GATE VALVE

• US 20020139954A1
• Filed: 10/22/2001
• Published: 10/03/2002
• Est. Priority Date: 03/28/2001
• Status: Active Grant

• Current Assignee: V TEX Corp. (Hitachi Zosen Corporation)
• Original Assignee: V TEX Corp. (Hitachi Zosen Corporation)
• Inventors: Ito, Ichio
• Granted Patent: US 6,474,622 B2
• Time in Patent Office: Days
• US Class Current: 251/326
• CPC Class Codes: F16K 3/10 with special arrangements for separating the sealing faces or for pressing them together
• CPC Class Codes: F16K 51/02 specially adapted for high-vacuum installations

Abstract

A pendulum gate valve incorporates an improved power transmission device for transmitting the movement of a pivot arm of the valve to a valve disk that selectively closes the valve. The power transmission device has a supporting plate and a valve disk support that is fixed to a tip end of the pivot arm and movable relative to the valve disk. First and second facing roller guide grooves, formed on the valve disk and on the valve disk support, respectively, extend obliquely downwardly so as to be separated from the valve disk. Third and fourth facing roller guide grooves, formed on the valve disk support and the supporting plate, respectively, extend obliquely downwardly so as to approach the valve disk. A first roller engages the first and second roller guide grooves, and a second roller engages the third and fourth roller guide grooves.

Claims

1. A pendulum gate valve comprising:

a valve housing including an interior space and first and second openings opposite to each other;

a valve seat disposed in the interior space around the edge of the first opening;

a valve disk mounted relative to the valve housing so that the valve disk is movable within the interior space between a completely opened position and a completely closed position, the valve disk being constructed so that when the valve disk is moved to the closed position the valve disk engages the valve seat and seals the first opening;

a pivot arm, the base end of which is pivotally secured to the valve housing;

an arm driving device for moving a tip end of the pivot arm between a first position where the valve disk is in the completely opened position and a second position where the valve disk is in the completely closed position; and

a power transmission device for transmitting the movement of the pivot arm to the valve disk;

the power transmission device having a first roller guide groove formed on the valve disk, a valve disk support fixed to the tip end of the pivot arm, movable relative to the valve disk, a second roller guide groove formed on the valve disk support so as to face to the first roller guide groove, a third roller guide groove formed on the valve disk support, a supporting plate, a fourth roller guide groove formed on the supporting plate so as to face to the third roller guide groove, a first roller engaging with the first and second roller guide grooves, and a second roller engaging with the third and fourth roller guide grooves, each of the first and second roller guide grooves extending downwards obliquely so as to be separated from the valve disk, and each of the third and fourth roller guide grooves extending downwards obliquely so as to approach to the valve disk.

5. The pendulum gate valve according to claim 1, further comprising a member for preventing resiliently the supporting plate from moving relative to the valve disk in the moving direction of the pivot arm.

9. The pendulum gate valve according to claim 1, further comprising a member for preventing resiliently the valve disk from moving relative to the valve disk support in the moving direction of the pivot arm.

13. The pendulum gate valve according to claim 9, further comprising a member for preventing resiliently the valve disk from moving relative to the valve disk support in the moving direction of the pivot arm.

14. The pendulum gate valve according to claim 1, further comprising a stopper projected downwards from the lower end of the valve disk.

18. The pendulum gate valve according to claim 5, further comprising a stopper projected downwards from the lower end of the valve disk.

19. The pendulum gate valve according to claim 9, further comprising a stopper projected downwards from the lower end of the valve disk.

2. A pendulum gate valve comprising:

a valve housing including an interior space and first and second openings opposite to each other;

a valve seat disposed in the interior space around the edge of the first opening;

a valve disk mounted relative to the valve housing so that the valve disk is movable within the interior space between a completely opened position and a completely closed position, the valve disk being constructed so that when the valve disk is moved to the closed position the valve disk engages the valve seat and seals the first opening;

a pivot arm, the base end of which is pivotally secured to the valve housing;

an arm driving device for moving a tip end of the pivot arm between a first position where the valve disk is in the completely opened position and a second position where the valve disk is in the completely closed position; and

a power transmission device for transmitting the movement of the pivot arm to the valve disk;

the power transmission device having a first roller guide groove formed on the valve disk, a valve disk support fixed to the tip end of the pivot arm, movable relative to the valve disk, a second roller guide groove formed on the valve disk support so as to face to the first roller guide groove, a third roller guide groove formed on the valve disk support, a supporting plate, a fourth roller guide groove formed on the supporting plate so as to face to the third roller guide groove, a first roller engaging with the first and second roller guide grooves, and a second roller engaging with the third and fourth roller guide grooves, the first roller guide groove extending downwards obliquely so as to be separated from the valve disk and then extending downwards substantially vertically, the second roller guide groove extending upwards obliquely so as to approach to the valve disk and then extending upwards substantially vertically, the third roller guide groove extending downwards obliquely so as to approach to the valve disk and then extended downwards substantially vertically, and the fourth roller guide groove extending upwards obliquely so as to be separated from the valve disk and then extended upwards substantially vertically.

