70results about How to "Realize positioning installation" patented technology

The utility model discloses a deposition table for preparing a polycrystalline diamond film, and belongs to the technical field of chemical vapor deposition. A positioning groove for placing a substrate is formed in the top of the deposition table body; an annular isolation groove is formed in the edge of the bottom of the groove; and the annular isolation groove is used for isolating the edge of the substrate placed in the positioning groove from the deposition table body. A positioning groove for placing a substrate is formed in the top of a deposition table body, so that the substrate is positioned and mounted, and the edge of the placed substrate is separated from the deposition table body through an annular isolation groove in the edge of the bottom of the positioning groove, so that the edge of the substrate is prevented from being in contact with the deposition table body. Therefore, the influence of the edge effect of microwave discharge on the temperature of the substrate is effectively avoided, it is guaranteed that the difference between the edge temperature and the center temperature of the deposition table and the substrate is small, and the temperature requirement for preparing diamond films of the same grade is met.

The invention relates to the technical field of polishing equipment, in particular to a Yunlong paper polishing device which is characterized in that a portal frame is provided with a driving assembly, the driving assembly is provided with a rodless air cylinder, the movable end of the rodless air cylinder is fixedly provided with an electric telescopic rod, and the movable end of the electric telescopic rod is provided with a mounting plate; a polishing assembly is mounted below the mounting plate, a filtering assembly is mounted above the mounting plate, a polishing table is fixedly connected to the upper surface of the supporting table, a positioning assembly is mounted between the polishing table and the portal frame, and the polishing assembly comprises a second motor, a coarse polishing block, a fine polishing block and a switching mechanism; the second motor is mounted on the mounting plate, and the output end of the second motor is fixedly connected with a shell. According to the grinding device for the Yunlong paper, the switching mechanism is arranged, so that the grinding blocks with different precisions can be effectively switched under the condition that the equipment is not closed, the operations of coarse grinding and accurate grinding on the Yunlong paper are further realized, and the grinding efficiency of the Yunlong paper is favorably improved.

The deformation correction assistive device for the large-diameter thin-wall sectioning ring comprises a positioning base, a correction rod and an arc-shaped correction block, a plurality of sliding grooves are formed in the circumferential side of the positioning base, and electromagnetic mechanisms are installed on the inner sides of the sliding grooves; a plurality of cantilevers are arranged on the outer side of the positioning base along the peripheral side, supporting frames are arranged on the cantilevers in a sliding mode, and scale marks are arranged on the side walls of the cantilevers in the length direction; the correcting rod is slidably sleeved with the supporting frame, and a limiting protrusion is arranged on the correcting rod on the inner side of the supporting frame. One end of the correcting rod is connected with the arc-shaped correcting block, the other end of the correcting rod slidably extends into the sliding groove and is connected with the electromagnetic mechanism through a spring, and a magnet head corresponding to the electromagnetic mechanism is arranged at the end part of the other end of the correcting rod. The deformation correction size is accurately adjusted through the scale marks on the supporting frame and the cantilever, automatic correction is achieved through the automatic control electromagnetic mechanism, the correction accuracy and efficiency are effectively improved, and good practicability is achieved.

The present invention discloses a new energy ship positioning charging pile, and specifically relates to the technical field of charging piles. The present invention realizes the rotation of clamping blocks one and two on the outer surface of a charging connector through a rotating locking mechanism and the cooperation of a rotating cavity and a convex ring, thereby assisting the installation of the charging connector. The docking card block is aligned with the position of a docking card slot, and then the charging connector is inserted into a placement tube. The docking card block slides in the docking card slot to a position communicating with the arc-shaped card slot. The clamping block one and the clamping block two are rotated on the outside of the charging connector, so that the docking card block slides into the arc-shaped card slot, thereby assisting in fixing the charging connector and realizing the positioning installation of the charging connector. The locking column moves toward the direction of the sliding cavity, the rotating rod and the articulated seat rotate and pass through the through slot to reach between the two reset seats, and one end of the locking column enters the corresponding locking hole, thereby realizing the rapid assembly of the clamping block one and the clamping block two.

