69results about How to "Achieve exit" patented technology

The invention relates to an automatic dispensing machine. Two groups of carrier transportation mechanisms are respectively arranged on a base plate; a calibration mechanism and a dispensing mechanism are respectively arranged on the base plate; the calibration mechanism is positioned below the dispensing mechanism; a product is arranged at the front end of a carrier; a part is arranged on the rear part of the carrier; under the action of a motor, the carrier is pushed inwards, a height difference between the mounting position of the part and the mounting position of the product is acquired in a laser manner, and the glue outlet amount is calculated; then the carrier is pulled out; a worker takes out the carrier, puts the carrier onto another carrier transportation device and inwards pushes the carrier; before dispensing, a Z-axis mechanism on the dispensing mechanism drives an R-axis mechanism to move to be in front of the calibration mechanism according to acquired data; the position of a dispensing valve is adjusted according to a requirement; after being calibrated, the dispensing valve is transported to a position required to be dispensed of the product; the CCD (charge coupled device) calibration mechanism is used for calibrating a dispensing position, so that the dispensing position is precise; then dispensing is executed; finally a UV (ultraviolet) lamp is moved to be aligned with the dispensing position so as to implement solidification. The automatic dispensing machine is used for performing dispensing and solidifying in the process of adhering small-size parts to an electronic product.

A satellite solar battery array in-orbit test circuit is used for a satellite solar battery array in-orbit IV curve test, and comprises an on-satellite electronic device, an on-satellite information processing unit and a satellite-ground communication unit. After an IV test circuit is switched on, in-orbit real-time data including voltage, current, temperature and the like of a solar battery array can be acquired through the on-satellite electronic device in real time, then is processed by the on-satellite processing unit and is downloaded by the satellite-ground communication unit. A complete solar battery array IV characteristic curve is drawn. The satellite solar battery array in-orbit test circuit overcomes the defects of an existing method that only the voltage and current of the working point of a satellite bus can be counted and the IV curve cannot be visually and comprehensively reflected, improves the accuracy and comprehensiveness of performance monitoring of the solar battery array, provides complete IV curve information for the performance evaluation of the solar battery array, improves the evaluation efficiency of the satellite life, and provides the in-orbit management of the satellite solar battery array with simpler and more visual data support.

The invention provides a remote phosphor structure applicable to LED lighting and a production method thereof. The remote phosphor structure applicable to LED lighting comprises a light-permeable support part and a phosphor layer arranged on the same. The phosphor layer at least comprises first-wavelength phosphor and second-wavelength phosphor. The first-wavelength phosphor forms a first phosphor layer. The second-wavelength phosphor forms a second phosphor layer. The first phosphor layer and the second phosphor layer are stacked on the light-permeable support part layer by layer. The production method includes producing at least two layers of phosphor different in wavelength on the light-permeable support part. By the design of the phosphor layers, multi-wavelength layering-stacked structure or multi-wavelength array structure, multispectral emergence is achieved, color rendering is improved, color temperature is lowered, and luminous efficiency of the phosphor is guaranteed.

The invention discloses a tandem type white-light organic light emitting diode. The tandem type white-light organic light emitting diode comprises an anode, a first light emitting unit, a middle electron transfer layer, a connecting layer, a middle cavity transfer layer, a second light emitting unit and a cathode which are sequentially overlapped and connected in series, wherein the first light emitting unit is used for emitting blue light; the second light emitting layer is used for emitting yellow light; or the first light emitting unit is used for emitting white light and the second light emitting layer is used for emitting white light; the middle electron transfer layer adopts Bphen doped with active metals of which the work function is lower than 3eV so as to absorb an electron transfer material of which the peak position is larger than 490nm or smaller than 440nm in the middle electron transfer layer, and thus absorption of blue light is avoided, and the blue light of the tandem type white-light organic light emitting diode is enhanced, so the aim of emitting cold white light is realized.

