30results about How to "The feeding process is stable" patented technology

The invention relates to a circulating fluidized bed boiler unit for high efficiency combustion of biomass and recovery of waste heat. The circulating fluidized bed boiler unit comprises a hearth, a tail flue and a secondary air distribution system and is characterized in that the tail flue is provided with three tandem parallel channels, i.e., a first tail flue, a second tail flue and a third tail flue , an inlet of the first tail flue is connected with a horizontal flue outlet of a cyclone separator, the outlet steers 180 DEG and is then connected with an inlet of the second tail flue, an outlet of the second tail flue steers 180 DEG and is then connected with an inlet of the third tail flue, a heating surface is arranged in the tail flue, a coarse-pitch tipping-tube medium-temperature superheater is arranged in the first tail flue, the secondary air distribution system is an air distribution structure with upper-lower and horizontally left-right staggered junction formed by air distribution units staggerly arranged at the lower part, the waist part and the central part of the front and rear walls of the hearth, and the air distribution structure enables multiple layers of secondary air jet to be mutually crosswise sprayed into the hearth in a height direction and a horizontal direction. The boiler unit provided by the invention has high combustion efficiency, discharges a small amount of CO, reduces fly ash content in flue gas and guarantees that main steam parameters accord with design requirements.

The invention discloses a process method for adding magnesium to magnesium-containing free-cutting steel. In the final stage of refining, after the adjustment of other components except magnesium is completed, the addition of magnesium-containing cored wire is carried out. The specific steps are as follows: 1) Production before wire feeding Condition control, controlling the slag layer, temperature and oxygen activity of molten steel; 2) feeding of magnesium-containing cored wire; 3) processing after wire feeding, wherein, the step 2) adopts intermittent wire feeding method , Feed the magnesium-containing cored wire intermittently at least 3 times, each feeding of the cored wire accounts for 1 / n of the total amount added, n is the number of times, and the interval between each part of feeding is 15-20s. The process method of the present invention has the following advantages: 1) the wire feeding process is stable without violent splashing; 2) the yield of magnesium element is high, reaching more than 15%, and the production cost is low; 3) the shape of inclusions in steel is good; 4) cutting Excellent performance. It is suitable for the production of free-cutting stainless steel and has great economic value in the field of magnesium-containing free-cutting steel.

The invention provides a directional feeding device of needle seats, and belongs to the technical field of medical accessory assembling machines. The technical problem that for an existing double-vane injection needle, assembling is completed in a manual mode, and the assembling speed is low is solved. The directional feeding device of the needle seats comprises a rack, a detection seat and a reversing seat are fixed on the rack, locating slots which can locate the needle seats are formed in the top of the detection seat, the detection seat is further provided with a detection mechanism which can detect and determine the orientations of the needle seats in the locating slots, the reversing seat is provided with rotating seats which can rotate on the reversing seat and a driving part which can drive the rotating seats to rotate, the rotating seats are each provided with a locating structure which can locate the needle seat, and the rack is further provided with a transferring mechanism which can transfer the needle seats to the rotating seats from the locating slots. According to the directional feeding device of the needle seats, it is guaranteed that the orientations of the needle seats are consistent in the feeding process of the needle seats, and the feeding process is stable and reliable.

The invention discloses a method for modifying carbides of martensitic gas valve steel. The method comprises the following steps: the raw material of martensitic gas valve steel is smelted in electric furnace, smelted in AOD furnace, refined in LF furnace, continuous casting, Rolling and pickling to obtain modified martensitic gas valve steel; wherein, the magnesium-containing cored wire is fed into the LF furnace at the end of refining, and the molten steel slag layer is maintained before feeding the magnesium-containing cored wire The temperature is 3.0-5.0, and the white slag production time is greater than 25 minutes; the weight of the molten steel slag layer is not less than 3.5% of the molten steel weight, the steel temperature is controlled at 1467-1497°C, and the oxygen activity of the molten steel is 2.2-4.8ppm. In the martensitic gas valve steel prepared by the method for modifying the carbides of the martensitic gas valve steel, the average size of the carbides therein is reduced from greater than 50 μm to less than 20 μm, effectively improving the segregation situation, and making the carbide size Has been greatly refined, segregation has been greatly improved.

A multi-functional railway transport vehicle, the upper surface of the vehicle plate is fixedly connected to the middle part of the rear side with a fixed column, the upper surface of the fixed column is rotatably connected to a rotating box, and the lower end of the rotating box is installed with a rotating structure that can control the intermittent rotation of the rotating box; The upper surface of the rotating box is fixedly connected to the motor box, the rear surface of the motor box is fixedly connected to the main box, the middle part of the front surface of the main box is slidingly connected to the slider box, the slider box is installed with a threaded rod, and the lower surface of the threaded rod is fixedly connected There is a handle box, and arc-shaped rods are installed on the front and rear sides of the lower end of the handle box. A shortened stroke structure that can make the arc-shaped rod move to the lower left or upper right is installed inside the main box; A control structure that can control the opening and closing of two arc-shaped rods and can make the two arc-shaped rods rise or fall for a certain distance during the opening and closing process; goods need to be loaded and unloaded before and after railway transportation, and the existing manual handling efficiency is poor. The present invention It can replace manual handling, saving time and effort.