88results about How to "Smooth and reliable rotation" patented technology

The invention discloses a thunder-lightening induced solid-phase arc-extinguishing lightning arrester. The thunder-lightening induced solid-phase arc-extinguishing lightning arrester mainly consists of a lightning arrester shell, an arc-extinguishing rotary table, an electric conduction metal plate, a starting rod, a clamping rod, an induction coil, an arc-extinguishing barrel and a counting pointer; the arc-extinguishing rotary table is arranged inside the lightning arrester shell, and a flat spiral spring for pushing the arc-extinguishing rotary table to rotate is arranged at the central position of the arc-extinguishing rotary table; the electric conduction metal plate is arranged at the upper part of the arc-extinguishing rotary table; the arc-extinguishing rotary table is provided with a plurality of arc-extinguishing gas pills in the peripheral direction; one side of each arc-extinguishing gas pill is provided with a trigger electrode and a groove respectively, one end of each trigger electrode is connected with one of trigger ends of the corresponding arc-extinguishing gas pill through a lead, and the other ends of the trigger electrodes extend out of the edge of the arc-extinguishing rotary table; and the other of the trigger ends of the corresponding arc-extinguishing gas pill is connected with the electric conduction metal plate through a lead. The thunder-lightening induced solid-phase arc-extinguishing lightning arrester is simple in structure, reasonable in design, high in arc-extinguishing ability and stable and reliable to work, and the arc-extinguishing gas pills are changed quickly and conveniently.

The invention relates to a three-level type automatic ammunition-filling ammunition-pressing production line, which comprises six anti-explosion chambers, wherein the six anti-explosion chambers are composed of three ammunition-filling chambers and three ammunition-pressing chambers which are staggered. Rotating anti-explosion doors are respectively arranged among the anti-explosion chambers and anti-explosion walls positioned at two ends of each anti-explosion chamber and outside each anti-explosion chamber. Each ammunition-filling chamber is provided with a flow line, and an ammunition conveying mechanical hand, an ammunition sleeve wiping machine, a multi-station turntable and a die delivery device are sequentially arranged on an inlet of the flow line. The other side of an ammunition-weighing ammunition-filling machine is provided with a connecting gate type anti-explosion door, and an ammunition outlet is located on an ammunition barrel conveying device positioned above the ammunition-weighing ammunition-filling machine. The ammunition-weighing ammunition-filling machine is arranged on one side of the multi-station turntable, and an ammunition-flushing wiping device is arranged on the other side of the multi-station turntable. The inside of each ammunition-pressing chamber is also provided with a flow line, and a die delivery device which is the same as the die delivery device in each ammunition-filling chamber, a multi-station turntable which is the same as the multi-station turntable in each ammunition-filling chamber, an ammunition sleeve lifting device and an ammunition conveying mechanical hand which is the same as the ammunition conveying mechanical hand in each ammunition-filling chamber are sequentially arranged on the flow line. A pressing machine and an auxiliary device are arranged on one side of each multi-station turntable. The three-level type automatic ammunition-filling ammunition-pressing production line can be widely used for production of dangerous articles which are inflammable and explosive.

The present invention relates to a vertical rotary bed ultragravity field device, which is used for water disposing in environmental protection and for the aggrandizement of the physics and chemistry reaction in the process of atmosphere disposing. The device is also suitable to be used in the mass transfer and the reaction process of the multiphase liquid in various chemical industries. The device comprises a barrel-shaped upright shell with an air inlet arranged at the side. The middle of the shell is provided with a vertical rotating element, while the lower part of the shell is provided with a waste liquid bypass outlet. The middle of the rotating element is provided with an air guide barrel, the lower part of the air guide barrel is provided with an air inlet, while the top of the air guide barrel is connected with a demister. The side wall of the rotating element is the rotary packed bed. The whole rotating element is connected with a transmission device which provides power. The upper part of the rotating element is provided with at least three units of bearing guide pulley to form an inner inscribed circle. The rotating element rotates according to the position which is limited by the inscribed circle to bear and guide the rotation of the rotating element. As the device adopts at least three units of bearing guide pulley for supporting, both ends of the rotating element can rotate stably and reliably under the bearing, and the diameter and the volume of the rotating element can be increased. The device is used for the atmosphere disposing.