The invention provides a forced locking device for a secondary pressing plate and a forced locking method for the secondary pressing plate, and belongs to the field of misoperation prevention devices of power systems. The device comprises a housing, and also comprises an upper case, a lower case, a static contact clamping sleeve, a clamping sleeve internal rotating shaft, a locking sleeve dead clamping substrate left side, an internal locking tool, and an RFID code sheet. The upper case is provided with a movable contact locking sleeve, a rotating track slot protection board, an RFID code sheet installation groove, and a groove. The device can achieve the forced locking of the pressing plate, can enable the pressing plate to be completely disconnected, can effectively record the in-service and out-of-service states of the pressing plate, and can achieve installation when the secondary pressing plate is in operation.

The invention discloses a maintenance and control system between a master substation and slave stations. The maintenance and control system comprises the master substation and a plurality of sub-substations, wherein the master substation is in communication connection with the plurality of sub-substations respectively; the master substation is used for receiving information uploaded from the sub-substations, collecting and processing grid operation information, carrying out unified and coordinated control on a load and a power flow of a power grid according to a given control strategy and sending a control command to the sub-substations to finish the control function on the overall power grid; a sub-substation collection device collects currents, voltages, active powers and reactive powers of equipment in the sub-substations; and a control device is used for controlling all equipment in the sub-substations, carrying out data communication with the master substation through a communication device, transmitting operation information and fault information of the sub-substations and receiving the control command of the master substation to control the equipment in the sub-substations.

The invention belongs to the field of display and discloses a light conduction device, a backlight module and a display device. The light conduction device is matched with a panel to form the display device, and comprises a first prism layer, wherein the first prism layer is provided with multiple prism strips on the surface away from the panel, and is provided with multiple reflection slots in the surface facing the panel, multiple reflection surfaces matched with prism surfaces of the first prism strips are formed on the reflection slots, the reflection surfaces reflect received light rays to the corresponding prism surfaces, and the prism surfaces of the first prism strips are used for emitting the received light rays, reflected by the corresponding reflection surfaces, to the panel in a first direction. According to the light conduction device, by the matching of the prism strips and the reflection slots, the light rays of a light source are emitted to the panel in the single direction to form a backlight with a narrow viewing angle; even if the incident angle of the light source is bigger, normal and uniform backlight can be formed.

The invention discloses a manufacturing method of a deep ultraviolet LED chip with a vertical structure. The method is specifically characterized in that a p-GaN ohmic contact layer is processed intoa grid-shaped structure by using a laser direct writing process, and a p type low-resistance ohmic contact Ni / Al electrode with high reflectivity is used for ohmic contact with the p-GaN grid to formgood ohmic contact; a groove array and an inner reflector groove array are etched between a Ni / Al p electrode conductive layer and the n-AlGaN layer of an epitaxial layer to obtain a honeycomb structure, and the Al layer as a reflector is deposited on the side wall of the inner reflector groove to obtain a honeycomb-shaped inner reflector structure; and by replacing a p-GaN layer in a traditionaldeep ultraviolet LED with the grid-shaped transparent p-GaN layer and designing the honeycomb-shaped inner reflector structure, emission of photons transversely propagated on the LED active layer is achieved, loss of a source region in the deep ultraviolet LED chip is reduced, and the light extraction efficiency of the chip is greatly improved.

The invention discloses a short-wheelbase drilling device comprising a power device (3). The short-wheelbase drilling device is characterized in that an output shaft of the power device (3) is connected with a spindle crank (4) and penetrates a drill box (6), the other end of the drill box (6) is provided with a feed screw (7), the lower end of the spindle crank (4) is connected with a rotary disc (5), a group of drill shaft cranks (2) is arranged on the rotary disc (5), and the lower ends of the drill shaft cranks (2) are provided with drill bits (9) arranged on the drill box (6). By the aid of rotation of the cranks, the spindle crank transmits power onto the rotary disc, the rotary disc continuously rotates around the spindle crank and further drives the drill shaft cranks below to rotate, and the drill bits are mounted at the lower ends of the drill shaft cranks, so that multiple holes can be drilled in workpieces at one time.

