Tube sheet built-in structure and heat exchanger

Abstract

This utility model discloses an internal tube sheet structure and a swirl-wound tube heat exchanger, belonging to the technical field of heat exchangers, and the heat exchanger to which the internal tube sheet structure is applicable comprises a housing, which includes a tube sheet disposed inside the housing and not in direct contact with the housing. This utility model employs an internal tube sheet structure, in which the tube sheet is disposed inside the housing and is not directly connected to the housing, thereby reducing the longitudinal length of the equipment and the circumscribing dimension in the joint circumscribing direction.

Description

Technical Field

[0001] This Invention relates to the technical field of heat exchangers, and particularly to a tube sheet built-in structure and a swirling flow type coiled tube heat exchanger.

Background Art

[0002] Heat exchangers are widely applied in various industries of the national economy and are one of the most common facilities in the energy, petroleum, chemical industry, metallurgy, power, light industry, food, and even aerospace industries. It is an important facility for developing secondary energy and realizing energy consumption reduction through heat recovery. Currently, coiled tube heat exchangers are widely applied because they can realize simultaneous heat exchange of multiple fluids and have a high operating pressure. The tube sheets of conventional coiled tube heat exchangers are provided at both the upper and lower ends of the housing and are fixed to the housing, resulting in an increase in the longitudinal length of the entire device. Summary of the Invention

[0003] In view of the above problems, this Invention aims to provide a tube sheet built-in structure and a swirling flow type coiled tube heat exchanger equipped with this tube sheet built-in structure.

[0004] The specific technical solution is as follows.

[0005] A tube sheet built-in structure applicable to a heat exchanger, wherein the above heat exchanger comprises a housing, and includes a tube sheet provided inside the above housing and not directly contacting the above housing.

[0006] In the above tube sheet built-in structure, the above tube sheet includes a plate-like structure and a first annular structure integrally provided on the outer edge of the above plate-like structure, and the above first annular structure is provided on one side of the above plate-like structure. More preferably, the above tube sheet includes a second annular structure integrally provided at the central portion of the above plate-like structure. The above second annular structure is provided on the other side of the above plate-like structure. A groove is formed inside the above second annular structure. The end of the above second annular structure is characterized in that the distance from the bottom of the above groove is smaller than the distance from the end of the above second annular structure to the above plate-like structure.

[0007] In the above tube-sheet built-in structure, it includes a tubular structure that penetrates the above housing, one end of which is provided outside the above housing, and the other end of which is provided inside the above housing and is connected to the above tube sheet.

[0008] In the above tube-sheet built-in structure, the above tubular structure includes a tapered portion connected to the above tube sheet, a straight portion connected to the above tapered portion, and a connector connected to the above straight portion. Among them, the end with a relatively larger inner diameter of the above tapered portion is connected to the above tube sheet, and the end with a relatively smaller inner diameter of the above tapered portion is connected to the above straight portion. A more preferable feature is that at least a part of the above straight portion is provided outside the above housing, and at least a part of the above straight portion is provided inside the above housing. A more preferable feature is that the outer periphery of the above straight portion is fixedly connected to the above housing.

[0009] In the above tube-sheet built-in structure, the above tubular structure includes a first straight portion connected to the above tube sheet, a tapered portion connected to the above first straight portion, a second straight portion connected to the above tapered portion, and a connector connected to the above second straight portion. Among them, the inner diameter of the above first straight portion is larger than the inner diameter of the above second straight portion. A more preferable feature is that at least a part of the above first straight portion is provided outside the above housing, and at least a part of the above first straight portion is provided inside the above housing. A more preferable feature is that the outer periphery of the above-mentioned first straight portion is fixedly connected to the above-mentioned housing.

[0010] In the above-mentioned tube sheet built-in structure, the inner diameter of the above-mentioned first straight portion is provided to be constant, and the outer diameter of the above-mentioned first straight portion is provided with a variable diameter. A more preferable feature is that the outer diameter of the central portion of the above-mentioned first straight portion is larger than the outer diameters of both ends of the above-mentioned first straight portion. A more preferable feature is that between the central portion of the outer surface of the above-mentioned first straight portion and both ends of the outer surface of the above-mentioned first straight portion, both are connected by a tape portion.

[0011] In the above-mentioned tube sheet built-in structure, the above-mentioned heat exchanger includes a central cylinder, the above-mentioned tube sheet may be perpendicular to the axis of the above-mentioned central cylinder, the above-mentioned tube sheet may be parallel to the axis of the above-mentioned central cylinder, or an angle may be provided between the above-mentioned tube sheet and the axis of the above-mentioned central cylinder.

[0012] In the above-mentioned tube sheet built-in structure, the number of the above-mentioned tube sheets is determined according to actual needs.

[0013] In the above-mentioned tube sheet built-in structure, it further includes a support column with one end fixedly connected to the above-mentioned tube sheet and the other end fixedly provided.

[0014] In the above-mentioned tube sheet built-in structure, it includes a support column with one end rotatably connected to the above-mentioned tube sheet and the other end movable only in a first direction parallel to the plane where the above-mentioned tube sheet is located. Or, it includes a support column with one end rotatably connected to the above-mentioned tube sheet and the other end movable only in a second direction intersecting the plane where the above-mentioned tube sheet is located.

[0015] A more preferable feature is that the above-mentioned heat exchanger includes a central cylinder, the above-mentioned tube sheet is provided parallel to the axis of the above-mentioned central cylinder, one end of the above-mentioned support column is rotatably connected to the above-mentioned tube sheet, the other end of the above-mentioned support column is slidably connected to the above-mentioned central cylinder, and the other end of the above-mentioned support column is slidable along the outer surface of the above-mentioned central cylinder.

[0016] A swirling-flow coiled-tube heat exchanger including any one or more of the above-mentioned tube-sheet built-in structures.

[0017] The above heat exchanger is provided with a housing, and the above housing includes a cylindrical body and caps respectively provided at the upper end and the lower end of the above cylindrical body, and further includes therein A first tube sheet provided inside the above housing and located at the upper part of the above housing, A tapered portion connected to the above first tube sheet, a straight portion connected to the above tapered portion, and a connector connected to the above straight portion. Among them, one end with a relatively large inner diameter of the above tapered portion is connected to the above first tube sheet, one end with a relatively small inner diameter of the above tapered portion is connected to the above straight portion, at least a part of the above straight portion is provided outside the above housing, at least a part of the above straight portion is provided inside the above housing, and the outer periphery of the above straight portion is fixedly connected to the cap at the upper end of the above cylindrical body, a tubular structure A second tube sheet located at the lower end of the above housing and having an outer periphery fixedly connected to the above cap.

[0018] In the above swirling-flow coiled-tube heat exchanger, a shell stroke joint is provided on the cap at the upper end of the above cylindrical body, and another shell stroke joint is provided on the side surface of the above cylindrical body.

[0019] In the above swirling-flow coiled-tube heat exchanger, the above heat exchanger is provided with a housing, and the above housing includes a cylindrical body and caps respectively provided at the upper end and the lower end of the above cylindrical body, and further includes therein An upper plate provided inside the above housing, located at the upper part of the above housing, and provided horizontally, An upper tapered portion connected to the upper tube sheet, an upper straight portion connected to the upper tapered portion, and an upper connector connected to the upper straight portion. Among them, one end with a relatively large inner diameter of the upper tapered portion is connected to the upper tube sheet, one end with a relatively small inner diameter of the upper tapered portion is connected to the upper straight portion, at least a part of the upper straight portion is provided outside the housing, at least a part of the upper straight portion is provided inside the housing, and the outer periphery of the upper straight portion is fixedly connected to a top plate structure fixed to the cap at the upper end of the cylinder body. A side tube sheet provided inside the housing, located at the lower part of the housing, and vertically provided. A first straight portion on the side connected to the side tube sheet, a side tapered portion connected to the first straight portion on the side, a second straight portion on the side connected to the side tapered portion, and a side connector connected to the second straight portion on the side. Among them, the inner diameter of the first straight portion on the side is larger than the inner diameter of the second straight portion on the side. At least a part of the first straight portion on the side is provided outside the cylinder body, at least a part of the first straight portion on the side is provided inside the cylinder body, and the outer periphery of the first straight portion on the side includes a side tubular structure fixedly connected to the cylinder body.

[0020] In the above-mentioned swirling flow type coiled tube heat exchanger, a first shell stroke joint is provided on one side of the cap at the upper end of the cylinder body, and a second shell stroke joint is provided in the middle of the cap at the lower end of the cylinder body.

[0021] In the above-mentioned swirling flow type coiled tube heat exchanger, a first shell stroke joint is provided on one side of the cap at the upper end of the cylinder body, and a second shell stroke joint is provided on one side of the cap at the lower end of the cylinder body.

[0022] This Invention By adopting the above technology, the following positive effects can be obtained compared with the prior art. (1) ThisInvention Adopts a built-in tube sheet structure, arranges the tube sheet inside the housing, and does not directly connect the tube sheet to the housing, thereby reducing the longitudinal length of the equipment and the circumferential external dimension of the connecting pipe. (2) This Invention 's tube sheet structure is connected to the cap of the housing through a short joint and / or a connector, which is beneficial for making the cap opening smaller, drilling holes for reinforcement, and saving materials.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Explanation of Reference Numerals

[0024] 11, tube sheet; 111, plate-like structure; 112, first annular structure; 113, second annular structure; 114, plate-like structure; 2, housing; 21, cylinder; 22, cap; 3, tubular structure; 301, tapered portion; 302, straight portion; 303, connector; 311, first straight portion; 312, tapered portion; 313, second straight portion; 314, connector; 4, central cylinder; 5, support column; 61, first shell stroke joint; 62, second shell stroke joint. Specific Embodiments

[0025] Hereinafter, based on the drawings and specific examples, thisInvention will be further described. However, this Invention is not limited.

[0026] Figure 1 is a diagram showing the structure with a built-in tube sheet of this Invention , Figure 2 is an enlarged view of part A of the structure with a built-in tube sheet of this Invention , Figure 3 is an enlarged view of part B of the structure with a built-in tube sheet of this Invention , Figure 4 is a diagram showing the tube sheet of the structure with a built-in tube sheet of this Invention , Figure 5 is a diagram showing the support column of the structure with a built-in tube sheet of this Invention , Figure 6 is a diagram showing the side tubular structure of the structure with a built-in tube sheet of this Invention , Figure 7 is a diagram showing a plurality of tubular structures of the structure with a built-in tube sheet of this Invention . As shown in Figures 1 to 7, it shows the built-in tube sheet structure of a preferred embodiment applied to a heat exchanger with a housing, including a tube sheet 11 provided inside the housing 2 and not directly contacting the housing 2. By doing so, the tube sheet 11 can be hidden inside the housing 2, and since the tube sheet 11 is provided inside the housing 2, the longitudinal length of the entire equipment can be reduced. The tube sheet 11 is indirectly connected to the housing 2 via a short joint or a connecting pipe. More specifically, the tube sheet 11 is indirectly connected to the cap of the housing 2 via a short joint and / or a connecting pipe. Therefore, the area occupied by the cap and / or the connecting pipe is small, the opening is smaller, it is beneficial for reinforcement by drilling holes, and materials are saved.

[0027] Furthermore, as a preferred embodiment, the tube sheet 11 includes a plate-like structure 111 and a first annular structure 112 integrally provided on the outer edge of the plate-like structure 111, and the first annular structure 112 is provided on one side of the plate-like structure 111.