The invention discloses a repair technique of a main transmission gear of an oxygen making air compressor, comprising the following technique steps: 1) the residual service life of a damaged main transmission gear to be repaired is evaluated; 2) a 40CrMo series steel bolts with high strength are embedded at the positions where the local gears are broken; 3) the original design dimension and shape of the main transmission gear are manufactured or repaired by a laser directional light prototype; 4) the gear surface and the gear shape are repaired by a contour machining, thus reaching the technical requirement of original design tolerance and geometric tolerance of the gear surface. The invention has the advantages and effective effects that the damaged main transmission gear is fully repaired by the technique method and the oxygen making air compressor gear of the invention; furthermore, the performance of the repaired main transmission gear reaches the original design technical requirement, the wearability and stress corrosion resistance are improved, and the rotation in the application operation is ensured stable and reliable; meanwhile, the service life index of the repaired main transmission gear complies with or exceeds the original design requirement.

The invention provides a centering and clamping device for a multi-diameter pipe. The device comprises a rack end cover, a rocker, a motor, a motor base, a rack, a connecting block, a sliding block vertical column, a movable sliding block, a screwing-in sliding frame, a transmission gear, a rotating shaft frame, a motor gear, a motor shaft, a threaded rod, a fixing nut, a ball bearing and a shaftsleeve, wherein the rack end cover is arranged on the right side of the upper part of the rack through bolts; the rocker is clamped at the right end of the threaded rod, and the motor is welded to theupper part of the motor base. The motor drives the motor gear to rotate, the rotating shaft frame is rotated through gear transmission, the movable sliding block and the screwing-in sliding frame aredriven to rotate synchronously, and the pipe rotates along with the movable sliding block and the screwing-in sliding frame; the simple structure is used, so that clamping and centering of pipes withdifferent diameters are achieved in the actual operation process, the rotating speed during pipe machining is adjusted, the tool cost is reduced, and the quality and machining efficiency of the outersurface of the pipe are improved.

A conventional invention has a structure of a washing chamber in which the work is set on a table and the entire surface of the work is consistently washed and dried by rotations in an orbital motion and a planetary motion of the washing and drying nozzles which are respectively provided in all four directions-top, bottom, right and left. The conventional invention effectively washes a greater area of the work or the like, but due to limitations of the structure, it can wash only small-sized works or small components. Also, it does not always sufficiently wash and dry large-sized works, and consequently overhaul such works. To resolve the problems, besides the above structures, the present invention provides an additional structure of a rotary frame to generate rotations in an orbital motion and planetary motion so that the works can be efficiently and entirely washed and dried, and the overhaul of the works can consequently be completed.

The invention provides a hemispherical monitoring device, comprising a base, a hemispherical transparent cover and a camera, wherein the base is a rectangular hollow structure, the hemispherical transparent cover is arranged on an upper end surface of the base to form a sealed hemispherical cavity, and a camera adjustment device is fixedly arranged on the upper end surface of the base in the hemispherical cavity; the camera adjustment device comprises a support shaft that is fixedly connected to the center of the upper end surface in a vertical upward direction, the other end of the support shaft is in flexible connection with a driven gear through a bearing, a driving gear is vertically meshed with the driven gear, the driving gear is connected with a motor through a transmission shaft, the motor is arranged in the base, the driven gear is vertically and upwardly provided with three independent hydraulic rods to form a row, the other end of each hydraulic rod is connected to a camerafixing plate, and the camera is arranged in the center of the camera fixing plate. According to the hemispherical monitoring device provided by the invention, the camera adjustment device adopts geartransmission and hydraulic rod adjustment, and thus the camera has a larger shooting range, and meanwhile, the rotation of the camera is stable and reliable.

