Gas shut-off valve

Patent metadata

Field	Value
Publication number	US-9784382-B2
Application number	US-201414474951-A
Country	US
Kind code	B2
Filing date	Sep 2, 2014
Priority date	Sep 2, 2013
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A gas shut-off valve for installation in gas meters, has a valve disk that can be moved in the longitudinal direction with respect to its valve seat. The movement is realized by a linear unit held in the longitudinal direction in a valve casing, which is actuated by an electric motor via reduction gearing. The valve seat has a lip seal. The electric motor is a small DC motor. The reduction gearing and the linear unit, are installed in a panel of the valve casing. The linear unit is a rack-and-pinion gearing or a sliding-screw gearing, having an adjusting-nut element and an adjusting rod.

First claim

The invention claimed is:

1. A gas shut-off valve for installation in gas meters, comprising: a valve disk that can be moved in a longitudinal direction with respect to a valve seat, said valve disk being seated on an adjusting rod held in the longitudinal direction in a valve casing, and a coupled linear unit that is actuated by an electric motor via reduction gearing,
wherein,
a) the valve seat has a lip seal,
b) the electric motor is a DC motor,
c) the reduction gearing is arranged laterally on the side of the linear unit, and
d) the linear unit configured to be a sliding screw gearing, comprising an adjusting-nut element and the adjusting rod integrated into a panel of the valve casing, wherein the external thread of the adjusting rod is disengaged from the internal thread of the adjusting-nut element at least in the closed position and/or in the open position of the valve.

2. The gas shut-off valve of claim 1 , wherein the adjusting-nut element is actuated by the reduction gearing and is rotatably mounted in a lower housing part, and the adjusting rod is anti-rotationally placed in a longitudinally displaceable way.

3. The gas shut-off valve of claim 1 , wherein the valve disk is configured to provide low resistance for gas flow entering from the gas inlet.

4. The gas shut-off valve of claim 1 , wherein the reduction gearing is a multiple-reduction spur gearing.

5. The gas shut-off valve of claim 1 , wherein the panel forms a separate housing chamber for the small DC motor and a lateral gas outlet opening.

6. The gas shut-off valve of claim 1 , wherein the adjusting rod, actuated by the reduction gearing, is rotatably mounted in a lower housing part, and the adjusting-nut element is anti-rotationally placed in the area of the panel wherein the adjusting-nut element is mounted in a longitudinally displaceable way.

7. The gas shut-off valve of claim 1 , wherein the reengagement of the external thread of the adjusting rod with the internal thread of the adjusting-nut element in the open position is realized by the pre-loaded pressure spring.

8. The gas shut-off valve of claim 1 , wherein the reengagement of the external thread of the adjusting rod with the internal thread of the adjusting-nut element in the closed position is realized by the pre-loaded lip seal.

Assignees

• Johnson Electric Sa

Inventors

• Wahrisch Sten
• Gassmann Joerg
• Fraulob Sebastian

Classifications

• F16K31/045 Primary

  with torque limiters · CPC title

• F16K31/52408

  comprising a lift valve · CPC title

• G01F15/005

  Valves (valves in general F16K) · CPC title

• F16K31/048

  with torque limiters (F16K31/041 takes precedence) · CPC title

• F16K1/42

  Valve seats (for double-seat valves F16K1/44) · CPC title