98results about How to "Less quantity" patented technology

The invention belongs to the technical field of organic synthesis, and particularly relates to a catalyst-free continuous production method of chlorotert-butane, which comprises the following steps: adding diluted hydrochloric acid as a starting solution into the tower kettle of a reactive distillation tower, and heating the tower kettle to boil until reflux exists at the tower top; the method comprises the following steps: adding tert-butyl alcohol and concentrated hydrochloric acid into a mixing preheater for preheating, then continuously feeding from a feed port of a reactive distillation tower until the tower top temperature is 45-48 DEG C, the side discharge port temperature is 50-52 DEG C and the tower kettle temperature is 96-105 DEG C, and carrying out reflux according to a reflux ratio of (1.5-3): 1; and continuously extracting crude chlorinated tert-butane from a side discharge port of the tower, cooling, neutralizing, drying and filtering to obtain the chlorinated tert-butane. According to the invention, through the integrated design of the mixing preheater and the reactive distillation column, especially by utilizing the reactive distillation technology to continuously remove the product, the chemical equilibrium limitation of the traditional intermittent process is successfully broken, the raw material conversion rate is obviously improved, and meanwhile, the green production targets of flow simplification, energy consumption reduction and three-waste emission reduction are realized.

The utility model discloses a cake multilayer sandwich filling mechanism which comprises a device body, the device body comprises a material extruding box, a feeding hopper, a filling nozzle and a filling device, the feeding hopper is installed at the top of the material extruding box, the filling device is installed in the material extruding box and located under the feeding hopper, and the filling nozzle is installed at the bottom of the material extruding box; the filling device comprises a first material extruding roller, a second material extruding roller and a speed reducing motor, the first material extruding roller and the second material extruding roller are distributed in an axis parallel mode, a first meshing gear is installed at one end of the first material extruding roller, a second meshing gear is installed at one end of the second material extruding roller, and the first meshing gear is meshed with the second meshing gear. According to the device, sandwich stuffing can be automatically filled into a multi-layer cake, so that the burden of workers on filling the multi-layer cake is relieved, and the cake production efficiency is improved.

This disclosure provides a wet etching system, comprising: a reaction chamber, a spray gun, a buffer tank, and a circulation pipeline. The spray gun is located inside the reaction chamber, while the buffer tank and the circulation pipeline are both located outside the reaction chamber. The circulation pipeline is connected to the spray gun. The recovery port of the reaction chamber is connected to a first buffer port of the buffer tank, and the second buffer port of the buffer tank is connected to the circulation pipeline. The recovery port is higher than the first buffer port, the first buffer port is lower than the highest point inside the buffer tank, and the second buffer port is higher than the circulation pipeline. Using this technical solution improves the atmosphere within the reaction chamber and increases product yield.

This utility model discloses a pressure-type anti-buoyancy anchor waterproof structure. A frustum-shaped water-storing buffer sleeve is fixedly installed on the outer wall of the middle part of the protective sleeve. The interior of the frustum-shaped water-storing buffer sleeve is filled with a drainage filling layer. Inclined water distribution pipes are symmetrically fixedly connected to both ends of the frustum-shaped water-storing buffer sleeve. This utility model utilizes the frustum-shaped water-storing buffer sleeve to provide a certain buffer area for groundwater to flow upward, preventing groundwater from directly seeping upward along the edge of the protective sleeve. The drainage filling layer plays a role in shaping and supporting the frustum-shaped water-storing buffer sleeve, improving its structural strength and preventing it from being squeezed and deformed underground. Water can flow inside the drainage filling layer, while the inclined water distribution pipes divert the flowing water, discharging it to the far sides of the anchor rod, allowing it to re-infiltrate into the underground soil, thus significantly reducing the amount of groundwater flowing to the surface.

