78results about How to "Avoid product quality degradation" patented technology

The invention discloses a vacuum device for a double-screw extruder, which comprises the double-screw extruder (1). The double-screw extruder (1) is provided with an exhaust port (2) which is respectively connected with a first buffer tank (51) and a second buffer tank (52) through vacuum pipelines (4), the first buffer tank (51) and the second buffer tank (52) are respectively communicated with a vacuum pump (7) through the vacuum pipelines (4) arranged outside the first buffer tank and the second buffer tank, and the vacuum pipelines (4) are provided with pipeline switching valves (11). By the aid of the two buffer tanks and the pipeline switching valves which are additionally mounted on the vacuum pipelines and used for switching the two buffer tanks, quality reduction of products during cleaning of the buffer tanks is avoided. The vacuum device for the double-screw extruder has the advantages of simple structure, low manufacturing cost, evident economic benefits and suitability for popularization and use, and stability and continuity of production are guaranteed.

The invention discloses an intelligent cold accumulation insulation box circulation control system based on the Internet of Things, and relates to cold accumulation insulation boxes in the field of refrigeration equipment. In order to solve the problems that fresh food e-commerce cannot supervise logistics quality, and is relatively large in construction investment of self pick-up site, lack of fresh product delivery channels to customers, and inconvenient in delivery mode. The invention adopts a new technical scheme to solve the abovementioned problems. The technical scheme is as follows: anintelligent control device is added on a traditional insulation box; the device comprises a central control unit, a mobile communication unit, a positioning unit, a box door lock unit, a splicing lockunit, a vibration measurement unit and a deformation measurement unit, so that the insulation box has functions of supervising, alarming, recording and reporting the logistics quality. Due to the mortise and tenon joint structure of a box shell, the insulation boxes can be spliced together to form a self pick-up box, and the insulation box also can be combined with a matched express cabinet to form an insulating self pick-up cabinet, so that the investment cost of the self pick-up site is reduced, the goods delivery channel is increased, and the delivery convenience is achieved.

The invention relates to a self-cleaning polymerization reactor, which comprises a hermetic horizontal cylinder, wherein the cross section of the horizontal cylinder has a double circle shape; two main shafts are arranged in the cylinder, and are positioned in two centers of the double circles respectively; the main shafts are provided with a plurality of star rotors; each star rotor consists of a disc body and a hub in the center of the disc body; the disc body is provided with a plurality of spokes; the hub is sleeved on the main shaft; dynamic input ends of the two main shafts extend out of the horizontal cylinder, and are respectively connected with a drive device which is used for driving the two main shafts to rotate synchronously and reversely; the number of the spokes on the rotor is preferably 3; and the spokes are provided with a straight scraper or a scraper with a helical angle. When the reactor works, the spokes on the star rotors stir materials, and can continuously destroy and scrape remaining layers attached to the inner wall of the cylinder and the surfaces of the main shafts. The self-cleaning polymerization reactor is mainly used for the polymerization reaction of polylactic acid (PLA) and other polyesters.

The invention relates to polypropylene woven bag wire drawing special material. Its preparing method includes the following steps: adding calcium carbonate, special modifier, white low molecular polymer sheet and stearic acid into stirrer at normal temperature; discharging the activated inorganic filling agent from feed opening to do bagging reserve; adding the above matter, acrylic resin, white low molecular polymer sheet, BC1010 antioxidant, 168 antioxidant, calcium stearate into mixer to stir; discharging the mixed material to store in holding hopper; putting the above matter into extruder to de fusion and mixing; extruding by extruder; sending to dicer cutter through quench bath and air dryer to cut into cylindrical particle with 3*3 norms. The products have the advantages of high intensity, good processing property, low static electricity, low dust, and saving manpower, material resources, and reducing the production cost.

The invention discloses an automobile mould repair process with an excellent repair effect. The automobile mould repair process with the excellent repair effect comprises the following steps: cleaning the surface of a mould; taking a worn area of the mould as a repair area, and grinding the repair area; performing primary tempering treatment on the mould; cladding the repair area with repair alloy powder by adopting laser cladding to form a repair layer, wherein the surface of the repair layer is 0.3 to 0.5 mm lower than that surface of the mould; performing secondary tempering treatment on the mould which is subjected to laser cladding treatment; taking the worn area of the mould and the range of 2 to 5 cm on the periphery of the worn area as a strengthening area, and grinding the strengthening area of the mould; spraying strengthening alloy powder on the strengthening area of the mould by adopting plasma spraying; taking the strengthening area and the range of 1 to 2 cm on the periphery of the strengthening area as a polishing area, and performing polishing treatment on the polishing area of the mould. The repair process has the advantages that the mould is small in deformation amount and high in hardness, does not crack easily and the like; the use precision of the mould can be ensured; the service life of the mould can be prolonged.