[0028] Furthermore, as a preferred embodiment, the tube sheet 11 includes a second annular structure 113 provided integrally at the central portion of the plate-like structure 111 and on the other side of the plate-like structure 111. A groove 114 is formed inside the second annular structure 113, and the distance from the end of the second annular structure 113 to the bottom of the groove 114 is smaller than the distance from the end of the second annular structure 113 to the plate-like structure 114.

[0029] Furthermore, as a preferred embodiment, the built-in tube sheet structure includes a tubular structure 3 penetrating through the housing 2. One end of the tubular structure 3 is provided outside the housing 2, and the other end of the tubular structure 3 is provided inside the housing 2 and connected to the tube sheet 11.

[0030] Also, as a preferred embodiment, the tubular structure 3 includes a tapered portion 301 connected to the tube sheet 11, a straight portion 302 connected to the tapered portion 301, and a connector 303 connected to the straight portion 302. One end of the tapered portion 301 with a relatively large inner diameter is connected to the tube sheet 11, and one end of the tapered portion 301 with a relatively small inner diameter is connected to the straight portion 302.

[0031] Furthermore, as a preferred embodiment, at least a part of the straight portion 302 is provided outside the housing 2, and at least a part of the straight portion 302 is provided inside the housing 2.

[0032] Furthermore, as another preferred embodiment, the outer periphery of the straight portion 302 is fixedly connected to the housing 2.

[0033] Also, as a preferred embodiment, the tubular structure 3 includes a first straight portion 311 connected to the tube sheet 11, a tapered portion 312 connected to the first straight portion 311, a second straight portion 313 connected to the tapered portion 312, and a connector 314 connected to the second straight portion 313. Here, the inner diameter of the first straight portion 311 is larger than the inner diameter of the second straight portion 313.

[0034] Furthermore, as a preferred embodiment, at least a part of the first straight portion 311 is provided outside the housing 2, and at least a part of the first straight portion 311 is provided inside the housing 2.

[0035] Furthermore, as a preferred embodiment, the outer periphery of the first straight portion 311 is fixedly connected to the housing 2.

[0036] Furthermore, as a preferred embodiment, the inner diameter of the first straight portion 311 is provided to be constant, and the outer diameter of the first straight portion 311 is provided with a variable diameter.

[0037] Furthermore, as a preferred embodiment, the outer diameter of the central portion of the first straight portion 311 is larger than the outer diameters of both ends of the first straight portion 311.

[0038] Furthermore, as a preferred embodiment, the central portion of the outer surface of the first straight portion 311 and both ends of the outer surface of the first straight portion 311 are connected via a tapered portion 312.

[0039] Furthermore, as a preferred embodiment, the heat exchanger includes a central cylinder 4, the tube sheet 11 may be perpendicular to the axis of the central cylinder 4, the tube sheet 11 may be parallel to the axis of the central cylinder 4, or an angle may be provided between the tube sheet 11 and the axis of the central cylinder 4.

[0040] Furthermore, as a preferred embodiment, the built-in tube sheet structure includes a support column 5. One end of the support column 5 is fixedly connected to the tube sheet 11, and the other end of the support column 5 is fixedly installed. The support column 5 is preferably a rigid support column, which enables the support column 5 to have a smaller elastic deformation.

[0041] Furthermore, as another preferred embodiment, the built-in tube sheet structure includes a support column 5. One end of the support column 5 is rotatably connected to the tube sheet 11, and the other end of the support column 5 is movable only in a first direction parallel to the plane where the tube sheet 11 is located.

[0042] Furthermore, as another preferred embodiment, the tube sheet built-in structure includes a support column 5, one end of the support column 5 is rotatably connected to the tube sheet 11, and the other end of the support column 5 is movable only in a second direction intersecting the plane where the tube sheet 11 is located.

[0043] Furthermore, as another preferred embodiment, the heat exchanger includes a central cylinder 4, the tube sheet 11 is provided parallel to the axis of the central cylinder 4, one end of the support column 5 is rotatably connected to the tube sheet 11, and the other end of the support column 5 is slidably connected to the central cylinder 4, and the other end of the support column 5 is slidable along the outer surface of the central cylinder 4.