The invention discloses an atomization interface design method of a vehicle adaptation layer, electronic equipment and a storage medium, and relates to the field of cabin development. The atomization interface design method comprises the steps that a one-to-one mapping relation between a globally unique service mark Key corresponding to a vehicle function attribute ID and a vehicle SOA signal or a CAN signal is established, and a HashMap global mapping table based on Key-Value key value pairs is formed; wherein the service mark Key corresponds to a unique atomization function unit and is used for representing a basic capability unit of the in-vehicle entertainment product; the HashMap global mapping table is maintained through a vehicle machine attribute ID manager CarPropertyIDManager, and the HashMap global mapping table is used for replacing a service module unit manager Manager and is used for unified management of atomization interfaces; the application layer directly indexes the service mark Key and the corresponding Value data parameters to a target atomization interface in a HashMap global mapping table by transmitting the service mark Key and the corresponding Value data parameters, and interface calling is completed; wherein the data conversion process is executed in the calling process, and the data conversion process comprises the following steps: converting standard protocol data transmitted by the APP into SOA or CAN signal data during downlink, and transmitting the SOA or CAN signal data into AutoSAR vehicle machine service.

The application discloses a reaction system with a straight-through particle collection recycling function, which comprises a reactor and a particle collector, the particle collector is located outside the reactor, and the reactor is connected with the particle collector through a pipeline; wherein the particle collector comprises a shell and a filter part arranged in the shell; the filter part is surrounded by a filter material and is used for intercepting solid substances; the upper end of the filter part is a feeding end, and the lower end of the filter part is a discharging end; a flushing part is arranged in the filter part and is used for flushing the solid substances intercepted in the filter part. The solid catalyst in the reaction system is effectively separated from the reaction system, and the separated catalyst is flushed and then put into the reaction again. In the flushing process, no liquid substance outside the reaction system needs to be additionally used.

The method for catalytically preparing D-mannose provided in the application can effectively reduce the amount of by-products glucose and fructose, and greatly improve the conversion rate of D-mannose. Specifically, the engineering bacteria expressing isoamylase gene and the engineering bacteria expressing alpha-glucan phosphorylase gene, glucose phosphomutase gene, bifunctional enzyme glucose phosphate isomerase / mannose 6-phosphate isomerase gene and mannose 6-phosphate phosphatase gene are used, starch or starch derivatives are used as substrates, phosphate buffer solution and Mg 2+ A preliminary catalytic system is constructed, and after the reaction is completed, there are unreacted substrates and maltodextrin in the reaction system, the saccharifying enzyme can hydrolyze the unreacted substrates and maltodextrin into glucose, the polyphosphate glucose kinase can convert all the glucose into phosphorylated glucose with the assistance of sodium hexametaphosphate, and then D-mannose is generated, thereby improving the yield and removing the by-products in the system.

The present application relates to the technical field of concrete pump truck, and particularly discloses an automatic adjusting method of a concrete pumping hydraulic system, which comprises an executing assembly, an oil supply assembly and an adjusting assembly. The reverse synchronous movement of a first hydraulic cylinder and a second hydraulic cylinder in the executing assembly is realized through the oil supply assembly. In this process, if the moving distances of the first piston and the second piston are synchronous, the total oil volume of the first communicating cavity composed of the small cavity of the first hydraulic cylinder and the small cavity of the second hydraulic cylinder is a constant value a. If it is found that the moving distances of the first piston and the second piston are asynchronous, the total oil volume of the first communicating cavity changes to b, then the amount of oil in the small cavity of the first hydraulic cylinder can be increased through the first adjusting assembly, or the amount of oil in the small cavity of the second hydraulic cylinder can be reduced through the second adjusting assembly, so as to make b approach a and the moving distances of the first piston and the second piston tend to be synchronous.

A wastewater purification method according to the present disclosure includes selective removal of manganese from wastewater derived from a valuable metal recovery process.

The application discloses a kind of based on nano-silver-porous silicon simultaneously SERS detection variety of mycotoxin biochip sensor and its preparation method and application, the sensor includes SERS substrate and SERS label two parts compositions, SERS substrate is by porous silicon surface magnetron sputtering on silver nanoparticles and silver nanoparticles surface connection three kinds of mycotoxin artificial antigen composition, SERS label is connected with nile blue and corresponding mycotoxin antibody gold nanoparticles.The application can be combined by each mycotoxin and porous silicon silver surface mycotoxin artificial antigen mycotoxin antibody on SERS label, by detecting the Raman signal of NBA on SERS label surface, realize three kinds of mycotoxin simultaneous quantitative analysis, detection speed is fast, sensitivity is high, while various toxins in gualou, malt and kudzu root recovery rate is all greater than 75%, the coefficient of variation of same batch is less than 5.2%, and the coefficient of variation of different batches is less than 7.8%.