The invention discloses a steel wire ring disassembling device for a winding machine, which comprises a ring catching device and a ring receiving device, wherein the ring receiving device comprises an upright post which can be fixed on a bottom box body rotationally; a rotation driving device is arranged at the bottom of the upright post; and the end part of the upper part of the upright post is provided with at least two receiving arms. In the steel wire ring disassembling device, the ring receiving device with the plurality of receiving arms and the control of the ring catching device are combined to realize the sequential winding of a plurality of groups of steel wire rings on one receiving arm, the steel wire rings are sequentially placed at fixed intervals, the interference among thesteel wire rings is avoided, subsequent mechanical removal of the steel wire rings is facilitated, production efficiency is improved, and decrease in product quality due to the mutual influences of the steel wire rings is avoided.

The invention discloses a convenient-to-cut plastic granule processing device. The convenient-to-cut plastic granule processing device comprises a shell, wherein the shell is of a circular tube structure; the diameter of the upper end of the shell is greater than the diameter of the lower end; a middle position of the shell is of a conical structure; a baffle plate is fixedly arranged on the upperend of the inner part of the conical structure of the shell; a through hole is formed in the middle position of the baffle plate; a rotating shaft is arranged at the inner part of the through hole ofthe baffle plate; a through hole is formed in the upper end of the shell; the upper end of the rotating shaft penetrates through the through hole formed in the upper end of the shell; the upper end of the rotating shaft is connected with an output shaft of a motor I through a coupler; the motor I is fixedly connected with the shell through a motor installation seat; pushing plates are fixedly arranged on the lower end of the rotating shaft. According to the convenient-to-cut plastic granule processing device disclosed by the invention, by adopting a mode of adding a stirring bar at the innerpart of the shell, raw materials can be fully stirred; a refrigerating pipeline is arranged at the inner part of a die, and temperature reduction can be carried out on a plastic strip, so that the plastic strip can be cooled, and cutting is convenient.

The invention provides a production apparatus and usage method of diesel vehicle exhaust treatment fluid. The apparatus comprises the following components: a bunker of high purity urea, a metering tank, an ultrapure water apparatus, a preparation kettle, a stirring and heating device, a buffer tank, an on-line quality analyzer, a membrane filtration apparatus, a product pot, a product pump, and connecting pipelines. The treatment fluid product is obtained by the following processes: metering, preparation, refining, etc. The apparatus is a set of integrated system which can be arranged in a gas station, and has the advantages of few land occupation, low investment, and flexible production; range limitation of production and sale of the diesel vehicle exhaust treatment fluid is solved, the product can be produced when the product is needed, so that the costs of production, transport and storage are reduced.

The invention relates to a freeze-dried preparation moisture control method and application thereof, and belongs to the technical field of preparation of freeze-dried preparations. The freeze-dried preparation with low impurity content and low moisture content is obtained by controlling various operation parameters of the cooling speed, the annealing temperature, the annealing frequency, the sublimation drying temperature and the sublimation drying vacuum degree in the pre-freezing process of the preparation, and the method solves the problems of high moisture content, poor stability in the storage period, short expiration date and the like of the final product of the freeze-dried preparation.

The invention discloses an oven for auto parts, which comprises a box body, a heater, an alarm device, a bracket, a wind circulation device and a control panel. Inside, the heater includes an upper heating pipe and a lower heating pipe, a temperature detector is arranged on the inner wall of the box, the wind circulation device includes a fan and an air outlet, and the wind circulation device is arranged on the inner wall of the box , the alarm device is arranged on the top of the outer wall of the box, the control panel is arranged on the top of the box, the timing module, the reset module, the temperature detection module, the alarm prompt module and the heating module are electrically connected with the single chip electromechanical, the said The bottom of the control panel is provided with a transparent observation window. The auto parts oven has simple structure, safety and power saving, greatly improves production efficiency and reduces cost.

