141results about How to "No distraction" patented technology

The invention discloses a method for improving the cooling effect of a pole winding based on a mixed-flow fan, and belongs to the technical field of cooling of high-rotating-speed and high-capacity hydraulic generators and pumped storage generator motors. Mixed-flow fans are arranged at the two ends of a magnetic yoke, and cooling air is divided into radial cooling air for cooling coils at the ends of the magnetic poles and axial cooling air entering the outer surfaces between the magnetic poles. An interelectrode outer surface ventilation cooling space is formed between every two adjacent pole windings, interelectrode ventilation partition plates which are axially arranged are arranged in the interelectrode outer surface ventilation cooling spaces, and separated axial ventilation air channels are formed by the interelectrode ventilation partition plates and the outer surfaces of the pole windings; therefore, rotor pole winding cooling of a high-rotating-speed and high-capacity hydro-generator and a pumped storage generator motor in which radial ventilation cooling cannot be adopted in a pole winding interelectrode area is ensured, and the problem that the difference between the cooling effects of the windward side and the leeward side of a traditional structure is large is solved.

A soil interface exchangeable nutrient extraction method comprises the following steps: step S01, collecting original soil samples; step S02, saturating the soil samples; step S03, heating the soil samples; step S04, extracting soil sample solutions; step S05, filtering the soil sample solutions: filtering the collected solutions and retaining them; step S06, testing the soil sample solutions on a machine: testing the solutions on a machine according to the measured indicators. The present invention collects original soil samples, supersaturates the soil samples with distilled water, and collects soil solutions at a suitable temperature. The present invention has a high degree of reduction to the actual state of the substance.

The present application discloses a method for determining the content of four active ingredients in Yanli Shuang oral dripping pills in the field of drug detection technology. A method for simultaneously detecting the content of four active ingredients, camphor, menthone, borneol and menthol in Yanli Shuang oral dripping pills, is established by using the GC-MS internal standard method. The method is accurate, simple and has good repeatability, and can be used for the quality control of Yanli Shuang oral dripping pills. The present invention also uses GC-MS to establish a fingerprint of Yanli Shuang oral dripping pills, which has the advantages of saving time and high sensitivity, and provides a scientific basis for clarifying the material basis of drug efficacy and quality control based on volatile components.

The invention provides a method for detecting related substances in a tandospirone citrate product, which adopts high performance liquid chromatography and can effectively detect the related substances in the tandospirone citrate product. The detection method provided by the invention has the advantages of no baseline interference, high separation degree, low detection limit, strong specificity, high sensitivity, and good accuracy, precision and durability. According to the invention, new compounds, namely a compound IV, Tand-3, Tand-4, Tand-5, Tand-base-4, Tand-base-6 and Tand-base-8, are also found in the invention. The compound can be used as a reference substance for content analysis and / or quality control of a product containing tandospirone citrate or tandospirone.

The invention belongs to the field of detection, and relates to an identification method for determining adulteration of twelve animal source components in edible animal viscera and products thereof based on a DNA (Deoxyribose Nucleic Acid) micro bar code technology of mitochondrial Cytb. The method comprises the following steps: deeply cleaning a sample by using a 70% ethanol solution and normal saline, mixing by combining a liquid nitrogen grinding technology and a vacuum freeze drying technology, extracting a DNA template by using an improved CTAB method, amplifying a target fragment by using a pair of designed universal primers Ctyb-A, and detecting the target fragment. Carrying out qualitative and quantitative analysis on an amplification product by utilizing a QIAxcel high-resolution capillary gel electrophoresis analysis system, and finally carrying out adulteration analysis on a sequencing result of the amplification product through an established adulteration visual model.

The invention discloses novel copper plate strip alloy composition heat treatment equipment, and relates to the technical field of copper plate strip alloy heat treatment.The novel copper plate strip alloy composition heat treatment equipment comprises a fixing frame, a heating furnace is installed on the upper surface of the fixing frame, and a feeding port and a discharging port are formed in the two ends of the heating furnace respectively; according to the equipment, copper plate strip alloy is conveyed into the heating furnace at a constant speed, it is guaranteed that the standing time of the copper plate strip alloy in the heating furnace is consistent, then the time of heat treatment on the copper plate strip alloy in the heating furnace is the same, and different positions of the copper plate strip alloy are subjected to heat treatment with the same effect; and the end, entering the heating furnace, of the copper strip alloy is always located on the same horizontal plane as the feeding port of the heating furnace, so that the copper strip alloy is prevented from being bent or twisted due to the fact that the height of the end, entering the heating furnace, of the copper strip alloy is different from that of the feeding port, and material deformation is prevented.

