30results about How to "Prevent reflux" patented technology

The invention discloses a lubricating and cooling system for a die-casting machine injection punch and a lubricating and cooling method. The system comprises the injection punch, a connector, an injection rod, a cooling device, a lubricating device and a PLC (Programmable Logic Controller) arranged on the die-casting machine, wherein the injection punch is fixedly connected with the injection rod through the connector; a spiral oil suction groove is formed in the outer circumferential surface of a punch body of the injection punch; the cooling device and the lubricating device are respectively used for cooling and lubricating the injection punch; the lubricating device can be used for uniformly spraying atomized punch lubricating oil to cover the punch body and store the lubricating oil in the spiral oil suction groove; during the whole injection process, the lubricating oil in the groove can be continuously permeated into a pressure chamber, so as to guarantee supply of the lubricating oil; the cooling device is controlled by the PLC to cool and further can realize automatic cooling water recycle. The lubricating and cooling system disclosed by the invention can lubricate and cool the injection punch, ensures the clearance between the injection punch and the pressure chamber to meet the requirement, and facilitates improvement of the product quality and reduction of the enterprise production cost.

The invention belongs to the field of hydraulic control valves, in particular to a hydraulic control valve for real-time detection of flow velocity. , a detection blade is fixedly installed on the outer side of the outer rotating sleeve, the two ends of the outer rotating sleeve penetrate through the side wall of the monitoring casing and are fixedly sleeved with a bidirectional signal transmitting head, and the monitoring casing is close to the position of the outer rotating sleeve The external fixing frame is fixedly installed. By arranging ratchet teeth on the outer side of the fixed shaft, and setting meshing teeth on the inner side of the outer rotating sleeve to mesh with the ratchet teeth, the outer rotating sleeve can only rotate clockwise relative to the fixed shaft, avoiding the situation of backflow and ensuring the smooth operation of the device. At the same time, it also prevents the counterclockwise rotation of the outer rotating sleeve when driving the rotation of the two-way signal transmitting head, which leads to the detection error of the sensing head, making the linkage between the structures more reliable and accurate.

The present invention relates to a clothes processing device, comprising: a pipe, located on the upper part of the drum, the pipe forms a flow path passing through a heat exchanger arranged inside the pipe, the bottom surface of the pipe is inclined, and a fan motor is arranged on the pipe , used to move the air inside the pipe, the condensed water discharge part is located on the bottom surface of the pipe, and the condensed water generated by the air passing through the heat exchanger is accumulated in the condensed water discharge part, and the drain part is provided The lower part of the drum of the washing machine is used to discharge the condensed water accumulated in the condensed water discharge part to the outside, and the condensed water discharge pipe is connected to the condensed water discharge part and the drain part to make the The condensed water moves; the condensed water accumulated in the condensed water discharge part prevents the pressure difference generated by the driving of the fan motor from causing the fluid to flow from the drain part through the condensed water discharge pipe to the When the condensate discharge part flows backwards.

A photovoltaic inverter-based power quality optimization method for a distribution transformer area belongs to the control technology of a photovoltaic power station and relates to the field of power quality control, in particular a method for optimizing power quality by making full use of the capabilities of a photovoltaic power station. TTU obtains the output threshold and reactive compensation power factor set by the transformer in the station area, obtains the output parameters of the current transformer through AC collection, obtains the available capacity and output parameters of the current photovoltaic power station through communication with the photovoltaic power station, and obtains it through parameter comparison According to the current state of the station area, the output level of the photovoltaic power station is calculated and adjusted according to the state. By adopting the present invention, it is possible to prevent reverse flow in the station area as much as possible, and make full use of the ability of the photovoltaic power generation equipment in the station area to provide active power and reactive power compensation. The equipment is simple, and it is especially applied to medium-sized and above-sized plants that can be used as a separate power supply for a station area. In the application environment of industrial and commercial users, schools, hospitals, etc., users can be prevented from being fined by the power company.