[0044] The above are only the preferred embodiments of the present Invention and do not limit the embodiments and protection scope of the present Invention accordingly.

[0045] In addition to the above, the present Invention has the following multiple embodiments of the heat exchanger.

[0046] The first preferred embodiment of the heat exchanger: In the first preferred heat exchanger of the present Invention , the heat exchanger includes a housing 2 including a cylindrical body 21 and caps 22 respectively provided at the upper and lower ends of the cylindrical body 21.

[0047] In the first preferred heat exchanger of the present Invention , the heat exchanger is provided inside the housing 2 and includes a tube sheet 11 located at the upper part of the housing 2.

[0048] In the first preferred heat exchanger of the present Invention , the tubular structure 3 penetrates the housing 2, one end of the tubular structure 3 is provided outside the housing 2, and the other end of the tubular structure 3 is provided inside the housing 2 and connected to the tube sheet 11.

[0049] In the first preferred heat exchanger of the present InventionIn the first preferred heat exchanger, the tubular structure 3 includes a tapered portion 301 connected to the tube sheet 11, a straight portion 302 connected to the tapered portion 301, and a connector 303 connected to the straight portion 302. Among them, one end with a relatively larger inner diameter of the tapered portion 301 is connected to the tube sheet 11, and one end with a relatively smaller inner diameter of the tapered portion 301 is connected to the straight portion 302.

[0050] This Invention In the first preferred heat exchanger, the upper part of the straight portion 302 is provided outside the housing 2, and the lower part of the straight portion 302 is provided inside the housing 2.

[0051] This Invention In the first preferred heat exchanger, the outer periphery of the straight portion 302 is fixedly connected to the housing 2.

[0052] This Invention In the first preferred heat exchanger, the heat exchanger further includes a second tube sheet located at the lower end of the housing 2 and having its outer periphery fixedly connected to the cap 22.

[0053] This Invention In the first preferred heat exchanger, the above-mentioned heat exchanger is provided with a shell stroke joint (not shown) at the cap 22 at the upper end of the cylindrical body 21, and another shell stroke joint is provided on the side surface of the cylindrical body 21.

[0054] Examples of the second preferred heat exchanger: This Invention In the second preferred heat exchanger, the heat exchanger includes a housing 2 including a cylindrical body 21 and caps 22 respectively provided at the upper and lower ends of the cylindrical body 21.

[0055] This Invention In the second preferred heat exchanger, the heat exchanger further includes a tube sheet 11 provided inside the housing 2, located at the upper part of the housing 2, and provided horizontally.

[0056] ThisInvention In the second preferred heat exchanger, the heat exchanger further includes: an upper tubular structure, which includes an upper conical part connected to the upper tube sheet, an upper straight part connected to the upper conical part, and an upper connector connected to the upper straight part. Among them, one end of the upper conical part with a relatively large inner diameter is connected to the upper tube sheet, one end of the upper conical part with a relatively small inner diameter is connected to the upper straight part, at least a part of the upper straight part is provided outside the housing, at least a part of the upper straight part is provided inside the housing, and the outer periphery of the upper straight part is fixedly connected to the cap at the upper end of the cylinder body.

[0057] This Invention In the second preferred heat exchanger, the heat exchanger further includes a side tube sheet provided inside the housing, located at the lower part of the housing, and provided vertically.

[0058] This Invention In the second preferred heat exchanger, the heat exchanger further includes a side tubular structure, which includes a side first straight part connected to the side tube sheet, a side tapered part connected to the side first straight part, a side second straight part connected to the side tapered part, and a side connector connected to the side second straight part. Among them, the inner diameter of the side first straight part is larger than that of the side second straight part, at least a part of the side first straight part is provided outside the cylinder body, at least a part of the side first straight part is provided inside the cylinder body, and the outer periphery of the side first straight part is fixedly connected to the cylinder body.