The utility model relates to the technical field of non-woven fabric cleaning equipment, and particularly discloses a non-woven fabric cleaning device which comprises a box body, a cleaning cavity and a rinsing cavity are formed in the inner side of the box body, limiting structures are symmetrically arranged on the inner side of the cleaning cavity and the inner side of the rinsing cavity, and water return structures are arranged at the two ends of the upper portion of the rinsing cavity. The limiting structure comprises two L-shaped vertical plates, two sets of limiting rollers are symmetrically arranged on the sides, close to each other, of the two L-shaped vertical plates, protruding plates are arranged on the sides, away from each other, of the two L-shaped vertical plates, the water return structure comprises two mounting plates, two pressing rollers are arranged between the two mounting plates, and the two pressing rollers are arranged on the two mounting plates. According to the non-woven fabric rinsing device, residual cleaning liquid on non-woven fabric pulled out of the cleaning cavity can be squeezed out and flows back into the cleaning cavity, the amount of the cleaning liquid entering the rinsing cavity is reduced, the turbid speed of clear water in the rinsing cavity and the replacement frequency are reduced, and water resources are saved.

This invention discloses a thermal energy storage system for pumping large-flow-rate high-temperature molten salt, relating to the fields of solar thermal power generation, nuclear power, and thermal power energy storage. It includes a main molten salt storage tank, a stabilizing tank, a horizontal storage tank, a main circulating molten salt pump, and a salt-reducing temperature-regulating pump. The main molten salt storage tank is connected to the stabilizing tank via multiple pipelines. The outlet of the stabilizing tank is directly connected to the suction inlet of the main circulating molten salt pump via a pipeline equipped with an isolation valve and an air cooler, stabilizing the pump suction flow and enabling large-flow-rate molten salt pumping. The arrangement of one or more pipelines between the main molten salt storage tank and the stabilizing tank reduces the height of unusable molten salt in the main molten salt storage tank, saving costs. An air cooler is installed after the stabilizing tank to ensure safe isolation during isolation valve maintenance. This invention addresses the need for pumping large-flow-rate high-temperature molten salt in solar thermal power plants or nuclear power plants of 350MW or above, while also adapting to the requirements of long-term, uninterrupted low-speed pump operation.

This utility model discloses a feeding device for a peanut harvester, relating to the field of peanut harvesting technology. The utility model includes a drive assembly, a conveying assembly, and a receiving box. Each connecting shaft has a rotating disc fixed to both ends. Each rotating disc has a slot at its edge away from the connecting shaft. Each rotating disc's end away from the connecting shaft is rotatably connected to a mounting plate. A conveying assembly is shared on the outer sides of the four rotating discs. A transmission belt is provided around the rotating discs at the ends of the two connecting shafts in the same direction. Connecting rods are fixed at equal intervals between the two transmission belts in a path array. A receiving box is shared at the lower part between the four mounting plates. This utility model, by setting up the drive assembly, conveying assembly, and receiving box, solves the problem that soil clods and debris falling from the plants into the peanut harvester during operation affects the harvesting smoothness, and that cleaning up soil clods and debris falling during conveying is troublesome.

The utility model relates to the technical field of electrified railway application, in particular to a multifunctional anti-bird cover for an electrified railway, which comprises a first mounting sheath and a second mounting sheath which are arranged oppositely, and the sides, close to each other, of the first mounting sheath and the second mounting sheath are detachably connected. The first mounting sheath and the second mounting sheath are hollow, a mounting sheath cavity is formed between the first mounting sheath and the second mounting sheath, and one end of the first mounting sheath extends forwards to be provided with an arc-shaped cover body. According to the utility model, the structure is novel, the design is ingenious, the moving or staying frequency of birds on the umbrella skirts of the insulator chain is reduced, the amount of bird droppings on the umbrella skirts of the insulator chain is reduced, the influence of the bird droppings on the insulation performance of the insulator chain is reduced, the reliability and safety of an overhead line on an electrified railway are improved, and a certain shielding effect is achieved; and external corrosion is reduced, so that the multi-functional effect is achieved.

This invention provides a positive electrode slurry composition comprising a positive electrode active material, a positive electrode conductive material, and a positive electrode binder. The positive electrode binder comprises an aramid-based polyamide polymer containing repeating units of Formula 1 and Formula 2, and wherein the molar fraction of the repeating units of Formula 2 is 11 mol% to 30 mol% based on the total molar number of all repeating units of the aramid-based polyamide polymer. [Formula 1]-[NH-A1-NHCO-A2-CO]- In Formula 1, A1 and A2 are each independently a divalent organic group having an aromatic ring. [Formula 2]-[NH-B1-NHCO-B2-CO]- In Formula 2, B1 and B2 are each independently a divalent aliphatic organic group.

This utility model relates to the field of medical device technology, and discloses a gas supply connector, a gas supply device, and a measurement system. The gas supply connector includes an exhalation tube, a gas supply unit, an outer tube, and an inner tube. A tube-in-tube structure is formed by placing the inner tube inside the outer tube. One end of the inner tube is connected to the exhalation tube, and the other end is connected to the detection unit. One end of the outer tube is connected to the gas supply unit, and the other end is connected to a gas source. Based on this, the gas supply connector can detect the amount of gas supplied to the patient and the content of the patient's exhaled gas. Compared to the parallel arrangement of the oxygen supply tube and the collection tube in related technologies, the tube-in-tube structure design in this embodiment reduces the space occupied by the gas supply connector, as the space occupied by the inner and outer tubes is only the space occupied by the outer tube. This also avoids the situation in related technologies where the gas supply connector exerts pressure on the patient's upper lip, thereby improving the patient's comfort when using the gas supply connector.

The utility model discloses an electric steamer which comprises a base, a steamer assembly and an external water tank, the steamer assembly and the external water tank are arranged on the base, the base comprises a water storage cavity, a steam generation cavity and a heating piece arranged at the bottom of the steam generation cavity, and a separation rib is arranged between the water storage cavity and the steam generation cavity. The external water tank comprises a water supplementing cavity, a two-way water passing channel is arranged between the water storage cavity and the water supplementing cavity, and a one-way water passing channel allowing water flow to flow from the water supplementing cavity to the steam generating cavity is arranged between the water supplementing cavity and the steam generating cavity. A floater is arranged in the one-way water passing channel and floats along with the water level so as to control on-off of the one-way water passing channel. According to the electric steamer, pollutants entering the one-way water passing channel can be effectively reduced, so that the influence of the pollutants on the floating of the floater is reduced, and the service life of the floater is effectively prolonged.

The water-based epoxy color sand filling device comprises a rear vertical plate, a top plate is fixedly connected to one side of the top of the rear vertical plate, supporting columns are fixedly connected to the two corners, away from the bottom of the rear vertical plate, of the top plate, and second telescopic rods are detachably connected to the side walls, close to the top plate, of the two supporting columns. The output end of the second telescopic rod penetrates through the supporting columns to be detachably connected with a liquid receiving plate, a conveying belt is arranged between the supporting columns and the rear vertical plate, a container is placed on the conveying belt, a baffle is fixedly connected to the side wall between the two supporting columns, and the liquid receiving plate is of an L-shaped structure. The device has the advantages that the two second telescopic rods are installed and used for controlling the liquid receiving plate, the liquid receiving plate is located below the pipeline, when filling is stopped, the pipeline is lifted firstly, then the second telescopic rods are started to move the liquid receiving plate to the position below the pipeline, and therefore dripping residual liquid can fall on the liquid receiving plate; in this way, the residual liquid is intercepted and stored, so that the residual liquid does not drop on the conveying belt.

The present application relates to a kind of passion fruit explant brown prevention tissue culture medium and its tissue culture method, it is related to passion fruit tissue culture technical field.The present application provides a kind of passion fruit explant brown prevention tissue culture medium, the tissue culture medium includes the following components:MS culture medium, passion fruit juice, 6-BA, IBA, sucrose, agar.The present application is improved by culture medium, explant low-temperature treatment and explant secondary disinfection, and the pollution rate of explant, browning rate is reduced, improves the survival rate of passion fruit explant in the process of tissue culture, overcomes the shortcoming that browning mortality is high in the process of passion fruit tissue culture, improves the tissue culture efficiency of passion fruit.

