Is it okay for a drip irrigation system to not use an intake and exhaust valve?

I don't know what drip irrigation system you use, I've never seen drip irrigation with an exhaust valve. Drip irrigation system composition Drip irrigation system is generally composed of water source engineering, head hub, water transmission and distribution pipe network, dripper and control, measurement and protection devices. The water source of the drip irrigation system can be wells, springs, reservoirs, channels, rivers, lakes, ponds, etc., but the water quality must meet the requirements of irrigation water quality.

The water source project of drip irrigation system generally refers to the water retention, water diversion, water storage, water lifting and sedimentation projects built for drip irrigation from water sources, as well as the corresponding power transmission and distribution projects. The first hub of the drip irrigation system includes the power machine, water pump, fertilization (medicine) device, filtration facilities and safety protection and measurement control equipment.

Its function is to take water from the water source and pressurize and inject fertilizer (pesticides) to be filtered and transported into the pipe network on time and in quantity, which is responsible for the driving, measurement and regulation of the whole system, and is the control and deployment center of the whole system. The commonly used pumps for drip irrigation include submersible pumps, centrifugal pumps, deep well pumps, pipeline pumps, etc., and the role of the water pump is to pressurize the water flow to the required pressure of the system and transport it to the water distribution network. The power engine can be an electric motor, a diesel engine, etc.

If the natural head of the water source (towers, high pools, pressure feed pipes) meets the pressure requirements of the drip irrigation system, pumps and power can be dispensed with. The filtration equipment is to filter the water flow to prevent all kinds of dirt from entering the drip irrigation system, clogging the dripper or forming sediment in the system. Filtration equipment includes trash rack, centrifugal filter, sand and gravel filter, screen filter, laminated filter, etc.

When the water source is a water source with poor water quality, such as rivers and reservoirs, a sedimentation tank needs to be built. The function of the fertilization device is to make the fertilizers, pesticides, herbicides, chemical control drugs, etc. that are easily soluble in water and suitable for root application fully dissolved in the fertilizer tank, and then transported to the roots of crops through the drip irrigation system. Flow and pressure measuring instruments are used for flow and pressure measurement in pipelines, generally including pressure gauges, water meters, etc.

The safety protection device is used to ensure that the system works within the specified pressure range, eliminate the air resistance and vacuum in the pipeline, etc., generally including controllers, sensors, solenoid valves, hydraulic valves, air valves, etc. The regulating control device generally includes a variety of valves, such as gate valves, ball valves, butterfly valves, etc., whose function is to control and regulate the flow and pressure of the drip irrigation system. 3. Water transmission and distribution pipe network The function of the water transmission and distribution pipe network is to transport and distribute the treated water flow of the first hub to each irrigation unit and dripper according to the requirements, including the main pipe, branch pipe, capillary and the required connecting pipe fittings and control and regulating equipment.

Due to the size of the drip irrigation system and the layout of the pipe network, the pipe network is classified differently. 4. Dripper The dripper is the most critical component of the drip irrigation system, and it is the equipment that directly applies water and fertilizer to crops. Its function is to use the tiny flow channel or hole of the dripper to dissipate energy and reduce pressure, so that the water flow becomes water droplets and is evenly applied to the soil in the root zone of the crop.

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The exhaust valve is generally used in the large-scale first fertilization filtration system, for example, the 3-inch 4-inch centrifugal mesh filter system, which is installed in the upper U-shaped pipe of the centrifugal filter, and is not installed in the drip irrigation system such as greenhouses.

The irrigation system should be equipped with inlet and exhaust valves, mainly to prevent the irrigation water backflow or water hammer and other pressure changes in the pipeline once the irrigation is over, thereby destroying the water supply pipeline or dripper of the irrigation system.

I haven't heard that drip irrigation has to be exhausted, there are many drip holes on the drip irrigation belt, and the gas is directly discharged from the drip holes. I don't understand that they're looking for me.

1. The check valve is mainly to prevent the medium from flowing back. Generally, it works automatically under medium stress.

2. The ball valve mainly controls the opening and closing of the pipeline.

3. The intake and exhaust valves are mainly used to remove pipeline gas and prevent cavitation in the pipeline. This valve generally works automatically under gas pressure.

The check valve is the valve for water return, the ball valve is for switching, and the intake and exhaust valve is for pressurization and air discharge in the pipeline.

It's okay to use it at home without an exhaust valve, but it's like this bath bomb in my house, or a heater or something, basically you can't use the exhaust valve, and it feels useless.

The exhaust valve is to exhaust air to the outside.

The use of a "breather valve" in a vacuum system is actually the same function, but the direction of installation has changed.

Yes, the vacuum suction valve is a type of composite exhaust valve. The composite exhaust valve is used for vacuum pressure stabilization, which is called a vacuum suction valve.

The fire pipe is not equipped with an exhaust valve, and the air in the pipe is difficult to empty, and the presence of air makes the pressure change greatly when pressurized, so it is recommended to discharge the air as much as possible before suppression.

An automatic exhaust valve should be set at the highest point of the pipeline of the fire water supply system.

In order to ensure that the fire hydrant and automatic water extinguishing system can discharge water in time during a fire, it is stipulated that an automatic exhaust valve is set at the highest part of the water inlet pipeline. Because the air in the pipe obstructs the passage of water, in order to improve the ability of water flow, the air in the channel should be discharged, so the system requires an automatic exhaust valve.

OK yes, the top of the main riser.

It is not possible to use the safety exhaust valve of the compressed air of the air reservoir of the truck brake system, so that the compressed air always maintains a safe pressure, and the excess air is discharged, which will ensure safety.

Controls the air displacement of the engine. Generally, when the valve is opened to the maximum, the engine is most efficient and provides the most horsepower. The opposite is true when it is turned to the minimum.

The drip irrigation system is composed of four parts: water source engineering, the first hub (including water pumps, power machines, filters, fertilizer injection devices, measurement and control instruments, etc.), water transmission and distribution pipelines at all levels and drippers, and the main components of the system are as follows: 1. Power and pressurization equipment includes water pumps, electric motors or diesel engines and other power machinery, in addition to self-pressure systems, these equipment are the power and flow sources of the micro irrigation system. 2. Water purification equipment or facilities include sedimentation (lake) tanks, primary trash racks, swirl sediment diverters, screen filters and medium filters.

A combination can be selected according to the water quality conditions of the water source. The main function of the screen filter is to filter out the suspended matter in the irrigation water, so as to ensure that the whole system, especially the dripper, is not blocked. The screen is mostly made of nylon or corrosion-resistant metal wire, and the size of the mesh depends on the size of the dirt particles to be filtered, generally to remove 75 microns of sediment, 200 mesh screens are required.

The sand and gravel filter is made of washed and sorted gravel and sand and filled into the metal cylinder in a certain order, which has a good filtration effect on all kinds of organic or organic dirt and suspended algae. The cyclone sediment separator relies on centrifugal force to separate sand particles with a specific gravity greater than water from water, but cannot remove organic matter.

3. The water flows into the irrigator by the capillary, and the irrigator injects the irrigation water into the soil under a certain working pressure. It is the heart of the drip irrigation system. The water drip or seep out at a constant low flow through the irrigator and then diffuse in the soil in the form of an unsaturated stream under the dripper.

At present, there are two main types of irrigators used in drip irrigation projects: drippers and drip irrigation belts.

4 Chemical fertilizer and pesticide injection devices and containers include differential pressure fertilizer applicators, venturi injectors, diaphragm or piston injection pumps, fertilizer or pesticide solution storage tanks, etc. It must be installed in front of the filter to prevent the dissolved fertilizer particles from clogging the drip device. There are three ways to inject fertilizers:

One is to use a small water pump to hydrate the fertilizer into the main pipe; the other is to use the pressure difference caused by the flow regulating valve on the pipe to inject the fertilizer into the dry pipe; The third is jet injection.

5. Control and measurement equipment includes water meters and pressure gauges, various manual, mechanical or electrically operated gate valves, such as hydraulic automatic control valves, flow regulators, etc.

6. Safety protection equipment such as pressure reducing valves, intake and exhaust valves, check valves, drain valves, etc.