30results about How to "Reduce runaway" patented technology

The invention discloses a frequency hopping communication method for a model airplane. Communication points are divided into the static communication points and dynamic communication points, and the two kinds of communication points are combined to form a frequency hopping meter with the high interrupting reconnection function and the high anti-jamming performance. Effective and rapid synchronization is achieved through the static communication points, the environmental electromagnetic interference is shunned through the dynamic communication points, and therefore control failures of the model airplane in the complex electromagnetic environment can be reduced.

The invention discloses a lateral suction range hood. The lateral suction range hood comprises a hood (1) and a movable smoke guide plate (2); the hood (1) is provided with a smoke inlet (10); the movable smoke guide plate (2) is switched between opening and closing states, and comprises multiple plates bodies (20, 21, 22); when the movable smoke guide plate (2) is located in the closing state, all the plate bodies (20, 21, 22) are arranged in a first direction (X) in sequence, and two adjacent plate bodies (20, 21, 22) in the first direction (X) are rotationally connected; and a rotating center line (O) of each plate body (20, 21, 22) is parallel to a second direction (Y). When the movable smoke guide plate (2) is located in the opening state, the movable smoke guide plate (2) is folded with the rotating center line of at least one plate body as a folding line, so that the extension length of the movable smoke guide plate is reduced.

The invention discloses an engine pressure balance system, which relates to the field of direct injection engines in gasoline cylinders. It includes air filter, air pump, air storage tank, solenoid valve, engine and sealed control cylinder, the air filter, air pump and air storage tank are connected in sequence; the air storage tank is connected with the third port of the solenoid valve; the solenoid valve The first port and the second port are respectively connected with the crankcase cavity and the intake pipe; the control cylinder is equipped with a control piston and a piston rod connected to it; the control piston seals the cylinder cavity on both sides; the left cavity of the control cylinder passes through The first conduit communicates with the inner cavity of the crankcase; the right cavity of the control cylinder communicates with the inner cavity of the cylinder on the upper side of the piston through the second conduit and the air passage; the two side walls of the control piston are elastically connected with the respective adjacent end cylinder walls through springs; the piston The distance between the left end of the rod and the two elastic contacts is 1mm. The invention can reduce the pressure difference between the upper side and the lower side of the piston in the cylinder, thereby reducing the phenomenon of gasoline running down and improving the lubricating stability of the engine oil.

The invention relates to a fluidized bed reactor and a method for methanation of gas mixture containing H2 and CO. The fluidized bed reactor of the invention comprises a material gas inlet 1, a catalyst outlet 2, a gas-solid separator 5, a product gas outlet 6, a catalyst inlet 7 and a material gas lateral line inlet, wherein one or more gas distribution plate 3 is arranged in the fluidized bed reactor in order to divide the reactor into several fluidized bed layers to form several catalyst dense-phase zones; a cooling water spraying device 4 is arranged above each layer of the catalyst dense-phase zone in order to control temperature of the reactor. Because the circulating cooling water directly contacts high-temperature product gas, the reactor of the invention strengthens heat transfer, is easy to control reaction temperature, reduces heat loss during the heat transfer and improves heat utilization rate during the reaction. The reactor has the advantages of large production flux, big operation elasticity, high CO conversion rate, high selectivity of produced methane, less catalyst dosage, high utilization rate of heat quantity and so on, so that the reactor has good industrial application prospect.

The invention provides a method and device for controlling the carbon content of high-nickel alloy cast iron. The method comprises the steps that the smelting temperature and heat preservation power of the high-nickel alloy cast iron are determined; the decarbonization curve of the corresponding carbon content of the high-nickel alloy cast iron is determined according to the smelting temperature and the heat preservation power; the initial carbon content value of the high-nickel alloy cast iron at a full-furnace state is determined through detection; the corresponding relation table of a corresponding carbon content supplementing value and time is determined according to a preset target carbon content value, the initial carbon content value and the decarbonization curve; and in the smelting heat preservation process of the high-nickel alloy cast iron, a carburant is added to a smelting furnace according to the corresponding relation table of the carbon content supplementing value and the time. According to the technical scheme, the continuous stability of the carbon content in the smelting heat preservation process of the high-nickel alloy cast iron is effectively guaranteed, the phenomenon that the carbon content of the high-nickel alloy cast iron is out of control is effectively reduced, and the product quality is guaranteed.

The invention discloses a methanol-to-propylene device, which comprises a first reactor, a first feed pipe, a second feed pipe, a third feed pipe, a cooling unit, a dimethyl ether separation tower, a heating furnace, The second reactor, separation unit, C4 rectifying tower, circulating hydrocarbon pipeline and steam pipeline; the present invention also discloses the corresponding methanol-to-propylene method; the present invention separates isobutane from circulating hydrocarbon and carries out the first reactor The first product stream obtained from the reaction of methanol to dimethyl ether is divided into three streams. The dispersed feed with different temperatures helps to reduce the phenomenon of reactor overheating. At the same time, by adjusting the gas-liquid ratio of the feed from the side line, it helps Efficient temperature control of the reactor.