134results about How to "Overcoming noise" patented technology

The invention provides a birotor permanent magnet motor and a washing machine with the same. The birotor permanent magnet motor comprises an inner rotor, a stator and an outer rotator which are sequentially arranged from inside to outside, and is characterized in that both the inner rotor and the outer rotor are permanent magnet rotors, and the stator comprises a magnetic modulation ring and a stator winding arranged on the magnetic modulation ring in a wound mode. The birotor permanent magnet motor is based on the magnetic field modulation principle and has a birotor structure, the outer rotor and the inner rotor can rotate according to certain proportional relation, and high-performance output of the motor under operating conditions of a low speed and a high speed can be met at the same time. When the birotor permanent magnet motor drives the washing machine to operate, not only are design requirements for low-speed large torque output and high-speed small torque output of the motor under the optimal operating state met, but also the structures of a belt pulley, a reduction gearbox and the like in a traditional washing machine are eliminated, transmission efficiency of the motor is improved, and meanwhile the defects of high noise, machine body vibration and the like of the traditional washing machine are overcome.

The invention discloses a method and system for diagnosing bearing faults of a large-size wind turbine bearing. The method comprises the following steps of: firstly, measuring a vibration signal of a wind turbine main shaft bearing; secondly, automatically extracting a resonance frequency band of the bearing faults by adopting a self-adaptive spectrum kurtosis technology and obtaining a fault feature frequency by adopting a narrow-band filtering and envelope demodulation technology; and finally, comparing the fault feature frequency with a theoretical calculating value, positioning and recognizing to obtain a bearing fault type. The method and system disclosed by the invention are suitable for actual operation conditions of an actual wind turbine; and according to the method and system, the influence from non-stable work conditions and work condition noises of the wind turbine is overcome, the resonance frequency band caused by the bearing faults can be automatically recognized without manual operation and bearing fault types can be recognized automatically and quickly.

The invention discloses an engine fault prediction method. The method comprises the following steps that effective measurement data of a plurality of sensors of an engine are obtained; the effective measurement data are subjected to normalization processing; the effective measurement data obtained after normalization processing are sliced, and a plurality of slice samples are formed; the multiple slice samples are sent into a deep nerve network to be subjected to feature extraction, and after feature extraction, the slice samples are connected to a fully-connected network; and according to output of the fully-connected network, classification is conducted through a softmax classifier, and the left service life of the engine is determined. According to the provided engine fault prediction method, the process is small, operation is easy, and the engine fault prediction method can be widely applied to various engines of aircraft.

The invention provides a small infrared aerial target detection method based on non-downsampling contourlet transformation. The method includes the following steps of 1, non-downsampling contourlet transformation, wherein non-downsampling contourlet transformation first-level decomposition is performed on a small infrared target image, and a band pass sub-band is discomposed into four-direction high-frequency sub-bands; 2, background suppression, wherein low-frequency influences are removed, and thresholding processing is performed on a high-frequency portion; 3, coefficient mapping, wherein coefficients left by the four-direction high-frequency sub-bands are mapped to a gray level space in a linear mode; 4, high-frequency image segmentation, wherein four-direction high-frequency sub-band images are segmented into binaryzation images; 5, binary high-frequency image noise reduction, wherein small bright noise points in the binary high-frequency images are eliminated; 6, detection of related small targets in dimension, wherein the four-direction high-frequency sub-band images get along with each other to obtain a small target single-frame detection result; 7, small target sequence detection, wherein comprehensive vote is performed on multi-frame images to intercept and capture small targets. According to the method, the problem of small aerial target detection under the complicated infrared background is solved.

The invention discloses a novel polyether-ether-ketone (peek) bar which is designed for solving the problems of slow crystallization speed caused by too large viscosity during processing and being too difficult to be processed caused by good metal cohesiveness after the forming by processing existing in a present PEEK bar. The invention comprises the following components according to weight proportion: 55.5 parts to 100 parts of peek resin, 2 parts to 4 parts of lubricant, 0.05 part to 0.5 part of nucleating agent and 0.05 part to 43 parts of filler. The invention also discloses the preparation method and use of the bar and has the advantages of fast molding, good processing performance and wide use.