The invention belongs to the field of biotoxicity monitoring and ecotoxicity detection, and particularly relates to a pollutant exposure device suitable for aquatic organisms and a large-scale simulation continuous dilution method. The device comprises a cylinder body with an open top end, a buffer area, a contamination area and a water outlet area are sequentially arranged in the cylinder body, the buffer area and the contamination area as well as the contamination area and the water outlet area are separated through partition plates, holes are formed in the partition plates, the buffer area, the contamination area and the water outlet area are provided with an internal circulation system, and the internal circulation system comprises a submersible pump, a circulation water pipe and an aeration assembly. According to the method, the device is used for simulating the condition that a real water body receives sewage, dispersion and dilution of pollutants are achieved through water flow and aeration, circular flowing of the pollutants and the water body is achieved through the circulating system, and the real concentration capable of being contacted by organisms is simulated through the water inlet flow of water containing the pollutants entering the device; the method has a relatively strong application prospect in the fields of nondestructive online monitoring of sewage and wastewater, toxicity simulation of pollutants entering a large-scale water body and the like.

The invention discloses a food packaging film sealing machine, and relates to the technical field of film sealing machines, the food packaging film sealing machine comprises a film sealing rack, the top of the film sealing rack is provided with a belt conveying rack, the top of the inner side of the film sealing rack is fixedly connected with two sets of suspension brackets, and the inner side of each set of suspension bracket is rotationally connected with a fixed roller; and a packaging film is wound between the two fixed rollers. According to the food packaging box, through cooperation of parts such as the gas outlet channel, inert gas is input into the gas outlet channel from the hose and then blown out of the gas outlet of the gas outlet channel, water stains and other stains on the surface of the food packaging box are removed, and the clean surface is beneficial to tight attachment between the packaging film and the food packaging box; the purging of the inert gas ensures that no impurity interference exists in the packaging area, so that the heat sealing head can uniformly and effectively heat and press the packaging film, and the sealing performance and firmness of packaging are improved.

The invention discloses a high performance liquid chromatography detection method of a vitamin K2 intermediate. The vitamin K2 intermediate comprises a compound as shown in a formula II and / or an isomer thereof. In the formula, R0 is methyl; chromatographic conditions of the high performance liquid chromatography detection method are as follows: a chromatographic column is a C30 chromatographic column or an equivalent column thereof; a mobile phase A is an acetonitrile water solution; a mobile phase B is an acetonitrile-tetrahydrofuran-acetic acid aqueous solution; carrying out gradient elution; and the detection wavelength is 180 to 250 nm. The detection method can be used for detecting / monitoring the obtained vitamin K2 intermediate, the detected chromatographic peaks have no obvious interference, the separation degree is high, the result is accurate and reliable, the related regulations and / or requirements of accuracy and precision are met, and qualitative and / or quantitative detection of the vitamin K2 intermediate can be realized. # imgabs0 #

The invention relates to the technical field of molecular interaction analysis, in particular to a method for analyzing intermolecular interaction, which comprises the following steps of: adopting a rare earth material with ligand molecules modified on the surface as an up-conversion material, contacting the up-conversion material with target molecules in a solution system, and irradiating the solution system by using exciting light matched with the rare earth material to obtain the intermolecular interaction. The intensity of the emitted light is changed by continuously changing the intensity of the exciting light actually received by the up-conversion material in the dynamic process of continuously combining and dissociating target molecules with ligand molecules of the up-conversion material, and a molecular interaction dynamic constant can be calculated by recording a change curve of the intensity of the emitted light along with time. According to the present invention, the BLI technology has the binding rate constant (Kon), the dissociation rate constant (Koff), the affinity (KD) and the like, and the technical problems of low precision of the existing BLI technology, expensive SPR technology and the like are solved. Based on the principle, the invention also develops a series of experimental consumables, kits, sensors and analysis devices for molecular interaction analysis.

