US3833055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell and tube heat exchanger
Assignee: Union Carbide Corp
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Filing: 1972-07-24
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Granted: 1974-09-03
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Expires: 1992-07-24
Abstract
Abstract A shell and tube heat exchanger having a cylindrical shell and carbonaceous tubes held in place by a pair of carbonaceous tube sheets. According to the present invention, a fixed tube sheet is used at one end and a floating tube sheet is used at the opposite end. The floating tube sheet is located entirely outside of the shell and is axially spaced from the end thereof by an elongated metal skirt extending from within the shell into contact with the carbonaceous floating tube sheet. In addition, a packing material is used for sealing while also permitting sliding motion of the metal skirt. The metal skirt is held tightly in contact with the floating tube sheet by clamping means.
Inventors
- 👤 F Munz
- 👤 R Naidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0236; F28F9/0239; F28F21/00; F28F21/02; F28F9/22; F28F2009/222; F28F2009/226; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/053; Y10S165/054; Y10S165/055; Y10S165/056
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
166 words
In a shell and tube heat exchanger having a cylindrical outer shell and carbonaceous inner tubes held in place and separated by carbonaceous tube sheets, one of said tube sheets being a floating vertical member tube sheet, adapted to slide axially with respect to the shell, the improvement comprising: a. the floating tube sheet located entirely outside of the shell and axially spaced from the end thereof by an elongated cylindrical metal skirt extending axially from within the shell and into contact with only the tube side of the tube sheet; b. packing material sealing and allowing sliding motion between the inside wall of the shell and the outside wall of the cylindrical metal skirt; and c. clamping means including an ejnclosing metal cover of said heat exchanger for tightly holding the skirt in contact with the floating tube sheet, said metal cover being secured to said metal skirt whereby the floating tube sheet and skirt can float axially as a unit within said packing material.
Claim 2
Dependent Claim
166 words
In a shell and tube heat exchanger having a cylindrical outer shell and carbonaceous inner tubes held in place and separated by carbonaceous tube sheets, one of said tube sheets being a floating vertical member tube sheet, adapted to slide axially with respect to the shell, the improvement comprising: a. the floating tube sheet located entirely outside of the shell and axially spaced from the end thereof by an elongated cylindrical metal skirt extending axially from within the shell and into contact with only the tube side of the tube sheet; b. packing material sealing and allowing sliding motion between the inside wall of the shell and the outside wall of the cylindrical metal skirt; and c. clamping means including an ejnclosing metal cover of said heat exchanger for tightly holding the skirt in contact with the floating tube sheet, said metal cover being secured to said metal skirt whereby the floating tube sheet and skirt can float axially as a unit within said packing material.
Claim 3
Dependent Claim
31 words
The apparatus as defined in claim 1 further including a gasket seal outside of the exchanger shell between the contacting surfaces of the floating tube sheet and the elongated metal skirt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |