Electrically controlled pneumatic shunt valve

Abstract

The invention discloses an electrically controlled pneumatic shunt valve. The electrically controlled pneumatic shunt valve comprises an air inlet pipe, an air opening, rubber membranes, a tension spring, a piston, a water outlet, a plugging plate, a filter screen, a water inlet pipe, a manual plug, two-position three-way magnetic valves, a valve body, a shell and a bottom plate, wherein the three two-position three-way magnetic valves are connected in series through the air inlet pipe and mounted on the air opening of the shell; the valve body is fixed in an inner cavity of the shell; the piston is supported and suspended on the valve body through the tension spring, the upper end of the piston is sealed through one rubber membrane so that the upper end of the piston and the shell can form an air chamber, and the lower end of the piston is sealed through the other rubber membrane pressed by the plugging plate so that the lower end of the piston and the valve body can form a small cavity; the valve body is provided with the water outlet in the position of the small cavity; the bottom of the valve body is sealed through the bottom plate so that a master cavity can be formed; the filter screen stretches cross the master cavity of the valve body, one end of the filter screen is connected with the valve body through the manual plug, and the other end of the filter screen is fixedly connected with the valve body through the water inlet pipe. By adoption of a two-position three-way magnetic valve control system, the electrically controlled pneumatic shunt valve is large in flow, easy and convenient to clean and convenient to mount, the service life is longer than five years, and cost is reduced by 50%.

Description

technical field [0001] The invention relates to the technical field of brake cooling for trucks and mechanical equipment, in particular to an electronically controlled pneumatic diverter valve. Background technique [0002] At present, electromagnetic valves are mostly used in the brake cooling system of trucks. Solenoid valves have the following disadvantages: 1. The vibration of the truck is very large during driving. The spring is prone to fatigue, and the elastic force decays, which makes it impossible to shut off the water; 2. The energy consumption is large, generally between 30-50w, and the coil generates a lot of heat. When there is no water passing through, the coil accumulates more and more heat, and the temperature decreases. 3. Because of the high power, it is necessary to install a relay in the control circuit, which increases the cost; 4. When the medium contains impurities, the closure is not tight and leaks; 5. Due to the large flow range of the truck, It ne...

AI Technical Summary

Problems solved by technology

[0002] At present, solenoid valves are mostly used in the brake cooling system of trucks. Solenoid valves have the following disadvantages: 1. The vibration of the truck is very large during driving.

The spring is prone to fatigue, and the elastic force decays, which makes it impossible to shut off the water; 2. The energy consumption is large, generally between 30-50w, and the coil generates a lot of heat. When there is no water passing through, the coil accumulates more and more heat, and the temperature decreases. 3. Because of the high power, it is necessary to install a relay in the control circuit, which increases the cost; 4. When the medium contains impurities, the closure is not tight and leaks; 5. Due to the large flow range of the truck, It needs to cross different climatic zones and seasons, and the temperature difference is large. In winter, the valve is easy to freeze and crack.

In summer, the solenoid valve is more likely to burn out when the vehicle is exposed to the sun and energized; 6. The spool hole of the solenoid valve with the same size as the water pipe is so small that the flow of fluid is blocked and the flow is small; 7. Trucks need several sets of valves because of the axle, and the solenoid valve The installation requires the connecting parts of the squadron, which is cumbersome to install, and the size is too large and the cost is high; 8. The truck is filled with water anytime and anywhere, so the water quality is different, and it is necessary to install a filter in front of the solenoid valve; 9. There are many brake drums on the truck, and the water After coming out of the valve, it is necessary to install a water distribution tank

The solenoid valve is unreliable in the truck brake cooling system. Trucks in many mountainous areas and mining areas need to install a spare cooling system, which greatly increases the cost.

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