The invention relates to a device and a method for measuring the axial acceleration sensitivity of a circular tube hydrophone. The device comprises a base, a hasm, an end cover, a circular tube hydrophone to be measured, a top cover, a pre-amplifier, an accelerometer and a vibration exciter, wherein the base comprises a base plate and a semicircular pipe arranged in the center of the base plate in a protruding mode, and a plurality of installation holes of different sizes are formed in the base plate so that vibration exciters of different connectors can be installed in a matched mode; a lead groove is formed in the top of the semicircular pipe; the Hu is of a semicircular pipe structure, the pipe diameter of the Hu is matched with the semicircular pipe in the center of the base plate, and a plurality of threaded holes are formed in the middle of the inner wall of the Hu at intervals in the height direction. Through reasonable structural design, the primary hydrophone and the pre-amplification circuit are integrally designed, the axial acceleration response of the circular tube hydrophone can be compared and represented, and an important basis is provided for performance evaluation and application of the circular tube hydrophone.

The invention belongs to the technical field of bridge rotation weighing construction, and discloses a bridge horizontal rotation construction weighing auxiliary structure, which comprises at least 2n groups of weighing brackets symmetrically arranged on an upper bearing platform, n is a natural number of 2-6, and each group of weighing bracket comprises a weighing tripod, an upper anchoring assembly and a weighing jack, the weighing tripod is detachably installed on the upper bearing platform through an upper anchoring assembly, a weighing jack is arranged between the weighing tripod and the lower bearing platform, the weighing tripod is composed of a cross arm, an inclined strut and a stand column, and the upper anchoring assembly is composed of an anchoring connecting rod, a nut and a base plate. According to the weighing auxiliary structure, the problem that the height difference between the upper bearing platform and the lower bearing platform is large during weighing can be solved, the weighing jack is arranged on the outer side of the upper bearing platform, and the convenience, safety and reliability of construction can be improved. The invention further provides a weighing adjustment method for bridge horizontal rotation construction, the weighing operation construction process can be simplified, the construction efficiency is improved, the construction risk is reduced, and smooth proceeding of engineering is ensured.

The invention provides a connector, a connector assembly and a battery device, the connector comprises a connector rubber core and at least one first conductive terminal, the connector rubber core is provided with at least one first mounting hole, and the first mounting hole penetrates through two ends of the connector rubber core along the length direction of the connector. The first conductive terminal is positioned in the first mounting hole; the first conductive terminal comprises a first plugging part and a second plugging part which are positioned at two opposite ends of the first conductive terminal; the first inserting part is used for being connected with one external connecting base in an inserted mode, and the second inserting part is used for being connected with the other external connecting base in an inserted mode. The connector occupies a small space of the battery device, and the connector is convenient to maintain.

The invention relates to a light calcined magnesia shaft kiln, in particular to an electromagnetic heat radiation circulation light calcined magnesia shaft kiln which comprises a mineral aggregate conveying device, a light calcined magnesia shaft kiln body and a light calcined magnesia shaft kiln body. The shaft kiln is used for roasting the mineral aggregate and comprises a preheating zone and a roasting zone for preheating the mineral aggregate, a soaking zone for soaking the roasted light calcined magnesia powder and a cooling zone for cooling; and the tail gas treatment system is used for treating the tail gas discharged from the kiln. The mineral aggregate is roasted by electromagnetic heating (radiation), only pure carbon dioxide gas generated by decomposition of magnesite is in the furnace, the pure carbon dioxide gas can be obtained while the light calcined magnesia powder is obtained, zero emission of carbon dioxide in the magnesite light calcined magnesia process is realized, and the utilization rate of magnesite resources is 100%. Energy is saved, and the heat utilization rate is improved. And the produced carbon dioxide is subjected to catalytic hydrogenation to continuously produce methanol, so that clean and green production is realized in the process.

The utility model belongs to the technical field of locking mechanisms, and particularly relates to a circular rail butt joint locking mechanism for food vacuum freeze drying equipment, which comprises a guide rail locking end, an end with a pin hole is arranged at the rear end of the guide rail locking end, a hole site is arranged in the guide rail locking end, and a compression spring is arranged in the hole site. When the rack car walks on the circular rail butt-joint locking mechanism, the circular rail butt-joint locking mechanism is subjected to longitudinal force under the state that the locking is not released, so that the deformation of rail joints is extremely small, the interference to the walking of the rack car is avoided, the normal operation of the rack car is ensured, and the blockage is avoided; during reversing, the key is rotated to collide with the shaft sleeve, the shaft sleeve drives the compression spring to be compressed, then the spring bolt moves to be separated from the end with the pin hole, the spring bolt and the other end with the pin hole are locked, and normal reversing operation of the frame car can be guaranteed.

