92results about How to "Winding is simple" patented technology

The invention discloses an automatic winding machine of a motor iron core, which comprises a machine frame and a guide roller. The automatic winding machine of the motor iron core is characterized by also comprising a base, a workbench, a winding device and a driving device, wherein the workbench is rotationally connected with the base; a plurality of clamps which are used for clamping in-line or block type iron cores are arranged at the two opposite ends of the workbench; the winding device draws an enameled wire led out by the guide roller and the enameled wire is wound on the in-line or block type iron cores; and the driving device is arranged on the winding device and can perform three-dimensional movement relative to the base so as to control the winding trace of the winding device. Compared with the prior art, the automatic winding machine of the motor iron core adopts the multistage rotary workbench, saves time for mounting workpieces and improves the winding efficiency; and the driving device and the winding device of the automatic winding machine form a three-dimensional movement mechanism to flexibly adjust the coordinates of the thread end of the enameled wire along an X-axis direction, a Y-axis direction and a Z-axis direction, so the winding of coils is easier.

The invention provides a liquid cooling self-excitation type eddy current retarder with a salient pole structure, belonging to the field of automobile braking. The liquid cooling self-excitation type eddy current retarder comprises a retarder rotor (9), a retarder stator (5), a retarder coil (8), a retarder generator and a control module, wherein the retarder rotor (9) is a tooth-shaped rotary plate; the axial half-section of the tooth-shaped rotary plate is a reverse h shape; two bulges at the both sides of a dentate disc are two salient poles of the retarder rotor (9); the retarder rotor (9) is connected with a transmission shaft (13); the inner circle of the retarder stator (5) and the outer circle of the retarder rotor (9) are coaxial; and the retarder coil (8) is an individual coil, is mounted between the two salient poles of the retarder rotor (9), and is fixedly connected with the retarder stator (5). According to the liquid cooling self-excitation type eddy current retarder provided by the invention, the electric energy is saved and the large impact to an automobile storage battery when the retarder is started is avoided by using a self-generating manner; and the coil is sleeved in the middle of a rotor disc by using the individual coil which is wound in a concentrated manner, so that the winding, the installation and the control of the coil can be simplified.

The invention discloses a high-strength and high-toughness composite silver solder ring for in-situ synthesis of soldering flux. The high-strength and high-toughness composite silver solder ring comprises a silver solder ring body of a hollow structure. The silver solder ring body is formed by winding composite silver solder formed by a silver solder pipe and a flux core with which the silver solder pipe is filled. The flux core is prepared from boron micro-powder, sodium borohydride or potassium borohydride, potassium fluoborate, boric anhydride or boric acid, potassium fluoride or sodium fluoride or lithium fluoride, potassium bifluoride and potassium fluoroaluminate according to a certain proportion. The purpose of in-situ synthesis of the soldering flux through the boron micro-powder in the flux core and metal elements in the silver solder pipe is achieved, so that the content of the flux core is reduced, and when the content of the flux core is low, the solder still achieves good brazing manufacturability; meanwhile, due to the fact that the wall thickness of the solder pipe is increased, good toughness and high stiffness are achieved, the processing performance of the solder is greatly improved, the minimum diameter can be reduced to 0.8 mm, the solder can be easily wound into the solder ring with the intermediate diameter below 6 mm, and application and popularization of the automatic brazing process are facilitated.

The invention relates to a low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure comprising a stator and a rotor. The stator employs pear-shaped flat-bottomed grooves. Irregular grooves are disposed on a position, corresponding to the center of a stator tooth portion, on the outer circumference of the stator. A rotor outer circumference is formed by a plurality of four-segment arcs. The rotor is provided with a plurality of grooves in which permanent magnets are embedded. The grooves are flat-bottomed V-shaped grooves. The tops of the left groove and the right groove of each V-shaped groove are provided wedge-shaped grooves for preventing the permanent magnets from moving. The permanent magnets are embedded in the left groove and the right groove. Reinforcing ribs are arranged between the tops of adjacent flat-bottomed V-shaped grooves. Compared with a conventional motor with a built-in V-shaped permanent magnet, the low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure is decreased in permanent magnet magnetic leakage, increased in the utilization rate of the permanent magnets, and provided with a salient pole effect, fully utilizes reluctance torque, improves motor efficiency and power density, improves gap flux density waveform, reduces cogging torque and torque ripple, and effectively reduces core loss and eddy-current loss.

