一种具有应力可调装置的进料加热器
The design of the floating head assembly and the fixed assembly solves the problem of thermal stress caused by thermal expansion and contraction of the heat exchange tubes, extending their service life and improving sealing performance and maintenance efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI NANDA SPECIAL PETROCHEMICAL EQUIP PARTS CO LTD
- Filing Date
- 2025-08-28
- Publication Date
- 2026-07-17
AI Technical Summary
In traditional shell-and-tube heat exchangers, the thermal stress generated by the thermal expansion and contraction of the heat exchange tubes cannot be released, leading to tube bending, deformation, or even breakage, thus reducing the service life.
Employing a floating head assembly and a fixed assembly, the floating head tube sheet and floating head cover plate move freely within the shell assembly, releasing thermal stress, and the design of hook rings and connecting rings improves sealing performance and ease of maintenance.
It effectively releases thermal stress, extends the service life of heat exchange tubes, improves maintenance convenience, reduces the risk of fluid leakage, and shortens replacement time.
Smart Images
Figure CN224517499U_ABST
Abstract
Claims
1. A feed heater with stress adjustment means comprising a shell assembly (1), characterized in that, One end of the shell assembly (1) is fixedly provided with a fixed tube sheet (2), and the other end is provided with a floating head assembly (4). The floating head assembly (4) includes a floating head tube sheet (41) and a floating head cover plate (42) movably disposed in the shell assembly (1). Multiple heat exchange tubes (5) are disposed between the floating head tube sheet (41) and the fixed tube sheet (2). The floating head cover plate (42) is used to seal the tube-side fluid and the shell-side fluid.
2. A feed heater with stress adjustment means according to claim 1, characterized in that The floating head assembly (4) also includes two hook rings (43) disposed in the housing assembly (1). The two hook rings (43) are arranged in a circle and sleeved on the outer surface of the floating head tube plate (41). The two hook rings (43) are detachably connected to the floating head cover plate (42) by a fixing assembly (6).
3. A feed heater having a stress adjustment device according to claim 2, characterized in that The fixing component (6) includes a connecting ring (61) sleeved on the outer periphery of the floating head cover plate (42). Both the connecting ring (61) and the hook ring (43) are provided with a plurality of first connecting holes (611). Each first connecting hole (611) is provided with a first stud (62). The two opposite ends of the first stud (62) are threaded with a first nut (63). The two first nuts (63) respectively abut against the outer surfaces of the hook ring (43) and the connecting ring (61).
4. A feed heater with a stress-adjustable device according to claim 2, characterized in that, Each hook ring (43) has a protrusion (431) at both opposite ends. Two adjacent protrusions (431) overlap and fit together. Each protrusion (431) has a insertion hole (7). A pin (71) is inserted into the insertion hole (7). The pin (71) is interference-fitted into the insertion hole (7).
5. A feed heater having a stress adjustment device according to claim 3, wherein The end of the floating head tube plate (41) facing the floating head cover plate (42) is provided with a first sealing ring (411), and the connecting ring (61) is provided with a first sealing groove (421) that cooperates with the first sealing ring (411). The first sealing ring (411) abuts against the inner side wall of the first sealing groove (421).
6. A feed heater having a stress adjustment device according to claim 1, wherein The housing assembly (1) includes a pipe body (101), an upper pipe box (102) and a lower pipe box (103). The lower pipe box (103) is detachably connected to the pipe body (101) via a connecting flange (3). The fixed pipe plate (2) and the upper pipe box (102) are detachably connected to the pipe body (101) via a connecting assembly (8).
7. A feed heater having a stress adjustment device according to claim 6, characterized in that The connecting assembly (8) includes a first flange (81) disposed on the upper pipe box (102), a second flange (82) disposed at the end of the pipe body (101), and a third flange (83) disposed on the outer end face of the fixed pipe plate (2). The first flange (81), the second flange (82) and the third flange (83) are each provided with a plurality of second connecting holes (811). A second stud (84) is inserted into each second connecting hole (811). A second nut (85) is threaded to each of the opposite ends of the second stud (84). The two second nuts (85) abut against the outer surfaces of the first flange (81) and the second flange (82) respectively.
8. A feed heater having a stress adjustment device according to claim 7, characterized in that The opposite end faces of the fixed tube sheet (2) are embedded with second sealing rings (9), the first flange plate (81) and the second flange plate (82) are provided with second sealing grooves (812) matched with the second sealing rings (9), and the second sealing rings (9) abut on the inner side walls of the second sealing grooves (812).