153 results about "Machine repair" patented technology

The utility model belongs to the technical field of transportation machinery maintenance, and particularly relates to a scraper chain falling fault handling device. The technical problem that at present, a tool special for treating chain breakage and chain falling of the scraper conveyor is lacked, and consequently time and labor are wasted in the treatment process is solved. The utility model discloses a scraper chain falling fault handling device which comprises a T-shaped support and a pair of pull-back hook chain sets. A plurality of connecting ring hanging rod clamping crotches used for hanging pull-back hook chain sets are symmetrically arranged at the two ends of a crosspiece of the T-shaped support, a circular-arc-shaped shaft clamp is arranged at the bottom of a stand column of the T-shaped support, the axial direction of the circular-arc-shaped shaft clamp is perpendicular to a plane formed by the T-shaped support, and the circular-arc-shaped shaft clamp is connected with the stand column of the T-shaped support through an outer side arc face. Each pull-back hook chain set comprises a cylinder-like right-hand and left-hand thread lead screw opposite-pull component, an adjusting chain and a chain hook, a right-hand thread inner threaded hole and a left-hand thread inner threaded hole are formed in the front end and the rear end of each right-hand and left-hand thread lead screw opposite-pull component respectively, each right-hand thread inner threaded hole is matched with a right-hand thread lead screw, and each left-hand thread inner threaded hole is matched with a left-hand thread lead screw.

The invention discloses an equipment fault detection and maintenance prediction system and method, and the method comprises the steps: an information collection module monitors the working state of equipment in real time through a sensor, collects operation data, and an information processing module carries out the arrangement and induction of the operation data, the fault diagnosis and analysis module analyzes the data output by the information processing module through an artificial intelligence model and identifies potential fault hidden dangers, and the diagnosis generation and push module receives the potential fault hidden danger information to generate a fault list and pushes the fault list to machine maintenance personnel. A machine maintenance worker in the maintenance confirmation and feedback module carries out equipment maintenance according to a fault list, an actual fault information record is fed back to the server after maintenance is completed, and the data analysis and prediction module adopts the actual fault record fed back by the machine maintenance worker as a new historical data source predicted by the artificial intelligence model to carry out archiving analysis and prediction. The data sources are continuously increased, the artificial intelligence model is continuously optimized, and the accuracy of fault prediction and maintenance suggestions can be gradually improved.

The invention belongs to the technical field of welding equipment, and particularly relates to welding processing equipment for coal mining machinery maintenance, which comprises a welding gun and a gun head mounted at the welding end of the welding gun, and further comprises a fixing sleeve, the fixing sleeve is sleeved on the outer side wall of the gun head, the outer side wall of the fixing sleeve is sleeved with a rubber ring, the outer side wall of the rubber ring is slidably connected with a cylinder, and the cylinder is connected with the welding gun. A supporting ring is fixedly mounted at the bottom of the cylinder; the air suction unit is mounted on the outer side wall of the cylinder; a fixing seat is fixedly connected with the welding gun in an inserted mode, a mounting cavity is formed in the fixing seat, an air suction fan and a single chip microcomputer are fixedly mounted in the mounting cavity, and a dust filtering mechanism is mounted at the bottom of the fixing seat. Before the coal mining machine is welded and maintained, gas possibly remaining in the coal mining machine component can be discharged in time, the situation that the welding safety is affected by the remaining gas is avoided, meanwhile, the situation that the welding strength is affected by impurities such as coal dust and oxide skin can be avoided, and the welding quality is improved.

The application discloses a clamping tool for inner and outer circular grinding machine, and relates to the technical field of inner and outer circular grinding machines, which comprises a bottom plate, a rotating mechanism arranged on the bottom plate, adjusting mechanisms connected to the two sides of the rotating mechanism, an adapter connected to the ends of the two adjusting mechanisms away from the rotating mechanism, a moving disc connected to the adapter, and a lifting mechanism connected to the end of the moving disc away from the adapter. The inner and outer circular grinding machine is placed on the placing plate, telescopic rod II is adjusted, and is moved up and down in sleeve I. The limiting blocks on the two sides of telescopic rod II limit telescopic rod II. After telescopic rod II is moved to a suitable position, the handle is pushed, the inserting rod is pushed into the inserting hole I on telescopic rod II, the height is adjusted, and the inner and outer circular grinding machine on the placing plate is clamped.

