140results about How to "Avoid Disengagement Situations" patented technology

The invention provides a graded image retrieval method based on deep features of a convolutional neural network. According to the basic principle, the method comprises the steps of firstly, training the convolutional neural network used for feature extracting, and determining network parameters; then using the trained convolutional neural network to extract image features, and obtaining multiple convolutional layer binary system features and one full-joint layer binary system feature; secondly, applying the convolutional layer binary system features to a preliminary screening retrieval stage,conducting multi-feature similarity fusion after further compressing the features, sifting out a candidate image set, and reducing the retrieval range; finally, using the full-joint layer binary system feature to accurately retrieve the candidate image set to obtain a final retrieval result. As is shown by an experiment result based on a public image retrieval dataset, compared with an existing image retrieval method, the representing mode of the images of the graded image retrieval method is more comprehensive, a feature compression method is simpler and more efficient, and the retrieval accuracy is high; meanwhile, by means of a graded retrieval mode, the system calculation amount is dispersed, parallel accelerating is achieved, and the graded image retrieval method has practical value.

The invention relates to a liner with better sealing performance and convenient installation and use, in particular to a furnace door liner with a structure connected end to end. The furnace door liner comprises a female head and a male head, wherein, the male head extends in the female head; and a spring clip penetrates through the adjacent side wall of the female head and the male head. Both thefemale head and the male head are formed by a glass-fiber tube and a mesh tube shaped framework arranged in the glass-fiber tube; and the mesh tube shaped framework is clamped in the first double-layer part of the female head. The spring clip is formed by a paper clip shaped horizontal base and a diamond meshing clip vertically arranged on the horizontal base, and a free end is formed on the horizontal base; the horizontal base penetrates through the first double-layer part of the female head and the side wall of the male head in sequence from the outside to the inside through the free end, so that the horizontal base of the spring clip is placed in the mesh tube shaped framework of the male head, and meanwhile, the diamond meshing clip of the spring clip protrudes outwards from the glass-fiber tube of the male head. A high-temperature resistant adhesive tape is bound at the tail end of the male head or a metal restricted opening is fixed at the tail end of the male head.

The invention provides a packaging method for an image sensor chip and a packaging structure. The packaging method comprises the steps as follows: a wafer is provided; the wafer comprises a first surface and a second surface opposite to the first surface, and comprises the image sensor chip which is formed by arranging a plurality of grids; the image sensor chip comprises an image sensor region and a boning pad; the image sensor region and the boning pad are located on the first surface of the wafer; an opening which extends towards the first surface is formed in the second surface of the wafer, and exposes the bonding pad; a V-shaped cutting groove which extends towards the first surface is formed in the second surface of the wafer; a photosensitive ink coats the second surface of the wafer, so that the V-shaped cutting groove is fully filled with the photosensitive ink; the photosensitive ink covers the opening; and a hollow cavity is formed in the opening. The hollow cavity is formed in the opening, so that the condition that a re-wiring layer is separated from the bonding pad is effectively avoided; the packaging yield of the image sensor chip is improved; and the reliability of the packaging structure of the image sensor chip is improved.

The invention discloses an easy-to-radiate chip packaging structure and a packaging method thereof, and belongs to the technical field of electronic components. The easy-to-radiate chip packaging structure is characterized by comprising a lower box body, wherein an upper box body is clamped to the top of the lower box body, two clamping devices are arranged on each of the two sides of the lower box body, the clamping device penetrates through the lower box body and is connected with the upper box body in a clamped mode, a mounting assembly is fixedly connected to the inner bottom wall of the lower box body, and a chip body is arranged on the inner bottom wall of the mounting assembly. According to the invention, by arranging a pushing device, when a chip body works, a cover plate can be driven to ascend to generate deformation, so that conversion can be carried out according to the working condition of the chip body, sealing and dust prevention are achieved when the chip body does notwork, dust is prevented from entering the chip body, heat dissipation is carried out in time when the chip body works, the heat dissipation effect is good, and the service life of the device is prolonged; and through holes in the surface of the pushing device can drive the cover plate to move up and down, so that and flowing of air between the upper box body and the lower box body can be accelerated, and heat dissipation effect is better.

