DIFFERENTIAL PRESSURE TRANSDUCER PROCESS MOUNTING SUPPORT

• US 3,817,283 A
• Filed: 05/30/1972
• Issued: 06/18/1974
• Est. Priority Date: 04/07/1971
• Status: Expired due to Term

• Current Assignee: John E. Hewson
• Original Assignee: John E. Hewson
• Inventors: Hewson, John E.
• Primary Examiner(s): Scott, Samuel
• Application Number:
  US05/258,019
• Time in Patent Office: 749 Days
• Field of Search: 137/608,270,271
• US Class Current: 137/884
• CPC Class Codes: F16K 27/00 Construction of housing methods for welding housings B23K; Use of materials therefor
• CPC Class Codes: F16K 37/00 Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
• CPC Class Codes: G01F 23/14 by measurement of pressure
• CPC Class Codes: G01L 19/0015 using switching means
• CPC Class Codes: Y10T 137/87885 Sectional block structure

Abstract

A mounting support serving as an interfacing connection between a process vessel or a valve or other fluid pressure transmitting structure connected to a process vessel and an instrument capable of sensing the differential pressure between the vapor-space pressure and the hydrostatic head pressure of fluid within the process vessel for the purpose of meansuring liquid level within the vessel. The mounting support in addition to providing structural support for the differential pressure sensing apparatus serves to transmit vapor pressure to the low side and hydrostatic head pressure to the high side of the differential pressure mechanism. The support may also be provided with a bypass passage between high and low pressure passages within the support for the purpose of establishing a balanced pressure condition between the low pressure and high pressure sides of the differential pressure sensing mechanism for the purpose of calibration, which bypass passage is provided with appropriate valve means to control fluid communication between the passages. The support includes orienting means to insure proper installation thereof.

Claims

1. A mounting support for supporting differential pressure sensing apparatus from the wall structure of a process vessel, said apparatus comprising a support body, first connection means defined at one extremity of said support body for establishing supporting connection of said support body to said vessel, second connection means defined at the opposite extremity of said support body, differential pressure sensing apparatus being secured to said second connection means, first pressure transmitting passage means extending through said body and terminating at each of said connection means, and communicating said differential pressure sensing apparatus with said process vessel, second fluid passage means extending through said support body and having one extremity terminating at said second connection means and having its other extremity terminating at the exterior of said support body.

2. A mounting support as recited in claim 1, an orienting member extending from said mounting support and cooperating with said differential pressure sensing apparatus in order to prevent improper assembly of said differential pressure sensing apparatus to said mounting support.

3. A mounting support as set forth in claim 1, said second fluid passage means comprising a plurality of interconnected pressure inlet passages each terminating at inlet connection apertures on different sides of said support body, whereby said mounting support may be oriented in any desired manner and connection may be made between a low pressure supply conduit and a selected one of saiD inlet passages and the remaining ones of said inlet passages may be plugged.

4. A mounting support as recited in claim 1, a pressure balancing passage formed in said support body and interconnecting said first and second passage means, said support body having a controllable valve for controlling pressure communication through said pressure balancing passage.

5. A mounting support as recited in claim 4, said support body having a controllable pressure inlet valve disposed in said first passage and being located ahead of of said controllable valve.

6. A mounting support for differential pressure sensing apparatus having high pressure and low pressure fluid pressure inlet means, said support comprising a support body, first integral connection means at one extremity of said support body for supporting connection of said support body to the lower wall structure of a process vessel, second integral connection means at the other extremity of said support body for establishing connection between said mounting support and said differential pressure sensing apparatus and defining a connection surface whereby said differential pressure sensing apparatus will be solely supported in connection with said pressure transmitting apparatus by said mounting support, a high range pressure transmitting passage extending through said support body and terminating at said connection surface and at said first connection means, a low range pressure transmitting passage extending through said support body and terminating at said connection surface and at the exterior of said support body, means establishing a fluid seal between said connecting surface and said pressure sensing apparatus about each of said passages.

7. A mounting support as set forth in claim 6, orienting means cooperating with structure on said differential pressure sensing apparatus to properly orient said differential pressure sensing apparatus relative to said mounting support.

8. A mounting support as set forth in claim 7, said orienting means comprising an elongated rib extending in non-centered relation from said mounting support beyond said connection surface, said elongated rib being received within off-center depression means defined by said differential pressure sensing apparatus only in the properly oriented relation thereof.

9. A mounting support as set forth in claim 6, a pressure balancing passage formed in said mounting support and establishing fluid communication between said high range and low range pressure transmitting passages, said mounting support having a controllable balancing valve means controlling pressure communication between said high pressure and low pressure fluid passages.

10. A mounting support as set forth in claim 9, said mounting adaptor having a pressure inlet valve disposed in said high range pressure passage upstream of said balancing valve for isolation of said passages from said high pressure.

11. A mounting support for supporting differential pressure sensing apparatus from the wall structure of a process vessel, said support comprising a support body, connection means and connection flange means formed integrally with said support body at opposite extremities thereof, said connection means being adapted for connection to the wall structure of said process vessel, said connection flange means being adapted for connection to said differential pressure sensing apparatus whereby said support body completely supports said sensing apparatus from said process vessel, said connection flange means defining a connection surface, a high range pressure transmitting passage extending through said support body and terminating at one extremity at said connection means and terminating at the other extremity at said connection surface in off-center relation, low range pressure transmitting passage means extending through said body and terminating at one extremity thereof at said connection surface and terminating at the other extremity thereof at connection aperture means lOcated at the exterior of said support body, means establishing pressure seals between said differential pressure sensing apparatus and about said low and high range pressure transmitting passages.

12. A mounting support as set forth in claim 11, orienting means extending from said mounting support and cooperating with structure on said differential pressure sensing apparatus to prevent improper assembly of said differential pressure sensing apparatus to said mounting support.

13. A mounting support as recited in claim 11, said low pressure passage means comprising a plurality of interconnected passages each terminating at connection apertures on different sides of said support body, whereby said mounting support may be oriented in any desired manner and connection may be made between a low pressure supply conduit and a selected one of the interconnected passages and the remaining ones of the interconnected passages may be plugged.

14. In combination;

a vessel having a wall structure, a high pressure aperture formed in the lower portion of said wall structure and a low pressure aperture being defined in the upper portion of said vessel, connection means being defined in said wall structure about said high pressure aperture, a mounting support, first and second connection means being defined on said support, said first connection means being received by said connection means of said vessel and securing said support in assembly with said vessel, differential pressure sensing apparatus being secured to said second connection means and being solely supported by said mounting support, said differential pressure sensing apparatus having a high pressure chamber and a low pressure chamber, first pressure transmittinG passage means being defined in said mounting support and communicating said high pressure aperture with said high pressure chamber, second pressure transmitting passage means being defined in said mounting support and having one extremity thereof disposed in communication with said low pressure chamber and the other extremity thereof terminating at a low pressure connection aperture defined exteriorly of said support, means communicating said low pressure connection aperture of said support, with said low pressure connection aperture of said vessel.

15. The combination of claim 14, a purge passage being defined in said mounting support and intersecting said first pressure passage means, means communicating said purge passage with a source of purging fluid.

16. The combination of claim 14, a pressure balancing passage being formed in said mounting support and communicating said first and second pressure passage means, valve means carried by said mounting support and controlling pressure communication between said first and second passage means.

17. The combination Of claim 16, inlet valve means being carried by said mounting support and controlling communication of pressure from said high pressure aperture of said vessel to said differential pressure sensing apparatus.