Electrically actuated valve and electrically actuated valve body

Abstract

This electrically actuated valve comprises: a valve body having a cylindrical shell shape, with a first pipe connected to one end in an axial direction and a second pipe connected to the other end; a rotor disposed inside the valve body; a stator disposed outside the valve body and constituting a motor together with the rotor; a support member disposed on one-end side inside the valve body and converting rotation of the rotor into linear motion along the axial direction; a valve seat member disposed on the opposite side to the rotor in the axial direction inside the valve body and having a valve seat; a valve plug coupled to the rotor and linearly moving toward the valve seat in accordance with the linear motion of the rotor; and a positioning member disposed between the rotor and the valve seat member and having a preset length along the axial direction.

Claims

1. An electric valve comprising: a valve body having a cylindrical shape with a first pipe connected to one end in the axial direction and a second pipe connected to the other end; a rotor disposed inside the valve body; a stator disposed outside the valve body and constituting a motor together with the rotor; a support member disposed inside the valve body on the side of the one end and converting the rotation of the rotor into linear motion along the axial direction; a valve seat member disposed inside the valve body on the opposite side of the rotor in the axial direction and having a valve seat; a valve element connected to the rotor and moving linearly toward the valve seat in accordance with the linear motion of the rotor; and a positioning member disposed between the rotor and the valve seat member and having a predetermined length along the axial direction.

2. The electric valve according to claim 1, wherein one end of the positioning member in the axial direction is attached to one of the rotor and the valve seat member, and the other end of the positioning member in the axial direction extends toward the other of the rotor and the valve seat member.

3. The electric valve according to claim 2, wherein the valve seat member has a cylindrical cover portion provided on the side to which the second pipe is connected, and a cylindrical support portion provided on the rotor side, continuous with the cover portion, and having a valve seat facing the valve body formed thereon, and having a smaller diameter than the cover portion, and one end of the positioning member is attached to the end face of the cover portion of the valve seat member on the rotor side, and the positioning member has a ring-shaped coil portion arranged between the one end and the other end and wound along the outer circumferential surface of the support portion.

4. The electric valve according to claim 2 or 3, further comprising: a contact member disposed between the rotor and the valve seat member, facing the positioning member, having a contact surface that contacts the end face of the other end of the positioning member, wherein the height of the contact surface, measured along the axial direction, gradually increases according to the rotation direction of the rotor during tightening.

5. An electric valve body comprising: a valve body having a cylindrical shape with a first pipe connected to one end in the axial direction and a second pipe connected to the other end; a rotor disposed inside the valve body; a support member disposed inside the valve body on the side of the one end and converting the rotation of the rotor into linear motion along the axial direction; a valve seat member disposed inside the valve body on the opposite side of the rotor in the axial direction and having a valve seat; a valve element connected to the rotor and moving linearly toward the valve seat in accordance with the linear motion of the rotor; and a positioning member disposed between the rotor and the valve seat member and having a predetermined length along the axial direction.

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