The utility model provides a welding tool for assembling a door plate and a welding plate, and belongs to the technical field of tools for assembling door plates. The problem that an existing door plate is prone to dislocation in the welding process is solved. The utility model discloses a welding tool for assembling a door plate and a welding plate. The welding tool comprises a support, an opening, a tool plate, a positioning plate, a limiting face, a pressing frame, the door plate, the welding plate and a surrounding plate. According to the utility model, when the door plate is arranged on the bracket, the end part of the coaming is positioned and mounted on the positioning plate, and the welding plate is positioned and mounted on the tooling plate, so that the door plate and the welding plate are positioned and mounted, and the door plate and the welding plate cannot be staggered and moved when a technician welds the door plate and the welding plate; therefore, the qualified rate of assembled door plates is improved.

The utility model relates to a valve core end face length screening detection tool, and belongs to the technical field of detection tools. The problems of low detection efficiency and low measurement precision when the length of the end surface of the valve core is measured by manually holding a length measuring tool in the prior art are solved. The valve element end face length screening gauge comprises a mounting plate, a first detection plate and a second detection plate, the first detection plate and the second detection plate are oppositely mounted on the mounting plate in parallel, and a valve element detection cavity is formed between the first detection plate and the second detection plate; and one of the first detection plate and the second detection plate is mounted at different positions of the mounting plate relative to the other detection plate to form detection stations with different detection lengths. The screening gauge does not need to measure the length, so that the workload of manual measurement is reduced, and the detection efficiency is high. According to the invention, whether the to-be-detected valve core is a qualified product is determined by using the standard valve core end face length, so that a length measuring tool does not need to be held by a hand for measurement during detection, and low detection precision caused by reading of measurement personnel is avoided.

The utility model discloses a connecting structure of a blower adapter, and aims to provide a blower motor cover buckling structure which is simple in structure and convenient to combine and install. Comprising a motor cover and an air outlet assembly connected with the motor cover, the motor cover and the air outlet assembly are connected with a blower body shell in a sleeved mode, the front end of the blower body shell is connected with an air outlet grating in a clamped mode, and the air outlet grating is connected with an air outlet decorating part in a clamped mode. The air blower has the advantages that parts at the air outlet of the air blower are simple in structure, assembling connection is completed in a clamping connection mode, and operation is easy and convenient; the air outlet assembly and the motor cover are clamped into the clamping grooves through the clamping blocks of the motor cover, positioning installation is achieved, it is guaranteed that installation is convenient, and operation is easy; the supporting ribs arranged on the outer wall of the air outlet assembly can guarantee the strength of the air outlet assembly, meanwhile, the connection stability of the air outlet assembly and the blower body shell can be improved, and operation is easy.

The electromagnetic brake comprises a brake disc, an armature, a stator, an electromagnetic coil and a compressed spring, the stator is provided with a stator inner cavity, a stator protruding column protruding towards the direction close to the armature is arranged in the middle of the cavity wall of one side of the stator inner cavity, and the stator protruding column is provided with a protruding column through hole. The electromagnetic coil is arranged in the stator inner cavity and sleeved on the stator protruding column, the compression spring is sleeved outside the stator protruding column and located in a central through hole of the electromagnetic coil, an armature protruding ring is arranged in the middle of the surface of one side of the armature, part or all of the armature protruding ring is arranged in the protruding column through hole, and the armature and the brake disc are both located in the stator inner cavity. The electromagnetic force of the electromagnetic coil to the armature is increased on the premise that the volumes of the electromagnetic coil and the brake are not increased, the requirements of small volume and large magnetic force can be met at the same time, enough distance between the armature and the stator can be ensured, the armature and the brake disc can be thoroughly separated when the brake is released, and the service life of the brake is prolonged. And friction noise between the brake disc and the armature is eliminated.

The utility model provides a projection screen speckle measuring device comprising a projector used for projecting images; the projection screen assembly comprises a mounting frame and a to-be-detected projection screen, the position of the mounting frame can be adjusted relative to the position of the projector, the to-be-detected projection screen is arranged on the mounting frame, and the to-be-detected projection screen is used for receiving the image; and the image acquisition unit is used for acquiring a display image of the projection screen to be detected. The projection screen speckle measuring device can measure and record speckles on the projection screen, and can provide basis for eliminating the speckles on the projection screen.

The utility model relates to the technical field of digital printing, and discloses a die for digital printing, which comprises a supporting surface and an abutting surface which are oppositely arranged, the supporting surface is used for supporting the inner surface of a bottom shell of a mobile phone shell and is completely matched with the inner surface of the bottom shell, the abutting surface is provided with a positioning hole, and the positioning hole is matched with the supporting surface. The positioning hole is used for being matched with a positioning pin on a transfer printing platform of a printing machine, and the supporting face is connected with the abutting face through a connecting face. According to the die, the supporting face and the abutting face which are opposite to each other are arranged, meanwhile, the locating holes matched with the locating pins are formed in the abutting face, when printing is needed, the mobile phone shell is sleeved on the die, then the locating pins are sleeved with the locating holes, the abutting face abuts against a transfer printing platform, and therefore locating installation of the mobile phone shell on the transfer printing platform is achieved. When the silica gel roller is pressed down for transfer printing, the mold plays a role in completely supporting the transfer printing face of the mobile phone shell, deformation and displacement of the mobile phone shell in the printing process are avoided, and the printing effect is guaranteed.

The utility model relates to the field of medical equipment, in particular to an anti-ray partition plate for nuclear medicine, which comprises a supporting seat, a partition plate body arranged at the upper end of the supporting seat, a mounting block arranged at the lower end of the partition plate body, a mounting groove formed in the upper end of the supporting seat, a storage groove formed in the lower end of the supporting seat, and a limiting plate arranged on the inner side of the storage groove. A screw rod is arranged at the upper end of the limiting plate, a lifting plate is arranged on the outer side of the screw rod, universal wheels are arranged on the left side and the right side of the lower end of the lifting plate, knobs are arranged on the front side and the rear side of the supporting seat, and a first bevel gear is arranged on the inner side of the supporting seat. The installation blocks are inserted into the installation grooves and fixed through the bolts, the partition plate body and the supporting base are rapidly assembled and fixed, the universal wheels are controlled to stretch out of the containing grooves by rotating the rotary knob on any side, the partition plate is conveniently pushed to move to a proper position, then the installation plates can be controlled to be attached to the ground by reversely rotating the rotary knobs, and the partition plate is convenient to use. The partition plate can be conveniently fixed to the ground, and overall positioning installation of the partition plate is achieved.

The utility model discloses an assembly type anti-explosion-wave valve which comprises a door frame, a valve body and a valve cover. The utility model relates to a novel wave-absorbing valve door, which comprises a door frame, a positioning side plate, a positioning groove, a limiting groove and a fixed positioning block, mounting openings are symmetrically formed inside the door frame, mounting frames are mounted on the inner sides of the mounting openings, and a wave-absorbing valve body is mounted inside the mounting frames. The novel wave-absorbing valve door has the advantages that by arranging the positioning side plate, the positioning groove, the limiting groove and the fixed positioning block, the novel wave-absorbing valve door can be conveniently mounted; by arranging the mounting side grooves and the mounting side plates, positioning mounting between the positioning side plates and the positioning grooves at the top and the bottom of the mounting frame and matched limiting between the limiting grooves and the fixed positioning blocks are achieved, the mounting frame is subjected to limiting mounting treatment on the inner side of the mounting opening, and by arranging the mounting side grooves and the mounting side plates, positioning mounting between the mounting side grooves in the two sides and the mounting side plates is achieved; the mounting side grooves are stably mounted on the inner sides of the mounting side plates through bolts, and the mounting positions, on the inner sides of the mounting openings, of the mounting frames are stabilized.

The present invention relates to the technical field of manipulators, and specifically to an adjustable arm for an industrial robot, comprising a first manipulator arm and a robot body on which the first manipulator arm is installed, wherein a second manipulator arm is hingedly connected to the first manipulator arm, a support plate is fixedly arranged on the second manipulator arm, an electric telescopic rod is fixedly installed on the support plate, a movable connecting ring is fixedly installed on the electric telescopic rod, and a first protective plate and a second protective plate are installed on the second manipulator arm. When an atomizing nozzle is in a non-working state, the first protective plate and the second protective plate are closed together, which can provide good protection for the atomizing nozzle. When the atomizing nozzle is in a working state, the first protective plate and the second protective plate are separated from each other, which can ensure that the atomizing nozzle works normally while the first protective plate and the second protective plate are located outside the atomizing nozzle, and can also provide a certain protection for the atomizing nozzle, thereby ensuring that it can be used safely.

The present invention discloses a multi-node server data processing device, which relates to the technical field of multi-node servers; it comprises a service cabinet and a plurality of server units, the service cabinet is provided with a cabinet slot for installing a plurality of server units, and a heat dissipation and noise reduction component is installed on the service cabinet; a plurality of support frames are fixedly installed in the cabinet slot, and the server units are placed on a plurality of support frames at the same height through the installation components, and a heat conduction and noise reduction component matched with the heat dissipation and noise reduction component is installed on the server units. The advantages are: under the premise of satisfying the overall required heat dissipation, the vibration and noise generated by air cooling in the device are effectively reduced, the protection of the working environment of the server nodes is improved, and the accuracy of the work of the server nodes is improved.

