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CN-224202274-U - Tube plate structure for heat exchanger and winding tube type heat exchanger

CN224202274UCN 224202274 UCN224202274 UCN 224202274UCN-224202274-U

Abstract

The utility model relates to a tube plate structure for a heat exchanger and a wound tube type heat exchanger, wherein the tube plate structure comprises a tube plate body capable of conducting heat, a ring-shaped retainer ring and a winding tube type heat exchanger, wherein the tube plate body is provided with a first plate surface for facing an inner tube path medium of the heat exchanger and a second plate surface for facing the inner tube path medium of the heat exchanger, a plurality of tube holes penetrating through the first plate surface and the second plate surface are formed in the tube plate body at intervals, the second plate surface of the tube plate body is provided with a circumferentially extending annular groove, the annular groove is positioned at the periphery of each tube hole, the tube plate structure further comprises a ring-shaped retainer ring which is circumferentially arranged in the annular groove so as to cover a notch of the annular groove, through holes for allowing shell side mediums to enter the annular groove or/and gaps for allowing the shell side mediums to enter the annular groove are formed between the periphery of the retainer ring and the corresponding inner walls of the notch at intervals. The tube plate structure can bear larger temperature difference between tube side medium and shell side medium.

Inventors

  • CUI JIAOYUE
  • WANG JIANLIANG
  • HU XINGMIAO
  • REN HONGLIANG
  • LIU FUSHUANG

Assignees

  • 镇海石化建安工程股份有限公司

Dates

Publication Date
20260505
Application Date
20250528

Claims (10)

  1. 1. A tube sheet structure for a heat exchanger, comprising: The heat-conducting tube plate body (1) is provided with a first plate surface (11) for facing the inner tube path medium of the heat exchanger and a second plate surface (12) for facing the inner tube path medium of the heat exchanger, and a plurality of tube holes (10) penetrating through the first plate surface (11) and the second plate surface (12) are formed in the tube plate body (1) at intervals; The method is characterized in that: A second plate surface (12) of the tube plate main body (1) is provided with a circumferential extending annular groove (120), and the annular groove (120) is positioned at the periphery of each tube hole (10); The tube plate structure also comprises: The annular retainer ring (2) is circumferentially arranged in the annular groove (120) so as to cover the notch of the annular groove (120), and the retainer ring (2) is provided with through holes (20) for the shell side medium to enter the annular groove (120), or/and gaps (21) for the shell side medium to enter the annular groove (120) are formed by being arranged between the periphery of the retainer ring (2) and the corresponding inner wall of the notch at intervals.
  2. 2. Tube sheet structure according to claim 1, characterized in that the collar (2) has an inner peripheral edge (2 a), an outer peripheral edge (2 b); The inner side peripheral edge (2 a) is connected with the corresponding inner wall of the notch, the outer side peripheral edge (2 b) is arranged with the corresponding inner wall of the notch at intervals to form the gap (21), or the inner side peripheral edge (2 a) is arranged with the corresponding inner wall of the notch at intervals to form the gap (21), and the outer side peripheral edge (2 b) is connected with the corresponding inner wall of the notch.
  3. 3. The tube plate structure according to claim 2, wherein at least two check rings (2) are arranged at intervals along the axial direction, and the two adjacent check rings (2) are a first check ring (201) and a second check ring (202), an outer side peripheral edge (2 b) of the first check ring (201) is connected with a corresponding inner wall of the notch, an inner side peripheral edge (2 a) of the first check ring (201) is arranged at intervals with the corresponding inner wall of the notch to form the gap (21), an inner side peripheral edge (2 a) of the second check ring (202) is connected with the corresponding inner wall of the notch, and an outer side peripheral edge (2 b) of the second check ring (202) is arranged at intervals with the corresponding inner wall of the notch to form the gap (21).
  4. 4. The tube sheet structure according to claim 1 to 3, wherein the second plate surface (12) of the tube sheet body (1) has a central portion (121) with the tube holes (10), the annular groove (120) located at the periphery of the central portion (121), and an outer ring portion (122) located at the periphery of the annular groove (120).
  5. 5. A wound tube heat exchanger comprising: A horizontal shell-side cylinder body (3), the side wall of which is provided with a shell-side connecting pipe (31) for passing a shell-side medium; A plurality of heat exchange tubes (4) which are axially arranged in the shell-side cylinder body (3) and are spirally wound into a plurality of layers of spiral pipes from inside to outside, The tube plate structure as claimed in claim 4 is characterized in that the tube plate main body (1) is arranged in a manner that the second plate surface (12) faces the shell side cylinder (3) and the outer ring part (122) on the second plate surface (12) is in butt joint with the end part of the shell side cylinder (3), and the tube holes (10) on the tube plate main body (1) are used for supporting the end parts of the corresponding heat exchange tubes (4).
  6. 6. The coiled tube heat exchanger according to claim 5, further comprising a sleeve (5) having a side peripheral wall fitted around the outer periphery of the outermost spiral tube, wherein the end of the side peripheral wall is spaced from a central portion (121) of the second plate surface (12) of the corresponding tube sheet body (1), and wherein the end of the side peripheral wall is spaced from the inner wall surface of the corresponding shell-side tube body (3) to form an annular cavity (30) communicating with the shell-side connection tube (31).
  7. 7. The coiled tube heat exchanger according to claim 6, further comprising an annular support plate (6) circumferentially arranged in the annular cavity (30), wherein an inner periphery of the annular support plate (6) is connected with a side peripheral wall of the sleeve (5), an outer periphery of the annular support plate (6) is supported on a side wall of the shell side cylinder (3), and a plurality of holes (60) are circumferentially distributed on the annular support plate (6) at intervals.
  8. 8. A coiled tube heat exchanger according to claim 7, wherein at least two axially extending slideways (32) are circumferentially arranged on the inner wall surface of the side wall of the shell side cylinder (3) at intervals, and the outer periphery of the annular supporting plate (6) is supported on the slideways (32).
  9. 9. The wound tube heat exchanger according to claim 7, wherein the shell-side connection tube (31) is provided at the top of the shell-side cylinder (3), the aperture of the opening (60) provided at the upper side portion of the annular support plate (6) is smaller than the aperture of the opening (60) provided at the lower side portion of the annular support plate (6), and the interval between the adjacent openings (60) provided at the upper side portion of the annular support plate (6) is larger than the interval between the adjacent openings (60) provided at the lower side portion of the annular support plate (6).
  10. 10. A coiled tube heat exchanger according to claim 5, characterized in that the bottom and the top of the collar (2) are provided with the above mentioned through holes (20).