The invention relates to a threaded through hole detection device, and belongs to the technical field of threaded hole detection equipment. The threaded through hole detection device is characterizedby comprising a lifting mechanism, a plurality of mounting frames (8) arranged around the lifting mechanism and clamps (3) arranged on the lower sides of the mounting frames (8), a plurality of translation mechanisms are arranged on each mounting frame (8), each translation mechanism is connected with a drill rod in a sliding manner, and the lower end of each drill rod is connected with a screw tap through a power device; a rotary disc (33) is rotationally arranged on a rotary mechanism, the rotary disc (33) is connected with a clamp motor for driving the rotary disc (33) to rotate, two swingarms are symmetrically arranged on the two sides of the rotary disc (33), a jaw vice (37) is arranged between the two swing arms, a first swing arm motor is further arranged on the rotary disc (33), and an output shaft of the first swing arm motor is connected with the two swing arms at the same time. According to the threaded through hole detection device, the relative positions of threaded through holes can be detected, threads of the threaded through holes can also be detected, so that the detection of the threaded holes in multiple surfaces can be completed through one-time clamping.

The invention discloses an optical phased array chip transmitter based on metal slit waveguides. The transmitter is formed by a medium optical waveguide array and a metal plasma slit waveguide array.The interval of the medium optical waveguides is gradually reduced from the left to the right, and the whole medium optical waveguide is of a fan-shaped structure. The interval of the metal plasma slit waveguide array is firstly reduced and then unchanged, and the whole metal plasma slit waveguide array likes a transversely arranged hopper. The right end of the medium optical waveguide array and the left end of the metal plasma slit waveguide array form a whole body structure in a penetrating way, so it is ensured that optical energy is transited to the metal plasma waveguide from the medium waveguide in a low loss manner. According to the invention, by use of the characteristics of weak penetrating ability of light in metal and strong light wave model field constraints, intervals of the plasma waveguides are reduced, the range of output diffraction angle is increased, and the laser scanning angle covering range is increased. The emission end is simple in structure, small in crosstalkbetween waveguides, and big output wave beam deflection angle and has profound application prospects in laser radar field.

The embodiment of the invention relates to the field of social circle building, and provides a mobile short social circle building method based on position services. The method is used for a mobile terminal, and comprises the steps: obtaining the geographical position information of the mobile terminal; obtaining the application scene information of the surroundings of the mobile terminal; automatically building a social circle when the position information and the application scene information meet a certain threshold condition; and automatically breaking away from the social circle when the position information and the application scene information exceed the threshold value. According to the invention, the method can achieve the automatic construction of the social circle in a certain range, achieves the automatic separation from the social circle when the certain condition is not met, and avoids the residual of a useless circle.

The invention discloses a micro-electro-mechanical system (MEMS)-based multi-channel tunable fiber laser and a control method for the same. The awkward scheme that a plurality of independent lasers are simply combined in a common multi-channel fiber laser structure is abandoned, and an integrated optical module is ingeniously shared by a plurality of fiber optical modules, so that the aim of simultaneously and independently tuning a plurality of paths of laser output by utilizing an MEMS processor is fulfilled, and the development of the multi-channel tunable fiber laser towards integration, miniaturization, high accuracy and multifunction are facilitated. A plurality of wavelength channels of laser can be simultaneously output, and the wavelength of the laser in each channel is continuously tunable within the waveband of an optical fiber amplifier, and the connection and disconnection of each channel are independently controlled; and the output wavelength and output power of each channel can be simultaneously and independently tuned locally or remotely through software. The whole experiment has low requirements on the environment, and is easy to operate and productize.

The invention provides protective clothing used in an epidemic situation and a breaking and detaching device thereof, belonging to the technical field of protective clothing. The protective clothing of the invention solves the problems of inconvenience in detaching, unfit size, poor comfort and the like in the prior art. The protective clothing used in the epidemic situation in the invention comprises a hood, an upper garment and trousers, wherein the above three parts are connected into a whole to form conjoined clothes; a strip-shaped opening is formed in the upper garment; and an outer sealing structure is arranged at the opening and can close the opening. The protective clothing is characterized in that the conjoined clothes comprise a conventional part and a protruding part; the detaching opening is formed in the conjoined clothes; the inner edge of the detaching opening extends outwards and is folded and closed to form the protruding part, and the protruding part can be folded; and when the protruding part bulges, the maximum internal space of the protruding part is 0.2-3 times the internal space of the conventional part of the conjoined clothes. The protective clothing has the advantages that the protective clothing is taken off through the breaking and detaching device, so pollution is avoided; and a medical worker has a large space to have a rest in the protective clothing through the protruding part, so working efficiency is greatly improved.

