59results about How to "Reduce production noise" patented technology

The invention discloses a process and a device for producing a (NH4)2SO4 fertilizer by using an ammonium sulfite solution. In an ammonia-process flue gas desulfurization device, by using the ammoniumsulfite solution (NH4)2SO3 produced after ammonia absorbs SO2, the outlet of a liquid inlet ejector (9) is led into the solution at the middle lower part of an oxidation tank (2) by a downcomer through a oxidization preparation process of (NH4)2SO4 fertilizer by self-absorption of air so as to increase the reaction time; and the medium is fully oxidized through the three-stage cyclic oxidation. The cyclic oxidation procedure comprises liquid at the lower part of the oxidation tank (2), a recycle pump (4), a recycle liquid ejector and the middle lower part of the oxidation tank. Air is absorbedin the liquid inlet ejector, and sheared by liquid flows and dispersed into tiny air particles, so that the contact specific area of the gas and the liquid is increased by tens of times compared withthe bubbling oxidization, thereby fully utilizing the oxygen in the air. Therefore, the process enhances the reaction efficiency, shortens the reaction times and increases the conversion rate.

The invention discloses a low-noise blanking and feeding device for automatic sorting of clamps. The device comprises a rack and a containing plate, a blanking port is formed in the middle of the device, moving push plates and retaining side plates are arranged above the containing plate and around the blanking port in two-two symmetry and jointly form a clamp feeding hopper area, and a push rod and an extensible driver connected with the same are arranged on two sides of each moving push plate respectively; a first feeding platform is arranged below the blanking port, conveying direction of the first feeding platform is perpendicular to horizontal moving direction of each moving push plate, a blanking retaining block for turning the clamps and a blanking arc plate are arranged at the feeding tail end of the first feeding platform, and the lower end of the blanking arc plate is horizontally docked with a second feeding platform. A material falling form is utilized ingeniously, so thatusing of a vibration disc is avoided, and production noise of a workshop is lowered; deadweight characteristics and gravity action of the clamps are utilized, so that convenience is brought to sequentially placing the clamps in rows, and convenience is brought to subsequent automatic processing and feeding.

The invention discloses a prefabrication combined box type underground diaphragm wall comprising prefabrication box type underground diaphragm wall components as foundation pit retaining structures. Each prefabrication box type underground diaphragm wall component comprises a box provided with a hollow part, and a web arranged in the box, wherein the vertical two ends of the box are provided withfirst tenons or first mortises, and the transverse two ends of the box are provided with second tenons or second mortises. Adjacent prefabrication box type underground diaphragm wall components are connected through mortise-tenon structures to form a combined box type underground diaphragm wall body. The invention further discloses a construction method of the prefabrication combined box type underground diaphragm wall. For the prefabrication combined box type underground diaphragm wall and the construction method thereof, the box type underground diaphragm wall components made through factory-like concentrated prefabrication are adopted for plane and vertical combined assembly of a foundation pit, any foundation pit plane forms can be formed, flexibility is achieved, prefabrication quality is high, constriction quality is stable, stress participation can be conducted in time, a large amount of labor force is saved, and cost is reduced.

The invention discloses a low self-noise stainless steel wire. The diameter of the low self-noise stainless steel wire is 5.9-6.1 mm. The low self-noise stainless steel wire comprises, by mass percentage, 0.01-0.03% of carbon, 13-17% of chromium, 4-8% of nickel, 0.1-0.12 % of copper, 0.4-0.5 % of magnesium, 1-1.2% of manganese, and the balance iron. The prepared low self-noise stainless steel wire greatly improves the abrasion resistance and corrosion resistance performance, is easy to machine and form, has certain vibration reducing performance, is low in self-noise, better solves the problems that steel wires are likely to be corroded, rusted and abraded and large in noise, and prolongs the service life.

The invention relates to a double-cone mixer which comprises a mixing cylinder, a machine frame for supporting the mixing cylinder and a mixing cylinder driving mechanism, wherein the mixing cylinder driving mechanism comprises a motor, a worm gear reducer, a rotating shaft and a bearing carrier; the motor drives the worm gear reducer to operate, the worm gear reducer is connected with the rotating shaft in a transmission mode, and the rotating shaft penetrates through the bearing carrier and drives the mixing cylinder to rotate; the double-cone mixer is also provided with a cut-off valve, an air bag, an explosion-proof electromagnetic pulse valve, an injection pipe and an air cannon stirring bracket which are contained in an air cannon unblocking device; the inside of the air cannon stirring bracket is hollow; an air outlet of the cut-off valve is connected with an air inlet of the air bag; an air outlet of the air bag is connected with an air inlet of the explosion-proof electromagnetic pulse valve; one end of the injection pipe is connected with an air outlet of the explosion-proof electromagnetic pulse valve; the other end of the injection pipe communicates with the air cannon stirring bracket; and a plurality of air holes are arranged outside the air cannon stirring bracket. The double-cone mixer implements automatic control, is convenient to operate, enhances the production efficiency, lowers the noise, prolongs the service life of the mixing cylinder and ensures the safety of operators.

