Trip manifold

A trip manifold comprising:

• a manifold body connected to a first header shaft,
• the first header shaft passing through a first set of a plurality of rotary valves and a second set of a plurality of rotary valves,
• each of the first and second sets of rotary valves being connected to their own individual pressure transmitters,
• the first header shaft comprising a first set of two passages including a first transmitter input passage and a first drain passage and a second set of passages including a second transmitter input passage and a second drain passage, the first set of rotary valves each comprising a first through passage, the second set of rotary valves each comprising a second through passage,
• the manifold body providing fluid communication between a first input source and the first transmitter input passage of first header shaft and between a second input source and the second transmitter input passage of the first header shaft,
• the manifold also providing communication between the first drain passage and a drain vent and between the second drain passage and the drain vent,
• the first set of rotary valves each being independently rotatable between two positions including
• a transmit position where the first through passage of each valve of the first set of valves provides communication between the first transmitter input passage of the first header shaft and their respective pressure transmitters and
• a drain position where the first through passage of each valve of the first set of valves is in communication with the first drain passage of the first header shaft,
• the second set of rotary valves each being independently rotatable between two positions including
• a transmit position where the second through passage of each valve of the second set of valves provides communication between the second transmitter input passage of the first header shaft and their respective pressure transducers and
• a drain position where the second through passage of each valve of the second set of valves is in communication with the second drain passage of the first header shaft.

A method of replacing a pressure transmitter of a trip device of a turbine assembly while the turbine is running, the method comprising:

• providing a trip manifold comprising a manifold body connected to a header shaft, the header shaft passing through a plurality of rotary valves, each of rotary valves being connected to its own pressure transmitter, the header shaft comprising two passages including a transmitter input passage and a drain passage, the rotary valves each comprising a through passage, the manifold body providing fluid communication between an input source and the transmitter input passage of header shaft, the manifold also providing communication between the drain passage of the header shaft and a drain vent, the rotary valves each being independently rotatable between two positions including a transmit position where the through passage of each valve provides communication between the transmitter input passage of the header shaft and their respective pressure transducers and a drain position where the through passage of each valve is in communication with the drain passage of the header shaft;
• with all valves in the transmit position and with the turbine running, determining which transmitter needs replacing;
• pivoting the valve connected to the transmitter that needs replacing to the drain position;
• removing and replacing said transmitter;
• pivoting said valve back to the transmit position.

A turbine having a single trip manifold, the single trip manifold comprising:

• a manifold body connected to a first header shaft and second header shaft,
• the first header shaft passing through a first set of a plurality of rotary valves and a second set of a plurality of rotary valves, the second header shaft passing through a third set of a plurality of rotary valves and a fourth set of a plurality of rotary valves,
• each of the first, second, third and fourth sets of rotary valves being connected to their own individual pressure transmitters,
• the first header shaft comprising a first set of two passages including a first transmitter input passage and a first drain passage and a second set of passages including a second transmitter input passage and a second drain passage, the first set of rotary valves each comprising a first through passage, the second set of rotary valves each comprising a second through passage,
• the second header shaft comprising a third set of two passages including a third transmitter input passage and a third drain passage and a fourth set of passages including a fourth transmitter input passage and a fourth drain passage, the third set of rotary valves each comprising a third through passage, the fourth set of rotary valves each comprising a fourth through passage,
• the manifold body providing fluid communication between a first input source and the first transmitter input passage of first header shaft and between a second input source and the second transmitter input passage of the first header shaft, the manifold also providing communication between the first drain passage and a drain vent and between the second drain passage and the drain vent,
• the manifold body providing fluid communication between a third input source and the third transmitter input passage of second header shaft and between a fourth input source and the fourth transmitter input passage of the second header shaft, the manifold also providing communication between the third drain passage of the second header shaft and a drain vent and between the fourth drain passage of the second header shaft and the drain vent,
• the each set of rotary valves each being independently rotatable between two positions including
• a transmit position where the through passage of each valve provides communication between the transmitter input passage of its respective header shaft and their respective pressure transmitters and
• a drain position where the through passage of each valve is in communication with the drain passage of its respective header shaft,
• the second set of rotary valves each being independently rotatable between two positions including
• a transmit position where the second through passage of each valve of the second set of valves provides communication between the second transmitter input passage of the first header shaft and their respective pressure transmitters and
• a drain position where the second through passage of each valve of the second set of valves is in communication with the second drain passage of the first header shaft.