A stator is constructed by winding excitation coils around respective main poles in a hybrid permanent magnet type electric rotating machine. A rotor is constructed by fixing a first rotor unit, which consists of a pair of rotor cores and a magnetic material sandwiched between the rotor cores, and a second rotor unit, which has the same construction as the first rotor unit, to a rotation shaft. The rotor is assembled to the stator to form an assembled body. The magnet material of the first rotor unit is magnetized in the axial direction by a magnetizing flux passing through a half of the assembled body in the axial direction. The magnet material of the second rotor unit is magnetized in the axial direction in an opposite polarity by a magnetizing flux passing through the remaining half of the assembled body in the axial direction.

The invention discloses a wire distribution structure for gradient coils connected in a parallel and layered mode. At least one of a GX gradient coil, a GY gradient coil and a GZ gradient coil is of a structure with at least two layers, a certain layer of a certain gradient coil is adjacent to the other layer of the same kind of gradient coil or is adjacent to a certain layer of a different kind of the gradient coil in the space, main coils of all layers of the same kind of the gradient coils are connected in parallel. The invention further discloses a wire distribution method for the gradient coils connected in the parallel and layered mode. By means of the wire distribution structure and method for the gradient coils connected in the parallel and layered mode, the great difference between the GX coil performance and the GY coil performance is avoided, and the performance of the whole gradient coils is improved.

The invention discloses a spring steel wire heating, winding and cooling conveying device, relates to equipment used for manufacturing springs, in particular to equipment used for manufacturing springs by heating, conveying and winding steel wires and then conveying the springs. The spring steel wire heating, winding and cooling conveying device comprises a spring winding machine (1), a heating mechanism (2) and a spring cooling conveying mechanism (9), and is characterized in that the spring cooling conveying mechanism (9) comprises an annular conveying mechanism (11), wherein a plurality of magnetic attracting blocks (10) are installed on the annular conveying mechanism (11). The spring steel wire heating, winding and cooling conveying device can automatically convey and cool the springs, does not need manual operation, not only is high in efficiency, but also avoids safety risks.

The invention advances a new tooth electro time-grating displacement sensor able to make both dynamic and static measurement, making two groups of teeth on both stator / scale and rotor / slide, selecting two groups of teeth on the stator / scale or rotor / slide and staggering by half tooth to form orthogonal, not staggering the other two groups of teeth, forward and backward winding coils on the stator / scale and rotor / slide at regular tooth intervals, using two groups of coils as excitation coils and exciting by two orthogonal simple harmonic waves so as to obtain standing wave responses in the other two groups of coils as standing response coils, superposing the two standing waves and obtaining electric travelling wave whose phase shift directly reflects angular or linear displacement. And its stator / scale and rotor / slide framework can be machined by any common- precision machining device to assure uniform coil distribution, and it can replace any present static and dynamic measuring means to implement high-precision measurement.

The invention discloses a modular electrically-excited doubly-salient motor which comprises a shell, stator iron cores, excitation windings, phase-A armature windings, phase-B armature windings, phase-C armature windings, a rotor iron core and a rotary shaft. The shell is made of non-magnetic-permeability materials, and the stator iron cores are fixed to the inner side of the shell; each of the 3X modular stator iron cores is provided with two protruded stator poles which are connected with each other by stator yokes, and the various stator iron cores are not in direct contact with one another; the 6X stator iron cores are peripherally uniformly distributed; 5X protruded rotor poles are uniformly distributed on the rotor iron core; the polar distance between every two corresponding stator poles on the same stator iron core is equal to the polar distance of every corresponding rotor poles; the corresponding excitation winding is wound on one of the stator poles of each stator iron core, the corresponding armature winding is wound on the other stator pole of each stator iron core, and the armature windings are divided into the phase-A armature windings, the phase-B armature windings and the phase-C armature windings according to difference of phases; the X is a positive integer. The modular electrically-excited doubly-salient motor has the advantages that magnetic circuits and circuits of three-phase windings of the modular electrically-excited doubly-salient motor are independent from one another, accordingly, faults can be constrained in one phase, influence of the faults on the other phases can be reduced, and the faults can be prevented from being propagated.