The invention discloses a method for identifying Xinhui pericarpium citri reticulatae and pericarpium citri reticulatae, which is characterized in that four active ingredients including hesperidin, nobiletin, tangeretin and 2-methylamino methyl benzoate are simultaneously detected through high performance liquid chromatography, and distinguishing is realized according to detection data. The method comprises the following specific steps: preparing a mixed reference solution and a test solution, extracting a test with methanol, performing ultrasonic treatment, and filtering, specific chromatographic conditions are adopted for detection, the detection wavelength of the hesperidin is 283nm, and the detection wavelengths of the other three components are 330nm. Test results show that the contents of the four active ingredients in the Xinhui pericarpium citri reticulatae are high, the content of methyl 2-methylaminobenzoate is not lower than 0.020%, the ratio of the total amount of nobiletin and tangeretin to hesperidin is not lower than 0.17, and related indexes of the pericarpium citri reticulatae are remarkably low. The method is efficient, accurate, stable and reliable, and provides technical support for standardizing market circulation, guaranteeing product quality and promoting standardized development of the Xinhui pericarpium citri reticulatae industry.

The application belongs to the technical field of microfluidics, and particularly relates to a detection substrate and a preparation method thereof and a microfluidic chip. The detection substrate is used for a microfluidic chip. The microfluidic chip comprises a driving substrate arranged opposite to the detection substrate. The detection substrate is located below the driving substrate. The detection substrate comprises a substrate, a pressure transmission structure and a detection unit. The pressure transmission structure is arranged on the substrate. The detection unit is arranged between the substrate and the pressure transmission structure and is used for generating an electrical parameter change in response to external pressure. When a liquid drop is located between the driving substrate and the detection substrate, the gravity of the liquid drop is transmitted to the detection unit through the pressure transmission structure, so that the electrical parameter change of the detection unit is caused to determine the position of the liquid drop. The application can realize accurate detection of the position of the liquid drop by causing the electrical parameter change through the gravity of the liquid drop.

The invention relates to a rapid detection method for cadmium residual quantity in aquatic products based on magnetic qualitative separation and polarized light distinguishing and quantifying. The method comprises the following steps: coupling a biotinylated cadmium monoclonal antibody through streptavidin magnetic microspheres, and specifically enriching trace cadmium in the aquatic product digestive juice to form a magnetic compound; a muller matrix microscope is used for collecting a polarization microscopic image of a compound, and a deep learning model (such as RESNET34) is combined to carry out binary classification and particle counting on the image, so that rapid and high-sensitivity quantitative detection of cadmium can be realized. The method is easy and convenient to operate, the target object magnetic separation time is within 2 min, the particle distinguishing accuracy rate is higher than 84%, the quantitative correlation Rreaches 0.9 or above, and the method is suitable for rapid monitoring of trace cadmium (several micrograms / L) in aquatic products.

The invention relates to the field of detection, in particular to a method for detecting ethanol in ambient air and waste gas. The invention provides a method for detecting ethanol in ambient air and waste gas. The method comprises the following steps: S1, solvent adsorption; s2, carrying out headspace-gas chromatography analysis; according to the method, water is creatively adopted as the adsorption liquid for adsorbing and collecting the ethanol, then the headspace-gas chromatograph is adopted for content analysis testing, the separation effect of substances of different components is good, mutual interference is avoided, the detection limit of the testing result is low, repeatability is high, and the content analysis effect is excellent.

The invention relates to the technical field of cable production quality inspection, in particular to cable stranding equipment for cable production, which comprises a turntable for driving a single-wire conductor to rotate, a stranding cylinder concentric with the turntable, and a cleaning chamber and a coating chamber positioned on the rear side of the stranding cylinder, and are respectively used for cleaning a cable and coating an insulating layer outside the cable. A low-voltage ring is arranged in a stranding cylinder, a high-voltage ring is arranged at a subsequent position, the low-voltage ring is sleeved outside a cable which is not coated with an insulating layer, the high-voltage ring is sleeved outside the cable which is coated with the insulating layer, and a galvanometer is connected between the low-voltage ring and the high-voltage ring. If the thickness of the cable insulation layer cannot reach the withstand voltage degree, or the cable insulation layer is damaged, cracked and the like. The high-voltage ring can break through the air and the insulating layer, so that the cable becomes a conductor, and the low-voltage ring and the high-voltage ring are conducted and can be detected through a galvanometer. The detection mechanism is simple and convenient, and detection is efficient and accurate.

