| CPC F16K 31/043 (2013.01) [F16K 27/067 (2013.01); F16K 31/042 (2013.01); F16K 5/0694 (2013.01)] | 17 Claims |
|
1. A valve actuator comprising:
a housing defining an inner space;
a motor disposed in the inner space of the housing;
a gear assembly disposed in the inner space of the housing and configured to transmit, to a ball valve, a driving force of the motor;
a flange coupled to the ball valve; and
a plurality of fastening members that couple the flange to the housing and including screws or bolts,
wherein the housing includes a lower case and an upper case coupled to the lower case, and the lower case includes a flange coupling part to which the flange is coupled by the plurality of fastening members,
wherein the flange includes:
a tap part insertion hole and a tap part (i) defining an inner surface of the tap part insertion hole and (ii) that couples to a tap portion of the ball valve,
a stem insertion hole communicating with the tap part insertion hole and configured to receive a stem of the ball valve, and
a plurality of holes defined at a constant distance from a center of the tap part insertion hole and arranged to extend in a circumferential direction,
wherein the flange coupling part includes a plurality of circular grooves into which the plurality of fastening members passing through the plurality of holes are fastened, respectively,
wherein the housing defines a power line passage hole through which an external power line configured to supply power to the motor passes,
wherein the power line passage hole is configured to, based on the external power line being passed through the power line passage hole, receive an adhesive, and
wherein an inner surface of the housing around the power line passage hole is provided with an adhesive receiving groove (i) greater than the power line passage hole and (ii) in which a portion of the adhesive is received.
|