Magnetic flow control valve
First Claim
1. A magnetic flow control valve including a valve housing consisting of a housing body and a cover closing an opening of said housing body and having an inlet and an outlet for pressurized fluid, a valve seat member located in said housing and having a valve seat in the form of a substantially conical inner surface, a substantially spherical valve body to be seated on said valve seat in said housing, a throttle adjusting plate made of a magnetic material arranged in the valve housing on opposite side of the valve seat with respect to said valve body and supported in said valve housing and shiftable toward and away from said valve seat, and electromagnet means for shifting said throttle adjusting plate toward and away from said valve seat to control flow rate of said pressurized fluid by changing electric current supplied to the electromagnet, said throttle adjusting plate further comprising elastic cushioning means on a side opposite to said valve body, for absorbing inertia forces of said throttle adjusting plate as the flow rate of said pressurized fluid is changed.
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Accused Products
Abstract
A magnet for control valve includes a housing having an inlet and an outlet for a pressurized fluid, a valve seat member having a conical inner surface valve seat, a spherical valve body adapted to be in line contact with the valve seat, a throttle adjusting plate made of a magnetic material shiftable toward and away from the valve seat, and an electromagnet for attracting and releasing the throttle adjusting plate to shift the valve body toward and away from the valve seat. According to the invention a sheet, preferably made of urethane foam is arranged on a side of the throttle adjusting plate opposite to the valve body, thereby eliminating noise caused by self-oscillation of the valve body and throttle adjusting plate, while maintaining high responsibility as a magnetic control valve.
12 Citations
12 Claims
- 1. A magnetic flow control valve including a valve housing consisting of a housing body and a cover closing an opening of said housing body and having an inlet and an outlet for pressurized fluid, a valve seat member located in said housing and having a valve seat in the form of a substantially conical inner surface, a substantially spherical valve body to be seated on said valve seat in said housing, a throttle adjusting plate made of a magnetic material arranged in the valve housing on opposite side of the valve seat with respect to said valve body and supported in said valve housing and shiftable toward and away from said valve seat, and electromagnet means for shifting said throttle adjusting plate toward and away from said valve seat to control flow rate of said pressurized fluid by changing electric current supplied to the electromagnet, said throttle adjusting plate further comprising elastic cushioning means on a side opposite to said valve body, for absorbing inertia forces of said throttle adjusting plate as the flow rate of said pressurized fluid is changed.
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9. A pneumatic actuator control system comprising;
- a first magnetic flow control valve having an outlet connectable to an inlet of pneumatic actuator supplied with compressed air, an inlet connectable to a compressed air supply source, a second magnetic flow control valve having an inlet connectable to an outlet of said pneumatic actuator and an outlet to be opened on a lower pressure side, voltage control means for changing voltages to be applied to said first and second magnetic flow control valves in the manner one voltage increases and the other decreases, each said magnetic flow control valves including a valve housing consisting of a housing body and a cover closing a opening of said housing body and having said inlet and outlet, a valve seat member located in said inlet and outlet, a valve seat member located in said housing and having a valve seat in the form of a substantially conical inner surface, a substantially spherical valve body to be seated on said valve seat in said housing, a throttle adjusting plate made of a magnetic material arranged in the valve housing on opposite side of the valve seat with respect to said valve body and supported in said valve housing so as to be shiftable toward and away from said valve seat, and electromagnet means for shifting said throttle adjusting plate toward and away from said valve seat to control flow rate of the compressed air by changing electric voltage supplied to the electromagnet means, said throttle adjusting plate provided with elastic cushioning means on a side opposite to said valve body for absorbing inertia forces of said throttle adjusting plate as the flow rate of said pressurized fluid is changed.
- View Dependent Claims (10, 11, 12)
Specification