Pressure transmitter with high pressure isolator mounting assembly
First Claim
1. A transmitter connectable to a process line and providing an output responsive to a pressure in the process line, the transmitter comprising:
- a housing forming a wall around a hole extending into an interior cavity formed in the housing;
a sensor for sensing the pressure;
a circuit coupled to the sensor and providing the output; and
an isolating assembly mounted in the hole isolating fluid in the process line from the interior cavity, the isolating assembly comprising;
an isolator plug insertable into a process fluid passage and joined to the housing, the isolator plug having first and second spaced end surfaces, the first end surface forming a process fluid pressure surface and, having a diaphragm coupling the pressure via a passageway to a distal end of the plug;
a header assembly joined to the second end surface of the plug to form a sensor cavity holding the sensor and receiving the pressure from the passageway;
a first connection between the header assembly and the second end surface of the plug to secure the header assembly to the plug;
a second connection between the header assembly and the second end surface of the plug to secure the header assembly to the plug;
the header assembly including a header and a ring member joined to the header, the first connection being formed on the header and the second connection being formed on the ring member to secure the header assembly to the plug.
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Accused Products
Abstract
A pressure transmitter includes an isolator mounting assembly for isolating process fluid from an interior cavity of the pressure transmitter. The isolator mounting assembly includes an isolator plug for receiving the process fluid line pressure and coupling the line pressure to a sensor cavity formed by a header joined to a distal end of the plug. A ring member is attached to the header and the distal end of the plug to reinforce the joint formed between the isolator plug and the head. In another embodiment, the isolator mounting assembly includes a base and a support having first and second opposed ends. The first end is rigidly bonded to the pressure sensor while an epoxy joint joins the second end of the support to the base.
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Citations
31 Claims
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1. A transmitter connectable to a process line and providing an output responsive to a pressure in the process line, the transmitter comprising:
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a housing forming a wall around a hole extending into an interior cavity formed in the housing; a sensor for sensing the pressure; a circuit coupled to the sensor and providing the output; and an isolating assembly mounted in the hole isolating fluid in the process line from the interior cavity, the isolating assembly comprising; an isolator plug insertable into a process fluid passage and joined to the housing, the isolator plug having first and second spaced end surfaces, the first end surface forming a process fluid pressure surface and, having a diaphragm coupling the pressure via a passageway to a distal end of the plug; a header assembly joined to the second end surface of the plug to form a sensor cavity holding the sensor and receiving the pressure from the passageway; a first connection between the header assembly and the second end surface of the plug to secure the header assembly to the plug; a second connection between the header assembly and the second end surface of the plug to secure the header assembly to the plug; the header assembly including a header and a ring member joined to the header, the first connection being formed on the header and the second connection being formed on the ring member to secure the header assembly to the plug. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A transmitter connectable to a process line and providing an output responsive to a process pressure in the process line with respect to atmospheric pressure, the transmitter comprising:
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a housing forming an inner wall around a hole extending into an interior cavity formed in the housing; a sensor for sensing the pressure; a circuit coupled to the sensor and providing the output; an isolator plug disposed in the hole having;
a diaphragm therein coupling the process pressure via a first passageway to a distal end of the plug; and
a second passageway extending from a first surface to a second surface for carrying atmospheric pressure to the sensor. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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12. A transmitter connectable to a process line and providing an output responsive to a pressure in the process line, the transmitter comprising:
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a housing forming a wall around a hole extending into an interior cavity formed in the housing; an isolating assembly mounted in the hole isolating fluid in the process line from the interior cavity, the isolating assembly comprising; an isolator plug, the isolator plug having a diaphragm for receiving the pressure; a connector having a bore extending between first and second spaced ends of the connector; the isolator plug including first and second plug portions, the first plug portion including a first outer surface having a first outer dimension sized for insertion into the hole formed in the housing and engagement with the wall surrounding the hole; and the second plug portion including a second outer surface having a second outer dimension sized smaller than the first outer dimension for insertion into the bore of the connector; and the isolator plug including a stepped surface between the first and second plug portions, the stepped surface having a first mating surface surrounding a first groove, the connector having a second mating surface surrounding a second groove, the connector being disposed such that the first and second grooves open to each other; and an annular weld joining the first mating surface to the second mating surface.
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23. A transmitter connectable to a process line and providing an output responsive to a pressure in the process line, the transmitter comprising:
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a housing forming an inner wall around a hole extending into an interior cavity formed in the housing; an isolator plug, the isolator plug having a diaphragm therein coupling the pressure via a passageway from a diaphragm end to a sensor end thereof; a connector having a bore extending from a first end to a second end; the isolator plug including; first and second plug portions, the first plug portion including a first outer surface having a first outer dimension sized for insertion into the hole formed in the housing and engagement with the wall surrounding the hole, and the second plug portion including a second outer surface having a second outer dimension sized smaller than the first outer dimension for insertion into the bore of the connector; and a stepped surface between the first and second portions; the connector connectable to the process line at the first end and secured to the stepped surface of the isolator plug at the second end; an annular weld securing the isolator plug to the connector; a sensor for sensing the pressure; and a circuit coupled to the sensor and providing the output. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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Specification