6. The pendulum gate valve according to claim 2, further comprising a member for preventing resiliently the supporting plate from moving relative to the valve disk in the moving direction of the pivot arm.

10. The pendulum gate valve according to claim 2, further comprising a member for preventing resiliently the valve disk from moving relative to the valve disk support in the moving direction of the pivot arm.

15. The pendulum gate valve according to claim 2, further comprising a stopper projected downwards from the lower end of the valve disk.

3. A pendulum gate valve comprising:

a valve housing including an interior space and first and second openings opposite to each other;

a valve seat disposed in the interior space around the edge of the first opening;

a valve disk mounted relative to the valve housing so that the valve disk is movable within the interior space between a completely opened position and a completely closed position, the valve disk being constructed so that when the valve disk is moved to the closed position the valve disk engages the valve seat and seals the first opening;

a pivot arm, the base end of which is pivotally secured to the valve housing;

an arm driving device for moving a tip end of the pivot arm between a first position where the valve disk is in the completely opened position and a second position where the valve disk is in the completely closed position; and

a power transmission device for transmitting the movement of the pivot arm to the valve disk;

the power transmission device having a pair of holders facing each other with a space therebetween, mounted on a back surface of the valve disk opposite to the valve seat, a first roller guide groove formed on each of opposite surfaces of the holders, a valve disk support fixed to the tip end of the pivot arm, movable relative to the valve disk, a second roller guide groove formed on the valve disk support so as to face to the first roller guide groove, a third roller guide groove formed on the valve disk support, a supporting plate, a fourth roller guide groove formed on the supporting plate so as to face to the third roller guide groove, a first roller engaging with the first and second roller guide grooves, and a second roller engaging with the third and fourth roller guide grooves, each of the first and second roller guide grooves extending downwards obliquely so as to be separated from the valve disk, and each of the third and fourth roller guide grooves extending downwards obliquely so as to approach to the valve disk.

7. The pendulum gate valve according to claim 3, further comprising a member for preventing resiliently the supporting plate from moving relative to the valve disk in the moving direction of the pivot arm.

11. The pendulum gate valve according to claim 3, further comprising a member for preventing resiliently the valve disk from moving relative to the valve disk support in the moving direction of the pivot arm.

16. The pendulum gate valve according to claim 3, further comprising a stopper projected downwards from the lower end of the valve disk.

4. A pendulum gate valve comprising:

a valve housing including an interior space and first and second openings opposite to each other;

a valve seat disposed in the interior space around the edge of the first opening;

a valve disk mounted relative to the valve housing so that the valve disk is movable within the interior space between a completely opened position and a completely closed position, the valve disk being constructed so that when the valve disk is moved to the closed position the valve disk engages the valve seat and seals the first opening;

a pivot arm, the base end of which is pivotally secured to the valve housing;

an arm driving device for moving a tip end of the pivot arm between a first position where the valve disk is in the completely opened position and a second position where the valve disk is in the completely closed position; and

a power transmission device for transmitting the movement of the pivot arm to the valve disk;

the power transmission device having a pair of holders facing each other with a space therebetween, mounted on a back surface of the valve disk opposite to the valve seat, a first roller guide groove formed on each of opposite surfaces of the holders, a valve disk support fixed to the tip end of the pivot arm, movable relative to the valve disk, a second roller guide groove formed on the valve disk support so as to face to the first roller guide groove, a third roller guide groove formed on the valve disk support, a supporting plate, a fourth roller guide groove formed on the supporting plate so as to face to the third roller guide groove, a first roller engaging with the first and second roller guide grooves, and a second roller engaging with the third and fourth roller guide grooves, the first roller guide groove extending downwards obliquely so as to be separated from the valve disk and then extending downwards substantially vertically, the second roller guide groove extending upwards obliquely so as to approach to the valve disk and then extending upwards substantially vertically, the third roller guide groove extending downwards obliquely so as to approach to the valve disk and then extended downwards substantially vertically, and the fourth roller guide groove extending upwards obliquely so as to be separated from the valve disk and then extended upwards substantially vertically.

8. The pendulum gate valve according to claim 4, further comprising a member for preventing resiliently the supporting plate from moving relative to the valve disk in the moving direction of the pivot arm.

12. The pendulum gate valve according to claim 4, further comprising a member for preventing resiliently the valve disk from moving relative to the valve disk support in the moving direction of the pivot arm.

17. The pendulum gate valve according to claim 4, further comprising a stopper projected downwards from the lower end of the valve disk.