding seams with the small distance is achieved, the heat treatment standard requirement is met, meanwhile, time can be saved, and damage to materials is avoided.

The utility model relates to a device for adjusting coaxiality in a narrow space, and belongs to the technical field of couplings. According to the utility model, the coaxial adjusting bracket is additionally arranged outside the coupling between the encoder and the motor shaft, and the coaxial adjusting bracket comprises the two detachable and spliced rotary bodies, so that the coaxiality among the coupling, the encoder and the motor shaft can be adjusted and corrected by adjusting the gap between the two rotary bodies; the coaxiality adjusting device is small in occupied space, can adapt to coaxiality adjustment in a narrow gap, overcomes the defect that a dial indicator cannot be installed, can accurately control coaxiality deviation, is convenient and fast to disassemble after adjustment, is light in overall structure, can perform adjustment operation only through an adjusting bolt, and improves the work efficiency of coaxiality adjustment.

To efficiently perform sound welding by suppressing weld defects while suppressing a welding amount and preventing the occurrence of high temperature cracks in flat position welding.SOLUTION: In a narrow groove 50 of horizontal welding, a lower groove angle θ on a lower plate 5A side is set to 35 ° to 45 ° upward from the horizontal, and an upper groove angle α is set to be larger than the lower groove angle θ in a range of 2 ° to 5 °. In the inclined narrow groove welding method, a root gap RG of a narrow groove 50 is set in a range of 9 mm-12 mm, a backing metal 6 is provided which is attached to a lower plate 5A and an upper plate 5B and positions a groove surface lower end part 5A of the upper plate 5B and sets a groove angle and the root gap RG, a contact tip having a wire hole for feeding a weld wire into the narrow groove 50 is inserted, and the lower plate 5A and the upper plate 5B are welded without rotating the contact tip around a nozzle shaft in one pass in the narrow groove 50.SELECTED DRAWING: Figure 3

The utility model discloses a high accuracy gap measuring instrument, including first calliper, second calliper and measuring head, the first calliper top is equipped with the second calliper of symmetrical structure, and first calliper and second calliper right -hand end are rotated and are connected through the connecting ear, first calliper and second calliper left -hand end all are equipped with the measuring head of integral type structure. The utility model installs the screw micrometer measuring device on the handle in the mode of rotation, and the intersection point of two measuring heads and the connecting ear are in the same horizontal straight line, and two measuring heads are conical structure, and cooperate the tangent design of staggered up and down, can go into the narrow gap or adhere to the arc surface, are applicable to the gap measurement under a variety of complex working conditions, overcome the defect that traditional plug gauge is strong in rigidity, and the poor adaptability, is equipped with the spring between two handles, and through the kneading of two handles, can realize two measuring heads stagger and measure the space, realizes automatic reset after measuring, simple operation and high measuring accuracy.

The invention relates to the technical field of injection molds, and discloses a multi-station steel-plastic material injection mold which comprises a fixed mold, the fixed mold is in sliding fit with a movable mold through an external guide mechanism, and the multi-station steel-plastic material injection mold adopts the integrated design of station conversion, posture compensation and flexible driving. On one hand, by means of the multi-station layout that the outer ring gear ring drives the female die to be distributed in the circumferential direction and in cooperation with the posture compensation function brought by the planetary gear pair, the female die is always kept parallel and aligned with the male die in the station conversion process, and the machining precision of the female die is greatly improved; and after each time of conversion, the die can be accurately positioned to a preset feeding and discharging station, so that an operator does not need to repeatedly move in a narrow gap between the fixed die and the movable die to find cavities of different stations, and steel part filling or plastic part unloading can be carried out on the female die rotating to the position only in a fixed feeding and discharging area.

The invention discloses a magnetic control narrow-gap horizontal position welding process based on welding wire arc synchronous swing and a control method, and relates to the field of automatic welding. The magnetic control narrow-gap horizontal position welding process comprises the following steps that an alternating magnetic field driven by a magnetic control power source is used for controlling an arc to swing, and alternating current output by a vibration power source is synchronously used for driving a vibration coil to generate the alternating magnetic field; the alternating magnetic field interacts with a bias magnetic field formed by a permanent magnet fixed to the wire feeding pipe, and periodic electromagnetic force is generated to control the welding wire to swing directionally. The oscillation frequency of the output current of the magnetic control power supply is consistent with the oscillation frequency of the current of the electromagnetic force driving power supply, and the phases of the two are synchronous; by adjusting the pulse width duty ratio of positive and negative half waves of the alternating current, the retention time of the arc on the groove wall on the upper side is longer than that on the lower side; according to the horizontal position welding process and the control method, high-precision and high-repeatability control over the swing amplitude is further achieved.

