阅读说明：本技术 现场装置界面密封和电绝缘 (Field device interface sealing and electrical insulation ) 是由 安德鲁·约翰·瓦格纳 特雷弗·托马斯·施特罗特 莎拉·艾伦·拉克鲁瓦 于 2018-09-27 设计创作，主要内容包括：现场装置组件包括工业过程现场装置、法兰以及密封电绝缘系统。现场装置包括压力传感器和包含有源部件的壳体。壳体包括具有基部界面的基部,基部界面包括第一基部过程开口。法兰附接到壳体的基部上,并包括具有第一法兰过程开口的共面界面。密封电绝缘系统包括垫圈,垫圈包括介电材料。垫圈中的第一过程开口与第一基部过程开口和第一法兰过程开口对准。垫圈的第一表面与基部界面接合,并且垫圈的与第一表面相反的第二表面与共面界面接合。垫圈使现场装置的壳体与法兰电绝缘。(The field device assembly includes an industrial process field device, a flange, and a sealed electrical isolation system. The field device includes a pressure sensor and a housing containing active components. The housing includes a base having a base interface including a first base process opening. The flange is attached to the base of the housing and includes a coplanar interface with a first flange process opening. The sealed electrical insulation system includes a gasket comprising a dielectric material. The first process opening in the gasket is aligned with the first base process opening and the first flange process opening. A first surface of the gasket interfaces with the base, and a second surface of the gasket opposite the first surface interfaces with the coplanar surface. The gasket electrically insulates the housing of the field device from the flange.)

1. A field device assembly for an industrial process, comprising:

an industrial process field device, comprising:

a pressure sensor; and

a housing containing a pressure sensor and including a base interface having a first base process opening;

a flange attached to the base of the housing and including a coplanar interface with a first flange process opening; and

a sealed electrical insulation system including a gasket comprising a dielectric material and including a first gasket process opening aligned with the first base process opening and the first flange process opening, a first surface interfacing with the base, a second surface interfacing with the coplanar interface opposite the first surface; and is

Wherein the gasket electrically insulates the housing of the field device from the flange.

2. The field device assembly of claim 1, wherein:

the sealed electrical insulation system includes a first O-ring engaging a first surface of the gasket to surround the first gasket process opening and engaging the base interface to surround the first base process opening; and is

The O-ring and gasket form a first sealing channel between the coplanar interface and the base interface and through the first flange process opening, the first gasket process opening, the first O-ring, and the first base process opening.

3. The field device assembly of claim 2, wherein:

the gasket includes a first annular protrusion extending from the second surface, surrounding the first gasket process opening, and engaging the coplanar interface to surround the first flange process opening.

4. The field device assembly of claim 3, wherein:

the thickness of the gasket at the first annular protrusion is thicker than the thickness of a portion of the gasket surrounding the first annular protrusion.

5. The field device assembly of claim 4, wherein:

the thickness of the gasket at the first annular protrusion is about 10% -22% thicker than the thickness of the portion of the gasket surrounding the first annular protrusion.

6. The field device assembly of claim 1, wherein:

the base interface includes a second base process opening;

the coplanar interface includes a second flange process opening; and is

The gasket includes a second gasket process opening aligned with the second base process opening and the second flange process opening.

7. The field device assembly of claim 6, wherein:

a sealed electrical insulation system comprising:

a first O-ring engaging a first surface of the gasket to surround the first gasket process opening and engaging the base interface to surround the first base process opening; and

a second O-ring engaging the first surface of the gasket to surround the second gasket process opening and engaging the base interface to surround the second base process opening;

the first O-ring and gasket forming a first sealing channel between the coplanar interface and the base interface and through the first flange process opening, the first gasket process opening, the first O-ring, and the first base process opening; and

the second O-ring and gasket form a second sealing channel between the coplanar interface and the base interface and through the second flange process opening, the second gasket process opening, the second O-ring, and the second base process opening.