The invention relates to a double-blade mowing device which comprises a shell, wherein a first motor and a second motor are arranged in the shell; the output shaft of the first motor is provided with a first blade; the output shaft of the second motor is provided with a second blade; the first blade and the second blade are staggered between the front and back of the interior of the shell; and at least parts of vertical projections of the first blade and the second blade are overlapped along the moving direction of a cropper. According to the double-blade mowing device, the mowing current can be greatly lowered, the consumed power is lowered, and the single-time use time of a direct-current battery pack is prolonged; and the mowing time is longer and the mowing area is bigger on the premise of same battery volume.

The invention discloses an omnidirectional mobile device for an electric wheelchair, comprising a driving chassis, a swing mechanism and a supporting chassis, wherein a driving gear is installed on the supporting chassis, and the supporting chassis plays a role in supporting; a direction locking caster is arranged on the driving chassis, and the swing mechanism is used for connecting the supporting chassis and the driving chassis and causing the driving chassis to move axially along the swing mechanism. The omnidirectional mobile device for the electric wheelchair implements three modes of linear motion, curvilinear motion and side moving motion through cooperation of the direction locking caster and the driving gear. And the omnidirectional mobile device for the electric wheelchair has the following advantages: the omnidirectional mobile device can implement omnidirectional flexible movement, and has a function of implementing omnidirectional motion without turning radius; the omnidirectional mobile device is high in load capacity, non-slipping, high in controllability, quiet, high in reliability and low in production cost.

The invention relates to animal muscle diagnosis and human body bioelectricity acquisition and recognition. The invention relates to electrode conductors for collecting surface electromyography signals, a functional buffer stage circuit, a preposing differential amplifying circuit, a filter circuit, a double T trap circuit and a back-stage amplifying circuit; the preposing differential amplifying circuit comprises a preceding stage differential amplifying circuit and a secondary differential amplifying circuit; the output end of the preceding stage differential amplifying circuit is also connected with a voltage follower circuit and an inverse amplifying feedback circuit which is communicated with the voltage follower circuit; the output of the inverse amplifying feedback circuit is communicated with the root of the electrode conductor; the filter circuit is the fifth-order Butterworth filter circuit; the electrode conductors are two silver electrodes which are pasted on the surface of skin; and the distance between the two silver electrodes is 8-12mm. The active double electrode surface electromyography sensor has good fixed mode, stable collected signals and strong signal filtering function, causes the capability of the circuit resisting the interfering of the power frequency to be increased and overcomes the defects of the high noise brought about by the electrode wiring, larger whole volume of the sensor and the like.

The invention discloses capsule production line equipment, which comprises a slab overturning mechanism, a circulating capsule drying device and a slab lifting mechanism, wherein the lifting mechanism drives the slab to overturn stably, the service lives of a gear and a rack are long, no compact or noise is generated during an overturning process, the lifting mechanism does not need to stop to wait for a slab to be pushed into a clamping groove, the slab enters the clamping groove automatically, the slab conveying time is saved, the continuity of a production line is better, and the processing efficiency of the capsule production line is improved; the defect that the slab can only be pushed in when a slab lifting device descends to the lowest position is overcome by the slab lifting mechanism, at least two slabs can be lifted at a time, and the work efficiency of the capsule production line is greatly improved; the occupied space of the circulating capsule drying device is smaller, the utilization rate is high, lead screws at each layer move synchronously, and slab pushing mechanisms at multiple layers can be driven by one motor, so that resources are saved, and the synchronism of each slab pushing mechanism is ensured.