The invention discloses a narrow gap automatic welding and manual welding device which comprises a welding mechanism, a clamping and fixing mechanism, a surrounding mechanism and a fixing mechanism, the welding mechanism is detachably connected to the clamping and fixing mechanism and used for welding a pipeline, the clamping and fixing mechanism is fixedly connected to the surrounding mechanism and used for clamping and fixing the welding mechanism, and the surrounding mechanism is used for surrounding the welding mechanism. The surrounding mechanism is fixedly connected to the fixing mechanism and used for driving the welding mechanism to rotate around the pipeline, and the fixing mechanism is detachably connected to the pipeline and used for supporting the surrounding mechanism. The narrow-gap automatic welding and manual welding device provided by the invention can be used for effectively welding a narrow-gap pipeline, and can be used for automatic welding and manual welding, so that the labor intensity of welders is reduced, the welding efficiency is improved, and the construction period is shortened.

The invention discloses a servo filling device and method for a powder metallurgy press, and relates to the field of preparation of automobile shock absorber pistons, and the servo filling device is characterized by comprising a rack, a powder feeding mechanism, a servo control mechanism and a pushing support mechanism. The servo control mechanism drives the discharging head to move to the position above the female die cavity and execute horizontal reciprocating micro-motion shaking, the powder bridging effect is damaged through inertia shearing force, narrow gaps are forcibly filled with powder, and the problems of insufficient filling and uneven density are solved. The pushing support mechanism synchronously moves along with the sliding block and applies vertical pressing force to the discharging head, and decoupling of horizontal driving and vertical pressing is achieved. It is ensured that the discharging head is always attached to the workbench through flexible attaching pressure during high-frequency shaking, inertia run-out is effectively overcome, and the density consistency of green bodies and the piece weight precision of products are remarkably improved while dynamic sealing performance is ensured and powder splashing is eradicated.

The high-precision intelligent screwdriver comprises a sleeve, a mounting frame is arranged in the sleeve in a sliding mode, rotating shafts are rotationally arranged on the two sides of the interior of the mounting frame, a first magnet is fixedly arranged in the middle of the outer surface of one side of each rotating shaft, and a second magnet is arranged below the first magnet. A second magnet is fixedly connected with the mounting frame, a mounting base is fixedly arranged between the rotating shafts, two dampers and a first spring are fixedly arranged in the mounting base, and a first gear is rotationally arranged at the end, located in the sleeve, of the mounting base. The use mode of the device can be changed by changing the positions of the mounting frame and related components thereof, so that the hands of a worker can be prevented from being extruded for a long time, the adaptability of the screwdriver can be improved, and the screwdriver can enter some narrow gaps for operation.

The invention provides a resistance roll welding device and application thereof, the core of the resistance roll welding device is that a split type design roll welding wheel assembly is adopted, the upper rim of an upper roll welding wheel is provided with unique pressing sheets arranged in a piano key mode, and the pressing sheets and adjacent grooves jointly form a concave-convex structure capable of rotating along with the upper roll welding wheel. The concave-convex structure and the fixedly-arranged spring ejector pin assembly have a synergistic effect, in the rotating process of the upper roll welding wheel, the end of the ejector pin is always kept in contact with the concave-convex structure, an electric contact at the tail of the ejector pin can be driven to make contact with or be separated from an electrifying terminal through axial displacement, and therefore precise programmed control over welding current is achieved. When the resistance roll welding device is applied to stitch welding of the multi-layer extremely-narrow-spacing thin plate girth, the device can effectively stretch into a narrow gap, accurate pressure application to an independent area is achieved, the technical bottleneck of welding of the multi-layer extremely-narrow-spacing thin plate girth is thoroughly broken through, and the welding efficiency is improved. And the welding quality, the process precision, the production efficiency and the reliability are remarkably improved.

The utility model relates to a centering device technical field especially a kind of plush cloth roll envelope centering device, including two symmetrically arranged mounting racks, two the inner wall of mounting rack is respectively up and down structure rotationally connected with two conveying rollers, conveying roller outer wall is all equipped with conveying belt, conveying belt is all equipped with transmission shaft in, conveying roller is driven connection with transmission shaft by conveying belt, the end of transmission shaft is rotatably connected with fixed frame, multiple fixed plates are fixedly connected between two the mounting racks, the outer wall of fixed plate is all fixedly connected with multiple support frames, rotatably connected with cylinder between two the support frames, the output end of cylinder is rotatably connected with connecting shaft, the both ends of connecting shaft are all fixedly connected with support plate.The utility model among them device, the setting of cylinder, fixed frame and conveying belt, by cylinder drive realizes the active expansion and shrinkage of up and down conveying belt gap, adjust wide gap when threading, solve the problem of difficult threading of narrow gap, avoid cloth jam.