The utility model relates to the technical field of hobbing cutter tooth detection, and discloses a hobbing cutter tooth toughness defect rapid detection device which comprises an equipment shell and a rotating table, and a limiting groove is formed in the top of the rotating table. According to the rapid detection device for the tooth toughness defect of the hobbing cutter, under the action of force, one attaching arc-shaped block gets close to the other fixed attaching arc-shaped block through potential energy of a damping rod and a spring, meanwhile, a guide column slides in a positioning sleeve shell in a guiding mode, and a guide rod on the side face of the attaching arc-shaped block slides in a clamping groove formed in the fixing sleeve shell; then positioning of the hobbing cutter teeth is completed through potential energy of the damping rod and the spring, then the tough defects are rapidly detected through laser of the laser detection probe fixedly installed in the connecting cover, and positioning and installation of the hobbing cutter teeth can be rapidly achieved in the whole operation process; and the hobbing cutter teeth with different inner diameter sizes can be correspondingly matched for use, and the overall adaptability is higher.

The utility model discloses an electric connector, including electric connection subassembly, electric connection subassembly includes flexible circuit board and base, the flexible circuit board includes body part, butt -joint part and tail, butt -joint part connects body part with tail, butt -joint part is around the both sides of base thickness direction, body part with tail is located the both sides of base thickness direction, at least one of body part with tail is equipped with through -hole, and the base is equipped with the positioning column of wearing in through -hole, so setting, realize flexible circuit board and base positioning installation, and it is favorable to flexible circuit board and base assembly in place.

The utility model belongs to the technical field of boring cutters, and particularly relates to a tool-setting-free boring cutter with a rear positioning function, aiming at solving the problems that an existing clamping position is parallel to the central axis of a handle part, and the surface of a handle is not provided with a positioning guide component. In order to solve the problem that when a handle part of a boring cutter is installed in a clamp of a numerical control grinding machine, the handle part of the boring cutter needs to be rotated in the handle part to enable a clamping position to correspond to a clamping block in the clamp, so that the boring cutter can be stably clamped, the following scheme is provided: the boring cutter comprises a cutter handle, one end of the cutter handle is provided with a positioning installation groove, and two sides of the positioning installation groove are provided with clamping grooves; a first magnetic attraction block is fixed into the cutter handle. The cutter handle is placed in the mounting hole through the positioning mounting groove and the positioning mounting block, then the first magnetic attraction block is actively attracted through the second magnetic attraction block, the positioning rod and the positioning groove are connected in an inserted mode, positioning mounting between the cutter handle and the mounting base is achieved, after the cutter handle is mounted, it can be avoided that the cutter handle is rotated again to enable the clamping groove to correspond to the clamping block, and the machining efficiency is improved. And the clamping block can clamp the clamping groove conveniently, and the effect of tool setting is achieved.

The utility model relates to the technical field of lining polytetrafluoroethylene pipeline, disclose a kind of steel lining polytetrafluoroethylene pipeline elbow, including elbow body, the inner wall of elbow body is fixedly connected with inner lining pipe, the inner wall of inner lining pipe is fixedly connected with flow guide uniform distribution disc, the outer wall of press bar is fixedly connected with limit disc, the outer wall of first outer ring is fixedly connected with limit plate, the outer wall of limit plate is slidably connected with second outer ring, the inner wall of second outer ring is fixedly connected with pipeline body, the inside of pipeline body is provided with dismounting assembly, and the dismounting assembly is used to remove the connection of pipeline. In the utility model, through the cooperation between elbow body, inner lining pipe, press bar, limit disc and first spring, the effect of quick dismounting and installation of elbow is achieved, which is beneficial to quick positioning and installation, and meets the efficient construction needs of chemical industry, corrosion prevention and other scenes, and achieves the effect of greatly shortening construction period.