The invention discloses a self-powered environmental-friendly street lamp and a square lamp, and belongs to the technical field of new energy power supply equipment system device. The self-powered environmentally-friendly street lamp and the square lamp comprise that: a main shaft (3) passes through a rain cover (2); a solar photovoltaic panel or horizontal axis wind-driven generator (1) is arranged at the top of the main shaft; and a vertical axis wind-driven generator is arranged in the middle part of the main shaft. The self-powered environmentally-friendly street lamp and the square lamp are characterized in that: the main shaft (3) made of a large-caliber steel pipe directly supports and is in through connection with the solar photovoltaic panel or the horizontal axis wind-driven generator so that the vertical axis wind-driven generator, the horizontal axis wind-driven generator and the solar photovoltaic panel are coaxially used so as to comprehensively utilize the three generation functions; a lamppost is provided with an air passage and an air inlet (12) to integrate the designs of the internal ventilation, heat dissipation and induced wind power and the external natural wind power with the internal structure of the generator into a whole, scientifically exert various natural potentials, reduce occupied space and obviously and effectively increase the generation effect.

The invention relates to a horizontal luffing grab portal crane, including a four-bar linkage level luffing boom system, a travelling mechanism and a gantry structure. The crane is characterized in that: a luffing mechanism comprises a triple screw, a screw pedestal and an electric transmission mechanism. The outside of the triple screw is provided with a telescopic cover, the inside of the screw pedestal is equipped with a sleeve with nuts, and two ends outside the sleeve are provided with bearings in the screw pedestal. The electric transmission mechanism comprises a motor, a driving gear and a brake apparatus. The end of the triple screw is hinged to a boom, and the luffing mechanism is equipped with a speed adjustable control system. The four-bar linkage boom system and a gantry beam are both girder construction which employs a T-shaped structure and a rectangular pipe. The T-shaped structure is a main chord member, and the rectangular pipe as a web member is welded on a web member gusset plate. In the blanking process, the T-shaped structure and the web member gusset plate are integrated through numerical control cutting. The crane of the invention has high operating cycle frequency which can reach 6 million times, high luffing speed, smooth running of grab bucket, high operating efficiency and long service life.

The invention relates to the field of electromechanical engineering and concretely discloses a magnetic gear transmission. The magnetic gear transmission comprises an internal rotor, an external rotor and a stator which are sheathed concentrically in the radial direction in an embedding way; a non-contact structure with the clearance is respectively arranged between the internal rotor and the external rotor and between the external rotor and the stator; the internal rotor is positioned on the internal layer and provided with at least one pair of internal rotor magnetic poles which are arranged in pairs and made of permanent magnetic material; the external rotor is positioned on the middle layer and provided with the comb-structured external rotor magnetic poles which are uniformly distributed in pairs and made of ferromagnetic material; the stator is positioned on the external layer, provided with continuous combs and made of ferromagnetic material; and the internal rotor magnetic poles and the external rotor magnetic poles are coplanar with the stator comb. The magnetic gear transmission has the advantages of high efficiency, small noise, easy maintenance, long service life and the like.

The invention discloses an extraction/compensation mechanism-based sampling clock synchronization method in an OFDM (Orthogonal Frequency Division Multiplexing) system. The method combines a sampling clock skew estimation method based on pilot sub-carrier average phase deviation increment detection with an extraction/compensation clock synchronization compensation mechanism according to sampling clock skew quantity. The method is used for solving the problem of sampling time migration caused by mismatching of clock frequency in the analog/digital conversion process of a receiving end and a digital/analog conversion process of a transmitting end of the OFDM system, so that interference between OFDM sub-carriers and phase deviation of a constellation diagram after demodulation are effectively reduced. With the method, use of an expensive voltage-controlled oscillator is avoided, and decline of system performance caused by frequently searching an FFT (Fast Fourier Transform) window by a conventional symbol synchronization module is also avoided, so that the sampling clock synchronization method provided by the invention is low in hardware cost and high in efficiency.