The utility model relates to the technical field of agricultural machinery maintenance, in particular to a pulling device for agricultural machinery, which comprises a mounting block, the side wall of the mounting block is provided with two symmetrically arranged mounting grooves, and the inner wall of the mounting groove on the right side is fixedly connected with a fixed handle. A connecting rod is fixedly connected to the inner wall of the left mounting groove, a movable handle is rotatably connected to the surface of the connecting rod, a mounting hole is formed in the upper surface of the mounting block, a circular groove is formed in the lower surface of the mounting block, and a hollow groove is formed in the surface of the movable handle; two symmetrically-arranged threaded columns are fixedly connected to the two sides of the mounting block, and by arranging the threaded columns, the first threaded pipe, the second threaded pipe, the elbow, the rotary switch and the adjusting rod, in the using process, the rotary switch is rotated to drive the adjusting rod to rotate, and the height of the extraction tool can be adjusted under the interaction of the adjusting rod and the fixing rod.

This utility model discloses a novel electric screwdriver with a modular design, including a screwdriver body and a handle mechanism. The screwdriver body includes a main body shell, a screwdriver head, and a drive assembly. The rear end of the main body shell has a T-shaped or dovetail-shaped locking groove, within which a conductive groove electrically connected to the drive assembly is embedded. The handle mechanism includes a handle housing containing a battery module and a control module. The housing has a slide rail boss that matches the locking groove, and a conductive plate on the boss. When inserted into the locking groove, the plate forms an interference contact with the conductive groove, achieving stable power supply. The contact surface between the conductive groove and the conductive plate is plated with a silver-nickel alloy layer to enhance oxidation resistance. The side of the locking groove has a positioning hole for fixed connection via a limit screw. This utility model has advantages such as convenient assembly and disassembly, stable conductivity, and strong vibration resistance, solving the problems of inconvenient maintenance, limited battery life, and poor versatility of traditional electric screwdrivers. It is suitable for various scenarios such as electronic assembly and mechanical repair.

The utility model discloses a special equipment abnormal sound and vibration auxiliary detection device for machine maintenance, which comprises a sound conduction tube (1), a sound conduction hose (2) and auscultation earphones (3), the front end of the sound conduction tube is provided with a probe, the contact end of the sound conduction tube and the equipment is an arc tip, the other end of the sound conduction tube is connected into the sound conduction hose, the sound conduction hose is a rubber hose, and the auscultation earphones (3) are arranged in the sound conduction tube. One end, far away from the sound conduction tube, of the sound conduction hose is of a three-way structure, two interfaces at the upper end of the three-way structure are respectively connected into a left sound channel and a right sound channel of the auscultation earphone, and the auscultation earphone is an existing head-mounted audio playing earphone. Equipment sound received by the probe can be transmitted to the auscultation earphones through the sound transmission pipe and the sound transmission hose, so that working sound of production equipment can be transmitted to human ears conveniently, and a maintainer can hear abnormal sound generated when the production equipment works in time and judge whether the production equipment has a fault risk or not in time. Therefore, faults can be found conveniently and timely.

The invention belongs to the technical field of metal part surface corrosion protection, and relates to brush coating passivation paste for helicopter surface in-situ repair and a brush coating method. The passivation paste comprises the following components in percentage by mass: 10%-20% of citric acid, 3%-5% of acrylic resin, 3%-10% of a cellulose inorganic thickener, 3%-5% of magnesium nitrate, 0.5%-2% of urotropin, a flatting agent, 0.5%-2% of bentonite and the balance of deionized water. The problems that an existing brush coating passivation solution flows, and protective layers such as paint layers, plating layers and chemical conversion layers of peripheral parts of to-be-repaired parts are prone to being polluted or damaged during on-machine repairing are solved. And meanwhile, a needle tube type packaging and brushing tool is adopted, so that the operation during on-machine repair and the control on the dosage of the paste are facilitated.