The utility model provides a kind of umbrella cover assembly of outdoor sunshade, the outdoor sunshade has umbrella handle and umbrella rib, the umbrella cover assembly includes: umbrella disc, the umbrella disc is provided with multiple umbrella rib mounting parts in circumferential side, the umbrella rib mounting part is used to connect the umbrella rib;Umbrella disc support, the umbrella disc support is used to sleeve joint to the umbrella handle, the umbrella disc support is detachably connected with the umbrella disc;The umbrella disc support includes: axially connected supporting portion and sleeve joint portion;The outside of the sleeve joint portion is used to sleeve joint the umbrella disc;The side of the supporting portion close to the sleeve joint portion is supporting surface, for abutting the umbrella disc.The utility model solves the problem that the umbrella cover assembly of outdoor sunshade with different number of umbrella ribs needs to be made separately, and more molds are needed accordingly.

The utility model relates to the technical field of aluminum casting equipment, in particular to an improved mold core fixing plate, which is characterized in that two extension plates are fixedly connected to two sides of a bottom plate, a lower mold is fixedly connected above the bottom plate, a plurality of quick core fixing mounting structures are arranged on the outer side of the bottom plate, a plurality of threaded columns are in threaded connection with the inner sides of a plurality of rotating sleeves, and the outer side of each rotating sleeve is provided with a plurality of fixing holes. The front ends of the multiple threaded columns are in threaded connection with multiple extension shafts, and the inner sides of the multiple extension shafts are rotationally connected with multiple clamps. According to the improved mold core fixing plate, clamping rods on the two sides are wrenched along a rotating shaft, the clamping rods can move to the position above a top plate, a rotating sleeve is manually rotated to be screwed, the clamping rods on the inner side of an extension shaft can tighten and fix the top plate to the position above a mold to achieve positioning installation, an external overturning and locking structure is utilized, and the mold core fixing plate is convenient to disassemble and assemble. Therefore, the top plate drives the upper mold and the lower mold above the bottom plate to realize stable positioning and mold closing installation, and the working quality of the improved mold core fixing plate is improved.

The ultralow-temperature air energy heat pump controller comprises a controller body, a bottom box and a top cover are arranged on the outer walls of the upper side and the lower side of the controller body, a circuit board is arranged in the bottom box, and a PLC is installed in the center of the outer wall of the top of the circuit board; a data acquisition module, an AI control module and an air energy heat pump driving control module are distributed and installed on the outer walls of the two sides of the top of the circuit board, a data transmission module and a temperature setting module are installed on the outer wall of the top of the circuit board, a mobile terminal is arranged outside the controller body, and assembling clamping assemblies are arranged on the outer walls of the four corners of the bottom box and the top cover. The AI control module can learn use habits and environment change rules of users through machine learning and big data analysis technologies, and intelligent control over the ultralow-temperature air energy heat pump is carried out; and an operation plan of the heat pump is automatically adjusted, and a user can remotely perform driving control on the ultralow-temperature air energy heat pump through cooperation of the temperature setting module and the mobile terminal.

The utility model relates to the technical field of casting molds, and discloses novel cylinder body hoisting equipment which comprises an operation table, a supporting frame is fixedly connected to the top of the operation table, and servo motors are fixedly connected to the left side and the right side of the supporting frame. The output ends of the two servo motors penetrate through the left side and the right side of the supporting frame and are fixedly connected with rotating shafts, the outer walls of the two rotating shafts are fixedly connected with a plurality of take-up barrels, lifting ropes are arranged on the outer walls of the multiple take-up barrels, and the other ends of the multiple lifting ropes are fixedly connected with lifting rings. According to the utility model, the positioning inserting plates on the two sides of the top die are inserted into the connecting plate, the servo motor is started to drive the top die to slide onto the bottom die, and the top die is connected into the positioning plate through the positioning inserting plates, so that the operation is convenient and more accurate, and the adjusting plate is adjusted according to the width of the bottom die; and then the reinforcing bolts are rotated inwards to reinforce the adjusting plates, so that the firmness of the bottom die is improved.

The utility model relates to the technical field of connecting shaft fastening, in particular to an anti-disengagement improved connecting shaft fastening assembly which comprises a connecting shaft body, a taper pin, a check ring and a fastener. A pin hole for the taper pin to be inserted is formed in the bottom wall of the mounting ring groove in the radial direction of the connecting shaft body in a penetrating mode, the inner circumferential wall of the check ring abuts against the end face of the taper pin, and the fastener is arranged on the check ring in a penetrating mode and locked to the connecting shaft body in a threaded mode. The connecting shaft body is provided with the mounting ring groove for positioning and clamping the retainer ring, the possibility that the retainer ring slides in the axial direction of the connecting shaft body is effectively reduced, the retainer ring and the connecting shaft body are fixed by additionally arranging the fastener, and the structural stability between the retainer ring and the connecting shaft body is improved; the possibility that the taper pin is separated from the pin hole due to the fact that the retainer ring is forced to be separated from the connecting shaft body due to enhanced vibration of the taper pin is effectively reduced.

