33results about How to "Guaranteed boost" patented technology

The embodiment of the invention provides a time-delay power supply circuit, a power supply time delay method and a boost system and relates to the field of electronics. By the embodiment of the invention, a boost chip without an enabling pin can be in a working state after a boost period of input power voltage is finished, and a boost effect of the boost chip is ensured. The time-delay power supply circuit comprises a control unit and a time-delay power supply unit, wherein the control unit comprises a first control port, and is connected with the time-delay power supply unit through the first control port and used for controlling the switch-on and switch-off of the time-delay power supply unit; the time-delay power supply unit comprises a second control port, an output port and a power input port; the second control port is connected with the first control port; the power input port is connected with a power supply; and the output port is connected with the input end of the boost chip and used for outputting the stabilized voltage of the power supply to the boost chip after the boost period of the power voltage is finished and a switch-on signal of the control unit is received. The embodiment of the invention is applicable to power supply of the boost chip.

A system for lifting an elevator shaft mold comprises a lifting frame, a combined shaft mold and a lifting device, wherein the lifting frame is a frame type operation platform which is formed by a base bearing beam, a main beam, a sub beam, an upright, a middle layer beam, a diagonal bracing, a top layer beam and a climbing ladder; through a reserved hole in a bearing beam end part connecting plate, the lifting frame is fixedly connected to an elevator shaft wall by using bearing high-strength bolts and embedded high-strength nuts which are formed on the elevator shaft wall; the combined shaft mold comprises a big steel template and an internal corner mold; through a side end vertical edge channel steel, the big steel template and the internal corner mold are fixed by using assembling bolts and reinforced by internal corner mold hook bolts to form an integral combined shaft mold; through a reserved hole in the lower part of the big steel template, the combined shaft mold is fixed on the elevator shaft wall by using a supporting lug bolt and embedded nuts which are formed on the wall; and the lifting device comprises lifting hoists and inverted hooks. During construction, the lifting hoists are mounted with the big steel template and the lifting frame as a supporting point of one another, so as to lift the lifting frame and the big steel template in sequence; and the lifting frame and the big steel template are lifted when every layer is constructed. The system for lifting the elevator shaft mold, provided by the invention, can be integrally assembled and disassembled and is convenient in construction.

The invention provides a preparation method of a niobium-nitrogen codoped zinc oxide-based photocatalytic material. The preparation method comprises the following steps of preparing 1-1000 mmol / L of niobium-zinc alcoholic solution and 0.01-0.1 mg / mL and alkali liquor, stir-mixing the niobium-zinc alcoholic solution and the alkali liquor for 30-120 minutes for hydrolytic precipitation reaction to obtain a suspension; centrifuging the suspension to collect powder, alternately washing the powder through secondary deionized water and absolute ethyl alcohol, and drying the washed powder at 50-60 DEG C in a drying oven; pre-crystallizing the dried powder at 300-550 DEG C for 0-300 minutes, and then heat-preserving the powder in ammonia atmosphere at 400-700 DEG C for 30-300 minutes to obtain theniobium-nitrogen codoped zinc oxide-based photocatalytic material. The preparation method of the niobium-nitrogen codoped zinc oxide-based photocatalytic material is simple in process, greatly reduces the operation requirements during material preparation and is applicable industrial popularization. The invention also provides the niobium-nitrogen codoped zinc oxide-based photocatalytic materialand application of the niobium-nitrogen codoped zinc oxide-based photocatalytic material.

The invention relates to the field of manufacture of methane tanks, in particular to a multiple-gear-train lifting driving system which comprises a speed reducer, a gear transmission mechanism and a plurality of chain wheels. The speed reducer drives the plurality of chain wheels through the gear transmission mechanism, and each of the chain wheels is connected with one or more lifting mechanisms through a chain correspondingly. According to the multiple-gear-train lifting driving system, the gear transmission mechanism drives a plurality of chains to drive the lifting mechanisms, the plurality of chains are utilized, lengths of the chains are shortened, accumulation errors of the chains are greatly reduced, the errors are controlled within a permissible range, synchronous lifting of assembly plates around large and middle methane tanks is ensured, labor cost is reduced, and production efficiency is ensured.

A mine main shaft protection device capable of preventing a heavy skip from downward falling comprises a shaft and the skip provided with a coaling opening and a unloading door and is characterized in that a protective box is fixed to the outer wall of the shaft, a fixed frame, a laser sensor and a control circuit board are arranged in the protective box, the laser sensor is arranged on the fixed frame, a laser transmission hole is formed in the wall of the shaft, a transmitting and receiving probe of the laser sensor is arranged in the laser transmission hole, and the coaling opening formed in the wall of the skip is used as the transmission route of a laser bundle. The mine main shaft protection device has the advantages of being suitable for any coal mine elevating electric control system which utilizes the skip, capable of accurately monitoring the true changing condition of the coal level in the skip, accurate in detection, high in safety and reliability, capable of normally working in places where much dust is produced when main shaft skip unloading is conducted, suitable for the complex electromagnetic environment on a coal mine spot, stable in motion, easy to inhaul and maintain, and capable of effectively preventing the heavy skip from downward falling, eradicating occurrence of heavy skip downward-falling accidents and guaranteeing safe elevating of a main shaft.

The invention discloses a method and device for selecting to-be-migrated network users. The method includes the steps that a to-be-processed region is divided into multiple areas according to a preset strategy; first mobile network service data generated by first mobile network users in each area is acquired; performance parameters of a second mobile network in each area are acquired; the first mobile network users with the generated first mobile network service data meeting a first preset condition are taken as first mobile network active users; for each area obtained after division, when the number of the first mobile network active users in the area exceeds a first preset value and the performance parameters of the second mobile network in the area meet a second preset condition, the first mobile network active users in the area are selected as to-be-migrated network users. According to the scheme, the selection granularity of network migration objects is greatly refined; all the migrated users can experience the advantages of the second mobile networks, and positive migration result feedback is formed.