Waterproof and explosion-proof circuit board and electronic valve actuator for flow control applications
A bulkhead passthrough connector containing a printed circuit board (PCB) for transferring electrical signals across a bulkhead to an electronic valve actuator, an electronic valve actuator configured to operate and communicate with a valve using a PCB through a bulkhead, the electronic valve actuator, and a method of assembling a bulkhead passthrough connector incorporating a PCB. The embodiments may include a passthrough partition which separates one side of the bulkhead from another. A PCB retainer may also be secured to the passthrough partition. The PCB is attached to the PCB retainer and extends from one side to another side of the bulkhead through the passthrough partition. The PCB further includes electrical paths printed on the PCB and electrical connectors located on both sides of the bulkhead to enable communication with external devices.
1. A printed circuit board bulkhead assembly comprising:
a passthrough connector for transferring electrical signals across a bulkhead to an electronic valve actuator, the passthrough connector comprising:
a passthrough partition separating a first side of the bulkhead and a second side of the bulkhead; and
a printed circuit board retainer secured to the passthrough partition;
a printed circuit board secured to the printed circuit board retainer and extending from the first side of the bulkhead to the second side of the bulkhead through the passthrough partition, the printed circuit board being configured to transmit electric signals from between the first side of the bulkhead and the second side of the bulkhead, the printed circuit board comprises electrical paths printed thereon and electrical connectors located at the first side of the bulkhead and the second side of the bulkhead configured to enable communication with external devices;
at least one fastener to releasably secure the printed circuit board retainer to the passthrough partition; and
a plurality of seals comprising:
a weather-proof conduit seal between the printed circuit board retainer and at least one of the printed circuit board or the passthrough partition; and
an explosion-proof seal between the printed circuit board retainer and at least one of the printed circuit board or the passthrough partition.
2. The bulkhead passthrough connector of claim 1 , wherein the printed circuit board retainer maintains an aperture to cooperate and retain the printed circuit board.
3. The bulkhead passthrough connector of claim 1 , wherein the printed circuit board retainer is comprised of a one or more separate sections joined together to secure the printed circuit board.
4. The bulkhead passthrough connector of claim 1 , wherein the printed circuit board is a multi-layer circuit with multiple signal traces.
5. The bulkhead passthrough connector of claim 1 , wherein the electrical connectors of the printed circuit board includes at least one of power, control, power lead, power for an ac actuator, power for a dc actuator, analog connections to disclose valve position, input and output, and antenna connections.
6. The bulkhead passthrough connector of claim 1 , wherein the printed circuit board further comprises traces with RF strip-line and micro-strip printed circuit board layout.
7. The bulkhead passthrough connector of claim 1 , wherein the printed circuit board further comprises printed circuit board mounted connectors on at least one side of the bulkhead.
8. The bulkhead passthrough connector of claim 1 , wherein the printed circuit board further comprises board-to-board connections on at least one side of the bulkhead.
9. The bulkhead passthrough connector of claim 1 , wherein the printed circuit board further comprises terminal blocks directly connected to the printed circuit board on at least one side of the bulkhead.
10. The bulkhead passthrough connector of claim 1 , wherein the printed circuit board transmits signals to one or more actuators, pumps and/or valve positioners.
11. The bulkhead passthrough connector of claim 10 , wherein the bulkhead is positioned between a valve and a valve actuator and the printed circuit board communicates between the valve and the valve actuator.
12. The bulkhead passthrough connector of claim 1 , wherein the printed circuit board is controlled by local control, wired remote controls, wireless controls, wired network inputs, and/or wireless network inputs.