Shut-off Valve for Integration into a Gas Meter

Patent metadata

Field	Value
Publication number	US-2016369898-A1
Application number	US-201615184251-A
Country	US
Kind code	A1
Filing date	Jun 16, 2016
Priority date	Jun 17, 2015
Publication date	Dec 22, 2016
Grant date	—

Abstract

A shut-off valve for integration into an intelligent gas meter for residential or industrial gas supply, has an inlet, an outlet and a valve seat having a lip seal. A shut-off body is longitudinally displaceable with respect to the valve by a motor driven transmission, using a nut-threaded-spindle drive, to engage with or disengage from, the seal to open or close the valve. The transmission of the valve remains largely unbiased in the closed state while maintaining the gas-tightness of the valve.

First claim

1 . A shut-off valve for integration in a gas meter, comprising a shut-off body which is longitudinally displaceable relative to the valve seat by means of a motor-driven reduction transmission with an integrated nut-threaded spindle drive,
wherein that the transmission is unbiased in the closed state of the valve while maintaining a gas-tightness.

2 . The shut off valve of claim 1 , wherein a biasing stroke is provided for the shut-off body in the closed position which, upon completing the closing process, drops back to an unbiasing stroke which unbiases the transmission while maintaining the gas-tightness.

3 . The shut off valve of claim 2 , wherein the biasing stroke of the shut-off body is limited by means of a fixed housing stop.

4 . The shut off valve of claim 2 , wherein the biasing stroke of the shut-off body is limited by means of its impact on a lip seal arranged in the valve seat.

5 . The shut off valve of claim 1 , wherein only a stroke within an unbiased transmission seat is specified for the shut-off body in the closing direction while guaranteeing the gas-tightness of the valve.

6 . The shut off valve of claim 1 , wherein the lip seal is pressed against the shut-off body in the closed position, supported by the gas pressure.

7 . A method of operating a shut-off valve for a gas meter comprising a shut-off body and a motor actuated transmission for longitudinal displacement of the shut-off body with respect to a valve seat provided with a seal,
wherein during the switching of the valve into the closed position, the shut-off body initially carries out a stroke up to the borderline biasing of the transmission and subsequently moves, by means of a small return stroke, into a position which unbiases the transmission while maintaining the gas-tightness of the valve.

8 . The method of claim 7 , wherein the motor is switched via a control switch, wherein detectors directly or indirectly detect the position of the shut-off body.

9 . The method of claim 7 , wherein during the switching of the valve into the closed position, the shut-off body moves directly into a position which unbiases the transmission while maintaining the gas-tightness of the valve.

10 . The method of claim 9 , wherein the motor is switched via a control switch, wherein detectors directly or indirectly detect the position of the shut-off body.

11 . The method of claim 7 , wherein the shut-off body is actuated from the closed position into the open position in a time-controlled way.

Assignees

• Johnson Electric Sa

Inventors

• Waehrisch Sten
• Ritschel Sten
• Herrmann Marcus

Classifications

• F16K31/53

  with toothed gearing · CPC title

• G01F15/005

  Valves (valves in general F16K) · CPC title

• F16K31/047 Primary

  characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means (F16K31/043 takes precedence) · CPC title

• F16K37/0025

  Electrical or magnetic means (F16K37/0075 takes precedence) · CPC title

• F16K1/34

  Cutting-off parts, e.g. valve members, seats (F16K1/06, F16K1/12, F16K1/14, F16K1/26 take precedence) · CPC title