The present invention provides a positive electrode for a lithium secondary battery and a lithium secondary battery comprising the same. In the positive electrode, a positive electrode additive represented by Chemical Formula 1 is contained in a positive electrode mixture layer, and control is performed on a specific X-ray diffraction (XRD) and / or extended X-ray absorption fine structure (EXAFS) peak such that cobalt remaining in the positive electrode mixture layer after initial charging to SOC 100% has a specific oxidation number, thereby improving a side reaction caused by an irreversible additive, i.e., the positive electrode additive, and reducing the amount of gas such as oxygen generated during charging / discharging. Accordingly, the lithium secondary battery has an excellent effect of improving battery safety and electrical performance.

The utility model relates to a discharging device for blade box cover production, which comprises a rack and a supporting plate rotatably supported on the rack, the supporting plate is provided with a plurality of groups of material collecting assemblies in a circumferential array along the geometric center, each material collecting assembly comprises a bearing plate, the bearing plate is provided with collecting positions, the number of the collecting positions is the same as that of blanking devices, and the collecting positions are arranged on the bearing plate. The collecting positions are used for collecting box covers placed along the discharging device, a plurality of box covers can be stacked on any collecting position, and when the number of the box covers stacked on the collecting positions reaches the maximum value, the bearing plate bears the multiple sets of material collecting assemblies to rotate along the machine frame. The blade box cover collecting device has the effect that the blade box covers obtained after production is completed can be conveniently collected.

The application relates to a button component, a discharging mechanism and a press type container. The button component comprises a button body; the button body comprises a discharging channel; the discharging channel comprises a pump body connecting section and a guide section; the guide section is internally provided with a partition plate; the first sub-channel and the second sub-channel are separated in the guide section by the partition plate; the first port of the first sub-channel and the first port of the second sub-channel are both in communication with the pump body connecting section; the second port of the first sub-channel is in communication with the discharging port in the button body; and the second end of the second sub-channel is in a closed state. The button component, the discharging mechanism and the press type container comprising the button component can reduce the number of times that the pump body is pressed by the user for discharging when the user takes the material for the first time, optimize the use experience of the user, have the advantages of simple structure, easy production, convenient user operation and effective improvement of the use experience of the user, and have wide applicability.

This utility model discloses a system for removing impurities from carbon-containing chlorosilanes and recovering chlorosilanes, comprising: a first distillation column for receiving and concentrating carbon-containing chlorosilanes; a first adsorption and reaction device connected to the first distillation column, the first adsorption and reaction device being filled with a metal adsorbent material and equipped with a silicon tetrachloride feed pipeline; a second adsorption and reaction device connected to the first adsorption and reaction device, the second adsorption and reaction device being filled with a methyldichlorosilane adsorbent material; a second distillation column connected to the second adsorption and reaction device; and a third distillation column connected to the second distillation column. This utility model can adsorb and concentrate metal impurities in carbon-containing chlorosilanes as a catalyst for the carbon removal reaction, effectively avoiding deactivation and failure caused by metal impurities encapsulating the resin catalyst, improving the conversion rate of methyldichlorosilane, and effectively avoiding the disproportionation reaction of silicon trichloride in the presence of the resin catalyst, thereby improving the carbon removal efficiency and chlorosilane recovery efficiency.

An apparatus for manufacturing a secondary battery assembly, comprising: a first hopper configured to house a plurality of unit electrode battery cells; a stacking table configured to have the plurality of unit electrode battery cells stacked thereon, thereby forming a battery cell stack; a transfer unit configured to sequentially pick up a respective one of the plurality of unit electrode battery cells in the first hopper, move it to the stacking table, and place it in a one-on-top-of-another manner; a detection unit configured to detect a relative position of a unit electrode battery cell placed on top of the battery cell stack relative to another unit electrode battery cell therebelow; and a control unit configured to determine whether the detected relative position of the top unit electrode battery cell relative to the another unit electrode battery cell is within a predetermined range, wherein the control unit is further configured to remove the top unit electrode battery cell from the battery cell stack if the detected relative position is not within the predetermined range.

This utility model relates to the field of fine chemicals, specifically providing a purification device for the condensate from a double-effect steam in a double-effect concentration process. The device includes a first-effect concentration unit and a second-effect concentration unit. The vapor phase from the lower part of the first-effect concentration unit passes through a first-effect circulating pump and a first-effect heater before returning to the first-effect concentration unit. Similarly, the vapor phase from the lower part of the second-effect concentration unit passes through a second-effect circulating pump and a second-effect heater before returning to the second-effect concentration unit. The top vapor phase from the first-effect concentration unit passes through a first-effect demister and is connected to the lower part of a distillation unit. The top vapor phase from the distillation unit is condensed by heat exchange in the second-effect heater and then connected to a gas-liquid separator. The bottom of the gas-liquid separator is connected to the upper part of the distillation unit via pipes and pumps to form a circulation loop. The gas-liquid separator also has a condensate outlet and a vapor phase outlet. This device, by adding a distillation unit, first distills the steam from the first-effect concentration process and then condenses it, saving energy and resulting in a high yield of purified liquid at a low cost.