The invention discloses a motor with a damping function. The motor comprises a motor body, wherein a body is arranged in the middle of the motor body, the outside of the middle of a limit column is sleeved with a first damping spring, second damping springs are mounted at two ends of the limit column, a cooling water pipe is mounted on one side of a protection baffle, and positions, located on twosides of a pull rod, of a mounting shaft are symmetrically wrapped with clearing cloth. The motor is scientific and reasonable in structure and safe and convenient to use, transverse shock wave energy of the motor is reduced under the action of a first damping spring and a second damping spring, the condition that a mounting seat and the body are separated due to transverse shock of the motor isavoided, and meanwhile, breakage and damage of bolts due to shear stress can be avoided; a baffle plate is used for stably driving air near cooling fins to flow, so that flowing air exchanges heat with the cooling fins effectively, and the problems that existing cooling fin structures are single and air attached to the surfaces of the cooling fins cannot flow effectively are solved.

The invention provides a paperboard pasting magnetic dispensing structure. The structure comprises a mounting platform, the mounting platform is respectively provided with an adhesive dispensing mechanism, a magnetic sticking structure and a rotary material table structure; the rotary material table structure comprises a rotary motor A, a rotary shaft, four material platforms, the rotating motor A is fixedly arranged on the mounting platform, the rotating shaft is fixedly connected with the power output end of the rotating motor A, the four material platforms are fixedly connected with the upper part of the rotating shaft in a circumferential array manner; a heating rod is arranged in each material table; the magnetism sticking structure comprises a support A, a rotating structure, a lifting structure, a material storage cylinder and a magnetic pressing structure, the rotating structure comprises a rotating motor B, a rotating table and a U-shaped connecting arm; the lifting structure comprises a lifting motor A, a lifting shaft A and a pressing block; the magnetic sticking structure comprises a lifting motor B, a lifting shaft B, a mounting plate and a magnetic pressing arm. According to the paperboard pasting magnetic dispensing structure, after the magnet is attached to the glue, the magnet is immediately pressed, the heating rod is added for heating, the drying speed of the glue is improved, the situation that the magnet is separated is effectively avoided, and the reworking probability is reduced.

The invention relates to the field of machining, and discloses a grinding device. The grinding device comprises a base table, a supporting column is fixedly installed on the right side wall face of the base table, an equipment box is fixedly installed at the top of the left side wall face of the supporting column, driving control equipment is arranged in the equipment box, and an operation ball is arranged at the bottom of the equipment box. A connecting shaft is arranged at the top of the operation ball, the connecting shaft penetrates through the bottom wall face of the equipment box and is fixedly connected with an output shaft of the driving control equipment in the equipment box, a fixing plate is arranged at the bottom of the operation ball, and the fixing plate is in a semispherical arc plate shape. According to the grinding device, through a connecting groove and a connecting ball of the connecting part of the operation ball, when the operation ball carries out rotary grinding operation, the operation ball can move in a non-limiting mode, so that a ground object is adjusted in the fixing plate in an adaptive mode, the ground object can be adjusted in a self-adaptive mode in the grinding operation, and the grinding efficiency and quality are improved.

The invention relates to a roller assembly and a rolling rotor compressor. The roller assembly comprises a roller and a slider, the roller can eccentrically move in a cylinder body, the front end of the slider is adsorbed to the periphery of the roller by magnetic force, the rear end of the slider can be inserted in the sidewall of the cylinder body, and a suction cavity and an exhaust cavity areformed in the cylinder body. Thus, as the roller eccentrically moves in the cylinder body, the front end of the slider always abuts against the periphery of the roller, the situation of the slider separating from the roller cannot occur, so that the situation of capacity fluctuation is effectively prevented, and thereby the overall operating performance is increased.

The present invention relates to a color wheel. It is composed of several filters, at leas a drive device and at least a fixed ring, in which the filters are uniformly placed around the drive device, and the fixed rings are placed around the periphery of the filters so as to make the filters be formed into a specific form.