The present invention provides a multilayered film, a method for manufacturing same, and a photovoltaic module. According to the multilayered film of the present invention, a barrier film having superior moisture barrier properties may be coated with fluoropolymer by using a primary layer including a silane-modified acrylic copolymer as a medium. Also, the multilayered film may secure interface adhesion in order to provide superior durability and weatherproofing and have superior interface adhesion with respect to a barrier film. In addition, when the multilayered film is manufactured, manufacturing costs may be reduced, productivity may be improved, and deterioration of quality due to thermal deformation or thermal shock may be prevented. Thus, the multilayered film may be, for example, effectively used for back surface sheets of various photovoltaic modules.

The invention discloses an air inlet device automatically blocking passive airflow and an air conditioner host and belongs to the field of ventilation equipment. The air inlet device automatically blocking the passive airflow comprises a frame (1) and a plurality of vanes (2) which are fixed into the frame (1), wherein the multiple vanes (2) are arranged in parallel, and the windward sides of thevanes (2) are inwards-concaved arc-shaped faces. The air conditioner host comprises a host shell (5), the host shell (5) is provided with an air inlet, and the multiple vanes (2) are arranged at the position of the air inlet. According to the air inlet device automatically blocking the passive airflow, the vanes (2) are manufactured into acceleration arc-shaped faces or V-shaped faces, the direction of wind is changed on the surfaces of the vanes and advances in an arc acceleration manner, and turbulent flow is formed between every two adjacent vanes; external cold air cannot directly blow fins without active inlet air suction force when an air conditioner is not turned on, and the defrosting speed is accelerated; and when a draught fan is started, the external air flow enters the host under the action of draught fan suction force, and therefore active air inlet is achieved. The air inlet device automatically blocking the passive airflow can be applied to all fields needing stable ventilation.

The invention discloses a spring chuck clamp, and relates to the technical field of processing clamps. The spring chuck clamp comprises a bottom plate, wherein a plurality of fixing plates are fixedlyconnected with the upper surface of the bottom plate, one side, close to the fixing plates, of the upper surface of the bottom plate, is fixedly connected with a fixing frame, two rows of motors arefixedly connected with ends, in the same direction, of the lower side and the upper side of the fixing frame, the quantity of the two rows of the motors is as same as that of the fixing plates, a fixed pipe is fixedly connected with one side, far away from the fixing frame, of each fixing plate, and a side pipe is connected with the outer side of each fixed pipe in a sliding mode. The spring chuckclamp can fix a spring chuck from the interior of the spring chuck through inner wall fixing rods, and raised directions are set on the inner fixing rods, and therefore the inner wall fixing rods areconvenient to fold. Furthermore, the inner wall fixing rods are firm in drive structure and long in use life, the outer wall of the spring chuck can be fixed through an outer wall fixator, and therefore the problems that the spring chuck slides in processing and quality reduction of the product is caused can be avoided.

The invention discloses a safety chuck device allowing wound and unwound roll materials to be conveniently stored, clamped and taken out. The safety chuck device comprises a drive end chuck and a supporting end safety chuck, and a mandrel or an expansion shaft is clamped between groove blocks at the shaft ends of the drive end chuck and the supporting end safety chuck. The safety chuck device hasthe advantages that the structure is compact, the design is reasonable, a threaded hole is formed in a clamping opening, and the length deviation of the gas expansion shaft or the mandrel can be compensated by adjusting the depth of a screw; the safety chuck device has high bearing capacity and is made of high-quality steel, and the bearing weight is greatly improved due to the special structure;the service life is long, maintenance is easy, the clamping opening is subjected to high-frequency quenching treatment, all parts can be exchanged for use, and thus maintenance is convenient; and theusage precision is high, the parts are chromeplated, blackened and quenched to achieve abrasion resistance, the parts are high in precision, high in deformation resistance and small in circular runout, irregular winding and overhigh pendulum amplitude of unwound rolls are effectively avoided, and thus the product quality can be prevented from dropping.

The invention relates to the technical field of packaging component testing, and discloses a semiconductor packaging component testing device.Fixed connecting plates are fixedly installed on the periphery of the top of a supporting base, driving motors are fixedly arranged on the two sides of each fixed connecting plate, and a connecting cover plate is movably arranged on the top of each fixed connecting plate; a first hydraulic cylinder is movably installed in the center of the top of the connecting cover plate, and a first piston rod is additionally and movably arranged in the center of the bottom of the connecting cover plate. According to the semiconductor packaging element testing device, after the additionally arranged first hydraulic cylinder is started, the testing probe tests the part of a semiconductor and ascends to a certain height, the servo motor is started to drive the rotating gear to rotate through the rotating rod, and when the rotating gear rotates, the testing plate is driven to translate through the meshed translation toothed plate. Multiple parts of a semiconductor can be conveniently tested, and the phenomenon that the product quality is reduced due to incomplete testing is prevented.