The invention discloses an early-warning and control system between a main substation and a slave station. The early-warning and control system comprises a main substation and multiple satellite substations; the main substation is in communication connection with the satellite substations, the main substation is used for receiving information uploaded by all the satellite substations, collecting and processing power grid operation information, conducting unified coordination control on a load and load flow of a power grid according to an established control strategy and issuing control commands to the satellite substations to complete a control function of the whole power grid; a satellite substation collecting device collects the magnitude of current, the voltage, the amount of active power and the amount of reactive power of equipment in the satellite substations. The control system is used for controlling all equipment within the range of the satellite substations, being in data communication with the main substation through a communication device, sending operation information and fault information of the satellite substations, receiving the control commands of the main substation and controlling the equipment in the satellite substations.

The invention discloses a long-pole telescopic screw fastening device for an orthopedic interventional operation. The long-pole telescopic screw fastening device comprises a handle, wherein the handleis of a hollow structure; a rechargeable battery is arranged inside the handle; a first button and a second button are arranged on the sides of the handle; a sleeve is arranged at one end of the handle; a first protective shell is arranged on the side of the sleeve; a first motor is arranged inside the first protective shell; a gear is arranged on the output shaft of the first motor; a second protective shell is arranged at one end of the sleeve; a second motor is arranged inside the second protective shell; the output shaft of the second motor is inserted into the sleeve and connected with alead screw; a thread bushing is connected to the lead screw in a sleeving manner by virtue of a thread; a slide bar is fixed on the side of the thread bushing; a chute is formed in the inner wall ofthe sleeve; one end, which is far away from the thread bushing, of the slide bar is arranged in the chute in a sliding manner. The long-pole telescopic screw fastening device disclosed by the invention is capable of realizing intelligent operations, simple in operation and very high in efficiency.

The invention discloses a power grid direct-current flexible loop closing control device and a control method thereof. The device is a series-parallel connection device and comprises a series connection coupling unit, a parallel connection coupling unit, other bypass switch circuits and a loop closing main controller, wherein each group of series-parallel connection device is connected in series between each section of power distribution line and load, after a loop closing instruction is received, a loop closing control device is set to work in a voltage control mode, when the direct-current bus voltages of the two groups of loop closing devices are consistent, the system enters a loop closing state, and before loop closing is quitted, the device is set to be in a PQ control mode, access switches are sequentially disconnected after P and Q are gradually reduced to zero, and the loop closing process is ended. According to the invention, the device has the advantages of being simple in structure, low in cost, less in loop closing monitoring amount compared with alternating current loop closing, and high in efficiency; and flexible power mutual aid and fault rapid exit can be realized, the power factor of the closed loop zone area is adjusted to be optimal, the power supply mode of the distribution network can be flexibly changed, and the new energy consumption level and the direct current load accepting capability are improved.

The invention discloses a cutting device special for petroleum pipelines. The cutting device comprises a cutting device body and a transmission unit. The transmission unit comprises a base, supports,a first electromotor, a reduction gearbox, a transmission belt, a first transmission belt wheel, a second transmission belt wheel and transmission rollers. The two supports are fixedly mounted at theleft end and the right end of the base correspondingly. The two transmission rollers are mounted at the two ends of the tops of the supports correspondingly. The second transmission belt wheel is fixedly mounted on a shaft rod of one transmission roller. The first electromotor is connected with the reduction gearbox through a coupling. An output shaft of the reduction gearbox is fixedly connectedwith the first transmission belt wheel. The first transmission belt wheel and the second transmission belt wheel are connected through a transmission belt. The first electromotor and the reduction gearbox are fixedly mounted on the base. A triangular frame is mounted on each support. An operation plate is mounted on the triangular frames. The cutting device body is fixedly mounted on the operationplate. According to the device, the petroleum pipelines of different pipe diameters can be cut, cutting is uniform, adopted manpower is reduced, the cutting quality is guaranteed, and the cutting efficiency is improved.