The utility model discloses a leakage-proof tray for an environment-friendly detection kit. The kit leakage-proof tray for environment-friendly detection comprises a base plate and a containing box installed on the base plate and used for collecting and storing leaked liquid. The chassis comprises a bottom plate used for being lifted by a forklift, a plurality of vertical rods used for restraining the position of the containing box are arranged at the upper end of the bottom plate, and supporting legs are arranged at the lower ends of the vertical rods. The containing box comprises a box body, a bearing plate provided with a plurality of through holes is arranged at the upper end of the box body, conical barrels are arranged in the through holes of the bearing plate, the upper ends and the lower ends of the conical barrels are communicated, and openings in the upper ends of the conical barrels are large while openings in the lower ends of the conical barrels are small. According to the leakage-proof tray of the kit for environment-friendly detection, provided by the utility model, through the structure that the upper end opening of the conical barrel is large and the lower end opening of the conical barrel is small, a detection reagent leaked and flowing into the kit body shakes when encountering a bumpy road surface in the transportation process; and the detection reagent enters from the small opening at the lower end of the conical barrel and is splashed less.

The present application relates to a kind of natural (6S) -5-methyl tetrahydrofolate and its preparation method, wherein the natural (6S) -5-methyl tetrahydrofolate is prepared by reducing process with folic acid as raw material, and no heavy metal such as platinum or lead, and formaldehyde, benzene sulfonic acid and its ester and other raw materials are used in production process;The content of the natural (6S) -5-methyl tetrahydrofolate is not less than 98%, the amount of JK12A is not higher than 0.1%, methyl tetrahydropterin is not detected, benzene sulfonic acid and its ester are not detected, and enzyme protein residue is not higher than 1 ng / g;The present application has the advantages of convenient post-processing, green environmental protection, high product purity and the like due to the use of green biological production process.

The present application relates to wastewater treatment technical field, specifically provide a kind of methylcyclohexane diamine production waste liquid treatment equipment and process, equipment includes heat exchanger, gas-liquid separator, fluid conveying assembly and annular flow guide, heat exchanger has mutually isolated and can be mutually heat exchange first fluid passage and second fluid passage;Gas-liquid separator is located above heat exchanger.The present application by making waste liquid in the outlet direction of gas-liquid separator upward, and annular flow guide is set above the outlet of waste liquid, so waste liquid flows out upward and boils after decompression, under the flow guiding effect of annular flow guide, gas phase and liquid phase are dispersed, reduce the interaction between gas phase and liquid phase, so compared with the technical scheme of waste liquid outlet direction downward in prior art, the distance of gas phase downward movement will be shorter, so it is advantageous to improve the gas-liquid separation efficiency of waste liquid.

The stirring and heating equipment for producing the copper oxychloride nano suspending agent comprises a reaction kettle and a spiral conveyor, a feeding pipe is arranged at the bottom end of the high position of the spiral conveyor, a feeding port is formed in one side of the top of the reaction kettle, the bottom of the feeding pipe is located in the feeding port, and a baffle is fixedly connected to the outer surface of the feeding port in the top of the reaction kettle. The surface of the feeding pipe is fixedly connected with a first sealing plate, and the bottom of the first sealing plate is in contact with the top of the reaction kettle; one side of the outer surface of the reaction kettle is fixedly connected with a remixing tank; the spiral conveyor and the primary mixing tank are arranged on the two sides of the reaction kettle respectively, powder raw materials are fed through the spiral conveyor, liquid raw materials are fed through the primary mixing tank, and when workers feed materials, the operators can feed the materials at the weighing tank which is not far away from the ground and the feeding box of the spiral conveyor, so that the feeding efficiency is improved, and the labor intensity is reduced. Compared with the prior art, a workbench is not needed for feeding, so that feeding is simpler.