Description

Tube plate structure for heat exchanger and winding tube type heat exchanger Technical Field The utility model belongs to the technical field of heat exchangers, and particularly relates to a tube plate structure for a heat exchanger and a winding tube type heat exchanger. Background The prior winding tube type heat exchanger such as the structure disclosed in the Chinese patent application No. CN201910358285.9, which is a winding tube type heat exchanger for gas absorption (issued publication No. CN 109999619B), the Chinese patent application No. CN202021024668.7, which is a lower tube plate anti-corrosion structure of the winding tube type heat exchanger (issued publication No. CN 212645484U) and the like, generally comprises a shell side cylinder body with shell side connecting tubes, tube plates welded at two ends of the shell side cylinder body, heat exchange tubes spirally wound in the shell side cylinder body along the axial direction and respectively supported on the tube plates at two ends, and tube boxes with the tube side connecting tubes arranged on the tube plates. When in heat exchange, shell side medium enters the shell side cylinder body through the shell side connecting pipe and exchanges heat with tube side medium in the heat exchange tube. In actual use, under a high-temperature environment, the temperature difference between the tube side medium and the shell side medium is larger (more than or equal to 100 ℃), for example, the temperature of the tube side medium is 730 ℃, the temperature of the shell side medium is 610 ℃, at this time, the temperature difference between the tube side medium on one side of the tube plate and the shell side medium on the other side of the tube plate is larger, so that the temperature difference stress at the tube plate is larger, and the service life of the tube plate is influenced. Disclosure of utility model The first technical problem to be solved by the present utility model is to provide a tube plate structure for a heat exchanger, which can bear a larger temperature difference between a tube side medium and a shell side medium. The second technical problem to be solved by the utility model is to provide a winding tube type heat exchanger with the tube plate structure. The utility model solves the first technical problem by adopting a technical scheme that a tube plate structure for a heat exchanger comprises: The heat-conducting tube plate body is provided with a first plate surface for facing the inner tube path medium of the heat exchanger and a second plate surface for facing the inner tube path medium of the heat exchanger, and a plurality of tube holes penetrating through the first plate surface and the second plate surface are formed in the tube plate body at intervals; The method is characterized in that: The second plate surface of the tube plate body is provided with a circumferentially extending annular groove, and the annular groove is positioned at the periphery of each tube hole; The tube plate structure also comprises: The annular check ring is circumferentially arranged in the annular groove so as to cover the notch of the annular groove, and is provided with through holes for the shell side medium to enter the annular groove, or/and gaps for the shell side medium to enter the annular groove are formed by being arranged between the periphery of the check ring and the corresponding inner wall of the notch at intervals. The annular groove and the retainer ring are arranged on the second plate surface of the tube plate main body, so that part of shell side medium can enter the annular groove through the through holes or/and the gaps on the retainer ring, the shell side medium entering the annular groove basically does not flow or enters the annular groove at a slower speed due to the shielding of the retainer ring, the shell side medium in the annular groove is gradually heated to the temperature close to that of the shell side medium on the first plate surface under the heat effect of the tube side medium on the first plate surface, and the temperature difference of two sides of the tube plate main body is reduced, so that the temperature difference stress at the tube plate is reduced. Preferably, the collar has an inner peripheral edge and an outer peripheral edge; The inner side periphery is connected with the corresponding inner wall of the notch, the outer side periphery is arranged with the corresponding inner wall of the notch at intervals to form the gap, or the inner side periphery is arranged with the corresponding inner wall of the notch at intervals to form the gap, and the outer side periphery is connected with the corresponding inner wall of the notch. In order to further reduce the temperature difference between two sides of the tube plate main body, preferably, at least two check rings are arranged at intervals along the axial direction side by side, and the two adjacent check rings are a first check ring and a second che