High-pressure heat exchanger with tube plate and tube box in threaded connection

Abstract

The utility model discloses a high-pressure heat exchanger with tube plates and tube boxes in threaded connection, which relates to the technical field of heat exchangers and comprises a shell pass barrel, a first tube plate and a second tube plate are respectively mounted at two ends of the shell pass barrel, and a first tube box and a second tube box are respectively mounted on the outer sides of the first tube plate and the second tube plate. The inner wall of the opening position of the first tube plate is provided with an internal thread, the outer side, connected with the first tube plate, of the first tube box is provided with an external thread, and the first tube plate is connected with the external thread of the first tube box through the internal thread of the first tube plate; according to the utility model, the tube plate and the tube box are in threaded connection instead of conventional connection of a high-pressure flange and a stud, and the high-pressure load of the tube pass is borne by the threads, so that the connecting structure of the tube plate and the tube box is more compact, the material consumption is low, the manufacturing cost is reduced, and the structure is suitable for a high-pressure heat exchanger with a smaller diameter.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a high-pressure heat exchanger in which a tube sheet and a tube box are connected by threads. Background Art

[0002] In the fields of petroleum, chemical industry, metallurgy, electricity, nuclear power, etc., heat exchangers are devices that complete heat exchange of media, achieving heating and cooling of the media, and have a wide range of applications.

[0003] With the continuous development of engineering technology, the application scope of high-pressure heat exchangers is getting wider and wider. In high-pressure heat exchangers, when the tube side is high pressure, the connection structure between the tube box and the tube sheet is a pair of high-pressure flange connection structures. There is a high-pressure flange on the tube box, and the outside of the tube sheet also serves as the high-pressure flange. Since the high-pressure flange needs to withstand high-pressure loads, the size is large, and the specifications of the connecting studs connecting the two are also large. The whole structure is quite bulky and the cost is also high. Even for some small-diameter high-pressure heat exchangers, the equipment body is relatively small, but the size of the connection parts between the tube box and the tube sheet at both ends is very large. Utility Model Content

[0004] The utility model aims to provide a high-pressure heat exchanger with a tube sheet and a tube box connected by threads, so as to solve the problems raised in the background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-pressure heat exchanger with a tube sheet and a tube box connected by threads, comprising a shell-side cylinder, a first tube sheet and a second tube sheet are respectively installed at both ends of the shell-side cylinder, and a first tube box and a second tube box are respectively installed on the outer sides of the first tube sheet and the second tube sheet, a plurality of baffles are fixedly installed inside the shell-side cylinder, and a plurality of heat exchange tubes are respectively installed between the baffles and the first tube sheet and the second tube sheet;

[0007] The first tube sheet and the second tube sheet both have internal threads on their inner cylindrical surfaces, the first tube box and the second tube box have external threads on their outer cylindrical surfaces matching the internal threads on the first tube sheet and the second tube sheet, and the internal threads on the first tube sheet and the second tube sheet are respectively screwed together with the external threads on the first tube box and the second tube box.

[0008] As a further technical solution of the utility model, a sealing groove is provided on the annular end surface of the first tube sheet, and a sealing ring is provided in the sealing groove.

[0009] As a further technical solution of the utility model, a first welding groove is provided at the outer edge position where the first tube sheet is connected to the first tube box, and a second welding groove is provided at a position of the first tube box corresponding to the first welding groove, the first welding groove and the second welding groove are connected to form a welding groove, and the welding groove is filled with welding material to form a sealed weld.

[0010] As a further technical solution of the utility model, the top end of the shell-side cylinder is respectively connected with a shell-side material outlet and a shell-side material inlet near the first tube sheet and the second tube sheet, and two sets of symmetrical supports are fixedly installed at the bottom end of the shell-side cylinder.

[0011] As a further technical solution of the utility model, one end of the first tube box away from the first tube sheet is penetrated and connected with a tube-side material inlet.

[0012] As a further technical solution of the utility model, one end of the second tube box away from the second tube sheet is penetrated and connected with a tube-side material outlet.