The invention discloses a traction transformer series-connected in one box by two low voltage winding layers for AT (Auto-Transformer) power supply, relating to traction transformers. The ordinary traction transformer for AT power supply comprises a T single phase traction transformer and an M single phase traction transformer, the two transformers are necessarily and independently designed, the structure is complex, the manufacturing difficulty is big, and design requirements are difficultly satisfied. The traction transformer is characterized in that a core limb group comprises four core limbs, and three winding layers are sleeved on the core limbs from inside to outside; the first winding layers of the first core limb and the third core limb are power supply side windings, and the second winding layer is a feed side winding; the first winding layers of the second core limb and the fourth core limb are the feed side windings, and the second winding layer is a power supply side winding; and the power supply side windings on the first core limb and the second core limb and the power supply side windings on the third core limb and the fourth core limb are respectively connected in series. In the invention, because the T single phase traction transformer and the M single phase traction transformer are uniformly designed into the traction transformer, the structure is simple, the design requirement is satisfied, and the design cost and the production cost are reduced.

The invention discloses a four-phase double-faced flat plate type transverse magnetic field permanent magnet motor for solving the technical problem that a stator armature of an existing three-phase assembled magnetic type transverse magnetic field permanent magnet motor is difficult to wind. According to the technical scheme, the motor is formed by two rotor discs and a four-phase stator, wherein each rotor disc corresponds to a two-phase stator, each motor rotor is formed by the fact that a permanent magnet is embedded in a permanent magnet embedded plate, and a rotor strength reinforcing ring is additionally arranged in the center of each rotor; each motor stator is formed by a winding, an E-type silicon steel sheet and a conducting magnetic stripe, each E-type silicon steel sheet is folded to be a motor stator magnetic pole, and one conducting magnetic stripe is added between every two stator magnetic poles; the armature of each phase stator is formed by an inner circular ring winding and an outer circular ring winding which are placed in two grooves of each E-type silicon steel sheet respectively, the four-phase stator of the motor is positioned through screw rods on the periphery, 180 / 4 N mechanical angles are sequentially staggered, and the N is the number of poles of the motor. Through the arrangement of the structure, the stator windings of the motor are designed to be of a circular ring shape, winding of the armature of the motor is simplified, and machining and assembling of the motor are facilitated.

The invention discloses a high-speed main shaft electromagnetic type field dynamic balancing device and method. According to the high-speed main shaft electromagnetic type field dynamic balancing device and method, both on-line dynamic balance and off-line dynamic balance can be achieved. The balancing device comprises four identical U-shaped annular iron cores and a sleeve, wherein the sleeve is composed of four corresponding bosses and is fixed on a main shaft, the wrap angle of each boss is 90 degrees, magnet exciting coils and force measuring coils are wound around the iron cores, electromagnetic force can be generated between each iron core and a corresponding boss, the electromagnetic force can be changed along with the change of an exciting current, the direction of the electromagnetic force is the same as the direction of a corresponding boss all the time, and the value and the direction of the current led into the magnet exciting coils can be changed to obtain any kind of force (within a set value) which can be in any direction and can rotate along with the main shaft to counteract unbalanced force caused by unbalanced quantity. The high-speed main shaft electromagnetic type field dynamic balancing device is simple, coils can be wound easily, machining is convenient, the on-line dynamic balance and the off-line dynamic balance can be combined, the defects that a traditional electromagnetic type balancing head is complex in structure and limited in balancing capacity are overcome, and high-rotation-speed, high-accuracy and high-efficiency field dynamic balancing can be achieved.