This invention discloses a screw removal and installation device and method for narrow gaps, including a door body with a groove inside. A guide rail platform is installed on one side of the door body, and a positioning mechanism is installed on the other side. A flipping mechanism is installed on the guide rail platform, and a screw removal and installation mechanism is installed on the flipping mechanism. The screw removal and installation mechanism is located in the groove. A positioning block is installed on the bottom surface of the groove, and a feeding mechanism is installed on the top surface of the groove. This invention uses a positioning mechanism that allows operation with the equipment back panel as a reference plane, effectively solving the positioning problem caused by the non-parallelism between the wall and the electrical cabinet, and significantly improving the accuracy and efficiency of operation. The feeding mechanism enables automatic feeding, eliminating the need for manual operation and improving the convenience and efficiency of operation. The screwdriver head can tilt within a certain angle, automatically aligning with the screw head, effectively avoiding misalignment errors that could prevent removal or screw damage, thus improving the success rate of operation and the maintainability of the equipment.

The invention provides a gas auxiliary device and laser welding equipment and method, and relates to the technical field of laser welding, a flat main body is provided with a first gas channel, a second gas channel, a third gas channel and a fourth gas channel, and functional gas is introduced into the first gas channel, the second gas channel, the third gas channel and the fourth gas channel respectively; a welding bead, a molten pool and a laser light path in laser welding are synergistically protected by various functional gases, wherein the first gas channel is used for protecting and cooling the high-temperature welding bead; the second gas channel ensures that a molten pool area is protected by stable gas, and the third gas channel accurately inhibits plasma plume generated by laser welding; the fourth gas channel can continuously remove metal vapor and dust in a laser optical path; the multi-channel synergistic effect finally solves the problems of protection gas failure, plasma interference and light path pollution in a narrow gap environment, and the stability of the high-power laser penetration fusion welding process and the welding seam forming quality are remarkably improved.

The invention provides a tracking device applied to narrow-gap submerged-arc welding equipment, and relates to the technical field of submerged-arc welding equipment.The tracking device comprises a guide frame, a left positioning assembly and a right positioning assembly are arranged on the guide frame, and the left positioning assembly and the right positioning assembly each comprise a positioning claw, a torsional elastic piece and a multi-circle potentiometer; the top end of the positioning claw is fixedly connected with the bottom end of the positioning shaft; a positioning claw synchronizing wheel is coaxially arranged on the positioning shaft; one end of the torsional elastic piece is fixedly connected with the positioning shaft, and the other end is fixedly connected with the guide frame; a potentiometer synchronizing wheel is coaxially arranged on the multi-circle potentiometer and is in transmission connection with the positioning claw synchronizing wheel; according to the tracking device, the width change of the gap can be converted into analog signals of the multi-circle potentiometer to be output, so that the gap width can be monitored in real time, a control system of a welding gun can adjust welding parameters according to the gap change, and the gap welding quality is guaranteed.

The invention relates to the technical field of aircraft manufacturing and maintenance, in particular to a flat mouth glue nozzle and an aircraft deep seam and narrow seam upward posture gluing method.The method comprises the steps that S1, a stainless steel flat mouth glue nozzle matched with a deep seam and a narrow seam in size is designed, and the end of the glue nozzle is cut into an oblique angle; s2, an adhesive tape is bonded to the edges of the two sides of the deep seam and the narrow seam to be glued, the adhesive tape completely covers the seam area, and a barrier for preventing glue from dripping is formed; s3, openings are formed in the adhesive tape in the gap direction, the opening width is suitable for the width of an adhesive nozzle, and the interval length of every two adjacent openings is determined according to the length requirement of each time of adhesive injection; s4, enabling a stainless steel flat mouth glue nozzle to go deep into the opening of the adhesive tape until the oblique angle end part of the glue nozzle is in contact with the bottom or the side wall of the gap, and injecting glue; and S5, during glue injection, the sealant should overflow from the top of the gap to ensure that the opposite gap is filled, and then glue injection is conducted on the next opening.

The invention relates to a window frame pre-fixing device and an installation method, a pre-fixing assembly is arranged in a gap between a window frame and a window opening, and the pre-fixing assembly comprises a fastener and a wedge block, the fastener is used for being implanted into the gap between the window frame and the window opening and can be opened and closed, and the wedge block is used for being inserted into the middle of the fastener to enable the fastener to be opened to abut against the window frame. The window frame pre-fixing device is simple in structure, remarkable in anti-loosening effect, high in mounting efficiency, not prone to damage, capable of being easily inserted into a narrow gap which is difficult to reach by a traditional tool, good in adaptability and high in universality, the wedge blocks are not prone to loosening, effective and stable supporting is provided for the window frame, and the fixing effect is guaranteed.