The invention discloses an oil-electricity dual-power driving device of a hydraulic lifting system of an aerial operation car, which comprises a gearbox, a force extractor, a universal joint transmission device and a dual-power coupling device sequentially input by a first power source. The dual-power coupling device also comprises a second power source, and the second power source and the first power source are merged and output to the same hydraulic pump. Compared with a traditional oil-electricity dual-power driving hydraulic lifting system of the aerial operation car, the invention saves one hydraulic pump and can achieve high selection possibility of system structures and control modes. Accordingly, the invention can provide a wider design space for further optimizing the energy-saving environmental-protection performance of the hydraulic lifting system of the aerial operation car.

The invention relates to a telephone voiceprint entrance guard, and relates to an entrance guard apparatus. According to the invention, with the telephone voiceprint entrance guard, automatic access controlling voiceprint verification can be realized through a telephone, and jactitator identity can be easily identified. The entrance guard comprises a main controlling server, a telephone exchange, a voiceprint entrance guard controller, a network switch or a hub, a managing device, a bus, a telephone wire, a conduction-through twisted pair and a data trunk. The telephone exchange is connected to the main controlling server through the data trunk. The telephone exchange is connected to the voiceprint entrance guard controller through the telephone wire. The voiceprint entrance guard controller is connected to the network switch or the hub through the conduction-through twisted pair. The network switch or the hub is respectively connected to the main controlling server and the managing device through the bus.

The invention discloses an image de-noising method based on an improved two-dimensional experience modal decomposition algorithm. The method comprises steps of firstly, carrying out adaptive decomposition on a to-be-de-noised image through the traditional BEMD algorithm to obtain various orders of IMFs and measuring the similarity between probability density functions of the IMFs correspondingly and a probability density function of the to-be-de-noised image; then, according to a similarity measurement value, distinguishing boundary index values of noise leading modal function and a signal leading modal function; using a wavelet de-noising algorithm to carry out de-noising processing on the noise leading modal function to obtain an actual image noise; reconstructing multiple images with the same signal to noise ratio with an original image and carrying out accumulation and averaging, thereby achieving that compressing the noise in the low-order IMF; and finally, using the BEMD-DT to carry out de-nosing processing on the average image. According to the invention, by de-noising the image, de-noising effects which are better that that of wavelet de-noising and traditional BEMD de-noising method are achieved.

The invention relates to a micro-processing air conditioning system and method. The micro-processing air conditioning system comprises a setting subsystem, an air subsystem, a water subsystem, a detection sensing subsystem and a micro-processing control subsystem, wherein the micro-processing control subsystem performs data processing according to set parameters by combining detection parameters and system feedback operation parameters, and system operation is controlled in real time in a micro-processing mode. The micro-processing air conditioning method includes steps of 1 setting system operation parameters, starting the system, and adjusting the system parameters according to user requirements; and 2 performing data processing according to the set parameters by combining the detection parameters and the system feedback operation parameters, adjusting and controlling the system in real time, and adjusting system cycle operation in the micro-processing mode. The micro-processing air conditioning system and method have the advantages of energy conservation, high efficiency, adjusting automation and flexibility and structure compactness, can well adapt to extreme changes of climatic environments and can be independently used for fresh air conditioning.

The invention discloses a video flame detection method, device and system. The method comprises the following steps: extracting a flame suspected area in a video image; carrying out outline extraction processing and image segmentation processing on the flame suspected area to obtain a plurality of flame suspected small rectangular areas; and carrying out flame area extraction on the flame suspected small rectangular areas by the fluctuation characteristics of light stream and flame, and judging whether a video image has flames or not according to an extraction result. The method can obtain the flame suspected area by foreground segmentation and color information, utilizes the light stream to detect the motion characteristics of the flame, judges whether the area has the flame or not through the fluctuation situation of a flame angular point so as to overcome the defects of low video flame detection accuracy, high false alarm rate, high influence degree by noise and the like in the traditional flame detection technology, and solves the problems of poor flame characteristic extraction effect and difficulty in flame positioning in the prior art.