The invention discloses a gallium nitride nano superstructure, a preparation method thereof and a gallium nitride-based laser with the gallium nitride nano superstructure. The gallium nitride nano superstructure is used for realizing circular polarization light emission of the gallium nitride-based laser. The gallium nitride nano superstructure sequentially comprises a substrate, a dielectric film layer and a nano grating structure layer from bottom to top, a grating material of the nano grating structure layer comprises one of gallium nitride, n-type gallium nitride and p-type gallium nitride, the grating period range is 100 nm to 280 nm, the grating height range is 100 nm to 300 nm, and the grating line width is 50 nm to 200 nm. The gallium nitride nano superstructure can realize an efficient circular polarization light emitting function, and circular polarization light emitting of a gallium nitride-based laser can be realized when the gallium nitride nano superstructure is applied to the gallium nitride-based laser.

The invention provides a multi-system unified authentication method, a system and a computer storage medium. The method comprises the steps of acquiring operation information of a user by an authentication center; displaying a plurality of subsystems of the user for access by the user according to the operation information; when the user accesses one of the subsystems, the authentication center judging whether the session information of the user and the sub-system exists or not; and determining whether the user successfully accesses the subsystem or not according to whether the conversation information exists or not. According to the method, the system and the computer storage medium, unified login and exit of all the systems can be realized. Repeated operation of a user is reduced, and user experience is improved.

The invention discloses a puncturing device used for shoes provided with locators. The puncturing device comprises a bottom plate, wherein a shoe tree and a support plate are fixed on the bottom plate, a top plate is inserted on the support plate, a plurality of locating holes are formed in the top plate, a locating rod is inserted in one of the locating holes, the upper end, penetrating through the support plate, of the locating rod is provided with a baffle plate, a pressure spring sleeves the locating rod, two ends of the pressure spring push against the baffle plate and a butting plate, alifting rod is inserted on the top plate, a clamping rod is fixed at the lower end of the lifting rod, a rack is formed at the upper end of the lifting rod, an arc-shaped tooth ring is meshed on the rack, and the tooth ring is formed at the upper end of a rotation rod; and a support base is formed on the bottom plate, a puncturing bolt is screwed to the support base, the front end of the puncturing bolt is fixed on a puncturing apparatus, a through groove is formed in the bottom of the puncturing apparatus, a material ejecting rod is inserted in the through groove, the upper end of the material ejecting rod is positioned in the puncturing apparatus and faces cutting teeth, and the lower end of the material ejecting rod is formed on the bottom plate. The puncturing device is high in safetyand convenient to operate, and can automatically discharge waste materials.

The invention discloses a hole punching mechanism for installing a positioning device in a shoe. The mechanism comprises a bottom plate, a shoe last is fixed to the front of the bottom plate, a supporting rod is inserted in the bottom plate, the supporting rod is fixed to the bottom of the supporting plate, an adjusting rack which meshes with a gear is shaped at the upper end of the supporting rod, the gear is fixedly sleeved with a rotary shaft, supporting lugs are shaped on the two sides of the upper end of the supporting plate, a top plate is hinged to the supporting lugs, a lifting rod isinserted into the side of the top plate, a clamping rod is fixed to the lower end of the lifting rod, a rack is shaped at the upper end of the lifting rod, a tooth ring meshes with the rack, and the tooth ring is shaped at the upper end of the rotary rod; a supporting seat is shaped at the rear end of the bottom plate, a longitudinal hole punching bolt is screwed to the upper end of the supportingseat, the front end of the hole punching bolt penetrates through the supporting seat to be fixed on the hole punching device, cutting teeth which are arranged circularly are shaped at the front end of the hole punching device, a through groove is formed in the bottom of the hole punching device, an L-shaped jacking rod is inserted in the through groove, and the upper end of the jacking rod is located in the hole punching device. The device has the advantages of high safety performance and convenient operation, and wastes can be automatically discharged.