The invention discloses a multifunctional tooling bracket for assembling and disassembling main lattice cylinder positions of large cylinders of lattice steel sheet piles. The multifunctional tooling bracket comprises a base support pile, an upper support base bracket fixedly arranged on the base support pile and is used for supporting four groups of 1 / 4 circle-shaped steel sheet pile preassembling pieces and assembling the large cylinders of the lattice steel sheet piles, a lifting device arranged on the upper support base bracket and used for driving the 1 / 4 circle-shaped steel sheet pile preassembling pieces to lift on the upper support base bracket, a rotation device arranged on the upper support base bracket and used for driving the 1 / 4 circle-shaped steel sheet pile preassembling pieces to rotate on the upper support base bracket, and an airbag expanding device arranged on the upper support base bracket and used for compensating a preserved gap between the tooling bracket and the steel sheet piles after the steel sheet piles are assembled and folded, so that the support base bracket can be used for effectively supporting the steel sheet piles. The multifunctional tooling bracket can be used for effectively assembling and constructing the main lattice cylinder positions of the large cylinders of the lattice steel sheet piles on a construction site under the requirements of construction period and site condition with limits of upper, lower, left and right positions during the construction of an artificial island.

The invention discloses a soft capsule dryer, and aims to solve the problems that a rotary cage of the conventional dryer is high in oscillation and cannot be cleaned on line. The soft capsule dryer comprises a frame, an upper cover and a rotary cage component, wherein a box body is arranged on the frame; the box body and the upper cover are fitted to define an accommodating space; the rotary cage component is arranged in the accommodating space, and comprises a cage body; mounting plates are arranged at both ends of the cage body; rotary teeth are formed in the outer circumference surface of at least one mounting plate; a driving wheel meshed with the rotary teeth in the mounting plate and a driving cylinder used for driving the driving wheel to rotate are arranged on the frame; the mounting plates are arranged on the frame and in running fit with the frame; a cleaning device used for cleaning the cage body is arranged in the accommodating space; and a notch used for discharging a cleaning solution out of the box body is formed in the box body. The soft capsule dryer is simple in structure, convenient to mount and clean, short in processing time, low in noise, long in service life and the like.

The invention relates to a vane impulse generator that includes valve case, liquid channel, installing end surface, bevel gear, static vane, active vane, and through hole. The liquid channel is straight channel, and the static vane and active vane is plumped installing in the liquid channel. The rotating shaft of vertical taper gear passing through the center of static vane and connecting to the active vane center, and the rotating shaft of level taper gear connects to the speed adjusting motor. The invention is simple structure, convenient to be processed, low energy consumption and impulse frequency could be directly adjusted.

The invention discloses a vertical servo hydraulic tool rest, which comprises a base, cylindrical vertical shafts, a drive system, inner gear rings, tool stages and a braking and loosening component, wherein the inner sides of the lower ends of the tool stages are fixedly with a movable fluted disc respectively, while upper ends are fixedly connected with the inner gear rings; fixed fluted discs are arranged on the upper end face of the base between the movable fluted discs and the vertical shafts; meshing teeth are arranged on the upper end faces of the movable fluted discs and the fixed fluted discs; the inner gear rings and the tool stages are driven by the drive system to rotate; the drive system comprises a speed reducer, a servo motor, a drive gear and a transmission gear; the speed reducer and the servo motor are connected with each other and are arranged below a bearing block; the drive gear is arranged above the bearing block, and is connected with an output shaft of the speed reducer; and the transmission gear is arranged on the bearing block, is externally meshed with the drive gear and is internally meshed with the inner gear rings. The vertical servo hydraulic tool rest has the characteristics of small moment of inertia, stable rotation, large output torque and relatively larger braking torque.