The invention provides fructus lycii jam and a making method thereof, and relates to the technical field of food. The fructus lycii jam is mainly made from fructus lycii pulp, white granulated sugar and food gum according to the mass ratio of 100:(20-30):(0.08-1.4), fructus lycii pulp is pulp obtained by smashing fresh fructus lycii or pulp obtained by mixing and smashing dry fructus lycii and water according to the mass ratio of 1:(4-6), and food gum is a mixture of pectin and xanthan gum according to the mass ratio of (0.9-1.3):(0.08-0.1). The fructus lycii jam is a new fructus lycii product, the simplex market situation of fructus lycii products is improved, the fructus lycii jam has high nutritional value, the product quality can not be easily influenced by external factors, and the fructus lycii jam is convenient to carry and store. The making method is simple in step, and industrial production can be easily achieved.

The invention discloses rubber sole outer skin pattern embossing equipment. The equipment comprises a supporting frame, a feeding guide roller, a feeding fixing roller, a pattern embossing assembly and a discharging guide roller. The supporting frame comprises supporting legs. The feeding guide roller comprises a feeding guide roller driving motor, a motor fixing support, and a guide roller body.The pattern embossing assembly comprises a pattern embossing assembly fixing block and a pattern embossing panel. The discharging guide roller comprises a discharging guide roller fixing plate. According to the equipment, the feeding fixing roller firmly presses rubber, the situation of pattern shifting caused by moving of the rubber under high pressure is avoided, the product quality is guaranteed, the enlarged supporting legs effectively support the whole equipment and are not prone to skidding, safe operation of the equipment is guaranteed, a monitoring function of a pressure gauge can makethe operation effect of the equipment known in real time, and product quality drop caused by too high or too low pressure is avoided.

The invention discloses an efficient 3D printing device based on the characteristics of a 3D printing material. The efficient 3D printing device based on the characteristics of the 3D printing material comprises a support seat and a 3D printing machine body, wherein a left-right moving slide rail is fixedly installed on the upper part of the support seat; a moving printing platform is slidably installed on the upper part of a front-rear moving slide rail; the 3D printing machine body is fixedly installed at one side of a lifting frame; a printing nozzle is formed in the lower end of a fixed pipe; a transparent box body is fixedly connected to the upper part of the moving printing platform; an elastic rubber film is arranged on the upper part of the transparent box body; the upper part of the elastic rubber film fixedly sleeves the fixed pipe; an oil conveying pipe used for conveying antirust oil and a gas conveying pipe used for conveying nitrogen gas are communicated to one side of the oil conveying pipe; an atomizing nozzle is communicated to one end of the oil conveying pipe; and one end of a ventilation pipe communicates with the upper part of an electric melting furnace. During use, the device is capable of isolating the influence of oxygen gas in air in a printing process, so that the overall quality of the product is improved.

The invention discloses a method for preparing magnetic graphene oxide by using an NH3.H2O-NH4NO3 solution. The method comprises the following steps: preparing a graphene oxide solution, mixing the graphene oxide solution, an iron salt solution and the NH3.H2O-NH4NO3 solution, heating the obtained solution to 50-70 DEG C, and heating the solution to 70-90 DEG C under an ultrasonic condition to prepare the magnetic graphene oxide. The method has the remarkable advantages of stabilization of the production process through effectively combining ultrasonic treatment with the NH3.H2O-NH4NO3 solution, simplicity in operation, and production of the magnetic graphene oxide having superior performances.

The invention discloses a thread winding structure for a textile thread and relates to the technical field of textile. The thread winding structure for the textile thread comprises a shell; a controller is inset on the right side of the shell; a motor is fixedly connected to the bottom of an inner cavity of the shell; an output shaft of the motor is fixedly connected with a device body; the controller is electrically connected with the motor; the device body comprises a rotating disk; the bottom of the rotating disk is fixedly connected with the output shaft of the motor; a coil block is inset on the top of the rotating disk; a winding device is fixedly connected to the top of the coil block; the surface of the winding device is sleeved with a coil ring; and the controller is electrically connected with the coil block and the coil ring. According to the thread winding structure for the textile thread, due to the improvement of the device body and the winding device, the automation degree of the thread winding structure is enhanced, fixing operation and taking-out operation are not needed to be performed manually, and it is avoided that because of the manual operation mistake, the product quality is lowered.