[0013] As a further technical solution of the utility model, the first tube sheet and the second tube sheet are symmetrical with respect to the shell-side cylinder, and the first tube box and the second tube box are symmetrical with respect to the shell-side cylinder.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model uses a threaded connection structure between the tube sheet and the tube box to replace the conventional high-pressure flange and stud connection, so that the connection structure between the two is more compact, and at the same time, the overall structure is lighter and the cost is lower.

[0016] The utility model has a structure of a sealing groove and a sealing ring, which is suitable for situations where disassembly is required frequently; a structure with a welding groove and a sealing weld is generally suitable for situations where disassembly is rarely required; when disassembly is required, the sealing weld can be ground off and then disassembly can be performed, and the sealing weld can be re-welded after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the overall structure of a high-pressure heat exchanger in which a tube sheet and a tube box are connected by threads.

[0018] Figure 2 The utility model is a schematic diagram of a first tube sheet in a high-pressure heat exchanger in which a tube sheet and a tube box are connected by threads.

[0019] Figure 3 The utility model is a schematic diagram of a first tube box in a high-pressure heat exchanger in which a tube sheet and a tube box are connected by threads.

[0020] Figure 4The utility model is a high-pressure heat exchanger with a tube sheet and a tube box connected by threads. Figure 2 A partial enlarged view of point B in the middle.

[0021] Figure 5 The utility model is a high-pressure heat exchanger with a tube sheet and a tube box connected by threads. Figure 1 A partial enlarged view of point A in the middle.

[0022] In the figure: 1. shell-side cylinder; 10. shell-side material outlet; 11. shell-side material inlet; 12. baffle; 13. heat exchange tube; 2. first tube sheet; 20. first welding groove; 21. sealing groove; 22. sealing ring; 23. internal thread; 3. second tube sheet; 4. first pipe box; 40. tube-side material inlet; 41. external thread; 42. second welding groove; 5. second pipe box; 50. tube-side material outlet; 6. support. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 In an embodiment of the utility model, a high-pressure heat exchanger with a tube sheet and a tube box connected by threads comprises a shell-side cylinder 1, a first tube sheet 2 and a second tube sheet 3 are respectively installed at both ends of the shell-side cylinder 1, and a first tube box 4 and a second tube box 5 are respectively installed on the outer sides of the first tube sheet 2 and the second tube sheet 3, a plurality of baffles 12 are fixedly installed inside the shell-side cylinder 1, and a plurality of heat exchange tubes 13 are respectively installed between the baffles 12 and the first tube sheet 2 and the second tube sheet 3;

[0025] The first tube sheet 2 and the second tube sheet 3 both have internal threads 23 on their inner cylindrical surfaces, and the first tube box 4 and the second tube box 5 have external threads 41 on their outer cylindrical surfaces that match the internal threads 23 on the first tube sheet 2 and the second tube sheet 3. The internal threads 23 on the first tube sheet 2 and the second tube sheet 3 are screwed together with the external threads 41 on the first tube box 4 and the second tube box 5, respectively.

[0026] In this embodiment, a sealing groove 21 is provided on the annular end surface of the first tube sheet 2 , and a sealing ring 22 is provided in the sealing groove 21 .

[0027] In this embodiment, a first welding groove 20 is provided at the outer edge where the first tube sheet 2 and the first tube box 4 meet, and a second welding groove 42 is provided at a position of the first tube box 4 corresponding to the first welding groove 20. The first welding groove 20 and the second welding groove 42 are connected to form a welding groove, and the welding groove is filled with welding material to form a sealed weld.

[0028] In this embodiment, the top of the shell-side cylinder 1 is respectively connected with a shell-side material outlet 10 and a shell-side material inlet 11 near the first tube sheet 2 and the second tube sheet 3, and two sets of symmetrical supports 6 are fixedly installed at the bottom end of the shell-side cylinder 1.

[0029] In this embodiment, a tube-side material inlet 40 is penetrated and connected to one end of the first tube box 4 away from the first tube sheet 2 .

[0030] In this embodiment, one end of the second tube box 5 away from the second tube sheet 3 is penetrated and connected with a tube-side material outlet 50 .

[0031] In this embodiment, the first tube sheet 2 and the second tube sheet 3 are symmetrical with respect to the shell-side cylinder 1 , and the first tube box 4 and the second tube box 5 are symmetrical with respect to the shell-side cylinder 1 .