The invention belongs to the technical field of high-quality steel preparation, and particularly relates to a high-quality steel plate blank turnover device. According to the existing problems of colliding to steel plates in the turnover process of an existing plate turnover device and poor safety of the turnover device, the following scheme is provided, the high-quality steel plate blank turnoverdevice comprises a turnover platform; the top of the turnover platform is connected with a portal frame; a locating device is mounted on the top face of the turnover platform; a locating hinged seatis connected to the locating device; a first turnover assembly and a second turnover assembly which are oppositely arranged are rotationally connected to the top of the locating hinged seat; the firstturnover assembly and the second turnover assembly each comprise a plate blank containing seat; plate blank containing grooves are arranged on the side faces, close to each other, of the plate blankcontaining seats; and the bottom end of the locating hinged seat is connected with a supporting plate. According to the high-quality steel plate blank turnover device, the dual functions of the turnover process and horizontal movement of steel plate blanks are achieved, meanwhile, a good protection function is achieved on the steel plate blanks and turnover equipment, and practicality is high.

The invention discloses a measuring tool and a measuring method for measuring the internal diameter of an annular hole. The measuring tool comprises a gauge body, an indicating gauge and a lever. The gauge body has a measuring portion. The sidewall of the gauge body is equipped with a mounting groove. The gauge body is also equipped with an indicating gauge mounting hole that penetrates the sidewall of the gauge body and the bottom surface of the mounting groove. The measuring end of the indicating gauge is disposed in the indicating gauge mounting hole. The lever, disposed in the mounting groove through a rotating shaft, has a pull portion, a first extension portion and a second extension portion, wherein the end of the first extension portion is provided with a measuring ball head, and the end of the second extension portion has a contact surface that contacts the measuring end of the indicating gauge. The sidewall of the measuring portion, far away from the mounting groove, is provided with a probe. The measuring ball head of the first extension portion is positioned in the mounting groove of the measuring portion. The measuring tool and the measuring method help to solve the problem that conventional measuring tools such as vernier calipers, internal diameter indicating gauges and special-purpose plug gauges cannot accurately measure the internal diameter of annular holes and holes with bosses or protruding parts inside.

The invention discloses a constant force mechanism based banana harvesting device capable of automatically adapting to the banana tree stem. The device comprises a frame, an outer cutter head, an inner cutter head, a first fixed shaft, a second fixed shaft, a first elevating stop block, a second elevating stop block, a torsional spring, a fixed rack, a hard blade installation rack, a movable guiderod, a horizontal compression spring, a public column, an inclined compression spring, a hard blade, and a soft blade. The annular inner cutter head and the outer cutter head can rotate around the axes of the inner cutter head and the outer cutter head and sequentially arranged on the through hole of the frame. Multiple annular arrays of the fixed rack are arranged on the inner cutter head. The fixed rack and the hard blade installation rack are connected by the movable guide rod. The horizontal compression spring sleeves the movable guide rod. The public column is connected to the hard bladeinstallation rack through the inclined compression spring. The hard blade is mounted on the hard blade installation rack. The soft blade is rivetingly arranged on the external side of the hard bladeso as to form an annular enveloping structure that envelopes a banana spike. The provided device has the advantages that the device can automatically adapt to the banana tree stems and in a certain constant force displacement range, the clamping force is constant.

An existing classroom is insufficient in presentation space, and interference problems can be easily formed; the invention aims at the problems, and provides a novel multifunctional three-face turning blackboard with simple structure and capable of realizing triangular prism surface intermittence motions while ensuring flatness; the blackboard can realize writing presentation comprising a white board and the blackboard, and can realize multimedia display like an LED, a liquid crystal screen and curtain; the multifunctional three-face turning blackboard takes the cam intermittence motion mechanism, a torsion spring transmission mechanism and an intermittence prop mechanism as the cores; the cam mechanism comprises a cam dial and a cam triangle connected with a torsion spring coupling mechanism through a transmission shaft, thus realizing flexible transmission; the intermittence prop mechanism comprises a cam dial, a pressure spring and a prop; the prop is intermittently pushed and returned by a secondary cam on the cam dial, thus realizing triangular prism intermittence locking and loosening; the multifunctional three-face turning blackboard is simple in structure, can ensure the flatness of the blackboard surface, and the triangular prism application can realize multifunctional display effect.