The invention discloses a fermentation production method of a feed probiotic preparation which is mainly used for producing cellulose. The liquid-state fermentation production method comprises the steps of with a liquid-state fermentation process, carrying out mixed flora combined fermentation by bacillus and brewer yeast to produce the feed probiotic preparation, and adding auxiliary materials and drying in the later period of fermentation. The feed probiotic preparation prepared by the method is provided with high-activity cellulase, and is endowed with activity of various digestive enzymes, the two functions of a feed cellulose preparation and a probiotic preparation are combined, environmental pollution is avoided, and the cost for subsequent recovery and purification of enzymic preparations is lowered; the efficiency is high, the palatability of animals for a feed product is improved, the absorption of animals for the nutrition of the feed is promoted, large-scale production and popularization are promoted, and a function of effectively promoting the healthful breeding in the livestock and poultry industry is achieved.

The invention provides a preparation device and preparation method of golden chrysanthemum flavored sunflower seeds. The device comprises a first screening box, the top of the first screening box is fixedly connected with a connecting bin, the top of the connecting bin communicates with and is provided with a second screening box, the top of the second screening box communicates with a feeding bin, and the front face of the second screening box is provided with a slag discharging opening. Empty shells and defective products on a coarse screen can be blown off through an air blower installed on the inner side of an air bellow, the empty shells and the defective products are discharged out of the machine from a peeling opening, product quality reduction is avoided, meanwhile, the slag discharging opening matches the air bellow, and unqualified sunflower seeds can be conveniently discharged from the slag discharging opening; a fine screening net is installed on the inner side of a second screening plate in a fine screening mechanism installed on the inner side of the first screening box, the fine screening net is used for filtering out small-particle sunflower seeds, a discharging opening formed in the front face of the first screening box facilitates discharging of qualified sunflower seeds, and a residue filtering net installed at the bottom of the first screening box is used for collecting the small-particle sunflower seeds, so that impurities are prevented from being accumulated on the ground and polluting the working environment.

The invention discloses a cutter abrasion detection and sawdust cleaning device based on a woodworking carving machine. The cutter abrasion detection and sawdust cleaning device comprises a working box, and a working chamber with a rightward opening is formed in the working box. According to the cutter abrasion detection and sawdust cleaning device, a cutting device is used for continuously cutting a cutting block during each cutter working return stroke of a woodworking carving machine; a composite device is used for detecting vibration generated by the cutting block when the cutting block iscut by a cutter each time to quantify the abrasion degree of the cutter, and making a sound to remind a user to replace the cutter when the abrasion degree of the cutter is large; sawdust generated by cutting is sucked, extruded and compressed through a cleaning device; and power is transmitted to operation of the whole device through a power device. Thus, product quality reduction caused by thelarge abrasion degree of the cutter is prevented, and the production efficiency and the production quality are improved.

The invention is suitable for the technical field of industrial detection, and provides a clamp state detection method and device, a terminal and a storage medium. The fixture state detection method specifically comprises the following steps: acquiring fixture state data of a to-be-detected fixture, environment data of an environment where the to-be-detected fixture is located, and machine tool equipment data of a machine tool provided with the to-be-detected fixture; fusing the fixture state data and the environment data to obtain target fusion data of the to-be-tested fixture; inputting the target fusion data into a state monitoring model associated with the machine tool equipment data to obtain an abnormal score of the target fusion data output by the state monitoring model; and if the abnormal score is greater than a preset score threshold, determining that the clamp state of the to-be-tested clamp is an abnormal state. According to the embodiment of the invention, the state of the clamp can be detected, whether the clamp is in an abnormal state or not is judged, and the problem of product quality reduction caused by clamp abnormity is avoided.

The invention relates to an aerated concrete waste comprehensive utilization method and system. The system and the method are characterized in that the system comprises a double-shaft metal crusher, aring hammer European style crusher, a transition bin and a pouring stirrer; waste is crushed through the double-shaft metal crusher and the ring hammer European style crusher to allow the diameter ofthe waste to range from 0.2 mm to 1 mm; the crushed waste is conveyed into the transition bin of a pouring building through a pneumatic conveyor to be temporarily stored; in the next aerated concreteplate or building block production process, the waste is used as aggregate to be doped into an aerated concrete mixture composed of sand, fly ash, silicon-containing tailings, lime, cement, a foamingagent and water, the mixture is stirred in the pouring stirrer, and the mass of the waste accounts for 3%-8% of the mass of the aerated concrete mixture. The aerated concrete waste can be treated, and the occupied area and pollution of the waste are reduced; the waste is doped into concrete for subsequent production as aggregate, so that the consumption of lime and cement is reduced; waste treatment energy consumption is low, and the cost is saved.

