Coke drum deheading device
First Claim
1. An unheading device for removing a bottom head from a flange on a lower end of a coke drum, comprising:
- a car horizontally movable into and from position below the bottom head;
a vertically adjustable bottom head support member mounted on the car;
a bearing plate pivotably mounted at an upper end of thesupport member for engaging a lower surface of the bottom head;
a retractable arm having first and second sections hingedly connected at one end and having respective opposite ends secured to the bearing plate and the support member for pivoting the bearing plate and bottom head supported thereon with respect to horizontal;
a plurality of spring-biased wheels for rollably supporting the car on a surface;
a plurality of lugs for engaging a bearing surface for supporting the car thereon to avoid overloading the wheels when the car descends in reaction to a load on the car;
a car-mounted chute operative with the support member, bearing plate, retractable arm and bottom head to receive and direct material falling through the flange from the coke drum to an opening in a floor below the coke drum.
1 Assignment
0 Petitions
Accused Products
Abstract
A vessel unheading device and method especially suited to handle shot coke produced in a delayed coker unit of a petroleum refining process. The device includes a car having mounted thereon one or more bottom head retracting support members which can be laterally positioned below the head assembly. The support member includes a vertically retractable member suitable for elevating a bearing plate mounted at an upper end thereof into pivotable load bearing engagement with the head, and a horizontally retractable member having one end attached to the bearing plate and another end attached to the vertically retractable member for applying a pivot force. Shot coke or other debris is captured from the opened vessel by a mobile chute wheeled into position adjacent the unheading car. Following complete retraction, the head is transported to a remote location for maintenance.
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Citations
12 Claims
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1. An unheading device for removing a bottom head from a flange on a lower end of a coke drum, comprising:
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a car horizontally movable into and from position below the bottom head; a vertically adjustable bottom head support member mounted on the car;
a bearing plate pivotably mounted at an upper end of thesupport member for engaging a lower surface of the bottom head; a retractable arm having first and second sections hingedly connected at one end and having respective opposite ends secured to the bearing plate and the support member for pivoting the bearing plate and bottom head supported thereon with respect to horizontal; a plurality of spring-biased wheels for rollably supporting the car on a surface; a plurality of lugs for engaging a bearing surface for supporting the car thereon to avoid overloading the wheels when the car descends in reaction to a load on the car; a car-mounted chute operative with the support member, bearing plate, retractable arm and bottom head to receive and direct material falling through the flange from the coke drum to an opening in a floor below the coke drum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification