7results about How to "Avoid knocking" patented technology

The present application belongs to the field of metallurgy, and particularly relates to a method for stopping blast furnace and lowering material surface, comprising the following contents: (1) adjusting the furnace operation before stopping; (2) adjusting the stopping material and optimizing the material distribution matrix; (3) pre-turbine, replacing the tuyere small sleeve and controlling the furnace top temperature; (4) stopping and lowering the material surface: 1. increasing the ratio of top pressure and hot blast pressure: the ratio of top pressure and hot blast pressure is increased to 0.68-0.75; 2. taking different degrees of control on the top temperature when the material surface is at different positions of the blast furnace: (1) when the material surface is above 1 / 2 of the bosh, the top temperature is controlled at 320-350 DEG C; (2) when the material surface is below 1 / 2 of the bosh, the top temperature is controlled at 280-300 DEG C; 3. spraying coal powder, oxygen enrichment, increasing and continuously maintaining the nitrogen gas injection of the tuyere after stopping the coal injection; 4. controlling the gas composition; 5. controlling the [Si] of the molten iron. The method can avoid the blast furnace explosion in the process of stopping and lowering the material surface, prolong the coal gas recovery time, shorten the time of stopping and lowering the material surface, save the coke consumption and reduce the cost.

This invention discloses an anti-knock control method, control device, and vehicle applied to an engine in a hybrid power system. The control method includes: adjusting the engine's initial demand torque change rate limit, initial torque limit, and initial speed limit to a first demand torque change rate limit, a first torque limit, and a first speed limit, respectively; acquiring the engine's knock intensity signal and knock thrust angle under normal operating conditions; determining the engine's knock risk based on the knock intensity signal and knock thrust angle; and correcting the first demand torque change rate limit, the first torque limit, and the first speed limit based on the knock risk. The anti-knock control method provided by this invention can adjust the engine's parameter usage limits in real time, using the engine to operate to the maximum extent possible and to prevent the risk of engine knock, thereby improving engine efficiency and economy.

This utility model discloses a tungsten carbide boring tool, including a tool head and a quick-release mechanism. The quick-release mechanism includes an insertion rod and a quick-release sleeve. The insertion rod is fixed to the top of the tool head and inserted into the quick-release sleeve. A groove is formed on the outer wall of the insertion rod. A sliding rod is slidably provided on the outer wall of the quick-release sleeve. Multiple sets of sliding rods are provided, each with a locking block fixed at its bottom. A push block is fixedly provided at the top of each set of sliding rods. A limiting sleeve is slidably provided on the outer wall of the quick-release sleeve. By forming a groove on the outer wall of the insertion rod and cooperating with the sliding locking block on the outer wall of the quick-release sleeve, a quick locking function is achieved. At the same time, the use of polygonal positioning holes and positioning rods ensures accurate positioning and anti-rotation of the tool head installation. This structural design completely changes the traditional boring tool fixing method that relies on complex threaded connections or wedge-shaped grooves. The operator can complete the installation of the tool head with only simple insertion and rotation actions, without the need for special tools, which greatly reduces the assembly difficulty and time required.

The application discloses a cell culture shaking device convenient to adjust, and relates to the technical field of cell culture.The cell culture shaking device convenient to adjust comprises a shaking plate, the shaking plate is obliquely arranged in a shell, a plurality of holes are formed in the surface of the shaking plate, a limiting assembly is fixedly connected to the inner side surface of the shaking plate, a driving assembly is fixedly connected to the bottom of the inner side surface of the shell, the side of the driving assembly close to an end cover is in surface spline connection with the limiting assembly, and a clamping assembly is fixedly connected to the inner wall of the hole of the shaking plate.Because the shaking plate is obliquely arranged, the culture bottle not only generates horizontal circular motion in the rotating process, but also generates up-down displacement along the inclined surface of the shaking plate.In the process of revolving around the driving assembly once, the culture bottle will experience a complete rising and falling process, three-dimensional composite oscillation effect is formed, the culture medium and the culture bottle generate complex relative movement, cell and nutrient substance contact can be more efficiently promoted, and gas exchange efficiency is enhanced.

The present invention relates to the technical field of reduced iron powder processing, and specifically to a dust removal structure for magnetic separation treatment of reduced iron powder, including: a dust removal box, a second guiding plate is fixedly connected inside the dust removal box, and a sealing extension mechanism and a filtering mechanism are arranged on one side of the dust removal box. Through the setting of the screening magnetic separation mechanism, the linkage effect of the first transmission belt and the second transmission belt drives the magnetic rollers on the five third rotating shafts to rotate synchronously. The multiple groups of magnetic rollers cooperate with the screening plate to achieve multi-level magnetic separation of iron powder, and can accurately adsorb the magnetic iron powder in the mixed dust. The connecting rod fixed by the fixed shaft drives the scraper to closely adhere to the surface of the magnetic roller, and can clean the iron powder adsorbed by the magnetic roller in real time, avoiding the accumulation of iron powder from affecting the magnetic separation effect. The cleaned iron powder is centrally recovered through the iron powder blanking plate, and the separated dust is discharged through the second guiding plate to the dust discharge plate, realizing the efficient diversion of iron powder and dust.

The utility model relates to welding technical field, concretely is a kind of welding device for circuit board production, including base, support column, welding machine, the upper surface of base is equipped with fixing device, the fixing device includes bottom plate, the bottom plate is fixedly connected with base, the both sides of bottom plate are all set up with sliding slot, the inner wall sliding connection of two sliding slots has sliding plate, the upper surface of sliding plate is set up with two rectangular grooves, the inner wall sliding connection of two rectangular grooves has slider, the upper surface of slider is fixedly connected with bracing plate, the upper surface of bracing plate is rotatably connected with screw rod, the upper surface of bracing plate is fixedly connected with limit rod, the arc surface sliding connection of limit rod has pressing plate.The utility model, when facing different size width's circuit board, has solved the circuit board welding of existing, needs to replace fixture constantly and fixes, greatly reduce the efficiency of welding, improve the problem of manpower cost.

The application discloses a safety protection device and method for highway construction, which comprises a protection frame, a first protection plate fixedly arranged on the right side of the protection frame, an air bag fixedly arranged on the right side of the first protection plate, a silica gel buffer pad fixedly arranged in the air bag, a plurality of mounting plates arranged in the air bag, a plurality of connecting screws for connecting the mounting plates with the first protection plate, a collapse box fixedly arranged on the right side of the mounting plate, a guide column fixedly arranged on the right side in the collapse box, and the right end of the guide column connected with the silica gel buffer pad. The protection frame, the protection plate, the air bag and the collapse box are arranged, which can effectively prevent vehicles from accidentally hitting the construction area, and on the other hand, the air bag and the silica gel buffer pad can effectively protect the vehicles, prevent the casualties in the vehicles, and when the device is hit, the gas in the gas cylinder is sprayed backward to form a reaction force, which can offset a part of the impact force of the vehicle and prevent the device from being hit open by the vehicle.