A rehabilitation training device for lower limb exoskeleton joints comprises a control mechanism, a driving motor, a transmission assembly, a limiting assembly, a knee joint inner fixing plate, a knee joint outer fixing plate and a thigh bone straight plate. The transmission assembly comprises three bevel gears, a thrust ball bearing and a deep groove ball bearing, so that stable transmission of a driving motor is achieved. The limiting assembly comprises limiting grooves formed in the boundaries of the thigh bone straight plate and connecting shafts detachably connected to lug plates. A user can adjust the connecting and mounting positions of the connecting shafts on the lug plates to define the limiting position where the thigh bone straight plate makes circular arc movement through matching of clamping of the connecting shafts and the limiting grooves. The device is simple in overall structure, stable in driving and convenient to use; stability can be well met when the lower limb exoskeleton joints are driven, the limiting adjustment effect is achieved, and safety and convenience are met when the user uses the rehabilitation training device so that the user can be treated effectively and scientifically.

The invention discloses a 5G communication signal sensor with an anti-theft function, which structurally comprises a signal receiving box, a support rod and a base, the support rod is embedded and fixed at the upper end of the base, the signal receiving box is connected with the support rod, and the inner swing plate can swing downwards along an external connection plate through the impact of windand dust on the inner swing plate on the signal receiving box. Therefore, sand wind can be directly buffered against the inner swing plate, the situation that the surface of the signal receiving boxis impacted by the sand wind for a long time, and an anti-oxidation paint layer is impacted by the sand wind to be disengaged is effectively avoided, and when the sand wind wetted by rainwater pushesthe swing block, the upper connecting plate can fully absorb moisture on the sand wind; and the upper surface of the upper connecting plate can extrude wind and sand through extrusion of the elastic ring to the upper connecting plate, so that the wind and sand can be firstly attached to the outer surface of the upper connecting plate.

The invention relates to the technical field of cosmetics, in particular to a drawer type cosmetic packaging box. The drawer type cosmetic packaging box comprises a device body, wherein the device body comprises an outer packaging box, a storage drawer is inserted into the outer packaging box, a second rotating shaft is fixedly installed on one surface of the outer packaging box, and an overturning plate is movably installed on the second rotating shaft. According to the drawer type cosmetic packaging box, through arrangement of fixing blocks, first compression springs, clamping blocks, pressing rods and second compression springs, during installation, the storage drawer is inserted into the outer packaging box; when the storage drawer is inserted into a certain position, the fixing blocksare in contact with the clamping blocks; due to the fact that one end of each of the clamping blocks is in a slope shape, when the fixing blocks extrude the clamping blocks, the clamping blocks extrude the first compression springs and move outwards; and when the storage drawer is inserted into a certain position, the fixing blocks are clamped with the clamping blocks, so that the storage draweris fixedly connected with the outer packaging box, and the circumstance that when the device moves or is transported, the storage drawer moves in the outer packaging box and then is separated from theouter packaging box is avoided.

A P-type PERC double-side solar cell alignment printing method, a preparation method and a battery are disclosed. A Mark 1 point is arranged on a back laser slot pattern, a back laser slot region withthe Mark 1 point is made on a silicon wafer, a mark 2 point is arranged on a back pole main gate line screen plate, and a back pole main gate line with the Mark 2 point is printed on the silicon wafer; the Mark 1 point on the silicon wafer is used, by adjusting the position of the silicon wafer, the back laser slot region is aligned with the back aluminum gate line on the back aluminum gate linescreen plate, and the back aluminum gate line on the back aluminum gate line screen plate is aligned with the back main gate line by moving the silicon wafer transversely by using the Mark 2 point, and the back aluminum gate line is printed, so that the back aluminum gate line covers the back laser slot region and is connected with the main gate line. The invention ensures the effective connectionbetween the back aluminum gate line of the silicon wafer and the back electrode main gate line, avoids the disconnection between the back aluminum gate line and the back electrode main gate line, andeffectively reduces the defective rate of the double-sided PERC solar cell.

The embodiment of the invention discloses a converter and a transmission system, which are used for effectively ensuring successful signal transmission between network equipment and terminal equipment. The converter is used for being connected with a first cable. The first cable is a photoelectric composite cable. The first cable comprises an optical fiber used for transmitting an optical signal with a passive optical network PON protocol format and a first power transmission line used for transmitting a first power supply current, wherein the first power transmission line is connected with the conversion unit, the conversion unit is further used for being connected with a data interface, and the data interface is used for transmitting an electric signal with a target protocol format.