The invention provides a color selector utilizing electric-control automatic distribution of a material. The color selector comprises a vibration feeder, a chute, a material distribution tank, a material collection tank and a color selector control unit. The color selector control unit comprises a singlechip control panel, a relay and a power supply. When a material to be removed is detected, the singlechip control panel transmits a control signal and the motion of an electromagnetic push rod is controlled by the relay. A movable baffle plate is arranged in the material distribution tank. The electromagnetic push rod controls swinging of the movable baffle plate. The material collection tank comprises a material collection cabin A and a material collection cabin B. The color selector solves the problem that an air-compressor gas injection method has a high cost, large noise and poor safety. The color selector has a simple structure and a fast reaction rate, does not damage grain materials, is convenient for operation, has a high automation degree and can satisfy people requirements on modern grain seed and food safety.

The invention provides a hybrid field signal source positioning method based on a symmetrical nested array. The hybrid field signal source positioning method comprises the following steps that an antenna array is set, wherein the antenna array is the symmetrical nested array; a far-field signal DOA is estimated to obtain an estimation value of the far-field signal DOA; the near field component isseparated from the far field component; a fourth-order cumulant virtual difference array of a near-field signal is calculated; an estimation value of the near-field signal DOA is obtained by using spectral peak search; and according to the near-field signal DOA estimation value, the near-field signal distance is estimated to obtain a near-field signal distance estimation value. The hybrid field signal source positioning method uses mixed-order statistics, and compared with a second-order statistic algorithm, the hybrid field signal source positioning method solves the problems of Gaussian noise interference and reduction of degree of freedom by half; the symmetric nested array and the fourth-order cumulant virtual differential array are used for improving the estimation accuracy of far-field DOA, near-field DOA and a near-field distance; oblique projection technology is utilized to separate the far-field and near-field components, and thus, it is not necessary to distinguish the far-field signal from the near-field signal according to distance parameters; and therefore, the number of search is reduced, and the computational complexity of the algorithm is further reduced.

The present invention relates to a two-level comparator circuit, belonging to the technical field of analog integrated circuits. The two-level comparator circuit comprises an input level and a latch level. The input level comprises a first N-channel metal oxide semiconductor (NMOS) transistor (MN1), a second NMOS transistor (MN2), a third NMOS transistor (MN3), a first p-channel metal oxide semiconductor (PMOS) transistor (MP1), a second PMOS transistor (MP2), a third PMOS transistor (MP3) and a fourth PMOS transistor (MP4). The latch level comprises a fourth NMOS transistor (MN4), a fifth NMOS transistor (MN5), a sixth NMOS transistor (MN6), a seventh NMOS transistor (MN7), an eighth NMOS transistor (MN8), a ninth NMOS transistor (MN9), a fifth PMOS transistor (MP5), a sixth PMOS transistor (MP6), a seventh PMOS transistor (MP7) and an eighth PMOS transistor (MP8). Due to reset of a node X+ and a node X- in a latch level circuit, circuit maladjustment and noise are lowered. A pair of cross-coupling transistors MP1 and MP2 is added in the input level circuit, so that the comparator has the characteristic of working at a high-speed. The two-level comparator is applicable to system circuits of high accuracy.

The invention discloses an accurate and efficient temperature control implement method for a refrigerator. The method comprises the following steps that judgment is conducted to obtain a chamber cooling capacity requirement according to setting temperature and actually collected temperature of chambers; the motions of fans and air doors of the chambers are controlled according to the chamber cooling capacity requirement; chamber cooling capacity, rotating speeds of the fans and opening angles of the air doors are stored in a one-to-one correspondence mode. The accurate and efficient temperature control implement method has the advantages that the temperature control accuracy of the chambers and operation efficiency of a whole machine are improved; the noise generated by rotation of the fans in the cooling process is lowered. Therefore, the fresh-keeping and energy-saving effects of the refrigerator are improved.