The utility model discloses a kind of urban gas engineering pipeline support devices, including L-shaped main support, still include, height adjusting structure is set to the inside of L-shaped main support vertical pole, pipeline locking structure is set to the inside of L-shaped main support horizontal pole, the surface of the L-shaped main support vertical pole is equipped with locking guide slot, the side of the L-shaped main support vertical pole is equipped with side guide slot symmetrically, the surface of the L-shaped main support horizontal pole is equipped with U-shaped groove.The utility model provides a kind of urban gas engineering pipeline support device, by setting height adjusting structure, positioning piece is first fixed with wall surface when installation, by the suspension connection of L-shaped main support and positioning piece, and then realize the quick adjustment of the overall height of L-shaped main support, cooperate with the locking of positioning threaded rod to L-shaped main support can be realized, and then the purpose of the quick adjustment of the overall height of L-shaped main support can be realized.

The utility model discloses a cold storage cabinet convenient to maintain, including the cabinet body and setting in the cavity of cabinet body and having one side opening, detachably connected with the fender at the cavity opening, its characterized in that: the flange is equipped with the locating post in the cavity inside and is located close to its opening lower side, the flange is equipped with the locating post, the fender one side extends and can be hung with the flange and hang the joint part, the joint part is opened and is equipped with the perforation, the locating post cooperation is inserted in the perforation. Through the hanging cooperation of joint part and flange, and the insertion of locating post and perforation are combined, form the double restraint of vertical direction and horizontal direction, realize the positioning installation of fender relative cabinet body, avoid the fender to shake before and after, and the fender can only be disassembled to the upward direction relative cabinet body.

The present invention discloses an electric toothbrush, characterized in that it comprises: a brush handle (1), wherein the brush handle (1) has an upper end (11) and a lower end (12) of the brush handle, an internal chamber (10) is arranged inside the brush handle (1), and a cover (2) is arranged outside the brush handle (1); a brush head (3) connected to the upper end (11) of the brush handle (1), and a plurality of bristles (31) are arranged on the brush head (3). The electric toothbrush is provided with a cover on the handle, so that the light emitted from the signal indicator light is reflected and refracted multiple times between the outer wall of the handle and the cover, forming a good light and shadow effect, making the toothbrush handle more three-dimensional and shortening the distance between the electric toothbrush and the user.

The invention relates to the technical field of detection devices, in particular to a grinding machine feeding precision detection device which comprises a laser interferometer body, and positioning matching blocks are symmetrically and fixedly arranged on the two sides of the laser interferometer body; the lower end of the interference mirror is fixedly provided with a mirror body bearing seat; the reflecting mirror is aligned with the interference mirror and the laser interferometer body when the grinding machine feeding precision is detected, and the interference mirror is located between the reflecting mirror and the laser interferometer body; the laser interferometer body and the interference mirror are supported by the tripod, so that the laser interferometer body and the interference mirror can be positioned and mounted synchronously when the feeding precision of the grinding machine is detected, the laser interferometer body and the interference mirror are aligned, fixing operation and alignment operation do not need to be performed one by one, the operation is very convenient, the operation is simple, and the efficiency is high. And the installation efficiency of the detection part is greatly improved.

The utility model discloses a power switch capable of effectively extinguishing an arc, which comprises a base, insulators are symmetrically arranged at the top of the base, a moving contact seat is fixedly arranged at the top end of the insulator at one end, a static contact seat is fixedly arranged at the top end of the insulator at the other end, a connecting seat is fixedly arranged on the moving contact seat, and the static contact seat is fixedly arranged on the connecting seat. A switch blade is rotatably connected in the connecting seat, a butt joint seat is fixedly installed on the static contact seat, a positioning installation mechanism is installed in the static contact seat, and the positioning installation mechanism is connected with an arc extinguishing cover. According to the power switch capable of effectively extinguishing the arc, the knife switch can rotate in the connecting seat on the moving contact seat so as to realize conduction and power-off work, and the arc extinguishing cover is arranged so as to perform arc extinguishing work on the electric arc generated in the separation process of the knife switch and the butt joint seat; and the arc extinguishing chamber can be conveniently disassembled, assembled and replaced through the arrangement of the positioning installation mechanism.