50results about How to "Achieve excision" patented technology

The invention relates to a breaker of a direct current system, in particular to a semi-controlled active injection current high voltage direct current breaker and a realization method thereof. The breaker comprises a high speed switch-thyristor module branch, as well as a lightning arrester branch and a bridge circuit which are connected in parallel with the branch, wherein a capacitor-reactor series branch and a resistor-thyristor series branch are connected in parallel and then connected with middle points of two bridge arms of the bridge circuit; and the two ends of a capacitor are connected in parallel with a charging loop. The breaker is based on a direct current breaking principle by the traditional active injection current manner; semi-controlled power electronic devices are added; a high speed mechanical switch is adopted; the advantage of low loss during normal breakover is kept; and bidirectional current can be broken quickly without an arc. The breaker is simple in circuit topological structure, simple and convenient to control, mature in technology, easy to realize, great in current breaking capability, high in withstand voltage level and strong in expansion capability, and the cost is lowered greatly since the number of the adopted power electronic devices is small.

The invention relates to an automatic seedling feeding device for a direct inserting type culture pot seedling grafting machine. The invention aims to provide a device capable of automatically and effectively cutting hole seedling growing points and realizing the full automatic seedling feeding for the direct inserting grafting machine. The device is also characterized by accurate positioning, correct cutting position and convenient operation. The invention adopts a technical proposal that a tray automatic seedling feeding device comprises an installation plate, a tray transporting unit, a hole seedling transporting unit, a hole seedling treatment unit and a control unit. In the tray transporting unit, a first step motor drives a conveyer belt to move. In the hole seedling transporting unit, a second step motor drives a first guide rod cylinder through a straight line driving mechanism; a first gas claw group and a second gas claw group are arranged on the first guide rod cylinder; and the two gas claw groups respectively have a pair of seedling gripping paws and a pair of stem cutting blades. A second mounting rack and a second connecting plate are arranged in the hole seedling treatment unit; a third gas claw group and a second guide rod cylinder are arranged on the second connecting plate; and the third gas claw group and the second guide rod cylinder respectively have a pair of positioning paws and a pair of blades.

The invention provides a fluorescence contrast agent. The fluorescence contrast agent comprises gold nanoclusters, antibodies of tumor specificity markers and coomassie brilliant blue, wherein the gold nanoclusters and the antibodies of the tumor specificity markers are connected in a click-chemistry mode; and the coomassie brilliant blue is combined with the gold nanoclusters connected with the antibodies of the tumor specificity markers. The fluorescence contrast agent provided by the invention has the characteristic of naked-eye visualization. In addition, the invention also provides a preparation method of the fluorescence contrast agent; and the method is simple in step and is suitable for industrial production.

The invention provides a small current grounding fault processing method with a line selection device and a protection recloser cooperated and belongs to the field of power system relay protection. The method is characterized by including the following steps that a, fault lines are judged; b, a tripping instruction is sent in a delayed mode; c, whether faults exist or not is judged, the step d is executed if the faults exist, and the step f is executed if the faults disappear; d-e, the fault lines are reclosed; f, whether the faults reappear or not is judged, the step g is executed if the faults do not reappear, and the step h is executed if the faults reappear; g, the fault lines are restored to normal power supply; h, the tripping instruction and a recloser locking instruction are sent. By means of the small current grounding fault processing method with the line selection device and the protection recloser cooperated, fault lines which are wrongly judged and can be self-cured through tripping arc blowout are subjected to power supply again after being tripped and the fault lines with faults incapable of disappearing by themselves are isolated through the line selection device, so that power supply reliability is greatly improved.

The invention discloses a control device for cutting a failure single section of a fixed multi-locomotive and a control method of the control device, which belong to the field of locomotive failure isolation control. The control device for cutting the failure single section of the fixed multi-locomotive is characterized in that a single section cut control switch 586 QS is arranged on a driver's desk of each section of the multi-locomotive; the single section cut control switch 586 QS of each section of the multi-locomotive is provided with the following three gears: a present section cut gear, a normal gear and an other section cut gear; a driver assigned re-connection signal is sent to a driver by a series of operations of the single section cut control switches 586 QS, a logic control unit (LCU), a pre-output logic unit I558 and a microcomputer cabinet or an electronic cabinet; and the multi-locomotive receives the signal and then cuts off a controlled section, resulting in normal brake. The control device and the control method can solve the problem of half-way stop or locomotive damage caused when a failure is not handled in time, and guarantee the transportation.