[0032] The working principle of the utility model is as follows: when in use, the material fluid to be heat exchanged is introduced through the shell-side material inlet 11, so that it enters the inside of the shell-side cylinder 1. At the same time, another heat exchange material fluid is injected into the inside of the tube-side material inlet 40, so that it enters the first tube sheet 2 along the first tube box 5, and enters the inside of the heat exchange tube 13 along the first tube sheet 2, and finally enters the second tube box 5 outside the second tube sheet 3 along the end of the heat exchange tube 13, and finally is discharged along the shell-side material outlet 10, completing the heat exchange process;

[0033] In the utility model, the conventional high-pressure flange and stud connection is replaced by the threaded connection between the tube sheet and the tube box, and the high-pressure load of the tube side is borne by the thread, so that the connection structure between the tube sheet and the tube box is more compact, the material consumption is small, and the cost is reduced. This structure is suitable for high-pressure heat exchangers with smaller diameters;

[0034] The structure with the sealing groove 21 and the sealing ring 22 is suitable for the situation where it needs to be disassembled frequently.

[0035] The structure with welding groove and sealing weld is generally suitable for the situation that it is seldom necessary to disassemble. When it is necessary to disassemble, the sealing weld can be ground off and then disassembled. The sealing weld can be re-welded after assembly.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-pressure heat exchanger with a threaded connection between the tube sheet and the tube box, characterized in that: The invention comprises a shell-side cylinder (1), wherein a first tube sheet (2) and a second tube sheet (3) are respectively installed at both ends of the shell-side cylinder (1), and a first tube box (4) and a second tube box (5) are respectively installed on the outer sides of the first tube sheet (2) and the second tube sheet (3); a plurality of baffles (12) are fixedly installed inside the shell-side cylinder (1), and a plurality of heat exchange tubes (13) are respectively installed between the baffles (12) and the first tube sheet (2) and the second tube sheet (3); The first tube sheet (2) and the second tube sheet (3) have internal threads (23) on their inner cylindrical surfaces, and the first tube box (4) and the second tube box (5) have external threads (41) on their outer cylindrical surfaces that match the internal threads (23) on the first tube sheet (2) and the second tube sheet (3). The internal threads (23) on the first tube sheet (2) and the second tube sheet (3) are screwed together with the external threads (41) on the first tube box (4) and the second tube box (5), respectively.

2. A high-pressure heat exchanger with threaded connection between tube sheet and tube box according to claim 1, characterized in that: A sealing groove (21) is provided on the annular end surface of the first tube sheet (2), and a sealing ring (22) is provided in the sealing groove (21).

3. A high-pressure heat exchanger with threaded connection between tube sheet and tube box according to claim 1, characterized in that: A first welding groove (20) is provided at an outer edge position where the first tube sheet (2) and the first tube box (4) are connected, and a second welding groove (42) is provided at a position of the first tube box (4) corresponding to the first welding groove (20), the first welding groove (20) and the second welding groove (42) being connected to form a welding groove, and the welding groove is filled with welding material to form a sealed weld.

4. A high-pressure heat exchanger with threaded connection between tube sheet and tube box according to claim 1, characterized in that: The top end of the shell-side cylinder (1) is connected to a shell-side material outlet (10) and a shell-side material inlet (11) at positions close to the first tube sheet (2) and the second tube sheet (3), respectively, and two groups of symmetrical supports (6) are fixedly mounted at the bottom end of the shell-side cylinder (1).

5. A high-pressure heat exchanger with threaded connection between tube sheet and tube box according to claim 1, characterized in that: An end of the first tube box (4) away from the first tube sheet (2) is penetrated and connected with a tube-side material inlet (40).

6. A high-pressure heat exchanger with threaded connection between tube sheet and tube box according to claim 1, characterized in that: One end of the second tube box (5) away from the second tube sheet (3) is connected through a tube-side material outlet (50).

7. A high-pressure heat exchanger with threaded connection between tube sheet and tube box according to claim 1, characterized in that: The first tube sheet (2) and the second tube sheet (3) are symmetrical with respect to the shell-side cylinder (1), and the first tube box (4) and the second tube box (5) are symmetrical with respect to the shell-side cylinder (1).

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