A cosmetic applicator includes a body which includes a tip part and an extension which has a threaded portion. A case has a rotary member threadedly connected to the threaded portion. A contact member is received in the case which has a contact portion located corresponding to the shoulder of the body. A liquid supply unit is axially received in the body and the case, and has a liquid tube, a duct and a guide tube. The liquid tube contacts the contact member. The duct is inserted in the liquid tube and has a passage. A sealing member is removably located at the duct to seal or open the passage. A clip is connected to a groove between the case and the body before first use. The clip is removed and the case is rotated to move the sealing member to allow cosmetic liquid to reach the tip part.

The invention discloses a single-disc wheel type solid-phase arc extinguishing lightning protection device, which is characterized in that an arc extinguishing lightning protection body comprises a device shell, a metal screw, an induction coil, a central shaft, an arc striking ring, an arc extinguishing cylinder, an arc extinguishing turntable and a flat spiral spring, the metal screw is arrangedat the top end of the device shell, the induction coil is embedded in the shell between the inner wall and the outer wall of the top end of the device shell, the lower end of the screw penetrates through the induction coil and extends into the device shell, an arc striking ring made of a metal material is arranged on the inner wall of the top end of the arc extinguishing cylinder, the central shaft is arranged in the center of a cavity of the device shell, the arc extinguishing turntable is rotatably arranged on the central shaft, the flat spiral spring for pushing the arc extinguishing turntable to rotate is arranged in the center of the arc extinguishing turntable, and a plurality of placement grooves for placing arc extinguishing gas pills in the radial direction are uniformly formed in the circumferential side wall of the arc extinguishing turntable. According to the invention, the air flow leakage in the turntable switching process is avoided, and the turntable switching reliability is improved.

The invention discloses a button fixture. The button fixture comprises a fixture body matched with an external button carving machine, the fixture body is provided with a plurality of button holding chambers, a rotating shaft is arranged in the middle of the fixture body, and a driving device for driving the rotating shaft to rotate is connected outside the rotating shaft. During processing, buttons to be processed are placed in the button holding chambers, the driving device drives the rotating shaft to rotate, and the rotating shaft drives the fixture body to rotate so that a laser carver on the external button carving machine continuously processes the buttons placed in the button holding chambers. The whole processing process is coherent, and automation degree, processing efficiency and processing precision are high. The invention further discloses the button carving machine applying the button fixture, and the button carving machine is high in processing efficiency and processing precision.

The invention discloses a rotary conveying device for processing bagged ham sausage. The device comprises a first clamping frame. An upper clamping plate is horizontally arranged above the first clamping frame, an upper fixing hole is formed in the middle of the upper clamping plate, and a rotary conveying set is installed on one side of the first clamping frame; and a plurality of rotary receiving rollers are installed on the rotary conveying set, second clamping frames are perpendicularly arranged on one sides of the rotary receiving rollers correspondingly, clamping grooves are horizontally formed above the second clamping frames correspondingly, and a lower clamping plate is horizontally arranged below the first clamping frame. When rotary conveying is conducted on the bagged ham sausage by the rotary receiving rollers, protruding strips between every two adjacent rotary receiving rollers are mutually supported in a clamped mode and rotate in a swinging mode, and the rotary receiving rollers are driven by the multiple protruding strips to conduct mutual transmission; and the rotary receiving rollers are matched with the multiple protruding strips to improve the frictional resistance of the bagged ham sausage while it is ensured that the rotating speed of the rotary receiving rollers is smoother and evener, so that rotary conveying of the ham sausage is more efficient and thorough, the device is convenient to operate, and connection of the components is flexible.