The present invention discloses a method for prevention of generation of power oscillation in a process of a main stop valve full-stroke test of a steam-turbine generation steam turbine. On the basisof the prior art, a determination module a and an alarm device are added to achieve removal of a power control loop, effectively prevent a unit from generating power fluctuation and power oscillationad emit an acousto-optic alarm after a steam turbine set is large in load deviation; a load deviation function is added to achieve that a high-pressure control valve can be switched on and off at variable speeds and reduce a small steam turbine load fluctuation amplitude; and a determination module b and a valve location manual input module are added to achieve a unit valve location maintenance function and a manual input valve location value function and effectively prevent the unit to generate power fluctuation and power oscillation. The method for prevention of generation of power oscillation in a main stop valve full-stroke test of a steam turbine provides a great guarantee for normal and smooth performing of the main stop valve full-stroke test of the steam turbine, and effectively reduces operators' burden.

The invention discloses a PET (positron emission computed tomography)-fluorescence dual-mode intraoperative navigation imaging system and an imaging method implemented by the same. The imaging method includes forming three-dimensional surface contour images of imaging samples by the aid of a spatial registration device; acquiring three-dimensional PET images of internal structures of the imaging samples by the aid of a PET imaging device; carrying out image registration and fusion on the three-dimensional surface contour images and the three-dimensional PET images to obtain three-dimensional fused images of imaging targets; acquiring two-dimensional fluorescence images of the imaging samples in real time by the aid of a fluorescence imaging device; projecting the three-dimensional fused images towards the two-dimensional fluorescence images along the normal axis of an imaging surface of the fluorescence imaging device and displaying depth information of the imaging targets on the two-dimensional fluorescence images. The three-dimensional fused images of the imaging targets comprise surface contours and internal structures. The PET-fluorescence dual-mode intraoperative navigation imaging system and the imaging method have the advantages that the PET-fluorescence dual-mode intraoperative navigation imaging system and the imaging method can be applied to tumor operation, the three-dimensional PET images and the two-dimensional fluorescence images are fused in computers, two imaging modes are complementary to each other, accordingly, tumor at optional depths can be accurately positioned, accurate tumor location information can be provided for patients, and tumor R0-resection can be implemented.

The invention relates to a square cutting, edge cutting and polishing all-in-one machine, and belongs to the technical field of crystalline silicon machining equipment. The all-in-one machine comprises a base, wherein a sliding rail is arranged on the base, a feeding workbench mechanism, a centering mechanism, a squaring mechanism, a scrap edge falling mechanism and at least two polishing mechanisms are sequentially arranged on the sliding rail along the conveying direction of crystalline silicon, the feeding workbench mechanism is used for bearing the crystalline silicon and driving the crystalline silicon to move along the sliding rail, cutting lines bypass a squaring net of the squaring mechanism and form parallel lines, the scrap edge falling mechanism is used for sucking scrap edges generated under the cutting of the squaring mechanism, and the at least two polishing mechanisms are symmetrically arranged along the sliding rail. According to the all-in-one machine, the squaring mechanism and the polishing mechanism are integrated into one, and the crystal silicon can directly enter the slicing process after being machined at one time; the squaring mechanism adopts a form of two-wire squaring, so that cutting the crystal silicon into square bars and removing edges and corners are realized, the grinding allowance of the grinding procedure is reduced, and the rough grinding procedure is omitted; and a crystal bar is subjected to edge and corner machining immediately following one-time polishing after cut into the square bars, so that the grinding efficiency is remarkably improved.