The narrow-gap multi-layer parallel penetration welding rib plate comprises a bottom plate, a middle rib plate is arranged on one side of the bottom plate, after the middle rib plate and the bottom plate are welded, a first welding seam is formed at the top, and a second welding seam is formed at the bottom; side rib plates are arranged at the top end and the bottom end of the side face, where the middle rib plate is welded, of the bottom plate, the outer sides of the side rib plates and the rib plates are welded to form third welding seams, and ceramic gaskets are arranged at the positions, attached to the bottom plate, of the faces, facing the middle rib plate, of the side rib plates. The middle rib plate adopts the inequilateral double-groove and the welding sequence of'large first and small second ', and mechanical straightening is matched, so that the perpendicularity error is reduced; the two side rib plates are fixed through a special clamp, so that the parallelism error is effectively reduced; and the ceramic gasket realizes single-side welding and double-side forming of the welding seam, the problem of narrow-gap reverse welding is avoided, and the nondestructive testing qualification rate of the welding seam is greatly improved.

The utility model relates to caterpillar band cover dismounting technical field especially relates to a caterpillar band cover hydraulic dismounting device for excavator, including connecting plate, the symmetry installation hole is opened to connecting plate, two installation holes all are fixedly installed with the supporting rod, the moving hole is opened to supporting rod, the moving hole is slidably installed with the moving rod, the one end of moving rod rotatably installs the locating plate, the back of locating plate is fixedly installed with the triangular guide plate, the through -hole is opened to moving rod, the horizontal slide of through -hole is installed with the push rod, the one end of push rod is fixedly installed with the L type's jacking rod, be equipped with transmission assembly on connecting plate, the utility model discloses through the mutual cooperation of transmission assembly, push rod, moving rod, jacking rod and triangular guide plate, caterpillar band clamping between locating plate and connecting plate, greatly reduce the dependence on operating space, let construction personnel also can efficient operation in the narrow gap, effectively improve the dismounting efficiency.

The utility model provides a moving contact assembly and a switch, and relates to the technical field of electrical equipment, and the moving contact assembly comprises a rotating moving contact, the moving contact is driven to rotate to cooperate with a static contact for closing or opening, and the moving contact abuts against the static contact at a closing position for conduction. The orthographic projection of the abutting direction of the moving contact and the static contact on the rotating plane of the moving contact intersects with the rotating axial direction of the moving contact, so that the design condition of the narrow slit is greatly optimized, a smaller narrow slit size is achieved, and the problem that the narrow slit size cannot be further optimized due to the fact that the moving contact is limited in motion in a traditional design is solved. Therefore, by means of the design, the available lower limit of the narrow slit can be greatly reduced, and the closing efficiency is improved. Moreover, the effective optimization of the narrow slit enables the switch to maintain good arc extinguishing performance under a higher current load, thereby prolonging the service life of equipment, and reducing the maintenance cost. In addition, due to the design, the overall thickness of the switch can be effectively reduced, so that the size of the switch is reduced, and the overall weight is reduced.

The application provides a thick plate ring joint narrow gap arc welding process, which comprises two groups of to-be-welded cylinders in butt joint, forms a narrow gap weld, and the narrow gap weld is in a ring state; a coordinate system is established with the center of the to-be-welded cylinder as an origin, the normal line of the cylinder as a Z-axis direction, an X-axis as a horizontal direction and a Y-axis as a vertical direction; a metal backing plate is arranged in the narrow gap weld, the metal backing plate is at an angle of 45 degrees with the normal line of the to-be-welded cylinder, and a triangular area is formed between the metal backing plate and the to-be-welded cylinder; a welding gun moves in the X-axis and Y-axis directions, completely fills the triangular area, completes initial weld filling, and the welding pool plane is parallel to the X-axis; the welding gun moves along the X-axis direction, meanwhile, a roller frame drives the to-be-welded cylinder to roll, the welding pool plane is always parallel to the X-axis, and the metal backing plate intersects with the welding pool plane at the welding end point and is perpendicular to the welding pool plane; the welding gun moves along the X-axis direction, meanwhile, the welding gun is lifted along the Y-axis direction.

The application discloses a kind of automatic TIG welding device and method suitable for various grooves.The device provided by the application includes a tungsten electrode;A protective gas nozzle is provided with a narrow gap structure at the lower part, which is used to spray protective gas;Connector, which is connected with the protective gas nozzle, can avoid welding short circuit;Gas distribution part, which is connected with the connector, is used to divide the welding gas into protective gas;Tungsten electrode clamping part, which extends into the gas distribution part, is used to fix and clamp the tungsten electrode;Gun body connecting part, which is connected with the gas distribution part, provides a channel for welding gas and tungsten electrode;And the main connector of the gun body is connected with the gun body connecting part, which provides the inlet of welding gas and tungsten electrode.The device of the application is easy to install, simple to operate, and has strong practicability, and has the ability of deep narrow gap groove backing welding, filling welding and cap welding, as well as flat surfacing without any change.