The invention discloses a preparation method for a low-self-noise stainless steel wire. The diameter of the low-self-noise stainless steel wire is 5.9-6.1 mm. The low-self-noise stainless steel wire comprises, by mass, 0.01%-0.03% of carbon, 13%-17% of chrome, 4%-8% of nickel, 0.1%-0.12% of copper, 0.4%-0.5% of magnesium, 1%-1.2% of manganese and the balance iron. According to the low-self-noise stainless steel wire prepared through the preparation method, the abrasion resistance and the corrosion resistance of the stainless steel wire are greatly improved; machining and forming are easy; a certain damping performance is achieved; the self noise is low; the problems that a steel wire is prone to being corroded, rusted and abraded and large in noise are well solved; and the service life of the low-self-noise stainless steel wire is prolonged.

The invention provides a dust removing system. The dust removing system comprises a fixing plate and a plurality of dust suction assemblies arranged on the fixing plate. A plurality of sound absorbing assemblies are arranged on the dust suction assemblies. The dust suction assemblies absorb dust in various spaces of a plant. The production noise in the plant is lowered through the sound absorbing assemblies. By means of the dust removing system, absorption of the dust in various spaces of the plant can be achieved, the production noise in the plant can be effectively lowered, and cleanliness and safety of the production environment of the plant are guaranteed.

The invention discloses a servo stamping speed control method based on a jerking movement degree. The method comprises the following steps of S1, building a three-dimensional model of a component to be stamped and introducing the model into finite element analysis software; S2, setting a material parameter, a boundary condition and a contact condition, and dividing grids; S3, setting a displacement amplitude mathematical expression to be X=At3+Bt2+Ct+D, and determining an initial value range of A to be 0 to 1, the initial value range of B to be 0 to -3, the initial value range of C to be 1 to 3, and the initial value of D to be 0; S4, selecting different values within the initial value ranges of A, B and V to set different displacement amplitude curves, and submitting for computation; and S5, extracting data from computation results for comparative analysis, and determining the optimized value ranges of A, B and C. According to the method provided by the invention, the displacement, speed, acceleration jerking movement degree can be continuously adjustable, and shaping quality of the complex components and the components difficult to shape is enhanced.

The invention discloses an automatic chaining and welding all-in-one machine for antiskid chains. The design of a novel chaining and welding all-in-one machine which can complete processes of chaining and welding and overcome the defects of a traditional chaining and welding machine has become the urgent demand for development of the chain machining field in China. According to the machine, a feeding device adopts horizontal and vertical straightening, a servo motor drives a plurality of driving wheels to feed intermittently, a cutting device breaks a mouth in advance and then cuts materials, the materials are conveyed to a forming station through the feeding device, and preforming, ring sleeving and complete forming are achieved through a forming mechanism. According to the machine, the chain rolling servo motor is matched with a triangular chuck and a fixed pulley to achieve routing control of the chains, the welding with different sizes is achieved by controlling the rotation angle, and a deburring mechanism achieves that annular burrs fall off twice in a semi-annular welding scrap mode in the one-time deburring process.

A technology for forming the axle bank of train by using wedge dies to roll it by two-turns includes such steps as heating a circular blank to 1000-1200 deg.C, feeding it between two die sets with at least one pair of internal wedges and one pair of external wedges, rotating the die sets by one turn while rolling it by internal wedges, and rotating the die sets by another turn while rolling it by external wedges.

The invention relates to the technical field of papermaking, and specifically relates to a papermaking drying cylinder mechanism that comprises a machine frame; a plurality of drying cylinder assemblies installed on the machine frame; a driving assembly is in transmission connection with any drying cylinder assembly, a bearing assembly is installed on the periphery of the whole drying cylinder assembly, and a brake assembly is installed on the driving assembly, wherein the drying cylinder assemblies comprise the upper drying cylinder assembly and the lower drying cylinder assembly which are arranged in an up-down staggered mode. The upper drying cylinder assembly and the lower drying cylinder assembly each comprise a drying cylinder body, a center shaft axially penetrating through the drying cylinder body and a transmission gear installed at the front end of the center shaft. The driving assembly comprises a motor, a driving shaft fixedly connected with the output end of the motor anda driving gear fixedly connected with the other end of the driving shaft, and the driving gear is in meshing transmission with any transmission gear; the driving shaft is sleeved by the brake assembly. According to the papermaking drying cylinder mechanism, a paper web can be dried and conveyed stably, the tension of paper can be better adjusted, and the production quality of the paper is improved.