The invention discloses novel dust collecting environment-friendly filter cloth which comprises a filter cloth body. The filter cloth body comprises a filter cloth layer which is arranged horizontally. An elastic cloth connecting ring is arranged on the side wall around the filter cloth layer, a first frame body is horizontally arranged at the lower end of the filter cloth body, a first groove ring is formed in the upper end of the first frame body, a second frame body is horizontally arranged at the upper end of the filter cloth body, a first protruding ring is arranged at the lower end of the second frame body, the first protruding ring and the first protruding ring are clamped, and the elastic cloth connecting ring is located at the clamped part of the first groove ring and the first protruding ring. The novel dust collecting environment-friendly filter cloth provided by the invention is quite simple to detach, free of any tools and suitable for single-layered filtration and multi-layered filtration, and has relatively high practicality and applicability.

The invention discloses a lathe fixture used for machining a pump. The lathe fixture used for machining the pump comprises a mounting base and a mounting board; an adjusting groove is formed in the mounting base and internally provided with a slide rod; the mounting board is welded to one end of the slide rod; a mounting rod is installed on the mounting board through a rivet; a mounting groove isformed in an inner cavity of the mounting rod; a spring is fixedly connected to the bottom of the mounting groove; one end of the mounting rod is connected with a telescopic rod; one end of the telescopic rod extends into the mounting rod; the telescopic rod and the inner wall of the mounting rod are in sliding connection; and a clamping board is installed at the other end of the telescopic rod. Through arrangement of the T-type slide rod, it is ensured that the mounting board moves and is adjusted in the direction of the adjusting groove, the mounting board is not disengaged from the mountingbase, the situation that the mounting board is disengaged is avoided, at the same time, in the actual use, the position of an adjusting board is fixed and adjusted through a locking device, then theposition of the mounting board is adjusted and fixed conveniently, and the fixture adaptability is improved.

The invention relates to the technical field of welding pretreatment devices, and discloses a pretreatment device used before metal pipeline welding operation. The pretreatment device comprises a containing base, a supporting block is slidably connected to the upper surface of the containing base, and a rotating block is rotationally connected to the surface of the side, facing a containing block,of the supporting block. Two movable blocks are slidably connected to the surface of the side, back to the supporting block, of the rotating block, arc-shaped clamping blocks are fixedly connected tothe surfaces of the sides, back to the rotating block, of the movable blocks, two connecting movable blocks are fixedly connected to the surfaces of the sides, facing the rotating block, of the two movable blocks correspondingly, and the ends, away from connecting rotating blocks, of two rotating rods are rotationally connected with the two connecting movable blocks correspondingly. According tothe pretreatment device used before metal pipeline welding operation, rust on the outer surface of a metal pipeline is comprehensively polished, the effect of later-period welding of the metal pipeline is improved, and meanwhile the working pressure of workers during pretreatment before metal pipeline welding is reduced.

The invention discloses an automatically controlled telescopic infusion support which comprises a telescopic rod rack and an infusion lantern ring arranged at the top of the telescopic rod rack, wherein the telescopic rod rack comprises a rod sleeve with an inner cavity; a lifting rod is arranged in the rod sleeve; a motor for controlling the lifting rod and a storage battery for supplying electric energy to the motor are arranged on the rod sleeve; a lifting switch is also arranged on the rod sleeve; a limiting switch is arranged on the lifting rod; at least three support foot stands are arranged at the bottom of the rod sleeve; and universal wheels are arranged at the bottoms of the support foot stands. In the invention, the additional lifting rod can be controlled by the motor to extend and retract up and down in the rod sleeve; then for replacing an infusion bottle, the lifting switch can be adjusted to lower the lifting rod to a certain height, and the infusion bottle can be conveniently replaced; after the replacement, the lifting rod is raised, and the infusion bottle returns to the original height; and after the lifting rod rises to a certain height, the additional limiting switch automatically stops rising, and thus the lifting rod is prevented from leaving the rod sleeve.

The invention discloses a helicopter dual transport wheel which comprises a skid rod, a wheel holder, two wheels, a mounting shaft and a hook. The wheel holder is arranged at the tail of the skid rod and capable of being adjusted forwards and backwards; the two wheels are arranged on two sides of the wheel holder rotationally; the mounting shaft is arranged on the inner side of the skid rod and perpendicular to the skid rod; the hook is arranged in the front of the skid rod. The two wheels are arranged on the two sides of the skid rod symmetrically so that stress to the dual transport wheel is symmetrical and reasonable; over torque to the transport wheel is avoided so that structural reliability is improved and service life is prolonged. Besides, the dual-wheel structure can bear higher force as compared with the single-wheel structure, and accordingly tire burst due to over stress to the single-wheel structure is avoided effectively. Compared with the single transport wheel, the dual transport wheel has the advantages that bearing capacity is doubled as increase of the wheels, the circumstance that the transport wheel is applied with over-high torque to cause stress concentration is avoided due to the reasonable design, and reliability of the integral structure is improved while service life thereof is prolonged.