The invention discloses a sulfur hexafluoride gas insulating transformer which includes an iron core, a low voltage loop, a high voltage loop, the upper end insulator of the low voltage loop, the lower end insulator of the low voltage loop, the upper end insulator of the high voltage loop, the lower end insulator of the high voltage loop, the main insulating paper cylinder of the loop and the bar stay of the loop, a loop pressure pad and a splint for a core and winding assembly; the expansion lines of the beginning end and the tail end of the low voltage loop respectively cross the insulators of the upper and the lower ends, and the loop pressure pad and the splint for the core and winding assembly to lead out the core and winding assembly from the two ends of the core and winding assembly; the high voltage loop is divided into an upper path and a lower path in parallel; the high voltage loop is twisted by adopting an inner shielding-continuous mode; a plurality of winding coils at the starting end of 110KV of the high voltage loop adopt double-section screen structures; the expansion lines of the beginning ends of 110KV of the upper half path and the lower half path of the high voltage loop penetrate the core and winding assembly and are led out from the middle part; the expansion lines of the tail ends of the upper half path and the lower half path of the high voltage loop penetrate of the high voltage loop penetrate the insulators of the upper and the lower end parts of the high voltage loop, the loop pressure pad and the splint for the core and winding assembly and lead out the core and winding assembly from the two ends of the core and winding assembly. The localized concentration of the electric field at the end part of the loop of the transducer of the transformer is low; the anti-short circuit ability of the high voltage loop is high; the manufacture is easy; the materials are saved and the cost is low.

The invention relates to a brushless motor structure, specifically to a slotless permanent magnet brushless motor structure, which consists of a motor housing, a magnetic ring, a winding stator, a permanent magnet rotor, a silicon steel stack and a rotary shaft from outside to inside respectively. Each stator coil consists of two semicircular stator frameworks with circular windings, the frame is provided with a hollow cavity in the middle, and the permanent magnet rotor is wrapped in a hollow cavity of the stator coil and rotates in the hollow cavity. Or, the stator coil is a hollow cavity coil formed by coiling the windings and being formed by high temperature glue. After the two hollow cavity coils are combined, the permanent magnet rotor is installed in the hollow cavity and a gap is left between the permanent magnet rotor and the stator coil and the permanent magnet rotor can rotate within the hollow cavity. The slotless permanent magnet brushless motor structure creatively applies the structure which generates torque by the action of the inner magnetic field of the stator and the rotor, and the utilization ratio of magnetic energy is much higher than that of the conventional motor structure.

The invention relates to a transformer with a shell and a magnetic ring. The transformer comprises the magnetic ring and an insulated shell; the magnetic ring is arranged in the insulated shell; a winding hole is formed in the shell; a central hole of the magnetic ring corresponds to the winding hole; the shell is provided with a plurality of pins; multiple groups of copper wires are wound outside the shell; the copper wires pass through the winding hole and are wound outside the shell; and the ends of the copper wires are connected with the pins. The invention relates to the transformer with the shell and the magnetic ring, and in the transformer, insulation paint is not needed to be sprayed on the surface of the magnetic ring, and copper wire direct pins are not adopted.

The invention discloses a transformer and belongs to the field of electronic products. The transformer comprises an annular closed iron core; an annular framework is encircled on the wall of the annular closed iron core; at least four annular frameworks serving as insulation frameworks are provided; and a wire is coiled on the outer surface of each of the annular frameworks so as to form a winding. As the windings of the transformer are coiled on the annular frameworks, the coiling is easy to realize, the processing difficulty is reduced, the production efficiency is improved and the product cost is reduced; and as at least four annular frameworks are arranged on the transformer and set to be primary windings and secondary windings as required, the heat dissipation effect is good and the performance of the transformer is guaranteed effectively. Furthermore, by the transformer, the two difficulties of the conventional transformer are reduced basically, so the transformer is easy to popularize.

