Compressed natural gas (CNG) pressure regulator

Patent metadata

Field	Value
Publication number	US-10683945-B2
Application number	US-201816220274-A
Country	US
Kind code	B2
Filing date	Dec 14, 2018
Priority date	Oct 13, 2016
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

A flow regulator for a compressed natural gas (CNG) system is defined by a housing having at least one inlet port, at least one outlet port and at least one interior passage fluidically interconnecting the inlet and outlet ports. A mechanical bypass valve is disposed between the inlet and outlet ports and enabled by a movable biased feature which moves based on inlet pressure and in which the bypass valve is closed only after inlet pressure is greater than a predetermined threshold. The bypass valve is a fail safe wherein gas regulation does not occur until the inlet pressure is sufficient to close the bypass valve. The flow regulator further includes a coolant bowl defined by a serpentine channel formed in a coolant plate as well as a balanced valve as a regulator control feature in conjunction with a weighting or loading mechanism having a diaphragm.

First claim

The invention claimed is:

1. A flow regulator for a compressed natural gas (CNG) system, the regulator comprising:
a housing comprising a gas inlet port, a gas outlet port, a first coolant port, a second coolant port and an interior; and
a coolant plate disposed within the interior of the housing, said coolant plate including a plurality of circumferentially spaced spokes symmetrically disposed about the center of the coolant plate and a recessed channel formed about the spokes in a serpentine pattern in which opposing ends of the recessed channel are fluidically connected to the first and second coolant port, respectively, and through which a cooling fluid is directed to control the temperature of CNG separately flowing through the housing between the gas inlet port and the gas outlet port.

2. The flow regulator as recited in claim 1 , in which the first and second coolant ports are adapted for connection to a source of cooling fluid.

3. The flow regulator as recited in claim 2 , in which the recessed channel has a first opening fluidically connected to the first coolant port and a second opening fluidically connected to the second coolant port, the first and second openings being formed at the opposite ends of the recessed channel.

4. The flow regulator as recited in claim 1 , in which the first opening and second openings are formed through the coolant plate.

5. A method for manufacturing a flow regulator for a compressed natural gas (CNG) system comprising:
providing a flow regulator housing having a gas inlet port, a gas outlet port, and an interior through which compressed natural gas flows; and
providing a cooling circuit including a coolant plate within the housing interior, a first coolant port, and a second coolant port formed in the housing, the coolant plate having a recessed channel formed in a surface of the coolant plate through which a cooling fluid circulates to control the temperature of the CNG flowing separate from the cooling fluid between the gas inlet port and gas outlet port, the coolant plate including a plurality of spokes circumferentially and symmetrically disposed about the center of the coolant plate, and in which the recessed channel is formed about the plurality of spokes to define a serpentine pattern, the recessed channel having opposing ends fluidically connected to the first and second coolant ports, respectively.

6. The method as recited in claim 5 , in which the first and second coolant ports are adapted for connection to a source of cooling fluid.

7. The method as recited in claim 6 , in which the recessed channel includes a first opening connected to the first coolant port and a second opening connected to the second coolant port, the first and second openings being formed on the opposing ends of the channel.

8. The method as recited in claim 7 , in which the first and second openings are formed through the coolant plate.

9. The cooling circuit as recited in claim 8 , in which the recessed channel has a first opening and a second opening at the opposing ends of the channel, the first opening being fluidically connected to the first coolant port and the second opening being fluidically connected to the second coolant port.

10. The cooling circuit as recited in claim 9 , in which each of the first and second coolant ports are adapted for connection to a source of coolant fluid.

11. The cooling circuit as recited in claim 9 , in which the first and second openings are formed in the coolant plate.

12. A cooling circuit for a flow regulator of a compressed natural gas (CNG) system, the flow regulator comprising a housing having a gas inlet port, a gas outlet port and an interior, the cooling circuit comprising:
a coolant plate sized and configured for placement within the interior of the housing,
a first coolant port, and
a second coolant port, each of the first and second coolant ports being formed in the housing, the coolant plate having a recessed channel formed in a surface of the coolant plate through which a cooling fluid circulates to control the temperature of CNG separately flowing through the housing between the gas inlet port and the gas outlet port, wherein the coolant plate includes a plurality of spokes circumferentially and symmetrically spaced about the center of the coolant plate, in which the recessed channel is formed about the plurality of spokes to form a serpentine pattern, the recessed channel having opposing ends fluidically connected to the first and second coolant ports, respectively.

13. The cooling circuit as recited in claim 12 , in which the serpentine pattern is symmetric about the center of the cooling coolant plate.

Assignees

• Itt Mfg Enterprises Llc

Inventors

• Wiley Darrell T
• Gotthelf Jeffrey B
• Tucker Christopher

Classifications

• Y02T10/30

  Use of alternative fuels, e.g. biofuels · CPC title

• F16K17/04 Primary

  spring-loaded · CPC title

• F02M21/0239 Primary

  Pressure or flow regulators therefor · CPC title

• G05D7/0133

  within the flow-path · CPC title

• F02M21/0215

  Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas · CPC title