The invention discloses a damping belt for intelligent sorting of coal gangue. The damping belt comprises an installation plate, a rotating shaft is rotatably connected to one side of the installationplate, a driven roller is installed on one side of the rotating shaft, a conveying roller is installed at the other end of the rotating shaft, the driven roller is in rolling connection with a driving roller through a belt body, a first driving motor is installed on the driving roller, and an adjustment mechanism is installed on the lower side of the installation plate. The adjustment mechanism comprises a control shaft, a transverse plate is fixed to the end of the control shaft, the belt body penetrates through the space between a first supporting roller and a second supporting roller, a first baffle is fixed to one side of the first supporting roller, and a second baffle is fixed to the end, away from the first baffle, of the second supporting roller. The damping belt avoids the situation that the belt body is disengaged; and besides, by arranging the first baffle and the second baffle to limit the belt body, the situation of disengagement during high-speed rotation is avoided.

The invention relates to the technical field of glue pudding dough processing, in particular to a squeezing mechanism for a glue pudding dough drying press. The squeezing mechanism comprises guide rails which are arranged in parallel. The opposite side faces of the guide rails are both provided with sliding chutes. A squeezing device is arranged on the guide rails. The squeezing device comprises a fixed plate and a sliding plate. The fixed plate is connected with one ends of the guide rails, and the sliding plate and the guide rails are in sliding connection. The sliding plate is connected with a squeezing controller through supporting rods. A stock supporting plate is further arranged between the fixed plate and the sliding plate. A plurality of pairs of protrusions are arranged on the side face of the stock supporting plate. The stock supporting plate and the guide rails are in sliding connection through the protrusions. A positioning plate and a stripping device are arranged at the ends, far away from the fixed plate, of the guide rails. A rotating device is further arranged in the middle parts of the guide rails. In addition, a machine frame is provided with an upper water sprayer located above the fixed plate and a lower water sprayer located below the positioning plate. By the adoption of the squeezing mechanism, the problems that cleaning of the stock supporting plate is troublesome and the stock supporting plate in an existing squeezing mechanism cannot be cleaned in time can be solved.

The invention relates to the technical field of fire fighting equipment, in particular to a fire fighting and fire extinguishing system. The fire fighting and fire extinguishing system comprises a storage bottle, an alarm apparatus, a baffle, a wax sealing block, a drawing rope and a reversing wheel, wherein an opening of the storage bottle faces the ground, the baffle is hinged to the storage bottle, the free end of the baffle can rotate around a hinging shaft under the effect of gravity, the wax sealing block is laid on the ground and can be molten at the predetermined temperature, one end of the drawing rope and the free end of the baffle are assembled together, the other end of the drawing rope is fixed by the wax sealing block, and the reversing wheel is used for the drawing rope to rotate around for reversing. When a fire breaks out, the temperature of the ignition point rises, the wax sealing block is molten, thus the drawing rope is loosened, at this moment, the baffle rotatesaround the hinging shaft under the effect of its own gravity, then the opening of the storage bottle is opened, and the alarm apparatus is started, so that a fire extinguishing agent in the storage bottle is released to carry out fire extinction motions, and the start of the alarm apparatus can warn the staff of the fire. Compared with smoke alarm apparatuses in the prior art, the fire fighting and fire extinguishing system controls the start of the alarm apparatus and the opening of the storage bottle through the melt of the wax sealing block, and the possibility of false alarming is lowered.