The invention discloses a fan rotating method of a solar outdoor fan umbrella. The method specifically comprises two methods: (1) a rotating method of a wind blowing fan; and (2) an electricity taking method of a rotating motion. The invention further discloses a fan rotating device of the solar outdoor fan umbrella. The device comprises a fixed base, a rotating main shell, a rotating motor, a wind blowing fan, a fixed tooth ring, a rotating circuit board, a fixed circuit board, a rotating control button and a wind blowing control button, wherein the fixed circuit board takes electricity from solar energy or an external power supply; the rotating circuit board is contacted and electrified with a circular rail of the rotating circuit board through an electric conducting elastic piece of the fixed circuit board; the wind blowing fan and the rotating motor fixed on the rotating main shell are connected and electrified with the rotating circuit board through leads; and when a rotating control button and a wind blowing control button are pressed down, the wind blowing fan rotates to blow wind. In conclusion, the device are simple in manufacturing, are stable and reliable in fan rotation, are simple and convenient in electric conducting mode, are long in service life, and are high in cost performance.

The invention belongs to the technical field of communication and radar antenna system components. The invention discloses an L-shaped ultra-wideband waveguide rotary joint, a control system, a control method and application, a coaxial transition structure is adopted, and an arc surface periodic metal convex body array with embedded balls is matched with a cylindrical shielding cavity at the coaxial transition part to form rotatable coaxial transition of an electromagnetic band gap structure type; electromagnetic shielding is achieved through the electromagnetic forbidden band characteristic of an electromagnetic band gap structure, electromagnetic signal transmission to the position between an upper waveguide and a lower waveguide is achieved through broadband terminating type and orthogonal type coaxial-waveguide conversion, and an L-shaped waveguide rotating joint is formed in cooperation with a bearing. According to the invention, a ball supporting type rotatable electromagnetic band gap structure is constructed at a rotating part, so that high electromagnetic transmission performance of the rotating joint in an ultra-wideband range is ensured while stable rotation is realized,and certain wear resistance can be realized under a proper size; meanwhile, the power capacity and the mechanical structure reliability of the rotary joint are improved through the ball-supported contact structure.

The invention discloses a rotating mechanism for a bidirectional dynamic pressure measurement sensor. The rotating mechanism comprises a connecting base (1), a cavity (2) and a sampling part (5), wherein the upper part of the connecting base (1) is connected with a fluid pressure sensor; the top part of the cavity (2) is fixed with the bottom part of the connecting base (1); the top part of the sampling member (5) is movably connected with the bottom part of the cavity (2), so that the sampling part (5) can rotate in the horizontal direction relative to the cavity (2); and a vertical partitionplate (3) is arranged in the cavity (2) and used for dividing the interior of the cavity (2) into two isolated parts, two guide pipes (4) are fixed to the sampling component (5) in the vertical direction, the upper end of each guide pipe (4) extends into one of the two parts of the cavity (2), and the lower ends of the guide pipes (4) are connected with fluid pressure sampling openings respectively. The rotating mechanism is simple and compact in structural form, is convenient for installation and angle adjustment, and is further convenient for static pressure, differential pressure, flow velocity, flow and other sensor applications based on the dynamic pressure measurement principle.

The invention relates to a warning lamp and the rotating mechanism thereof. The warning lamp comprise a base pipe (1) and a connecting pipe (2) which are matched in an inserted mode, wherein a plurality of inserted connection teeth (1.3) are arranged at the pipe opening end of the base pipe (1), inserted connection grooves (2.3) allowing the inserted connection teeth (1.3) to be inserted therein are formed in the pipe wall of one pipe opening end of the connecting pipe (2), and the other pipe opening end of the connecting pipe (2) is sealed with a sealing cover; a stop block (1.1) is mounted at the end part of a pipe orifice of the base pipe (1); a limiting stop block (3) is arranged in the base pipe (1) in a sliding mode, one end of the connecting rod (4) is connected with the limiting stop block (3), the other end of the connecting rod (4) is connected with a sealing cover of the connecting pipe (2), and an elastic piece (5) is arranged between the limiting stop block (3) and the stop block (1.1). According to the warning lamp, a mechanical adjusting mode is adopted, rotating adjustment and positioning are very convenient, the structure is simple, manufacturing cost is low, and market competitiveness of products can be improved.