The invention provides a stator and a rotating linear two-degree-of-freedom permanent magnet motor with a modular structure. The rotating linear two-degree-of-freedom permanent magnet motor with the modular structure comprises a stator and a rotor, and the stator comprises a stator core, a rotating motion winding and a linear motion winding; the stator iron core is formed by a plurality of same modular iron core units in a three-phase mode on the circumference. Stator grooves are formed in the axial direction and the circumferential direction of an inner surface of the stator iron core at thesame time, so that stator teeth are distributed in an array mode and evenly distributed on all the modular iron core units. The rotating motion winding is wound on stator teeth which are axially arranged along an inner surface of the stator core along the linear motion direction to form a phase group centralized winding for driving rotary motion; and the linear motion winding is wound on the stator teeth arranged along the circumferential direction of the inner surface of the stator iron core along the circumferential direction to form a phase group centralized winding for driving linear motion. The structure is simple, the manufacturing is easy, and the material utilization rate is increased.

The invention provides a single-phase outer rotor switch reluctance generator with U-shaped stator teeth. The single-phase outer rotor switch reluctance generator comprises a set of mutually-independent U-shaped stator teeth, a ring winding and finger-shaped rotors, wherein the finger-shaped rotors are installed outside stator magnetic poles. Every two U-shaped stator teeth are fixed through a disk which is provided with a rectangular groove and made of non-ferromagnetic materials, and the U-shaped stator teeth are fixed to a shell of the generator. The rotors are composed of finger-shaped iron cores and connected to a shaft of the generator through keys. The number of teeth of the rotors is the same as the number of the stator teeth. The single-phase winding of the generator is an annular coil and is wound around the interior of U-shaped tooth grooves of stators. The single-phase outer rotor switch reluctance generator with the U-shaped stator teeth is simple in structure, a motor and a power converter are low in manufacturing cost, the winding can easily conduct wire winding, the increase of the number of the stator magnetic poles and the number of rotor magnetic pole of the generator cannot affect wire winding space of the winding, and the generator is more suitable for low-rotating-speed application. Magnetic fields formed in the U-shaped stator teeth are short magnetic circuits and are mutually independent and are not interlinked, and reliability of the generator is high.

The invention relates to a single-phase traction transformer for a high-speed electrified railway in an AT (auto-transformer) power supply way. The conventional traction transformer for AT power supply consists of a T-transformation single-phase traction transformer and an M-transformation single-phase traction transformer, and the two transformers need to be separately designed, have complicated structures and high manufacturing difficulty and difficultly meet design requirements. The single-phase traction transformer is characterized in that: an iron core is in a single-phase two-column structure; iron core columns are sleeved with five concentric winding layers from the inner side to the outer side; a first winding, a second winding, a third winding and a fourth winding on a power supply side are connected in series to form a power supply side output end; a third winding, a fourth winding, a first winding and a second winding on a feed side are connected in series to form a feed side output end; and a primary side first winding is connected in series with a primary side second winding to form a phase A input end and a phase B input end. In the single-phase traction transformer, the T-transformation single-phase traction transformer and the M-transformation single-phase traction transformer are uniformly designed into the traction transformer, so that the single-phase traction transformer has a simple structure, meets design requirements and lowers design and production cost.

A LCL structure shaping in Pi and working method based on transferring wireless energy of array lines ring belongs to the technical field of transferring wireless energy. The invention solves problems of higher cost for preparing equipment existing in LCL compensation network, adjusting compensation inductance value and limiting the expansion of equipment. One outfan of a high frequency pumping unit is simultaneously connected with one end of a first power switch and one end of a first array coil. The other end of the first array coil is simultaneously connected with one end of a first compensation capacitor and one end of a compensation inductance. The other end of the first power switch is linked with the other end of the first compensation capacitor. Another outfan of the high frequency pumping unit is simultaneously connected with one end of a second power switch and one end of a second array coil. The other end of the second array coil is simultaneously connected with one end of a second compensation capacitor and the other end of the compensation inductance. The other end of the second power switch is connected with the other end of the second compensation capacitor. The technology is applied in the field of transferring wireless energy.