An air-conditioning and refrigeration system using liquid metal for heat dissipation, which includes a compressor, a condenser, a dry filter, an expansion valve, an evaporator and a liquid separator that are connected in sequence through connecting pipes and form a refrigeration circuit; Refrigerant; also includes a liquid metal radiator; the radiator includes: a heat dissipation plate and a fin-type heat dissipation component directly in contact with the surface of the condenser; a first micro flow channel is arranged in the heat dissipation plate; the fin type heat dissipation group The unit is composed of a base with a second micro flow channel and heat dissipation fins on the upper and lower surfaces of the base; the first micro flow channel and the second micro flow channel are connected through a connecting pipe; the connecting pipe is equipped with a driving pump with its own power supply To drive the liquid metal to circulate in the interconnected first micro-channel, second micro-channel and connecting pipe; the present invention can significantly surpass the cooling performance of traditional air-cooling, water-cooling and phase-change cooling, etc., and the structure is simple, Easy to use, no noise, energy saving and high efficiency.

The invention discloses a portable resistive leakage current detection device of an arrester. The portable resistive leakage current detection device comprises a measurement device and a handheld receiver, wherein the measurement device and the handheld receiver are connected through wireless communication; the measurement device comprises a measurement circuit; the measurement circuit comprises a current transformer circuit, a coupling voltage phase collection circuit, a signal processing circuit, a measurement device power supply circuit, a measurement device switching circuit, a measurement device microprocessor circuit, an alarm circuit, a work indication circuit and a measurement terminal radio frequency circuit; and the input end of the current transformer circuit is connected with an upper-end current measurement line and a lower-end current measurement line separately. A phase signal of voltage of a working transmission line of the arrester is obtained by using a capacitance effect formed between a copper-clad plate and a transmission line conductor in an electric field coupling non-contact manner, so that the phase signal of the working voltage of the arrester can be obtained simply and feasibly.

The invention relates to fault tolerance single photon communication technology, and in particular to a multi-channel frequency coding technology based on single photon detection with laser light as an information carrier. Laser light undergoes frequency modulation at a transmitting end and is loaded with information. After channel transmission, the intensity of the laser light attenuates to a single photon magnitude, and the laser light is measured by a single photon detector at a receiving party, and the detected single photon pulse sequence undergoes Fourier transformation so as to extract frequency information. According to the invention, the system has very strong fault tolerance in terms of channel loss and noise. The system addresses the problem of information loss and errors that are caused by channel loss and noise in long-distance laser communication and quantum communication, and provides technical means for the realization of satellite-ground laser communication and quantum secure direct communication.

The application provides an optimizer which includes a positive branch, a negative branch, a first voltage sensor, a first capacitor, a second voltage sensor, a second capacitor, an optimizer switch,an optimizer controller, and a third current sensor or a first current sensor and a second current sensor. The application further provides a photovoltaic power generation system which includes a photovoltaic string unit, an inverter, a wake-up power supply and a wake-up switch. The photovoltaic string unit includes at least one set of photovoltaic panels and the optimizer. The application furtherprovides a photovoltaic power generation control method. The technical scheme of the application overcomes the shortcomings of the prior art: the transmission distance of weak signal communication isshort; the communication robustness is easily affected by the interference from the power transformation noise in the system and the surrounding environment noise; and the communication cost is high.A special weak signal communication module can be omitted. The communication cost of the distributed photovoltaic power generation system can be significantly reduced.

The invention provides a training method for a multi-mark learning model. The method comprises the steps that a given multi-mark data training set is used to train the multi-mark learning model whichcomprises an automatic encoder and a multi-classification model; the loss function of the multi-mark learning model is examined, and the loss function of the multi-mark learning model comprises a lossterm of the automatic encoder and a loss term of the multi-classification model; if the loss function does not satisfy a predetermined accuracy requirement, the relevant parameters of the automatic encoder and the multi-classification model are iterated; and a training classifier corresponding to the multi-classification model and the optimization weight matrix and offset vector of the automaticencoder are acquired. According to the invention, an acquired training model multi-classifies data; a large amount of unmarked data can be effectively utilized; and the classification accuracy is improved.

