51results about How to "Fast maintenance" patented technology

The invention discloses a method for continuously preparing vanadium-nitrogen alloy. The method includes the first step of preparation, the second step of blending and blank manufacturing, the third step of adding, the fourth step of preheating and prereduction, the fifth step of carbonization and nitridation sintering, and the sixth step of discharging. A device for preparing vanadium-nitrogen alloy according to the method comprises a vertical boiler, a top feeding bin (1) and a continuous automatic discharging device (2), wherein the vertical boiler is composed of a preheating section (4), a calcination section (4) and a cooling section (5); the lower end of the vertical boiler is connected with the continuous automatic discharging device (2) through a pipeline; the tail end of the continuous automatic discharging device is connected with a finished product trolley (20) through a discharge pipe (18); the bottom of the vertical boiler is provided with a nitrogen inlet (21). The method has the advantages that the process and the device are compact, the production process is short, electric energy is saved, little investment is required, yield is high, continuous production is really achieved, and the industrialized and scale production requirement is met.

The oil-burning and electrically driven two-purpose forklift includes a frame, a power system, a gear box, a walking system, a hydraulic pump station, a hydraulic system, an operation system, an automatic control system, a cable reel, a reel oil motor and a walking oil motor. The power system includes one oil-burning engine and one AC motor; the hydraulic pump station includes one engine driven hydraulic pump station and one motor driven hydraulic pump station connected via a two-position three-way valve to the hydraulic system; the motor driven hydraulic pump station provides hydraulic oil to the reel oil motor and the walking oil motor, while the engine drives the input shaft of the gear box; and the automatic control system controls the forklift under the driving of the motor. The present invention can save fuel oil, reduce environmental pollution caused by oil burning tail gas and lower operation cost.

The invention discloses a multi-dimensional sling for a container, and relates to the field of load hanging devices. The multi-dimensional sling comprises a vehicle body, an operation chamber, a lifting device, a hanging bracket device and locking devices. The lifting device is arranged at the front portion of the vehicle body. The hanging bracket device comprises a longitudinal sliding and swinging mechanism, a transverse sliding and swinging mechanism and a bridge frame, the longitudinal sliding and swinging mechanism can drive the bridge frame to slide and swing in the longitudinal direction of the vehicle body, and the transverse sliding and swinging mechanism can drive the bridge frame to slide and swing in the transverse direction of the vehicle body. The locking devices are arrangedat the two ends of the bridge frame, by means of the locking devices, the longitudinal moving action of the container in the horizontal level can be achieved, the existing hoisting precision adjusting defect is overcome, and the hoisting efficiency is high. The lifting device is vertically arranged at the front end of the vehicle body, the operation chamber is arranged on the top of the vehicle body in a sliding manner through a view driving mechanism and can transversely move to avoid the vision shielding of the lifting device, and the usage safety of the operation chamber is good; and the multi-dimensional sling has the advantages that the design is reasonable, the number of components arranged in the multi-dimensional sling is small, and the maintenance speed is high.

The invention discloses a safe and reliable platform, which comprises a standing surface, a fixed bracket, a hoop, a limit groove and a safety belt. The surface is made of multiple steel bars crossed and fixed, and the multiple steel bars are integrally structured; there are two limiting grooves, both of which are located on the upper surface of the standing surface, and a safety belt is respectively installed on both ends of the fence , The seat belts are connected by a buckle structure. Through the above-mentioned structure, the present invention can stand on the maintenance platform to carry out the maintenance operation, the operation is more convenient and simple, and the safety factor of high-altitude operation is high.

The invention relates to a construction method for a plate ballast bed of a metro. The method comprises the steps of a basement backward paving construction step, in which a truck mixer transports concrete from a front material feeding well segment to a material storage truck to and fro via a pump or a belt conveyer in a backward moving manner, the material storage truck moves backward to an area to be paved and discharges concrete, and a paver paves; and a plate pathway conveying and paving steps, in which a back pathway and floating plates are transported to a construction area by using a flatcar, a plate paver is used for sequentially discharging the floating plates from the flatcar and paving the same to a predetermined area; and then the pathway is discharged from the flatcar and paved on the floating plates. According to the method provided by the invention, building of a temporary pathway is not needed, the damage to tunnel segments caused by the temporary pathway when the temporary pathway is supported and fixed is reduced, and the construction speed is rapid; in a tunnel, both the truck mixer and the material storage truck can move on a plane as well as a hook face for conveying the concrete, so that the concrete transportation cost is low, and the adaptability is good; the backward paving construction can be operated with subsequent construction in parallel, so that the construction efficiency is high.

The invention provides an inner and outer ball cage conjoined forging, the upper end surface of which includes the upper end surface of the outer ball cage, the upper inner wall of the outer ball cage, the upper end surface of the connecting part, the upper outer wall of the inner ball cage, the upper end surface of the inner ball cage, and the lower end surface It includes the lower end surface of the outer ball cage, the lower inner wall of the outer ball cage, the lower end face of the connecting part, and the lower outer wall of the inner ball cage; the forging also includes the central hole of the inner ball cage. The present invention also provides a forging die for manufacturing the forging. The upper die assembly of the die includes a split punch consisting of a punch ring and a punch core. The forming surface of the upper side wall of the center hole of the inner ball cage is formed; the lower die assembly includes a ejector rod and a split die consisting of the outer ring of the die, the middle ring of the die and the inner ring of the die, and the upper end of the split die forms the lower part of the forging. The end face, the forming surface of the outer side wall of the outer cage, and the upper end of the ejector rod form the lower side wall forming surface of the center hole of the inner cage. The invention makes the utilization rate of the raw material of the forging high, and makes the production cost of the inner and outer ball cages low.

The invention discloses a repair method of a transmission chain. The repair method includes the steps that 1, an inner link and a pair of outer chain plates connected with the inner link are removed;2, the removed inner link is cut along the middles of inner chain plates and ground into a round barrel, wherein the circle radius of the round barrel is the radiuses of the outer circumferences of the chain plates where the round barrel is located; 3, two half inner chain plates on the inner link left in the step 2 are taken down from a sleeve and ground into two round rings, wherein the circle radiuses of the round rings are the radiuses of the outer circumferences of the chain plates where the round rings are located; and 4, the round barrel is inserted between the pair of suspended outer chain plates, the two round rings are mounted at the two ends of the exposed inner link, then the pair of removed outer chain plates are used for fixing from the two sides through pin shafts, and chains are combined. When no accessories are available, repair can be rapidly achieved with the method, only one inner link is removed on the aspect of the length, the steps are simple, and the repair speed is high.

This application provides a maintenance method for the furnace bottom of the top-bottom combined blowing converter, blowing in low-pressure, low-flow nitrogen through the oxygen lance, replacing and discharging the heat of the furnace gas in the furnace in time, so that the small amount of slag left in the furnace can be quickly cooled After cooling and solidification, it adheres to the bottom of the furnace. After adding scrap steel or iron nuggets, the heat of the slag and the added scrap steel or iron nuggets further undergo heat exchange, which accelerates the cooling and solidification of the slag, thereby realizing rapid slag repairing of the furnace bottom and reaching the bottom of the furnace. The purpose of maintenance; this application does not require the transformation of equipment and processes, the steps are simple, practical, and low in cost. On the premise of ensuring the operation safety and maintenance effect, there is no need to invest in refractory materials such as furnace materials, and there is no longer sintering time If it is too long or too short, it will have adverse effects on furnace repair and molten steel pollution. It has the characteristics of fast maintenance, good furnace repair effect, little impact on molten steel quality, low maintenance cost, simple and practical, safe and environmentally friendly.