Weifang Shouguang is a well-known vegetable country in China. Both the scale and output value of the local greenhouse vegetable crop are at the top. With the adjustment of the agricultural structure, agricultural production and management have gradually become specialized, standardized, standardized and intensified. Therefore, in order to comply with the development of modern agriculture, the local vegetable planting industry is also quietly changing. Technology instruments such as greenhouse stewards in greenhouses are becoming more and more common. By promoting the application of Internet of Things technology in agriculture, helping local farmers achieve Specialized and precise agricultural production management, with the help of information technology, helps transform traditional agriculture into modern agriculture. Globe valve, also known as cut-off valve, is a mandatory sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction force between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve should be large, otherwise the failure of the top of the valve stem will occur. According to the connection method, it is divided into three types: flange connection, thread connection and welding connection. After the appearance of the self-sealing valve, the medium flow direction of the globe valve is changed from the top of the valve disc into the valve cavity. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be adjusted accordingly. decrease. At the same time, under the action of the medium, this form of valve is also tighter. my country's valve "Three Chemicals" once stipulated that the flow direction of the globe valve should be from top to bottom. When the globe valve is opened, the opening height of the valve disc is 25% to 30% of the nominal diameter. The flow rate has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the globe valve should be determined by the stroke of the valve disc. Shut-Off Valve,Shutoff Valve,Automatic Shut Off Valve,Auto Shut Off Valve Jiangsu Qiantu Trading Co., Ltd. , https://www.jsqiantupump.com
Greenhouse steward is an environmental detection instrument used in the development of modern smart greenhouses. It is small and full-featured. It can use it to collect real-time air temperature and humidity, soil temperature, wind speed, and other data in greenhouses. Changes in the environment and the timely adjustment of important indicators such as temperature, humidity, and illuminance in the greenhouse can result in a moderate crop in the best growing environment and create a higher output value for vegetable cultivation. Then for users, what is the feeling of using a greenhouse steward in a greenhouse?
In the past, managing greenhouses, watering, and fertilizing all depended on experience and feelings. There is no basis for this. Now that there is a housekeeper, the humidity in the greenhouse is a few percent. How much is the temperature and how much is the soil moisture content? Such as, can be detected in real time, so when it should be watering, when the need for ventilation, the user can be aware of, and with these precise data guidance can be truly implemented on-demand supply to maintain the precise temperature in the greenhouse The environment of humidity, light, and carbon dioxide concentration has enabled rational and scientific planting. The busy work has become simple and easy. This has not only saved production costs, but also increased the production of vegetables.