The invention relates to a damping drum device and a ball damping tall-building escape apparatus with same. The damping drum device comprises a base plate and a rope drum and is characterized in that the base plate is connected with a center shaft vertically; the rope drum is sleeved on the center shaft; the rope drum is matched with the center shaft through a bearing; at least two channels for the radial reciprocating movement of balls are uniformly distributed on the matching surface of the base plate and the rope drum; and at least two arched channels which are connected to a circle in radial direction are separately and uniformly distributed on the adjacent end faces of the rope drum and the base plate along the circumference. By using the invention, damping can be generated in the process when a worker goes down from the tall-building and the deceleration effect can be realized; and the damping principle of the mechanism is that when sliding in the cross channels, balls are hampered to generate damping. The device has low friction and is reliable; and the entire device has the advantages that the device has small volume and light weight, is easy to carry, the speed can be regulated, etc.

The invention provides a three-dimensional formed silk material and an FDM three-dimensional forming method. The three-dimensional formed silk material is prepared from raw materials of following components of inorganic powder, a binding agent and an auxiliary agent; the content of the inorganic powder is 90 wt% or above; the binding agent is composed of POM and TPE; the melting point of POM is between 180 DEG C and 190 DEG C, and the shore hardness of TPE is between 0 and 10 degrees; and the auxiliary agent is composed of a silicone powder lubricating agent and a zinc oxide heat stabilizing agent. The three-dimensional formed silk material is good in toughness, wire winding is easy, head blocking is not likely to be caused during printing, and a printed three-dimensional object is not prone to layering.

The invention relates to the field of magnetic ferrites, in particular to a ferrite magnetic core. The ferrite magnetic core is characterized by comprising a circular central cylinder and a square framework. One side of the square framework is provided with a U-shaped opening, and the circular central cylinder is arranged in the U-shaped opening. The ferrite magnetic core has the advantages that the magnetic core is in the stereoscopic structure of the central cylinder, is wound by windings completely except the tail end contacting with a PCB (printed circuit board) and is fine in shielding property. Meanwhile, the section of a wound coil is circular, so that winding of the coil is easier. Impact of an air gap reserved on a contact surface of two magnetic core pieces which are assembled is minimized by the aid of the unique shape, and the ratio of the size to the general space utilization rate is increased.

The present invention discloses a symmetric double cascade DC conversion unit with circulating current reverse self-elimination capability. The unit can be used for DC voltage interconnection of different voltage levels under the condition of high voltage and high power. The DC conversion unit comprises two cascade modules, wherein input ends of the two cascade modules are in series connection, and output ends of the two cascade modules are also in series connection. Each cascade module consists of two modular multilevel converter (MMC) structures and an intermediate frequency transformer. The DC conversion unit is subjected to series-parallel modular combination to obtain a high voltage and high power DC converter, and finally the object of DC voltage conversion is realized. According to the unit, energy is transmitted dispersedly and the application of the single intermediate frequency transformer that may become the bottleneck of system application in a high voltage and large capacity situation is avoided, so that the unit has the advantages that the intermediate frequency transformer is easier to wind as compared with a conventional MMC type DC converter. According to the unit, a symmetric double cascade structure is used, so that the circulating current generated by the two MMCs in each cascade module is reversely self-eliminated via control; and DC conversion of more wide transformation ratio is realized by using a structure of the MMCs combined with series-parallel modular combination.

The invention provides a rope-free curtain used for simplifying the winding mode of a digging rope. According to the technical scheme, the rope-free curtain comprises a moving part, an extensible part, a pulling rope fixing base and a pulling rope. One end of the extensible part is used for being fixedly connected with an external environment, the other end of the extensible part is connected with the moving part, and the moving part moves left and right along with the extensible part. The pulling rope fixing base is used for being fixedly connected with the external environment. The moving part is provided with at least one first transverse pillar which is transversely arranged, the pulling rope fixing base is provided with at least one second transverse pillar which is transversely arranged, and the pulling rope which penetrates through a curtain body bypasses the first transverse pillar and the second transverse pillar and then is fixed on the moving part or the pulling rope fixing base.