[0059] This Invention In the second preferred heat exchanger, a first shell stroke joint 61 is provided on one side of the cap 22 at the upper end of the cylinder body 21, and a second shell stroke joint 62 is provided at the central part of the cap 22 at the lower end of the cylinder body 21.

[0060] Embodiment of the third preferred heat exchanger: This InventionIn the third preferred heat exchanger, both the upper and lower ends of the heat exchanger adopt the above-mentioned tube sheet built-in structure, and at least one or two of the shell stroke joints are provided on the cap of the housing of the heat exchanger, that is, the shell stroke joint is located on one side of the straight part 302 of the tube sheet built-in structure.

[0061] Alternatively, both the upper and lower ends of the heat exchanger adopt the above-mentioned tube sheet built-in structure, and all the shell stroke joints are provided on the cylinder body of the housing of the heat exchanger.

[0062] Example of the fourth preferred heat exchanger: This Invention In the fourth preferred heat exchanger of this, one of the upper end and the lower end of the heat exchanger adopts the above-mentioned tube sheet built-in structure, and one or more of the above-mentioned tube sheet built-in structures are adopted on the side surface of the cylinder body of the heat exchanger. On the other hand, one of the shell stroke joints is provided on the cap of the housing of the heat exchanger, and the other shell stroke joint is provided at the center of the cap at the lower end of the shell of the heat exchanger.

[0063] What has been described above is only a preferred embodiment of this Invention and thus does not limit the embodiments and protection scope of this Invention For those skilled in the art, it should be recognized that the equivalent substitutions and easily visible changes made using the content of this specification and the drawings should be included in the protection scope of this Invention specification. Invention The invention described in the original claims of this application is appended below. [1] A tube sheet built-in structure applicable to a heat exchanger, wherein the heat exchanger includes a housing, and is characterized in that it includes a tube sheet provided inside the housing and not in direct contact with the housing. [2] The above tube sheet includes a plate-like structure and a first annular structure integrally provided at the outer edge of the plate-like structure, and the first annular structure is provided on one side of the plate-like structure. More preferably, the above tube sheet includes a second annular structure integrally provided at the central part of the plate-like structure, and the second annular structure is provided on the other side of the plate-like structure. Among them, a groove is formed inside the second annular structure, and the distance from the end of the second annular structure to the bottom of the groove is smaller than the distance from the end of the second annular structure to the plate-like structure, which is the above tube sheet built-in structure of [1]. [3] The above tube sheet built-in structure of [1] is characterized by including a tubular structure that penetrates the housing, one end of which is provided outside the housing, and the other end of which is provided inside the housing and connected to the above tube sheet. [4] The above tubular structure includes a tapered portion connected to the above tube sheet, a straight portion connected to the above tapered portion, and a connector connected to the above straight portion. Among them, the end with a relatively larger inner diameter of the above tapered portion is connected to the above tube sheet, and the end with a relatively smaller inner diameter of the above tapered portion is connected to the above straight portion. ​ More preferably, at least a part of the above straight portion is provided outside the housing, and at least a part of the above straight portion is provided inside the housing. More preferably, the outer periphery of the above straight portion is fixedly connected to the above housing, which is the above tube sheet built-in structure of [3]. [5] The above-mentioned tubular structure includes a first straight portion connected to the above-mentioned tube sheet, a tapered portion connected to the above-mentioned first straight portion, a second straight portion connected to the above-mentioned tapered portion, and a connector connected to the above-mentioned second straight portion. Among them, the inner diameter of the above-mentioned first straight portion is larger than the inner diameter of the above-mentioned second straight portion. More preferably, at least a part of the above-mentioned first straight portion is provided outside the above-mentioned housing, and at least a part of the above-mentioned first straight portion is provided inside the above-mentioned housing. More preferably, the outer periphery of the above-mentioned first straight portion is fixedly connected to the above-mentioned housing, which is the above-mentioned tube sheet built-in structure of [3]. [6] The inner diameter of the above-mentioned first straight portion is provided to be constant, and the outer diameter of the above-mentioned first straight portion is provided with a variable diameter. More preferably, the outer diameter of the central portion of the above-mentioned first straight portion is larger than the outer diameters of both ends of the above-mentioned first straight portion. More preferably, the central portion of the outer surface of the above-mentioned first straight portion and both ends of the outer surface of the above-mentioned first straight portion are both connected by a tape portion, which is the above-mentioned tube sheet built-in structure of [5]. [7] The above-mentioned heat exchanger includes a central cylinder. The above-mentioned tube sheet may be perpendicular to the axis of the above-mentioned central cylinder, may be parallel to the axis of the above-mentioned central cylinder, or may have an angle between the above-mentioned tube sheet and the axis of the above-mentioned central cylinder, which is the above-mentioned tube sheet built-in structure of [1]. [8] The above-mentioned tube sheet built-in structure of [1] further includes a support column with one end fixedly connected to the above-mentioned tube sheet and the other end fixedly provided. [9] Including a support column with one end rotatably connected to the above-mentioned tube sheet and the other end movable only in a first direction parallel to the plane where the above-mentioned tube sheet is located. Or, including a support column with one end rotatably connected to the above-mentioned tube sheet and the other end movable only in a second direction intersecting the plane where the above-mentioned tube sheet is located. More preferably, the above-mentioned heat exchanger includes a central cylinder. The above-mentioned tube sheet is provided parallel to the axis of the above-mentioned central cylinder. One end of the above-mentioned support column is rotatably connected to the above-mentioned tube sheet, and the other end of the above-mentioned support column is slidably connected to the above-mentioned central cylinder. The other end of the above-mentioned support column is slidable along the outer surface of the above-mentioned central cylinder, which is the above-mentioned tube sheet built-in structure of [1].