The utility model discloses a counter-force device for calibrating pneumatic and electric wrenches, and belongs to the technical field of wrench calibration. The device comprises a base, an upper table top is arranged above the base, a protective jacket is arranged between the upper table top and the base and extends to the top of the upper table top, a positioning seat is arranged at the upper end of the protective jacket, a positioning disc is arranged above the positioning seat, and a sensor is arranged at the bottom of the positioning disc. An upper simulator base is arranged on the top surface of the upper table top, a plurality of spanner handle supports are arranged on the two sides of the top surface of the upper table top, and stop levers are arranged on the spanner handle supports; according to the utility model, on the basis of the adaptive design of a plurality of groups of mounting hole sites, the telescopic stop lever and the universal adapter of the upper simulator base, the device can be compatible with pneumatic / electric wrenches with different torque specifications and can be simultaneously adaptive to simulators with various models, equipment or core accessories do not need to be frequently replaced, the equipment investment and operation complexity of calibration operation are greatly reduced, and the calibration efficiency is improved. The method is suitable for calibration requirements of multiple scenes such as industrial manufacturing and mechanical maintenance.

The invention relates to the technical field of nuclear power overhaul, in particular to an online machining and repairing device for a nuclear reactor pressure vessel flange sealing surface. The device comprises a base mechanism, a main shaft rotating mechanism, a cutting arm beam and a dust collection mechanism, the base mechanism and the pressure vessel cylinder are coaxially arranged, and the base mechanism is supported on the inner wall of the pressure vessel cylinder; a hole structure is arranged in the center of the base mechanism; the main shaft rotating mechanism is adaptively connected with the hole structure of the base mechanism; the cutting arm beam is horizontally arranged and fixedly connected to the upper end face of the spindle rotating mechanism through a pressing plate, the spindle rotating mechanism drives the cutting arm beam to rotate, and a tool at the head of the cutting arm beam is driven to conduct online machining repair on the nuclear reactor pressure vessel flange sealing face. The shielding mechanism is located on the lower portion of the base mechanism, installed on the hanging basket supporting face in the pressure container and attached to the inner wall of a cylinder of the pressure container. The dust collection mechanism is connected to the side wall of the cutting arm beam, and the dust collection mechanism and the cutting arm beam rotate synchronously. According to the invention, the problem that online intelligent repair cannot be carried out on the flange sealing surface in the maintenance process of the reactor pressure vessel of the pressurized water reactor nuclear power station at present is solved, and the aim of ensuring the sealing performance and integrity of the pressure-bearing boundary of the primary loop through a reliable maintenance means is fulfilled.

The utility model discloses a pet air-drying box with a modularized installation structure, which is characterized in that the pet air-drying box comprises an air-drying box body and a fan arranged on the air-drying box body, the air-drying box body is provided with an air-drying chamber, and the air-drying box body is mainly formed by assembling a plurality of groups of detachable module components; when a certain module assembly breaks down, only the module assembly needs to be detached for repair, and compared with a whole machine repair mode adopted in the prior art, operation is simpler and more convenient. The device is simple in structure, good in stability and convenient to disassemble, assemble and maintain.

The utility model relates to the technical field of cigarette machine maintenance, in particular to a universal taking-out tool for a driving wheel of a cigarette making machine. The taking-out tool comprises a support, a drawing assembly and a supporting assembly. The drawing assembly comprises a pull rod and a pull claw, the first end of the pull rod is installed on the support and can move on the support in the radial direction of the transmission wheel, the pull claw is arranged at the second end of the pull rod, and the pull claw is used for abutting against the inner side face of the transmission wheel; the supporting assembly comprises a supporting rod, the supporting rod is installed on the support in a threaded mode and can move on the support in the radial direction of the transmission wheel, the supporting rod is located on the outer side of the pull rod in the radial direction of the transmission wheel, and the inner end of the supporting rod abuts against an equipment wallboard in the cigarette making machine. According to the taking-out tool, driving wheels with different diameters and different positions can be taken out conveniently, and the maintenance efficiency of the driving wheels is improved.