An ultrasonic servo press device comprises a machine frame (1) and is characterized in that an upper fixing plate (2) is horizontally fixed to the upper portion of an inner cavity of the machine frame(1), a plurality of guide rods (4) are vertically arranged between the upper fixing plate (2) and a lower fixing plate (3), and a sliding lifting plate (6) is movably installed on the guide rods (4);and a first ultrasonic vibration instrument (8) is installed at the bottom of an upper pressing plate (7), a pair of ultrasonic vibration instrument installation supports (28) are installed on the upper surface of a lifting lower pressing plate (9), and a second ultrasonic vibration instrument (11) is installed on the ultrasonic vibration instrument installation supports (28). The ultrasonic servo press device is compact in structure, the controllable forming operation is conducted on a workpiece through ultrasonic vibration, the accurate extrusion forming operation is achieved, a transmission structure is simplified, the maintenance cost and the operation cost are quite low, the production noise is low, and the forming quality and the forming precision of products are greatly improved.

The invention relates to the field of machining, in particular to a notching press for a U-shaped workepiece. The notching press is provided with an upper die and a lower die which are arranged longitudinally, wherein the bottom of the upper die is connected with a plurality of positioning rods and provided with a cylindrical punch; the lower die is provided with a plurality of spring sleeves matched with the positioning rods; the middle of the lower die is provided with a U-shaped female die; and two sides of the bottom of the U-shaped female die are provided with annular runners. The notching press for the U-shaped workpiece is reasonable in structural design; the notching machining accuracy is improved by the design of the positioning rods and the spring sleeves; and by the design of the annular runners, echoes generated by stamping can be effectively lowered, and production noises can be obviously lowered.

The invention discloses a photographing recognition system of a clamp assembling machine. The photographing recognition system is arranged on a conveying mechanism of the clamp assembling machine. A conveying table for conveying materials is arranged in the conveying mechanism. The photographing recognition system is arranged above the conveying table and comprises a photographing device arrangedabove the conveying table and a material removing device which is arranged above the conveying table and located below the photographing device. The photographing recognition system comprises the photographing device and the material removing device electrically connected with the photographing device. Once it is found that fastening screws on clamps are located below the clamps, the clamps are removed to return into a hopper, and finally, clamps with upward fastening screws are sequentially conveyed to the next assembling procedure. The photographing recognition system of the clamp assemblingmachine is provided and is simple in structure and more accurate and rapid in material screening.

The invention discloses a continuous automatic blanking and punching composite die and a stamping process. The continuous automatic blanking and punching composite die comprises a plurality of material pressing mechanisms and material pressing plates, each material pressing mechanism comprises a driving part, a force transmission plate and a plurality of force transmission rods; and the material pressing plates are fixed to driving ends of the driving parts through the force transmission plates and the force transmission rods. When the device is in the using process, an upper die base drives amale die to move downwards to be in contact with the upper surface of a blank in a lower die base, firstly, the driving ends of the driving parts drive the material pressing plates to carry out material pressing through the force transmission plates and the force transmission rods, then, the male die further descends to finish stamping, then the male die moves upwards to complete the stripping, then the driving parts release the material pressing, and the stamping process is completed. In the process, in the stamping and stripping process of the male die, the independent material pressing plates are arranged for material pressing, so that the problems that in the prior art, the material pressing is not stable and the quality of the stamped products is not consistent due to the fact that only the upper die base depending on self weight is used for pressing materials can be solved, the noise can be reduced, and the production efficiency is improved.

The invention provides a special steel belt production process. The special steel strip production process comprises the following steps that S1, strip steel is checked and accepted, specifically, purchased strip steel raw materials are checked, and checking and accepting are conducted after no quality problem exists; S2, chemical acid pickling is conducted, specifically, the strip steel raw material obtained after checking and accepting is put into an acid pickling tank, acid pickling is conducted through a hydrochloric acid dilute solution, and waste acid and acid mist generated by acid pickling are treated; S3, cleaning is conducted with clear water, specifically, after acid pickling is finished, residual acid liquor on the surface of the strip steel raw materials is washed away with clear water, and cleaning wastewater washed with clear water is treated; and S4, flattening is conducted, specifically, the strip steel raw materials washed with the clear water are mechanically flattened through a flattening machine. According to the special steel belt production process provided by the invention, the detailed production process of a special steel belt is systematically shown, theprocess is simple and easy to operate, meanwhile, detailed and systematic treatment is conducted on pollution sources easily generated in the process, environmental pollution is avoided, the production noise is lowered, and the production environment is optimized.