[10] A swirling-flow coiled tube heat exchanger including the above-described tube sheet built-in structure of any one or more of [1]-[9] above.

Claims

1. A tube sheet built-in structure applied to a heat exchanger, wherein the heat exchanger comprises a housing and a central cylinder, The above tube sheet built-in structure is A tube sheet provided inside the above housing and not in direct contact with the above housing, the above tube sheet may be perpendicular to the axis of the above central cylinder, the above tube sheet may be parallel to the axis of the above central cylinder, or the above tube sheet and the axis of the above central cylinder may have an angle therebetween, the said tube sheet, A tubular structure passing through the above housing, one end of which is provided outside the above housing, and the other end of which is provided inside the above housing and connected to the above tube sheet, A support column having one end fixedly connected to the above tube sheet and the other end fixedly connected to the above central cylinder, characterized in that it includes a tube sheet built-in structure.

2. The above tube sheet includes a plate-like structure and a first annular structure integrally provided on the outer edge of the above plate-like structure, and the above first annular structure is provided on one side of the above plate-like structure, characterized in that it is the above tube sheet built-in structure of Claim 1.

3. The above tubular structure includes a tapered portion connected to the above tube sheet, a straight portion connected to the above tapered portion, and a connector connected to the above straight portion. Among them, the end with a relatively larger inner diameter of the above tapered portion is connected to the above tube sheet, and the end with a relatively smaller inner diameter of the above tapered portion is connected to the above straight portion, characterized in that it is the above tube sheet built-in structure of Claim 1.

4. The above tubular structure includes a first straight portion connected to the above tube sheet, a tapered portion connected to the above first straight portion, a second straight portion connected to the above tapered portion, and a connector connected to the above second straight portion. Among them, the inner diameter of the above first straight portion is larger than the inner diameter of the above second straight portion, characterized in that it is the above tube sheet built-in structure of Claim 1.

5. The inner diameter of the above first straight portion is provided to be constant, and the outer diameter of the above first straight portion is provided with a variable diameter, characterized in that it is the above tube sheet built-in structure of Claim 4.

6. A heat exchanger including the above tube sheet built-in structure of one or more of the above Claims 1.

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