The utility model discloses a coal mine machinery dismounting device, and belongs to the field of coal mine machinery dismounting, the coal mine machinery dismounting device comprises a mounting seat and a sliding seat, the middle part above the sliding seat is fixedly connected with a first threaded rod, and the interior of the first threaded rod is rotatably connected with a second threaded rod. Three rotating rods penetrate through a bearing, then a second handle is rotated, a moving block drives the rotating rods to be unfolded, an outer protrusion clamps the lower portion of the bearing, a first handle is rotated reversely, a sliding base moves upwards, the device applies force to separate the bearing from the workpiece, and when the bearing outside the workpiece is disassembled, the first handle is rotated, the sliding base moves upwards, and the device is cooperated with a component through a structure to disassemble the bearing. The device can adapt to bearings at different positions, is widely applied to maintenance of coal mine machinery, improves the maintenance flexibility and comprehensiveness, saves the equipment maintenance cost, guarantees stable operation of equipment, and improves the production safety and reliability.

The invention provides a longitudinal beam replacement device and method for a coal mine belt conveyor, and belongs to the technical field of mining machinery maintenance. The device comprises a moving platform, a walking mechanism, a carrier roller frame jacking mechanism and a first driving mechanism. The walking mechanism is arranged at the top of the moving platform and is embedded into a notch of the longitudinal beam to roll; the carrier roller frame jacking mechanism is installed on the moving platform and comprises a second driving mechanism, a transmission connecting rod assembly and a top bearing beam, the second driving mechanism drives the transmission connecting rod assembly to enable the top bearing beam to vertically ascend and descend, and therefore the upper groove carrier roller frame is jacked up or put down; the first driving mechanism drives the moving platform to move along the longitudinal beam. The device has the beneficial effects that the belt conveyor longitudinal beam is used as a walking track, rapid migration of the device is achieved through driving of the first driving mechanism, simultaneous jacking of multiple sets of carrier roller frames is achieved through the transmission connecting rod assembly, an operation space is provided for replacement of the belt conveyor longitudinal beam, the manual carrying strength is remarkably reduced, and the working efficiency is improved. And the longitudinal beam replacement efficiency and the operation safety are improved.

The utility model relates to the technical field of engineering machinery maintenance, and discloses an engineering machinery maintenance commodity shelf which comprises a bearing plate, and a rotating disc is connected to the bearing plate in a sliding mode. The electric hydraulic cylinder is started to drive the moving plate to move, at the moment, the sliding hole slides along the outer wall of the sliding rod, the moving plate drives the sliding rod to move, the sliding rod drives the sliding plate to slide along the inner wall of the sliding groove, the sliding plate drives the connecting frame to move, and the connecting frame drives the clamping plate to move. The two clamping plates can move relatively to clamp objects on the object placing plate, the distance between the clamping plates can be flexibly adjusted according to the sizes of the objects, various engineering machinery parts can be stably fixed, the objects are effectively prevented from falling off due to shaking and collision in the maintenance or object placing process, the safety of the object placing frame is improved, and the service life of the object placing frame is prolonged. And the risk that workers are injured by objects falling from high altitudes is avoided.

The utility model belongs to the technical field of arresting devices, and particularly relates to a cart arresting device for port machinery maintenance, which comprises a base and further comprises an overturning plate, a movable plate, a movable plate, a movable plate, a movable plate and a movable plate, and the overturning plate is arranged on the top surface of the base in an overturning manner; the driving mechanism is connected to the turnover plate in a drivable manner and is used for driving the turnover plate to turn over; the sliding plate is provided with a guide notch in the turnover plate, and the sliding plate is movably arranged in the guide notch; the clamping mechanism is mounted on the sliding plate, and is used for clamping a wheel; the adjusting mechanism is used for adjusting the initial height of the sliding plate, the adjusting mechanism comprises a top plate, a threaded lead screw and a handle, and the top plate is fixed to the free end of the overturning plate; according to the wheel clamping device, the initial height of the clamping mechanism can be adjusted through the arranged adjusting mechanism, wheels of different sizes can be reliably clamped, stability is improved, and the application range is wider.

The utility model discloses an engineering construction machinery maintenance device which comprises outer side handles, a control panel, rotating universal wheels and a concave machine box with a storage battery, the outer side handles are installed and connected to the outer sides of the two ends of the concave machine box with the storage battery, and the rotating universal wheels are arranged at the lower end of the concave machine box with the storage battery. A control panel is arranged on the left side of the upper end of the concave case with the storage battery, a telescopic rotating mechanism is arranged on the inner side of the left end of the concave case with the storage battery, a workpiece clamping mechanism is arranged at the front end of the telescopic rotating mechanism, and electric lifting mechanisms are arranged on the two sides of the bottom end in the concave case with the storage battery. And an engineering construction machinery maintenance platform is arranged between the two electric lifting mechanisms. The engineering construction machinery maintenance device disclosed by the utility model has the technical effect that the angle of the maintenance part can be changed for maintenance according to maintenance requirements.