The invention discloses a slowdown clutch for a washing machine. The slowdown clutch comprises an input shaft, an input shaft sleeve, a brake wheel, a speed reducer, a dewatering shaft, an output shaft, a lower shell and a clutch device, wherein the speed reducer is installed in an inner cavity of the brake wheel, the dewatering shaft and the brake wheel are connected into a whole, the input shaft, the input shaft sleeve, the brake wheel and the output shaft are all connected with the speed reducer, the speed reducer is a double-planet gear train composed of a first planet gear train body and a second planet gear train body, the input shaft sleeve and a wheel carrier of the second planet gear train body are connected into a whole, and the input shaft sleeve is movably connected with the brake wheel; the clutch device comprises a positioning disc fixedly installed on the lower shell, a torque transmission shaft sleeve fixedly installed on the input shaft, a clutch disc installed on the input shaft sleeve and capable of being connected with or disconnected from the positioning disc and the torque transmission shaft sleeve, and a clutch control mechanism used for controlling the clutch disc to be connected with or disconnected from the positioning disc and the torque transmission shaft sleeve. The slowdown clutch has the advantages of being simple and compact in structure, low in manufacturing cost, safe and reliable in transmission, efficient, long in service life and low in noise.

The invention discloses an integrated storage cabinet with the flexible material distribution effect, which comprises a storage cabinet (5), a longitudinal reciprocating trolley (2), a transversal reciprocating trolley (1) and a conveyer belt, wherein L-shaped chain tracks (18) are symmetrically arranged on the inner side of a storage cabinet frame (3) and extend in the longitudinal direction of the storage cabinet, a conveyor chain belt (19) is arranged on the chain tracks, the two sides of a supporting bar (8) which is positioned at the bottom of the storage cabinet are arranged on a conveyer chain (11) of the conveyor chain belt, and a chain driving device (16) drives the conveyer chain to move the conveyor chain belt on the chain tracks; the width of the storage cabinet is 1400 mm to 5500 mm, and the storage capacity is 2 tons to 60 tons; a longitudinal guide track (6) is arranged at the top of the storage cabinet, and the longitudinal reciprocating trolley is positioned on the longitudinal guide track and makes a reciprocating motion; a transversal guide track (4) is arranged on the frame of the longitudinal reciprocating trolley, and the transversal reciprocating trolley is positioned on the transversal guide track and driven by a multipoint driving device (21) to make a reciprocating motion and selectively distribute materials in any region in the width direction of the storage cabinet; and a support roller guide track (10) is arranged at the bottom of the storage cabinet frame, a support roller component (9) is arranged at the bottom of the supporting bar and in the position corresponding to the support roller guide track, and the support roller component is assembled on the support roller guide track. The storage cabinet can distribute materials in any position in the width direction of the storage cabinet and ensure uniform distribution of materials, meets the requirements for large-formula proportional mixing of materials, has simple structure and low cost, and runs reliably.

The invention discloses a graphite-oxide composite solid lubricant for a hot-rolled seamless steel pipe and a preparation method thereof. The composite solid lubricant is mainly prepared by taking graphite, boric acid, serpentine, potassium titanate crystal whiskers and mica as main raw material and soluble silicate as adhesive agent by sufficiently stirring and mixing. The composite solid lubricant provided by the invention has high load-carrying capability, good frictional wear reduction performance and long wearing life, and overcomes the following frequently occurring problems of single-graphite solid lubricant: the vibration and noise are large, and the core rod is easy to adhere. During the application process, no noise is detected, the vibration of a rolling mill is small, the steel pipes and the core rods do not adhere, and the rod wrap accident is avoided. In addition, by using the composite solid lubricant, the steel pipe has smooth surface and is suitable for industrial production.