Large-flow electromagnetic ball valve

Abstract

The invention relates to a large-flow electromagnetic ball valve. The large-flow electromagnetic ball valve is characterized by comprising a valve shell, a first valve sleeve, a second valve sleeve, avalve core and a pilot control valve, wherein the valve shell is provided with an oil outlet, a pressure oil port and an oil return port; the first valve sleeve is provided with the first valve port,a first side hole is formed in the side wall of the first valve sleeve, a first push rod is arranged in the first valve sleeve, and a first control cavity is formed in the right side of the first push rod; the second valve sleeve is provided with a second valve port, a second side hole is formed in the side wall of the second valve sleeve, a second push rod is arranged in the second valve sleeve,a second control cavity is formed in the right side of the second push rod, and a first flow channel is further arranged in the valve shell; the valve core is arranged in a sliding mode, and the width of the convex shoulder of the valve core is larger than that of the oil outlet; and the pilot control valve is arranged on the valve shell, the pilot pressure oil port of a pilot control valve coreis communicated with the second control cavity, the pilot oil outlet is communicated with the first control cavity, and the pilot oil return port is communicated with the oil return port. According tothe large-flow electromagnetic ball valve, the flow of the large-flow electromagnetic ball valve can reliably work under the working condition that the flow is larger than 40L / min, and the transitionposition is free of leakage.

Description

technical field [0001] The invention relates to an electromagnetic ball valve, in particular to a large flow electromagnetic ball valve. Background technique [0002] The control valve is one of the main components of the hydraulic system, and the electromagnetic ball valve is one of the control valves. Solenoid ball valve is an electromagnetic control valve with a spherical spool. In addition to all the characteristics of solenoid valves, it also has some unique characteristics. It uses the thrust of the electromagnet as the driving force to push the steel ball to realize the on-off of the oil circuit. It is suitable for the hydraulic system with various mineral oils as the working medium to realize the hydraulic control without leakage. It can also be used as the direction control of other actuators when the flow-pressure drop characteristic requirements are met. The authorized announcement number is "CN202048222U", and the utility model patent named "direct push electro...

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Problems solved by technology

[0003] (1) Because the driving force of the electromagnet is limited, the greater the flow rate, the greater the hydraulic force on the steel ball. In the application conditions with a flow rate greater than 40L / min, the above invention, including other electromagnetic ball valves on the market, cannot be reliable. get the job done

[0004] (2) Although the above-mentioned invention can realize no leakage in the two working positions, in the transition position, that is, the steel ball is separated from the valve seat of the T port or the valve seat of the P port, and is between the valve seat of the T port and the valve seat of the P port. When the seats are not in contact with the valve seat at any end, the P port, A port and T port are connected at this time, and the oil in the P port will directly flow back to the T port. At this time, the goal of no leakage cannot be achieved. This is not allowed in applications where leakage is critical

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