The invention discloses an axis self-adaptive alignment and precise disassembly method for a heavy hydraulic cylinder, and belongs to the technical field of mining machinery maintenance. In order to solve the problems that a traditional disassembling method is low in efficiency, poor in safety, prone to damage a workpiece and the like, the method is achieved through the steps of pretreatment fixing, axis self-adaptive alignment, precise clamping and final alignment, controllable unscrewing disassembling and the like. Which comprises a rack, an adjustable fixing seat, a hydraulic driving system and a control system, and is characterized in that an axis self-adaptive alignment mechanism consisting of a customized chuck and an alignment disc is arranged. An annular boss on the alignment disc is matched with a groove, and axis coincidence of the chuck and the workpiece can be automatically guided and accurately corrected. Mechanization and precision of the disassembling process are achieved, the disassembling efficiency is improved by 100% to 20 pieces per shift, the disassembling success rate reaches up to 99.8%, the labor intensity, the safety risk and the maintenance cost are remarkably reduced, and good application and popularization prospects are achieved.

The utility model discloses a device for separating a valve core and a shell of a steering gear box, which relates to the technical field of maintenance of loading machinery and comprises a connecting block and a hexagonal head matched with a transmission spline housing of the valve core, a grip for holding is arranged on one side of the connecting block, and a long rod is arranged between the connecting block and the hexagonal head. The hexagonal head is inserted into the transmission spline housing of the valve core of the steering gear box, and the sleeve wrench is rotated to enable the valve core fixing spring to contract and to be separated from the shell, so that the time for disassembling the valve core of the steering gear box is shortened.

The utility model relates to a mechanical maintenance debugging platform which comprises a workbench, a two-way screw and a supporting column, a base is fixedly installed at the bottom of the workbench, the two-way screw is rotatably installed in the workbench, a push rod is installed outside the two-way screw in a threaded mode, a bearing plate is movably installed on the outer side of the push rod, and the supporting column is fixedly installed at the bottom of the bearing plate. Universal wheels are movably mounted at the bottoms of the supporting columns, and fixing sleeves are fixedly mounted between the universal wheels through mounting rods. Through mutual cooperation of a bearing plate, pushing rods, a connecting base and a threaded sleeve, a two-way screw can conveniently rotate in the workbench through rotation of the output end of a motor, the rotation of the two-way screw can enable the threaded sleeve to move in the thread direction of the exterior of the two-way screw, the pushing rods can rotate around the connecting base, and the working efficiency is improved. Therefore, the bearing plate is moved towards the two sides of the workbench, the bearing area during maintenance is increased, and bearing can be carried out according to the sizes of machines of other types.

The utility model relates to a trimming mechanism of a laminating machine. The trimming mechanism comprises a laminating machine body, a laminating machine fixing frame is arranged at the bottom of the laminating machine body; the top, far away from the laminating machine body, of the laminating machine fixing frame is fixedly connected with a first fixing plate; a pair of first fixing plates are symmetrically arranged at the bottom of the laminating machine fixing frame; the side wall, close to the laminating machine body, of the first fixing plate is slidably connected with a second fixing plate. The side wall, away from the first fixing plate, of the second fixing plate is slidably connected with a tool apron. The bottom, away from the first fixing plate, of the tool apron is fixedly connected with a blade. The tops of the pair of first fixing plates are jointly and fixedly connected with a transverse plate. In the step, by arranging a first fixing plate, a second fixing plate, a tool apron and a blade, the blade is adjusted to a proper position to conduct trimming treatment on materials such as paper, the convenience of cutting the materials of different sizes is improved, the adaptability of the device in use is improved, and the problems that the production efficiency is reduced and the like are solved.