The invention discloses a plastic bottle airbag cutting device and method. Cylindrical airbags can be cut. The plastic bottle airbag cutting device comprises an inner guide groove disc, an outer guidegroove disc and an circular arc cutter, wherein the inner guide groove disc is circular and can rotate around the center of a circle; the outer guide groove disc is arranged on one side of an inner guide groove; notches matched with the shapes of the airbags are formed in the outer periphery and the arc surface of the inner guide groove disc; the circular arc cutter is arranged below the inner guide groove disc and faces the outer guide groove disc; the airbags of a plastic bottle is clamped between the inner guide groove disc and the arc surface; and the plastic bottle rotates around the circular arc cutter under the drive of the rotation of the inner guide groove disc to realize separation of the airbags and a bottle body. The plastic bottle airbag cutting method comprises the steps that A, the plastic bottle is conveyed to a plastic bottle airbag cutting device through a guide mechanism; B, the airbags on the plastic bottle are in contact with and matched with the notches of the inner guide groove disc and the outer guide groove disc; and C, under the driving of the rotation of the inner guide groove disc, the plastic bottle rotates around the fixed circular arc cutter, and after cutting is completed, the airbags are separated from the plastic bottle. The plastic bottle airbag cutting device and method have high universality and can ensure the cutting effect of the airbags.

The invention discloses a spinning ball removing device. The spinning ball removing device comprises a walking support; a driving grip is fixedly connected to the middle of the back face of the walking support; a contact ball removing mechanism is rotationally connected to the position, close to the front face, of the inner side of the walking support; a cleaning sweeping wheel is fixedly connected to the position, located above the back face of the contact ball removing mechanism, of the inner side of the walking support; and scraping grooves are evenly formed in the surface of the outer portion of the cleaning sweeping wheel. The invention relates to the technical field of spinning. According to the spinning ball removing device, the separation of spinning threads with fuzz balls is achieved, excessive dragging of the spinning threads with the fuzz balls is reduced, and the phenomenon of thread separation of spinning cloth is avoided.

The invention provides a surgical instrument and an operation method thereof. The surgical instrument may comprise a power output device, a driving shaft, a transmission shaft, a scalpel head, an adsorption device and a feedback device, wherein the driving shaft is connected with the powder output device; one end of the transmission shaft is connected with one end of the scalpel head, and the other end of the transmission shaft is connected with the adsorption device; the transmission shaft and the scalpel head are both of tubular structures; the feedback device is arranged on the scalpel head and connected with the power output device. According to the scheme, the power output device outputs power for a gear corresponding to operation and maintenance information, the scalpel head rotates and reciprocates, and therefore excision of abnormal tissue under a blade can be realized; due to the fact that the rotating speed and reciprocating speed of the scalpel head are relevant to the power of the power output device, the scalpel head can enter the abnormal tissue to completely cut off the abnormal tissue while rotating and reciprocating rapidly.

The invention relates to an assembling clamp for scissors legs. The assembling clamp for scissors legs comprises a first clamp for clamping an internal part injection molded part and a second clamp for clamping an outer frame injection molded part. The first clamp comprises a first clamp plate and a first fixed clamp group. The first fixed clamp group is connected to the front surface of the firstclamp plate, and the first fixed clamp group is used for clamping internal part stub bars of the internal part injection molded part; a plurality of convex limiting columns and inward concave first limiting grooves are formed in the front surface of the first clamp plate, the limiting columns are embedded into round holes of the scissors leg internal part, and the first limiting grooves are usedfor accommodating the internal part stub bars of the internal part injection molded part; the second clamp comprises a second clamp plate, a second clamp bottom plate and a second fixed clamp group, the second fixed clamp group is connected to the front surface of the second clamp plate, and the second fixed clamp group is used for clamping outer frame stub bars of the outer frame injection moldedpart; and the second clamp plate is connected to the second clamp bottom plate, inward concave second limiting grooves are formed in the front surface of the second clamp plate, and the second limiting grooves are used for accommodating the outer frame stub bars of the outer frame injection molded part.

A rotary cutting device comprises a machine table, a transferring mechanism, a cutting mechanism and a control mechanism, the transferring mechanism is arranged on the machine table and used for moving a product to be cut to a cutting station, the cutting mechanism is connected with the transferring mechanism and used for cutting the product to be cut, and the control mechanism is arranged on the machine table and used for controlling the transferring mechanism to move the product to be cut to the cutting station. The rotary cutting device is arranged on the base and electrically connected with the transferring mechanism and the cutting mechanism so as to control the transferring mechanism and the cutting mechanism to move and complete cutting, the rotary cutting device is simple in structure, stub bars of cup-shaped products can be cut off, an operator can operate the rotary cutting device conveniently, and efficiency is improved.