The invention provides a beam current baffle plate controlling system, which is used for controlling an under-beam irradiation device in a protective wall to homogenize the dose of irradiated products and prevent point over-radiation. The beam current baffle plate controlling system comprises an electric control component, a pneumatic mechanical transmission component and a baffle plate; and the electric control component is positioned outside the protective wall. According to the baffle plate controlling system, electronic elements and copper parts in the electric control component are prevented from being split, cracked or rusted by high radiation and high ozone concentration by changing the position of the electric control component, and decline of the quality of the products due to damage of the electric component is prevented; and easily oxidized parts such as connecting pipes and the like in the pneumatic mechanical transmission component are prevented from being cracked to leak air due to corrosion or pipelines are prevented from being plugged due to corrosion by changing the material for the pneumatic mechanical transmission component, and the production quality and the stability of the irradiated products are ensured.

The invention relates to peony flower flavored sunflower seed preparation equipment and preparation method thereof, the preparation equipment comprises a screening box, the bottom of the screening box is fixedly connected with a fixing frame, the bottom of the fixing frame is fixedly provided with a soaking barrel, and the bottom of the soaking barrel communicates with a connecting pipe. A barrel connecting pipe at the bottom of the soaking barrel communicates with the drying box, a residue filtering net installed on the inner side of the connecting pipe can further filter impurities in sunflower seeds, drying holes are formed in the side face of a drying bin installed on the inner side of the drying box, and an air heater located on the side face of the drying box is installed above the drying holes. The air heater can provide uniform hot air for sunflower seed drying, stirring plates mounted on the side faces of the bottom ends of the linkage rods are arranged on the inner side of the drying bin, the stirring plates can stir the soaked sunflower seeds, the sunflower seeds in the drying bin can make full contact with the hot air in the drying holes, and therefore rapid drying can be achieved; the equipment adopts an integrated structure of screening, soaking and drying, so that the enterprise cost is greatly saved, and manpower and material resources are saved.

The invention provides a preparation method of a modified starch adhesive. The preparation method comprises the following steps: sequentially adding water, starch, a polyvinyl alcohol solution, a cross-linking agent, hydrogen peroxide and ferrous sulfate powder into a jet loop reactor through a first feed port, and starting an external circulating pump to perform high-speed jet mixing; and slowlyadding methane chloride gas and an alkali liquor into the reactor through a second feed port and the first feed port for several times respectively for mixing and full reacting, continuously reactingfor 1-2 h in the jet loop reactor after the feeding is finished, and finishing the reaction, wherein the feeding period is 1-2 h. The jet loop reactor based on the Venturi effect is adopted, the masstransfer rate of the jet loop reactor is greatly increased, due to the fact that a Venturi nozzle is used, strong suction force is generated by local high vacuum in the using process, gas-phase reaction materials can be automatically sucked in, and sufficient mixing and complete reaction are facilitated; and the methane chloride gas and the alkali liquor are slowly added by several times, so thatthe product quality reduction caused by excessive alkalinity and massive side reactions is avoided.

The invention provides production equipment and method for rapid-hardening and non-shrinkage concrete. The equipment comprises a mixing device; the mixing device comprises a mixing box, a feeding assembly, a first weighing assembly and a second weighing assembly; the feeding assembly comprises a receiving hopper; a filter net is mounted in the receiving hopper; gravel having the diameters rangingfrom 5 mm to 10 mm can penetrate through a net body; a discharging cover communicating with a first discharging hole is mounted on the outer wall of the receiving hopper; the bottom end of the discharging cover communicates with the top end of a main pipe; the bottom end of the main pipe communicates with a first branch pipe and a second branch pipe which communicate with an outer-wall receiving device; and a switching valve is arranged at the joint of the main pipe, the first branch pipe and the second branch pipe. By the aid of the equipment and the method, the problem of relatively poor quality of rapid-hardening and non-shrinkage concrete products due to the fact that gravel having the diameters ranging from 5 mm to 10 mm and gravel having the diameters ranging from 12 mm to 20 mm cannot be identified automatically and allocation weight is wrong in the prior art is solved.