The utility model discloses an auxiliary lifting device for port machinery maintenance, which relates to the technical field of machinery maintenance, comprises a movable seat and is characterized in that the top end of the movable seat is provided with a lifting device, and the top end of the lifting device is fixedly connected with a servo motor. The adjusting screw is rotated to drive the sliding block to move horizontally, the adjusting plate can be pushed to achieve inclined or horizontal displacement by means of a connecting rod mechanism composed of the rotating rod and the supporting rod, and therefore the device can adapt to harbor machinery maintenance parts of various shapes and structures, and the harbor machinery maintenance parts are not prone to falling off. And the movable block can flexibly slide along the adjusting plate and is inserted into the limiting hole through the insertion rod to fix the position, rapid adjustment can be conducted according to maintenance parts of different sizes, and the practicability of the device in port machinery maintenance is further enhanced.

The utility model provides a mining equipment machinery maintenance wrench, which comprises a wrench cylinder and an inner hexagonal wrench head, one end of the wrench cylinder is embedded with an insertion connecting sleeve, one end of the inner hexagonal wrench head is provided with a positioning connecting column, and the positioning connecting column is inserted into the insertion connecting sleeve so that the inner hexagonal wrench head is connected with the wrench cylinder. A bolt adjusting column is installed on the side portion of the wrench cylinder column, an adjusting handle is installed at one end of the bolt adjusting column, and a threaded connecting hole is formed in the side portion of the positioning connecting column. The positioning connecting column is inserted into the inserting connecting sleeve so that the inner hexagonal wrench head can be connected with the wrench cylinder, the bolt adjusting column is installed on the side portion of the wrench cylinder, the threaded connecting hole is formed in the side portion of the positioning connecting column, and the other end of the bolt adjusting column is connected with the threaded connecting hole. And the tightness of the bolt adjusting column is conveniently adjusted through the adjusting handle, so that the inner hexagonal wrench head is quickly disassembled, mounted and replaced, and the operation is very convenient.

The utility model discloses a dismounting device for a sealing ring of a crankshaft of a loading machine engine, which belongs to the technical field of mechanical maintenance tools and comprises a positioning disc used for fixing the sealing ring of the crankshaft and a small puller mounted at the upper end of the positioning disc, and the small puller is movably mounted at the upper end of the positioning disc. A self-tapping screw and a connecting part are connected and fastened with a hole groove in the upper end of a sealing ring, then an adjusting screw rod is installed, after the adjusting screw rod is in place, an operation tool is used for rotating a hexagonal adjusting part at the end, the interior of the hexagonal adjusting part abuts against the inner side of the sealing ring installation position, and the installation shell and the crankshaft sealing ring are separated from the interior of a sealing ring installation cavity; under the condition that a tool is not used for damaging the sealing ring, the sealing ring is taken out, if the adjusting screw rod is inconvenient to operate, the adjusting screw rod can be replaced by a small puller, and operation and disassembly are convenient.

The utility model discloses a lossless torque dismounting tool of a lower shaft sleeve for an oil sprayer, which belongs to the technical field of mechanical maintenance tools and comprises a torque controller, a locking piece and two symmetrical arc-shaped hoops, the locking piece is fixed on the two arc-shaped hoops, and the position of the locking piece can be adjusted. The two arc-shaped hoops are fixed through the locking piece to form a hoop sleeve used for clamping and holding a lower shaft sleeve of the oil sprayer, after the two arc-shaped hoops are clamped and fixed to the lower shaft sleeve of the oil sprayer, a gap of 1-2 mm is reserved between the side end faces of the two arc-shaped hoops, and a torsion hole matched with a torsion controller is formed between the top ends of the two arc-shaped hoops. The torsion hole and the hoop sleeve are both coaxial with the oil sprayer lower shaft sleeve. The torque controller is stressed to drive the hoop sleeve to rotate through the torque hole and disassemble and assemble the oil injector lower shaft sleeve, so that the problems that the torque application cannot be consistent with the manufacturer standard when the oil injector is autonomously repaired, and the oil injector lower shaft sleeve is easily damaged and scrapped due to the pipe wrench side rotation torque are solved; the device has the advantages of being high in autonomous repairing and dismounting efficiency, standardized in dismounting torque and low in maintenance cost.