The invention relates to the field of EVA blister plates, in particular to a detection and auxiliary packaging device for the EVA blister plates, and aims to solve the technical problem about how to provide the detection and auxiliary packaging device for the EVA blister plates. According to the technical implementation scheme, the detection and auxiliary packaging device for the EVA blister plates comprises an auxiliary stacking and packaging system, a quality detection system, an edge cutting system and the like; and the quality detection system is connected with the edge cutting system. According to the detection and auxiliary packaging device, auxiliary design is carried out for the production process of EVA, and a conventional method of directly carrying out blister molding and then packaging and loading products is skipped out; the EVA blister plates are detected before the application process, and unqualified products are screened out; the risk that loaded objects are damaged due to the fact that the performance of the blister plates do not reach the standard is reduced; the packaging mode that the blister plates are packaged through just simple and manual stacking and redundant rim charges of the blister plates are not cut off is changed; the EVA blister plates can be detected and then packaged in an auxiliary manner.

Disclosed is a vein valve resection instrument. The vein valve resection instrument comprises a blood vessel supporting tube, a resection structure and a butt-joint structure; a blood vessel supporting structure is arranged at the initial end of a blood vessel; the front end of the resection structure is a first globe-roof-shaped structure, the rear end of the resection structure comprises a globe-roof-shaped recess, and the tail end of the globe-roof-shaped recess forms a circular cutter; the front end of the butt-joint structure comprises a first globe-roof-shaped protruding structure matched with the globe-roof-shaped recess; the rear end of the butt-joint structure is provided with a second globe-roof-shaped protruding structure for ensuring smooth withdrawal; in addition, a setting channel of a traction guide wire is arranged between the resection structure and the butt-joint structure in the longitudinal direction; the setting channel of the resection structure and the traction guide wire are bonded together, and the traction guide wire does not penetrate out of the setting channel in the resection structure; the traction guide wire passes through the setting channel of the butt-joint structure; the butt-joint structure performs relative sliding motion on the traction guide wire; and a front push tube which pushes the butt-joint structure to move along the traction guide wire and is arranged on the outer side of the traction guide wire is additionally arranged. The vein valve resection instrument can effectively resect and bring out the valve, and is reasonable in structure and easy to use.

The invention discloses a weeding device suitable for peripheries of roots of trees with different diameters. The weeding device comprises at least two groups of weeding devices, rotary telescopic devices and a rotating mechanism. The rotating mechanism is fixedly mounted on one group of weeding devices, and every two groups of weeding devices are movably connected through the rotary telescopic device; and when the weeding device works, the weeding device weeds around trees through the rotating mechanism, when the weeding device encounters the trees with different diameters, the radius of the whole device is changed through rotation and stretching of the rotary telescopic devices, and therefore the peripheries of the roots of the trees with different diameters are weeded. A weeding cutter assembly below the weeding device can adjust the angle of a blade, so that the weeding efficiency is higher, the service life of the blade is prolonged, and the problem that an existing weeding machine cannot adapt to different diameters of trees when weeding around the trees is solved.

The invention discloses a shipborne underwater aquatic plant cutting and collecting unmanned aerial vehicle which comprises a machine shell, a cutting power cavity is formed in the machine shell, twofixing plates are fixedly connected to the left end face and the right end face of the cutting power cavity, a cutting cavity is formed in each fixing plate, an induction block is fixedly connected tothe right end face of the fixing plate on the right side, an induction cavity is formed in each induction block, a moving mechanism capable of driving the machine shell to move is arranged in the machine shell, a fixing block capable of being fixed to the bottom of a ship is arranged on the upper side of the machine shell, a collecting cavity is formed in the fixing block, a water absorbing cavity is formed in the lower end wall of the collecting cavity, a cutting blade is arranged on the lower side of the fixing plate and can cut aquatic plants, a suction plate is arranged on the lower sideof the fixing plate, a suction disc is arranged in the suction plate, and the suction disc can suck away cut aquatic plants and water together.