This invention discloses a method and system for embryo quality detection, relating to the field of embryo detection technology, including the following steps: S1: fertilized embryos are continuously cultured in an in vitro culture system containing specific metabolic marker detection components, and continuous dynamic imaging of the embryos is performed to obtain a complete dynamic developmental image sequence; S2: the dynamic developmental image sequence is segmented, and temporal developmental features are captured, identifying key time points such as pronucleus appearance and disappearance, cleavage, and blastocyst formation, and generating a segmentation mask corresponding to each frame of the dynamic developmental image sequence; this invention achieves full-process time-difference imaging to capture the temporal features of embryonic development, without trauma or interference, avoiding subjective bias in static observation; by segmenting the dynamic developmental image sequence and capturing temporal developmental features, the segmentation accuracy is high and the anti-interference ability is strong.

The invention belongs to the technical field of immunoassay, and particularly relates to an immunohistochemical multicolor display method under a bright field microscope. The method comprises the following steps: developing a to-be-detected tissue sample by adopting a color combination of yellow, red, green or yellow, purple and cyan blue in sequence; the to-be-detected tissue sample comprises a tumor lymph tertiary structure, infiltrating lymphocytes, urothelium cancer cells, non-small cell lung cancer and prostatic cancer. According to the color developing method of the color combination mode, qualitative and quantitative detection of the to-be-detected tissue can be achieved. According to the staining and developing method provided by the invention, the diagnosis time is saved, the diagnosis efficiency is improved, and signals which are originally required to be displayed on three pathological sections can be concentrated on one section to be displayed at the same time.

This invention discloses a continuous-pulse column vector fiber laser cleaning system, comprising a laser generation module, a beam transmission and scanning module, and a motion control module. The laser generation module employs a continuous-pulse column vector laser, which integrates a control module capable of switching between continuous and pulsed output modes. It also integrates a polarization control system capable of freely switching between radial and angular polarization modes according to cleaning process requirements, and selecting to emit either a radially or angularly polarized beam. Within the reliable architecture of a time-sharing hybrid cleaning system, this laser cleaning system utilizes the unique spatial polarization and energy distribution characteristics of a column vector beam to replace the traditional fundamental mode Gaussian beam, achieving a significantly improved advanced laser cleaning system in terms of cleaning quality, process versatility, and overall efficiency.

This invention discloses a macroscopic negative-energy vacuum space manufacturing device and method, belonging to the field of vacuum and physics experimental equipment. The invention employs a double-layered, high-strength cavity that is initially completely fitted together to squeeze out all gas molecules. This is then simultaneously stretched and expanded by external, uniformly force-bearing claws, forming a negative-energy vacuum environment with spatial tension and no gas residue. The device includes an inner fitted cavity, force-bearing claws, a support frame, and a synchronous stretching mechanism. This invention can realize large-scale, ultra-high-purity vacuum spaces without the need for evacuation, exhibiting high stability. It can provide an ideal experimental environment for cutting-edge fundamental physics research, with a simple structure, strong scalability, and significant scientific and social value.

The utility model discloses a slender vehicle-mounted bass sound box. The sound box comprises a box body, a bass sounding unit and an echo tube, the box body comprises a top plate, side plates and a bottom plate, and a sound cavity enclosed by the top plate, the side plates and the bottom plate is formed in the box body; the top plate is provided with a first mounting hole communicated with the sound cavity, and the top plate or the side plate is provided with a second mounting hole communicated with the sound cavity; the bass sounding unit is mounted in the first mounting hole, the bass sounding unit is provided with a vibrating diaphragm, and the vibrating diaphragm limits a part of the boundary of the sound cavity; the echo tube extends into the sound cavity from the second mounting hole; the minimum distance E between the second mounting hole and the center of the diaphragm satisfies the following formula: Rd < = E < = 3.5 Rd, wherein Rd represents the radius of the diaphragm. According to the slender vehicle-mounted bass sound box, the bass strength, the diving depth and the bass purity and texture of the vehicle-mounted bass sound box are effectively improved on the premise that the volume of the sound box is kept moderate and the cost is controllable.