The present invention belongs to the technical field of welding equipment, and in particular relates to a welding processing equipment for coal mining machinery maintenance, comprising a welding gun and a gun head installed at the welding end of the welding gun, and further comprising: a fixed sleeve, the fixed sleeve being sleeved on the outer wall of the gun head, the outer wall of the fixed sleeve being sleeved with a rubber ring, and the outer wall of the rubber ring being slidably connected to a cylinder, the bottom of the cylinder being fixedly installed with a support ring; an air suction unit being installed on the outer wall of the cylinder; a fixed seat being fixedly plugged into the welding gun, the interior of the fixed seat being provided with an installation cavity, and the interior of the installation cavity being fixedly installed with an air suction fan and a single-chip microcomputer, and the bottom of the fixed seat being installed with a dust filter mechanism. The present invention can promptly discharge gas that may remain inside the components of the coal mining machine before welding and repairing the coal mining machine, thereby preventing the residual gas from affecting welding safety, and at the same time, preventing impurities such as coal dust and oxide scale from affecting welding strength, thereby improving welding quality.

The invention belongs to the technical field of mechanical maintenance tools, and discloses a dismounting device for a surface sealing assembly, which is used for dismounting the surface sealing assembly and comprises a tip cone, a driving sleeve shell, a supporting shell and a clamping jaw, the supporting shell is of a cylindrical structure, and the bottom of the supporting shell is an annular surface of a bearing seat shell matched with the surface sealing assembly; the driving sleeve shell and the clamping jaw extend into the cylinder from the top of the supporting shell, the driving sleeve shell is of a cylinder structure with a convex ring on the upper portion, the lower portion of the driving sleeve shell is arranged in the cylinder of the supporting shell, the clamping jaw extends into an inner cylinder of the driving sleeve shell from the upper portion of the driving sleeve shell, and the lower portion of the clamping jaw extends out of the bottom of the supporting shell. The bottoms of the clamping jaws are of outer jaw structures protruding in the circumferential direction. The middle of the clamping jaw is hollow, the clamping jaw is of a structure with the diameter gradually reduced from the middle to the bottom, and the tip cone is inserted into a hollow hole of the clamping jaw from the top of the clamping jaw. The device can effectively solve the problems that the operation space is extremely narrow, a thin-wall shell is prone to deformation, and quick-wear parts need to be protected.

The utility model discloses a device for quickly taking out a bearing of an air swelling shaft, and belongs to the technical field of mechanical maintenance. The device mainly comprises a base, a telescopic clamping mechanism is fixedly connected to the base and comprises a lead screw fixedly connected with the base, the top of the lead screw is fixedly connected with two sets of oppositely-arranged sliding bases, each set of sliding bases is provided with four sliding base grooves, one side of each sliding base groove is provided with a sliding base limiting hole, and a top plate is slidably connected into each sliding base groove. A connecting column is fixedly connected between the two top plates and slidably connected with the sliding seat limiting holes, a rotating grip rotationally connected with the lead screw is arranged at the bottom of the inner sliding seat, a grip is fixedly connected to one side of the rotating disc, and a plurality of limiting holes are formed in one side of the interior of the grip. The top plate can stretch out and draw back synchronously by rotating the grip so as to adapt to bearings of different sizes, and the pipeline is arranged in the top plate, so that a rust remover can directly remove rust at the joint of the bearing and the air swelling shaft conveniently.

The utility model discloses a cart arresting device for harbor machinery maintenance, which comprises a supporting strip, a moving groove is arranged on the inner side of the supporting strip, and a moving column is rotatably connected in the moving groove. The semi-arc-shaped blocks on the supporting strips abut against the wheels, then the movable columns are rotated through the cranks, the movable blocks can slide in the movable grooves, the semi-arc-shaped blocks are driven to move, adjustable clamping of the wheels of the cart is achieved, the situation that the wheels rotate to drive the cart to move can be effectively avoided, and use safety is improved; the shape of the semi-arc-shaped block is used for preventing the semi-arc-shaped block from colliding with a baffle, a pipeline and other components possibly existing above the cart wheel, so that the applicability can be improved, then through the cooperation of a reinforcing groove, a hollow plate, a reinforcing plate and a fixing bolt on the semi-arc-shaped block, the reinforcing plate can be stored or pulled out and fixed according to needs, and the practicability is high. And the wheel clamping and fixing effects are enhanced.