The invention provides a material conveying mechanism. The material conveying mechanism comprises a first goods shelf, a second goods shelf, a conveying component and pallets. The first goods shelf and the second goods shelf are arranged in a spaced mode and are each defined by at least three vertically-arranged limiting columns, and an up-down moving channel of the pallets is arranged. First limiting pieces are arranged at the bottom of the first goods shelf. Second limiting pieces are arranged at the bottom of the second goods shelf. The conveying component is arranged at the bottoms of the first goods shelf and the second goods shelf. The pallets are taken out from the first goods shelf through the conveying component and conveyed into the second goods shelf through the conveying component. According to the material conveying mechanism provided by the invention, the conveying mode is stable, vibration is avoided, noise is low, even zero noise can be achieved, and enough materials can be conveyed at a time.

The invention discloses a power energy router interface plug-and-play realization method, which relates to the field of use of power energy routers and aims at ensuring reliable connection and stableenergy exchange of a power device and reducing the impacts of hard connection of the power device on an energy router system. The power device is connected to a 360V DC bus through a power converter,and a signal coupler is connected across two ends of the power converter; the information of the power device is collected, and a load characteristic library of the power device is established; and the currently connected power device type is identified and the current operation state information of the power device is acquired; a power device model is extracted from the load characteristic library, whether the power device is in a fault state is judged, and the operation state information of the power device at the next moment is predicted; in a non fault state, the power converter port parameters are adjusted to enable the power converter and the connected power device to realize no-error connection; and in a fault state, teh power converter is controlled to stop energy transmission.

The invention discloses an automatic screw-up device for a double-end stud. The automatic screw-up device comprises a guide rail mounted on a bracket, wherein the piston rod of a primary linear air cylinder is fixedly connected with a lower fixed plate; a secondary linear air cylinder is mounted on an upper fixed plate; a retraction air cylinder is fixedly arranged on the lower fixed plate; the piston rod of the secondary linear air cylinder is connected with the piston rod of the retraction air cylinder through a connecting rod; a screw-up shaft is mounted on the upper fixed plate, and extends out of the upper fixed plate; the screw-up shaft is connected with a clutch; the clutch is connected with a screw-up head, and the screw-up head extends into a bolt feeding nozzle; the bolt feeding nozzle is fixed with the lower fixed plate; a bolt inlet is formed in the upper portion of the bolt feeding nozzle; a bolt blocking nozzle is mounted on the lower portion of the bolt feeding nozzle; a bolt blocking nozzle air cylinder is fixed with the end surface of the bolt feeding nozzle; the piston rod of the bolt blocking nozzle air cylinder is connected with a connecting plate; one end of a screw-up spring is fixed with the upper fixed plate, and the other end of the screw-up spring is fixed with a buckle; and the buckle is buckled on the screw-up shaft. The automatic screw-up device disclosed by the invention is used for a sleeve automatic assembly production line, and is used for automatically mounting and screwing up the double-ended stud into a threaded hole of a workpiece, so that automatic mounting and screw-up work of standard parts in an automatic assembly process is effectively solved.

The invention discloses a self-rotating anti-loose connection structure which comprises a body, a self-rotating nut and a connection joint which are matched with one another, wherein a water inlet cavity is arranged on the body; the connection joint is arranged in the water inlet cavity and is sealed and fixed; the self-rotating nut is arranged on the outer edge of the connection joint in a sleeving manner and is fixed by fixing pieces; a step surface for hanging the self-rotating nut is arranged on the connection joint; a fastener connected with a clamping position on the body in a matching manner is arranged on the connection joint; the fastener or a clamping ring or an insertion pin on the connection joint is connected with the body, and sealing is realized by a sealing gasket on the connection joint; two edges of the joint are limited, so that the connection joint cannot rotate and withdraw, and the position is fixed; the step at the tail end of the connection joint hangs the self-rotating nut; therefore, a connection structure for the self-rotating nut is realized; the two fixing pieces on the self-rotating nut are correspondingly locked to press against the connection joint and threads to be connected after being subjected to self-rotating connection, so that the connection position of the self-rotating threads is fixed, without derotation, withdrawing and exposure.