The invention relates to the technical field of bridge anti-falling beams, in particular to a bridge anti-falling beam device with a sliding damping mechanism. The device comprises a bridge pier body,a support for placing bridge decks is arranged on the bridge pier body, the ends of the two bridge decks are symmetrically placed on the support, at least two mounting grooves are symmetrically formed in the upper surface of the support along the central section, and sliding damping mechanisms, locking mechanisms and pre-limiting mechanisms are arranged in the mounting grooves. Mounting columns matched with the mounting grooves in position are arranged on the bottom face of the bridge floor, pressing bosses are arranged at the bottoms of the mounting columns, the diameter of the mounting bosses is smaller than that of the mounting grooves, the mounting bosses are located in the mounting grooves, the depth of the mounting grooves is larger than the height of the mounting columns, and the upper surfaces of the supports make close contact with the lower surface of the bridge floor. The technical scheme is used for solving the problem of beam falling damage of the bridge.

The invention discloses doorbell equipment. The doorbell equipment comprises a fixed support and a doorbell main body, wherein the fixed support is provided with a first positioning part and a first limiting part; the doorbell main body is provided with a second positioning part and a second limiting part, and the doorbell main body slides relative to the surface, provided with the first positioning part, of the fixed bracket to have a locking state and a separating state; when the doorbell main body is in a locking state, the second positioning part and the first positioning part are abuttedand positioned to limit the movement of the doorbell main body along the direction deviating from the fixed support, and the first limiting part and the second limiting part are clamped to limit the relative sliding of the doorbell main body and the fixed support. The technical scheme of the invention aims to prevent the doorbell main body from being easily separated from the fixed bracket in a locked state, and improve stability of the doorbell main body after installation.

The invention relates to the field of medical instruments, in particular to a multi-dimensional fixed heart valve prosthesis which comprises a support and a valve, the support comprises a valve sewing section and an atrium section, the valve is fixedly connected to the valve sewing section, the valve sewing section is connected with the atrium section in a matched mode, a valve leaflet clamping piece is arranged on the valve sewing section, an anti-falling anchoring mechanism is arranged on the atrium section, after the heart valve prosthesis is released, the valve leaflet clamping piece is connected with a front heart valve leaflet of a patient in a matched mode, and the anti-falling anchoring mechanism penetrates through the atrium section and is fixedly connected with the back valve tissue of the patient. The physiologico-anatomical structure of the heart is used skillful, the valve leaflet clamping piece is arranged in the front valve area, and is used for fixing the front valve; a two-way anchoring device is arranged in the back valve area, so that the back valve area of the patient is fixed; the combination of the two enables the valve prosthesis to have multi-dimensional anchoring force, and the anchoring effect of the valve prosthesis in the heart is ensured.

The invention discloses a big data server with a convenient wire arrangement structure, which comprises a server main body, a fixing groove block is fixedly connected to the middle of the wiring side of the server main body, and a plurality of first tightening pieces are fixedly connected to the side surface, far away from the server main body, of the fixing groove block; a plurality of first fixing blocks are arranged in the fixing groove block, the upper end of each first fixing block is fixedly connected with a sliding block, the upper end of each sliding block is fixedly connected with a second tightening piece, and the side face of each first fixing block is fixedly connected with a first connecting block; each first connecting block penetrates through the corresponding fixing groove block to be fixedly connected with a first rack, and the upper end of one side of each first rack is engaged with a first gear. According to the invention, by constraining a single or single bundle of wires of the server, the problems of disordered winding and great fire hazard potential safety hazard caused by too many server wires are solved, so that the server wires are arranged in order, and the convenience of the server in management and maintenance is improved.

The invention discloses a low-voltage side short-circuiting device of a power transformer. The low-voltage side short-circuiting device of the power transformer comprises a conducting wire, a connection terminal, a connection terminal slot, a first connecting line, a connector, second connecting lines and a wiring clamp assembly; the connection terminal is arranged at the left end of the conducting wire; the connection terminal slot is arranged at the right end of the conducting wire; the first connecting line is fixedly connected to the bottom of the conducting wire; the connector is fixedlyconnected to the bottom of the first connecting line; two second connecting lines are fixedly connected to the bottom of the connector; and the wiring clamp assembly is arranged below the connector. According to the low-voltage side short-circuiting device of the power transformer in the invention, due to mutual matching of the conducting wire, the connection terminal, the connection terminal slot, the first connecting line, the connector, the second connecting lines and the wiring clamp assembly, good clamping effect is realized; a condition that the wiring clamp assembly is separated from asecondary terminal in a test process can be effectively avoided; therefore, the accident occurrence probability is reduced; the security is greatly improved; and thus, the low-voltage side short-circuiting device of the power transformer is worthy of being popularized.