The application relates to a wireless control low-power power supply starting circuit, which comprises a signal receiving module, a voltage generating module, a decoding module and a load driving module, the signal receiving module is responsible for outputting low levels with different time lengths according to the length of received network information; the voltage generating module is connected with the signal receiving module and outputs corresponding voltages according to the time length of the low level output by the signal receiving module; the decoding module is responsible for generating signals to start the power supply to supply power to the load according to the voltage of the voltage generating module; and the load driving module is responsible for receiving the signals of the decoding module to start or disconnect the load power supply. Since different output pins of the decoder are adopted to control the starting and shutdown of different load power supplies, the starting of each load power supply does not interfere with the power supply to the load. In addition, since the MCU which needs to be programmed with a large program is not involved, the energy loss caused by the MCU running the program can be reduced, and the system power consumption is further reduced.

The present invention discloses an optical path system for quantitative measurement of rapid fluorescence resonance energy transfer, including an illumination optical path system and an imaging optical path system, wherein the illumination optical path system includes a light source, a collimating optical path component, a first dichroic mirror and an objective lens, wherein a light beam emitted by the light source enters the first dichroic mirror after passing through the collimating optical path component, and is divided into a reflected first light beam and a transmitted second light beam, and the first light beam is focused on the sample surface after passing through the objective lens; the imaging optical path system includes an objective lens, a first dichroic mirror, a first emission filter, a second dichroic mirror, a second emission filter, a first tube lens, a first optical path steering element, a reflection channel detector, a third emission filter, a second tube lens, a second optical path steering element and a transmission channel detector. The present invention improves the sensitivity and accuracy of FRET measurement.

This invention relates to the fields of QR code anti-counterfeiting, invisible ink printing, and anti-counterfeiting technology for commodity packaging. Specifically, it relates to a dual-layer photosensitive ink QR code anti-counterfeiting structure and anti-counterfeiting verification method. The anti-counterfeiting structure consists of three layers stacked from top to bottom: a top anti-counterfeiting QR code layer, a middle photosensitive shielding layer, and a bottom basic QR code layer. The bottom layer is directly printed on the surface of the commodity packaging substrate. The middle layer is printed with a first photosensitive ink, and the top layer is printed with a second photosensitive ink. The first and second photosensitive inks are ultraviolet photosensitive invisible inks that respond to the same specific frequency. After color development, they form a high contrast and appear transparent and invisible under natural light or ordinary visible light. The bottom layer is completely exposed for identification. Under ultraviolet light of a specific frequency, the middle layer completely shields the bottom layer, and only the top layer is fully exposed. A unique association and binding relationship is pre-established between the bottom and top layers for cross-verification using dual codes. This achieves the dual effects of convenient basic verification and high-level anti-counterfeiting verification, eliminating the vulnerabilities of traditional anti-counterfeiting methods.

The present invention discloses a head position self-calibration and self-positioning system for real person HRTF measurement, the system comprising: a real person head center calibration module, a module for calibrating the position of the head center inside the human head; a sound source spatial distribution sphere center calibration module, a module for calibrating the position of the virtual sphere center of the sound source spatial distribution in space; a self-calibration and self-positioning module, a module for the subject to calibrate and position the head center on the virtual sphere center. Also disclosed is a head position self-calibration and self-positioning method for real person HRTF measurement. By using the scheme of the present invention, the head position self-calibration and self-positioning of real person HRTF measurement can be conveniently and efficiently realized.

The utility model discloses a multifunctional food processor, and belongs to the field of household shredder. The multifunctional food material arranging device comprises a container body, a cover body, a planing assembly and a pressing and cutting assembly, the cover body is arranged on the container body, a function replacing opening is formed in the cover body, the planing assembly comprises a planing cutter set, the pressing and cutting assembly comprises a pressing and cutting cutter set and a pressing piece, and one of the planing cutter set and the pressing and cutting cutter set can be selectively installed in the function replacing opening; the cover body is further provided with a multi-purpose side hole, the planing cutter set is provided with a spring bolt capable of being connected with the multi-purpose side hole in a buckled mode, and the pressing piece is provided with a guide plate capable of being matched with an inserting piece of the multi-purpose side hole in a guiding mode. The planing assembly and the pressing and cutting assembly can be perfectly matched through the same cover body, the planing assembly and the pressing and cutting assembly are easy and convenient to disassemble, assemble and replace, different cutting modes are not interfered, and pressing and cutting operation is easy and labor-saving; in addition, the number of needed accessories is small, and manufacturing cost is low.