The invention discloses a hard rock film coating dill bit. The hard rock film coating dill bit comprises two bit tools and a drill bit body, the bit tools are symmetrically arranged on the drill bit body, and the bit tools are wear-resisting reinforced bit tools. Body protecting alloys distributed peripherally are located at the positions, located at the lower ends of the bit tools, of the drill bit body, water through holes are formed in the drill bit body, drill bit retreating blades are symmetrically arranged at the positions, located at the lower ends of the bit tools, of the drill bit body, and the drill bit retreating blades are installed on the drill bit body through rotating shafts. Connecting rods which are movably installed are arranged on the drill bit body, the connecting rodsare of a round structure and water through holes are arranged in the center positions of the connecting rods, a fixing block used for preventing the mutual rotation of the connecting rods and the drill bit body is arranged at the upper ends of the connecting rods, the fixed block can move up and down along a sliding groove formed in the drill bit body, and a spring is arranged between the lower end of the fixing block and the drill bit body. The hard rock film coating dill bit can realize the rapid drilling of a mine, and at the same time, during drill bit retreating, the drill bit can be retreated quickly through the drill bit retreating blades to prevent the drill bit from sticking when the drill bit is retreated.

The invention discloses a power grid alternating current flexible loop closing device and a control method thereof. The device is a series-parallel connection device and comprises a series connection coupling unit, a parallel connection coupling unit, other bypass switch circuits and a loop closing main controller. After a loop closing instruction is received, the loop closing control device is set to work in a voltage control mode, and when the amplitude and the phase of the output voltage of the device side coincide with the other section, the system enters a loop closing state. And after entering a loop closing state, the device works in a PQ control mode. Before loop closing is quitted, P and Q of the device are gradually reduced to zero, then the access switches are sequentially disconnected, and the loop closing process is finished. The device has the advantages that the device is simple in structure, low in cost and high in efficiency, the voltage amplitude and phase of a loop closing point can be adjusted online, active and reactive power flow between loop closing areas can be adjusted online in a bidirectional mode, and the power factor of the loop closing areas is kept at the optimal value. Flexible power supply transfer between the distribution networks and rapid exit during a fault can be realized, and the load rate and the load balance of a distribution network power supply area are improved.

The invention discloses a screwing type hard pressing plate for a transformer substation which comprises a fixing bottom plate, wherein fixing pipes are arranged on the two sides of the fixing bottom plate. oppositely arranged conductive core columns respectively connected with the corresponding fixing pipes; positioning pieces oppositely arranged, wherein the outer sides of the corresponding conductive core columns are sleeved with the positioning pieces respectively; a rotating part one end of which is rotationally connected with the fixed bottom plate, and the other end of which is in a free state; a Z-shaped connecting piece connected with the rotating part, wherein limiting clamping grooves are formed in the two ends of the Z-shaped connecting piece respectively, and the limiting clamping grooves are used for being clamped with conductive core columns; a pressing piece connected with the rotating part. When the rotating part rotates, the rotating part drives the two ends of the Z-shaped connecting piece to make contact with the corresponding conductive core columns respectively, and the rotating part further drives the pressing piece to drive the positioning pieces to fix the two ends of the Z-shaped connecting piece to the corresponding conductive core columns respectively. According to the invention, the input and withdrawal difficulty of the hard pressing plate is greatly reduced, the hard pressing plate is convenient to use by a worker, and the stability of the hard pressing plate during use is ensured.

The invention discloses a node withdrawing device for a vertical traction rod. The device comprises a bottom plate, a supporting assembly arranged at the upper end of the bottom plate and a withdrawing assembly arranged on the supporting assembly, the withdrawing assembly comprises a longitudinal withdrawing unit for withdrawing a rubber node in the longitudinal connecting end of the vertical traction rod and a transverse withdrawing unit for withdrawing a rubber node in the transverse connecting end; and the vertical traction rod is arranged on the supporting assembly. The rubber nodes at the two ends of the vertical traction rod are withdrawn through the longitudinal withdrawing unit and the transverse withdrawing unit respectively, and the technical problems that when a person holds a withdrawing tool to conduct rubber node withdrawing operation, the working efficiency is low, and an inner hole of a rod body is prone to being damaged can be solved.