The invention discloses a multi-stage combined type efficient crushing cutter set for a flour mill, and belongs to the field of flour milling machinery. The multi-stage combined type efficient crushing cutter set comprises a first-stage crushing cutter set body, a second-stage crushing cutter set body and a third-stage crushing cutter set body which are sequentially and coaxially arranged, the first-stage crushing cutter set body and the second-stage crushing cutter set body are oppositely and fixedly arranged, and a sieve tray is arranged between the first-stage crushing cutter set body and the second-stage crushing cutter set body. And the rotation directions of the third-stage crushing cutter group and the second-stage crushing cutter group are opposite. According to the pulverizer, efficient pulverizing of materials is achieved through cooperation of the multiple stages of pulverizing cutter sets, the first-stage pulverizing cutter set pulverizes the materials and then filters the materials through the sieve tray, fine particles are further pulverized through the second-stage pulverizing cutter set and the third-stage pulverizing cutter set, the material pulverizing efficiency can be higher, the materials are pulverized more densely, and the energy consumption of the pulverizer is lower; moreover, after the sieve tray is used for filtering, the second-level crushing cutter set and the third-level crushing cutter set only need to crush fine particles, abrasion to crushing blades is smaller, and the service life of the second-level crushing cutter set and the service life of the third-level crushing cutter set are longer.

The invention discloses a multi-response falling centrifugal ejection arc extinction device which mainly comprises a lightning protector shell, an arc extinction rotating disk, a conducting metal plate, a starting rod, a clamping rod, an induction coil, an arc extinction cylinder and a counting pointer. The arc extinction rotating disk is mounted in the lightning protector shell, a flat spiral spring is arranged at the middle of the arc extinction rotating disk and pushes the arc extinction rotating disk to rotate, the arc extinction rotating disk is provided with a plurality of air pill placing holes along a peripheral direction, a rifling is arranged on the inner side surface of each air pill placing hole, arc extinction air pills are placed in the air pill placing holes, one side of each arc extinction air pill is provided with a triggering electrode and a groove, one end of the triggering electrode is connected with one triggering end of the arc extinction air pills through a lead,the other end of the triggering electrode extends out of the edge of the arc extinction rotating disk, and the other triggering end of the arc extinction air pills is connected with a metal conducting sheet through a lead. The device is simple in structure, reasonable in design, high in arc extinction capability and stable and reliable in working, and the arc extinction air pills are rapidly andconveniently replaced.

The invention provides a screen printing plate adjusting mechanism and a printing machine. The screen printing plate adjusting mechanism comprises a base, a guide structure, a mounting plate and a driving device. The guide structure is arranged on the base. The mounting plate is movably connected with the base through the guide structure. The driving device at least comprises a stator end and a rotor end, the stator end is connected with the base, the rotor end is connected with the mounting plate, and the driving device drives the mounting plate to do arc-shaped motion along the guide structure. The driving device directly drives the mounting plate to perform angle adjustment, so that the transmission stage number is reduced, the angle adjustment error of the mounting plate is reduced, mounting stations for mounting other structures are omitted, the overall weight of the screen printing plate adjusting mechanism is further reduced, the gravity center of the screen printing plate adjusting mechanism can be effectively prevented from deviating, and therefore, the stability of angle adjustment is improved.

The present invention relates to metallurgic technology, and is one externally heating process prismatic magnesium smelting reducing tank. The magnesium smelting prismatic tank includes one outside prismatic tank comprising one prismatic cylinder, two sealing heads and reinforcing hoops, one circular cylinder inside the prismatic tank, two end caps, one water cooling system and heat insulating boards between the prismatic tank and the circular cylinder. The prismatic tank and the circular cylinder can bear pressure caused by vacuum of 0.1-0.8 Pa. It is applied as the key apparatus for smelting magnesium. It has less deformation, long service life, low cost and convenient magnesium smelting operation.