The present invention relates to a novel single-layer self-sealing lacquer transposed cable which is mainly used for the large-scale electric power transformer winding. Two rows with broad faces contacting with each other are combined a certain number of enameled copper flat wires (1). The upper part and the lower part of two rows of enameled copper flat wire (1) do transposition with a same rotating direction along the narrow surface. The broad surface (b) of the enameled copper flat single wire (1.1) at the contacting part of the broad surface of two rows of enameled copper flat single wire (1) is coated with self-adhering epoxy resin paint. The narrow surface (a) of the enameled copper flat single wire (1.1) is not coated with self-adhering epoxy resin paint. As the surface of the enameled copper flat wire is coated with self-adhering epoxy resin paint with better self-adhering power, the invention is coiled as easy as the routine transposition conducting wire in the coiling process of the winding because of the non-adhering of the self-adhering lacquer. In the drying process of the winding and under the function of the temperature and pressure, the self-adhering resin paint is melted, bonded and solidified for pasting a plurality of transposition single wire to a whole arranged with breadth and phase. Thereby not only the mechanical strength of the winding is maintained, but also the heat radiating capacity is increased.

The invention provides a nondestructive testing device for a ferromagnetic slender component based on an improved coil. The nondestructive testing device comprises upper and lower detection probes, wherein the two detection probes clamp the ferromagnetic slender component from top and bottom and are symmetrically arranged; and a magnet yoke, two permanent magnets and an iron core are respectively arranged on one side, close to the ferromagnetic slender component, of each detection probe, the two permanent magnets are respectively arranged at the left and right ends of the magnet yoke, the iron core is arranged on the magnet yoke and is located between the two permanent magnets, an arc-shaped protruded part is arranged at one end of the iron core, an arc-shape groove is formed in the other end of the iron core, vertical planes are respectively arranged on the left and right sides of the iron core, and the iron core is wound with an induction coil. The nondestructive testing device has the beneficial effects that the winding of the coil is simplified, meanwhile, the signal to noise ratio of a detection signal is increased, the influence caused by an extraction distance on a detection result is greatly reduced, and the difficulty caused by different sizes of the section surfaces of the coils to the analysis of the detection result is eliminated.

The invention discloses an alloy cylindrical pipe capable of rotating relatively. The alloy cylindrical pipe comprises an upper small-diameter disc, a fixator, an inner sleeve cylinder, an alloy cylindrical pipe body, a lower large-diameter disc, a baffle and balls. The upper small-diameter disc is arranged at the upper end of the alloy cylindrical pipe body. The inner sleeve cylinder is arranged inside the alloy cylindrical pipe body. The lower large-diameter disc is installed at the lower end of the alloy cylindrical pipe body. The baffle is arranged between the inner sleeve cylinder and the alloy cylindrical pipe body. The balls are arranged on the baffle. The inner sleeve cylinder is movably connected with the alloy cylindrical pipe body. Chamfer angles are arranged at the circumferential end of the upper small-diameter disc and the circumferential end of the lower large-diameter disc. The diameter of each ball is equal to the distance between the inner sleeve cylinder and the alloy cylindrical pipe body. Compared with the prior art, the alloy cylindrical pipe capable of rotating relatively has the beneficial effects that using is convenient, and friction resistance during unwinding can be effectively reduced; meanwhile, manufacturing cost is low, the service life is long, winding is easy, and the alloy cylindrical pipe is suitable for application and popularization.

The invention discloses a production die of a lantern skeleton and a use method of the production die, and belongs to the technical field of dies. The production die of the lantern skeleton comprises a die body, the die body comprises connecting parts and a plurality of bone pieces, upper clamping openings are formed in the periphery of the upper connecting part, lower clamping openings are formed in the periphery of the lower connecting part, a plurality of grooves are formed in the protruding outer edges of the bone pieces, and the grooves in the assembled bone pieces circle from the protruding ends of the bone pieces to the other protruding ends of the bone pieces along the spiral disc shape. Winding and manufacturing of the lantern skeleton can be rapidly, simply and conveniently carried out along the grooves of the bone pieces, the manufacturing precision of the lantern skeleton is high, and the production efficiency is improved; and meanwhile, the die is conveniently disassembled, and a lantern is not damaged. The die is simple and reasonable in structure, convenient to manufacture, convenient to store and transport, capable of being repeatedly used, high in practicability, low in construction cost and easy to popularize. According to the use method of the production die of the lantern skeleton, the manufacturing process is simple and rapid, operation is easy, appearance is attractive, and economic benefits are good.