8. The field device assembly of claim 7, wherein:

the gasket includes:

a first annular protrusion extending from the second surface, surrounding the first gasket process opening, and engaging the coplanar interface to surround the first flange process opening; and

a second annular protrusion extending from the second surface, surrounding the second gasket process opening, and engaging the coplanar interface to surround the second flange process opening.

9. The field device assembly of claim 8, wherein:

the thickness of the gasket at the first and second annular protrusions is thicker than the thickness of a portion of the gasket surrounding the first and second annular protrusions.

10. The field device assembly of claim 9, wherein:

the thickness of the gasket at the first and second annular protrusions is about 10% -22% thicker than the thickness of the portion of the gasket surrounding the first and second annular protrusions.

11. The field device assembly of claim 10, wherein:

the first surface of the gasket is substantially flat.

12. The field device assembly of claim 11, wherein:

the thickness of the gasket is substantially uniform except at the first and second protrusions.

13. The field device assembly of claim 12, wherein:

the washer includes four bolt openings.

14. The system of claim 13, wherein:

each of the first and second gasket process openings is circular and has a diameter of about 1.0 inch;

the first gasket process opening and the second gasket process opening are separated by a distance of about 0.30 inches;

the width of the gasket is about 2.40 inches; and is

The length of the gasket is about 2.90 inches.

15. A field device assembly for an industrial process, comprising:

an industrial process field device, comprising:

a pressure sensor; and

a housing containing a pressure sensor and including a base interface having a first base process opening and a second base process opening;

a flange attached to the base of the housing and including a coplanar interface having a first flange process opening and a second flange process opening; and

a sealed electrical insulation system, the sealed electrical insulation system comprising:

a gasket comprising a dielectric material, a first gasket process opening aligned with the first base process opening and the first flange process opening, a second gasket process opening aligned with the second base process opening and the second flange process opening, a first surface interfacing with the base, a second surface opposite the first surface and interfacing with a common surface, wherein the gasket electrically insulates the housing of the field device from the flange;

a first O-ring engaging a first surface of the gasket to surround the first gasket process opening and engaging the base interface to surround the first base process opening; and

a second O-ring engaging the first surface of the gasket to surround the second gasket process opening and engaging the base interface to surround the second base process opening.

16. The field device assembly of claim 15, wherein:

the gasket includes:

a first annular protrusion extending from the second surface, surrounding the first gasket process opening, and engaging the coplanar interface to surround the first flange process opening; and

a second annular protrusion extending from the second surface, surrounding the second gasket process opening, and engaging the coplanar interface to surround the second flange process opening.

17. The field device assembly of claim 16, wherein:

the thickness of the gasket at the first and second annular protrusions is thicker than the thickness of a portion of the gasket surrounding the first and second annular protrusions.

18. The field device assembly of claim 17, wherein:

the washer includes four bolt openings.

19. The system of claim 18, wherein:

each of the first and second gasket process openings is circular and has a diameter of about 1.0 inch;

the first gasket process opening and the second gasket process opening are separated by a distance of about 0.30 inches;

the width of the gasket is about 2.40 inches; and is

The length of the gasket is about 2.90 inches.

20. A method of sealing a fluid channel between a coplanar interface of a flange and a base interface of a field device for an industrial process and electrically insulating the field device from the flange using a sealed electrical insulation system comprising:

a gasket comprising a dielectric material, the gasket having a first gasket process opening, a first surface, a second surface opposite the first surface, and a first annular protrusion extending from the second surface and surrounding the first gasket process opening; and

a first O-ring engaging a first surface of the gasket to surround the first gasket process opening;

the method comprises the following steps:

engaging the first annular protrusion with the coplanar interface to surround the first flange process opening;

interfacing an O-ring with the base to surround the first base process opening;

electrically isolating the field device from the flange using a gasket; and

forming a first sealing channel between the coplanar interface and the base interface and through the first flange process opening, the first gasket process opening, the O-ring, and the first base process opening includes compressing the O-ring and the gasket between the base interface and the coplanar interface.